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MPD-05-0067-YL WWHM WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin D Flows To Polnt of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 DEVELOPED LAND USE -' Basin Basin D Flows To Bio-Infiltration Swale D Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 RCHRES (POND) INFORMATION Pond Name: Bio-Inf~ltratlon Swale D Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not acta.vated. Dimensions Depth: aft. Bottom Length: 160ft. Bottom Width 10ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Sa.de slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 ln. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.9 0.037 0.000 0.000 0.000 333.0 0.039 0.003 0.000 6.370 333.1 0.040 0.006 0.000 0.370 333.1 0.042 0.009 0.000 0.370 333.2 0.044 0.013 O.C00 0.370 ~ oEw ~~r~C ~~ )~r ~~ g = ~~ ~ ~ q/~KS" ~ B ~C~STEKt'~ ~~ ~ Sfol~lALr~~4 ~g~1Q~i ~'m-v .....,.. ~PtRES: 1)-22- R 333.3 0.046 0.016 0.000 0.370 333.4 0.047 0.020 0.000 0.370 333.4 0.049 0.023 0.411 0.370 333.5 0.051 0.027 1.873 0.370 333.6 0.053 0.031 3.920 0.370 333.7 0.055 0.036 6.416 0.370 333.8 0.057 0.040 9.292 0.370 333.8 0.058 0.044 12.50 0.370 333.9 0.060 0.049 16.01 0.370 334.0 0.062 0.054 19.81 0.370 334.1 0.064 0.059 23.86 0.370 334.1 0.066 0.064 28.15 0.370 334.2 0.068 0.069 32.67 0.370 334.3 0.069 0.074 37.42 0.370 334.4 0.071 0.080 42.37 0.370 334.5 0.073 0.085 47.53 0.370 334.5 0.075 0.091 52.88 0.370 334.6 0.077 0.097 58.41 0.370 334.7 0.079 0.103 64.13 0.370 334.8 0.081 0.109 70.02 0.370 334.8 0.083 0.116 76.08 0.370 334.9 0.085 0.122 82.31 0.370 335.0 0.086 0.129 88.70 0.370 335.1 0.088 0.136 95.24 0.370 335.2 0.090 0.142 101.9 0.370 335.2 0.092 0.150 108.8 0.370 335.3 0.094 0.157 115.8 0.370 335.4 0.096 0.164 122.9 0.370 335.5 0.098 0.172 130.2 0.370 335.5 0.100 0.179 137.6 0.370 335.6 0.102 0.187 145.2 0.370 335.7 0.104 0.195 152.9 0.370 335.8 0.106 0.204 160.7 0.370 335.9 0.108 0.212 168.6 0.370 335.9 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Mitigated Flow (cfs ) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.435 0.000 1957 0.698 0.367 1958 0.401 0.000 1959 0.467 0.000 1960 0.515 0.068 1961 0.344 0.000 1962 0.369 0.000 1963 0.749 0.199 1964 0.538 0.081 1965 0.507 0.122 1966 0.356 0.000 1967 0.438 0.000 1968 0.341 0.000 1969 0.337 0.000 1970 0.336 0.000 1971 0.418 0.000 1972 0.508 0.112 1973 0.395 0.000 1974 0.460 0.048 1975 0.399 0.000 1976 0.460 0.000 1977 0.581 0.095 1978 0.494 0.060 1979 0.588 0.034 1980 0.441 0.000 1981 0.505 0.110 1982 0.583 0.081 1983 0.624 0.192 1984 0.381 0.000 1985 0.440 0.000 1986 0.492 0.115 1987 0.533 0.179 1988 0.292 0.000 1989 0.349 0.000 1990 0.689 0.296 1991 0.709 0.312 1992 0.429 0.000 1993 0.314 0.000 1994 0.349 0.000 1995 0.506 0.118 1996 0.513 0.125 1997 0.413 0.000 1998 0.579 0.080 1999 0.498 0.059 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7086 0.3118 2 0.6983 0.2961 3 0.6887 0.1993 4 0.6239 0.1916 5 0.5878 0.1792 6 0.5828 0.1246 7 0.5813 0.1223 8 0.5793 0.1179 9 0.5382 0.1154 10 0.5326 0.1121 11 0.5146 0.1100 12 0.5132 0.0947 13 0.5075 0.0814 14 0.5072 0.0808 15 0.5056 0.0805 16 0.5051 0.0675 17 0.4975 0.0604 18 0.4938 0.0589 19 0.4918 0.0482 20 0.4675 0.0341 21, 0.4604 0.0000 22 0.4603 0.0000 23 0.4408 0.0000 24 0.4403 0.0000 25 0.4382 0.0000 26 0.4353 0.0000 27 0.4288 0.0000 28 0.4181 0.0000 29 0.4135 0.0000 30 0.4008 0.0000 31 0.3989 0.0000 32 0.3954 0.0000 33 0.3811 0.0000 34 0.3692 0.0000 35 0.3556 0.0000 36 0.3492 0.0000 37 0.3491 0.0000 38 0.3442 0.0000 39 0.3412 0.0000 40 0.3367 0.0000 41 0.3362 0.0000 42 0.3142 0.0000 43 0.2918 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2290 1050 6 .0 Pass 0.2342 972 6 .0 Pass 0.2395 904 6 .0 Pass 0.2448 835 6 .0 Pass 0.2500 777 5 .0 Pass 0.2553 712 5 .0 Pass 0.2606 665 5 .0 Pass 0.2658 623 5 .0 Pass 0.2711 574 5 .0 Pass 0.2764 531 5 .0 Pass 0.2816 497 5 1.0 Pass 0.2869 459 3 .0 Pass 0.2921 422 3 .0 Pass 0.2974 389 2 .0 Pass 0.3027 356 2 .0 Pass 0.3079 338 2 .0 Pass 0.3132 312 1 .0 Pass 0.3185 296 1 .0 Pass 0.3237 275 1 .0 Pass 0.3290 255 1 .0 Pass 0.3343 236 1 .0 Pass 0.3395 219 1 .0 Pass 0.3448 199 1 .0 Pass 0.3501 184 1 .0 Pass 0.3553 172 1 .0 Pass 0.3606 166 1 .0 Pass 0.3658 161 1 .0 Pass 0.3711 153 0 .0 Pass 0.3764 146 0 .0 Pass 0.3816 143 0 .0 Pass 0.3869 138 0 .0 Pass 0.3922 134 0 .0 Pass 0.3974 122 0 .0 Pass 0.4027 116 0 .0 Pass 0.4080 110 0 .0 Pass 0.4132 101 0 .0 Pass 0.4185 97 0 .0 Pass 0.4238 90 0 .0 Pass 0.4290 86 0 .0 Pass 0.4343 79 0 .0 Pass 0.4395 73 0 .0 Pass 0.4448 69 0 .0 Pass 0.4501 63 0 .0 Pass 0.4.553 60 0 .0 Pass 0.4606 58 0 .0 Pass 0.4659 54 0 .0 Pass 0.4711 49 0 .0 Pass 0.4764 47 0 .0 Pass 0.4817 45 0 .0 Pass 0.4869 42 0 .0 Pass 0.4922 37 0 .0 Pass 0.4975 36 0 .0 Pass 0.5027 32 0 .0 Pass 0.5080 28 0 .0 Pass 0.5133 26 0 .0 Pass 0.5185 24 0 .0 Pass 0.5238 23 0 .0 Pass 0.5290 20 0 .0 Pass 0.5343 18 0 .0 Pass 0.5396 16 0 .0 Pass 0.5448 16 0 .0 Pass 0.5501 16 0 .0 Pass 0.5554 16 0 .0 Pass 0.5606 15 0 .0 Pass 0.5659 13 0 .0 Pass 0.5712 12 0 .0 Pass 0.5764 12 0 .0 Pass 0.5817 11 0 .0 Pass 0.5870 9 0 .0 Pass 0.5922 8 0 .0 Pass 0.5975 8 0 .0 Pass 0.6027 8 0 .0 Pass 0.6080 8 0 .0 Pass 0.6133 7 0 .0 Pass 0.6185 6 0 .0 Pass 0.6238 6 0 .0 Pass 0.6291 5 0 .0 Pass 0.6343 5 0 .0 Pass 0.6396 5 0 .0 Pass 0.6449 5 0 .0 Pass 0.6501 5 0 .0 Pass 0.6554 5 0 .0 Pass 0.6607 5 0 .0 Pass 0.6659 5 0 .0 Pass 0.6712 5 0 .0 Pass 0.6764 5 0 .0 Pass 0.6817 5 0 .0 Pass 0.6870 5 0 .0 Pass 0.6922 4 0 .0 Pass 0.6975 4 0 .0 Pass 0.7028 2 0 .0 Pass 0.7080 2 0 .0 Pass 0.7133 1 0 .0 Pass 0.7186 1 0 .0 Pass 0.7238 1 0 .0 Pass 0.7291 1 0 .0 Pass 0.7344 1 0 .0 Pass 0.7396 1 0 .0 Pass 0.7449 1 0 .0 Pass 0.7502 0 0 .0 Pass Water Quality SMP Flow and Volume. On-line Facility volume: 0.239 acre-feet On-line Facility target Flow: 0.25 cfs. Adjusted For 15 m1n• 0.28 cfs. O££-line facila.ty target flow: 0.14 c£s. Adjusted for 15 min. 0.16 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardin the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims ali warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damag for loss of business profits, loss of business information, business interruption, and the like) arising out of th user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEAR FLOW 4ns? 100 8029 "~ w° "' 1Q0 kkkk;~kkkkkk?4~904i-0~'~y9gc 50 7502 25 6960 i0 6207 j 1'~ dsx~ooo~o~ov'd49pOaO4 5 5583 ~ ~ gc,04o4O4o'~ k7t 2 a5T9 ~ 10E 1 o Rede~rsleped El i fi d MlRi i d ,~ - t~ e+ e pe ga e v N ~ ~.y 1~ iC 3 , ~ ~QF~ `~ ~~ ~ ° 1 10 20 3D d0 5D 68 70 80 ~ 9~ Cumulative Probabil' Yearly Peaks for Predeveloped Flow Frequency Chart YEAR FIOtU td's -- 100 ~ ao~s ---------- 0 7s ~v~.de~p~-..____ -_~q H~ ~______ ~ 50 7502 ~-°-•-----~~* x Developed with Faedrtp 25 6960 0 62 °- ...~.~~~ ~ ~.._.. .. ~. .. __. _ m.~.. _....._..____._.. 10 ,6207 ~ 449 ~. .......~..._......~..~...~_ ........~.~ .. 5 .5583 ~% ~ ' 036 ~_~k _ _____ __ _ ~______ ~ ~ 2 4539 023 .--~- -_____ _ __ ,{ ._____ ______ ~__ _________ t4 t ttf O ' ; ~ ~ ~ 10E-5 ~ 10E•a 10E•3 10E-2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph 'GEAR FIOW (ds) i 100 11 38 ~--°-- 50 7 701 25 5045 10 2.681 °'-_~---------~-°.°- 5 1 Sib 2 .5459 'early Peaks for Developed W/Pond CLEARHIS BSN D1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN D1 0 04 7 83 0 0138 0 19 SBUH/SCS TYPEIA 6 mo BSN D1 0 07 7 83 0.0239 0 19 SBUH/SCS TYPEIA 2 yr BSN D1 0 12 7 83 0 0385 0 19 SBUH/SCS TYPEIA 10 yr BSN D1 0 14 7 83 0 0460 0 19 SBUH/SCS TYPE1A 25 yr BSN D1 0 15 7 83 0 0498 0.19 SBUH/SCS TYPEIA 50 yr BSN D1 0 16 7 83 0 0536 0 19 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN D1 Hyd Method• SBUH Hyd Loss Method: SCS CN Number Peak Factor 484 00 SCS Abs: 0 20 Storm Dur• 24 00 hrs Intv 10 00 min Area CN TC Pervious 0 0411 ac 78 00 0 03 hrs Impervious 0.1502 ac 98 00 0 03 hrs Total 0 1913 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0411 ac Impervious CN Data: ROADWAY 98 00 0 0802 ac SIDWALK 98 00 0 0241 ac DRIVEWAY 98 00 0 0459 ac Pervious TC Data: Flow type: Descnption. Length• Slope• Coeff: Travel Time Sheet Across Planter Stnp 6.00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type. Descnption Length: Slope: Coeff: Travel Time Shallow Along Flow Line of Gutter 195 00 ft 2.35% 27.0000 0 79 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20 00 ft 2.00% 0.0110 0.42 min BSN D2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN D2 0.05 7 83 0 0151 0 21 SBUH/SCS TYPEIA 6 mo BSN D2 0 08 7 83 0 0260 0 21 SBUH/SCS TYPE1A 2 yr BSN D2 0 13 7 83 0 0420 0 21 SBUH/SCS TYPEIA 10 yr BSN D2 0 15 7 83 0 0501 0 21 SBUH/SCS TYPEIA 25 yr BSN D2 0 16 7 83 0 0542 0 21 SBUH/SCS TYPE1A 50 yr BSN D2 0 18 7 83 0 0583 0 21 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN D2 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484.00 SCS Abs 0 20 Storm Dur• 24.00 hrs Intv• 10 00 min Area CN TC Pervious 0.0425 ac 78 00 0 03 hrs Impervious 0 1645 ac 98 00 0 05 hrs Total 0 2070 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0425 ac Impervious CN Data: ROADWAY 98 00 0.0971 ac SIDWALK 98 00 0 0215 ac DRIVEWAY 98 00 0 0459 ac Pervious TC Data: Flow type Description: Length• Slope. Coeff• Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type. Description. Length: Slope: Coeff• Travel Time Shallow Along Flow Line of Gutter 250 00 ft 1.18% 27.0000 1 42 min Sheet Across Roadway 18 50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 50.00 ft 0.50% 21.0000 0.56 min Sheet Across Sidewalks 5 00 ft 2.00% 0 0110 0 14 min Sheet Across Driveway 20.00 ft 2.00% 0 0110 0.42 min BSN D3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN D3 0 05 7 83 0 0151 0 20 SBUH/SCS TYPE1A 6 mo BSN D3 0.08 7 83 0 0258 0 20 SBUH/SCS TYPE1A 2 yr BSN D3 0 12 7 83 0 0414 0 20 SBUH/SCS TYPEIA 10 yr BSN D3 0 15 7 83 0 0493 0 20 SBUH/SCS TYPEIA 25 yr BSN D3 0 16 7 83 0 0533 0 20 SBUH/SCS TYPEIA 50 yr BSN D3 0 17 7 83 0 0573 0 20 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN D3 Hyd Method SBUH Hyd Loss Method: SCS CN Number Peak Factor 484 00 SCS Abs: 0 20 Storm Dur 24 00 hrs Intv 10 00 min Area CN TC Pervious 0.0345 ac 78.00 0 03 hrs Impervious 0.1653 ac 98.00 0 06 hrs Total 0 1998 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0 0345 ac Impervious CN Data: DRIVEWAY 98.00 0.0574 ac SIDWALK 98.00 0.0255 ac ROADWAY 98 00 0 0824 ac Pervious TC Data: Flow type. Description Length: Slope: Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description Length: Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 197 00 ft 0.50% 27.0000 2 28 min Sheet Across Roadway 18 50 ft 2.00% 0 0110 0 40 min Channel Through Strom Water Pipe 50.00 ft 0.50% 21.0000 0.56 min Sheet Across Sidewalks 5.00 ft 2 00% 0 0110 0 14 min BSN D4 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs ) BSN D4 0 07 BSN D4 0 12 BSN D4 0 19 BSN D4 0 22 BSN D4 0 24 BSN D4 0 26 yr Drainage Area: BSN D4 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs (hrs) (ac-ft) ac /Loss 7 83 0 0225 0 29 SBUH/SCS TYPEIA 6 mo 7 83 0 0383 0 29 SBUH/SCS TYPEIA 2 yr 7 83 0 0610 0 29 SBUH/SCS TYPEIA 10 yr 7 83 0 0726 0 29 SBUH/SCS TYPE1A 25 yr 7 83 0 0784 0 29 SBUH/SCS TYPE1A 50 yr 7 83 0 0842 0 29 SBUH/SCS TYPE1A 100 Area CN Pervious 0 0396 ac 78.00 Impervious 0 2484 ac 98.00 Total 0 2880 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description• Sheet Across Planter Stnp Impervious TC Data: Flow type Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method. SCS CN Number SCS Abs• 0 20 Intv: 10.00 min TC 0 03 hrs 0.05 hrs 0 0396 ac 01817 ac 0 0208 ac 0.0459 ac Length Slope• Coeff Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length. Slope: Coeff• Travel Time 217 00 ft 1.34% 27 0000 1 16 min 18.50 ft 2.00% 0.0110 0 40 min 80.00 ft 0.50% 21 0000 0.90 min 5.00 ft 2.00% 0.0110 0.14 min 2000ft 200% 00110 042 min ADDHYD [BSN D1] AS [6 mo] (BSN D2) AS [6 mo] TO [BSN D1 +BSN D2] Peak Flow: 0.0889 cfs Peak Time: 7.83 hrs Hyd Vol: 1259 48 cf - 0 0289 acft ADDHYD [BSN D1] AS [2 yr] [BSN D2] AS [2 yr] TO [BSN D1 +BSN D2] Peak Flow• 0 1515 cfs Peak Time. 7 83 hrs Hyd Vol• 2174.35 cf - 0.0499 acft ADDHYD [BSN D1] AS [10 yr] [BSN D2] AS [10 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 2451 cfs Peak Time 7 83 hrs Hyd Vol. 3505.77 cf - 0.0805 acft ADDHYD [BSN D1] AS [25 yr] [BSN D2] AS [25 yr] TO [BSN D1 +BSN D2] Peak Flow. 0 2930 cfs Peak Time: 7 83 hrs Hyd Vol: 4187 09 cf - 0 0961 acft ADDHYD [BSN D1] AS [50 yr] (BSN D2] AS [50 yr] TO [BSN D1 +BSN D2] Peak Flow. 0.3171 cfs Peak Time. 7.83 hrs Hyd Vol. 4530.32 cf - 0.1040 acft ADDHYD [BSN D1] AS [100 yr] [BSN D2] AS [100 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 3413 cfs Peak Time 7 83 hrs Hyd Vol: 4874 88 cf - 0 1119 acft ADDHYD [BSN D3] AS [6 mo] [BSN D4] AS [6 mo] TO [BSN D3 +BSN D4] Peak Flow• 0 1152 cfs Peak Time: 7 83 hrs Hyd Vol 1637 10 cf - 0.0376 acft ADDHYD (BSN D3] AS [2 yr] [BSN D4] AS [2 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.1948 cfs Peak Time: 7 83 hrs Hyd Vol. 2795 33 cf - 0.0642 acft ADDHYD [BSN D3] AS [10 yr] [BSN D4] AS [10 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.3107 cfs Peak Time• 7 83 hrs Hyd Vol: 4461.77 cf - 0.1024 acft ADDHYD [BSN D3] AS [25 yr] [BSN D4] AS [25 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 3694 cfs Peak Time: 7.83 hrs Hyd Vol: 5309.48 cf - 0.1219 acft ADDHYD [BSN D3] AS [50 yrJ [BSN D4) AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow• 0.3990 cfs Peak Time: 7.83 hrs Hyd Vol• 5735 63 cf - 0 1317 acft ADDHYD [BSN D3] AS [50 yr] [BSN D4] AS [50 yr] TO (BSN D3 +BSN D4] Peak Flow• 0.3990 cfs Peak Time• 7 83 hrs Hyd Vol• 5735 63 cf - 0.1317 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.4286 cfs Peak Time: 7 83 hrs Hyd Vol: 6163.00 cf - 0.1415 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow 0 4286 cfs Peak Time. 7 83 hrs Hyd Vol 6163 00 cf - 0 1415 acft ADDHYD [BSN D1 +BSN D2] AS [6 mo] [BSN D3 +BSN D4] AS (6 mo] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow: 0.2041 cfs Peak Time 7.83 hrs Hyd Vol. 2896.58 cf - 0 0605 acft ADDHYD [BSN D1 +BSN D2] AS [2 yr] [BSN D3 +BSN D4] AS [2 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow 0 3463 cfs Peak Time. 7 83 hrs Hyd Vol 4969 68 cf - 0 1141 acft ADDHYD [BSN D1 +BSN D2] AS [10 yr] [BSN D3 +BSN D4] AS [10 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0.5558 cfs Peak Time: 7 83 hrs Hyd Vol 7967 54 cf - 0 1829 acft ADDHYD [BSN D1 +BSN D2] AS [25 yr] [BSN D3 +BSN D4] AS [25 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0 6624 cfs Peak Time 7 83 hrs Hyd Vol 9496.57 cf - 0 2180 acft ADDHYD [BSN D1 +BSN D2] AS [50 yr] [BSN D3 +BSN D4] AS [50 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow: 0 7161 cfs Peak Time. 7 83 hrs Hyd Vol: 10265.95 cf - 0 2455 acft ADDHYD [BSN D1 + BSN ~D2] AS [100 yr] [BSN D3 +BSN D4] AS [100 yr] TO [BSN D1 + BSN D2 +BSN D3 +BSN D4] Peak Flow• 0 7699 cfs Peak Time 7 83 hrs Hyd Vol. 11037.88 cf - 0 2534 acft Hydrograph ID: BASIN D Area. 0 8861 ac Hyd Int 10.00 min Base Flow Peak Flow• 0 7699 cfs Peak Time 7 83 hrs Hyd Vol 0.2534 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0030 8 67 0 2898 16 33 0 1019 0 83 0 0108 8 83 0 2536 16 50 0 1019 1 00 0 0190 9 00 0 2643 16 67 0 1019 1 17 0 0283 9 17 0 2190 16.83 0 1020 1 33 0 0369 9.33 0 1910 17 00 0 1020 1 50 0 0421 9 50 0 1996 17 17 0 0976 1 67 0 0492 9 67 0 1843 17 33 0 0946 1 83 0 0550 9 83 0 1767 17 50 0 0955 2 00 0 0583 10 00 0 1791 17 67 0 0953 2 17 0 0643 10 17 0 1657 17 83 0 0954 2 33 0 0690 10 33 0 1573 18 00 0 0954 2 50 0 0711 10 50 0 1600 18 17 0 0910 2.67 0 0734 10 67 0 1506 18 33 0 0880 2 83 0 0752 10 83 0.1451 18 50 0 0889 3 00 0 0769 11 00 0 1469 18 67 0 0886 3 17 0 0783 11 17 0 1422 18 83 0 0888 3 33 0 0796 11 33 0 1395 19 00 0 0887 3 50 0 0807 11 50 0 1404 19 17 0 0843 3 67 0 0850 11 67 0 1359 19 33 0 0813 3 83 0 0883 11 83 0 1331 19 50 0 0822 4 00 0 0885 12.00 0 1341 19 67 0 0819 4 17 0 0963 12 17 0 1295 19 83 0 0821 4 33 0 1019 12 33 0 1267 20 00 0 0820 4 50 0 1014 12 50 0 1277 20 17 0 0821 4 67 - 0 1094 12 67 0 1231 20 33 0.0821 4 83 0 1149 12 83 0 1203 20 50 0 0821 5 00 0 1151 13 00 0 1212 20 67 0 0821 5 17 0.1238 13 17 0 1210 20 83 0 0822 5 33 0 1299 13 33 0 1212 21 00 0 0822 5 50 0 1297 13 50 0 1212 21 17 0 0822 5 67 0 1386 13.67 0 1169 21 33 0 0822 5 83 0 1447 13 83 0 1139 21 50 0 0822 6 00 0 1444 14 00 0 1149 21 67 0 0823 6 17 0 1611 14 17 0.1147 21 83 0 0823 6 33 0 1727 14 33 0 1148 22 00 0 0823 6 50 0 1710 14 50 0 1148 22 17 0 0778 6 67 0 1963 14 67 0 1105 22 33 0 0748 6 83 0 2136 14 83 0 1075 22 50 0 0757 7 00 0 2106 15 00 0 1085 22 67 0 0754 7 17 0 2411 15 17 0 1082 22 83 0 0755 7 33 0 2615 15 33 0.1084 23 00 0 0755 7 50 0 2578 15 50 0.1084 23 17 0 0755 7 67 0 5579 15 67 0 1040 23 33 0 0756 7 83 0 7699 15 83 0 1010 23 50 0 0756 8 00 0 7202 16 00 0 1020 23 67 0 0756 8 17 0 4934 16 17 0 1017 23 83 0 0756 8 33 0 3155 16 33 0 1019 24 00 0 0756 8 50 0 3702 16 50 0 1019 24 17 0 0261 Hydrograp h ID: BASIN D Area: 0.8861 ac Hyd Int: 10 00 min Base Flow. Peak Flow: 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol: 0 2534 acft MOVEHYD [BASIN D] TO [BASIN D - 6 mo] AS (6 mo] Peak Flow• 0 2041 cfs Peak Time: 7 83 hrs Hyd Vol: 2896 58 cf - 0 0665 acft MOVEHYD [BASIN D] TO [BASIN D - 100 yr] AS [100 yr] Peak Flow• 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol• 11037.88 cf - 0 2534 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp• Multiple Orifice Start EI Max EI Increment 327 0000 ft 333.4000 ft 0.10 Infll• 10.00 in/hr Multiplier 1.00 Reach ID: BIOSWALE D Section Properties: Shape• Ditch Routing Method: Travel Time Translation Size Material Mannings n Hyd params By Corr Metal -normal 0 0250 Mannmgs Formula Length Slope Entrance Loss 160 0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3.0000 ft 3 OOh 1 v 3.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY D 0 0000 ft 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Min Slope Max Slope Mln drop 0 5000 ft 1 0000 ft 3 0000 ft 0 5000 ft 2.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.0000 ac 0 0000 cf 0.0000 cf 0 0000 ft/s 0.0000 ft Ent Loss Exit Loss Frict Loss Start TW 0 000000 ft 0.000000 ft 0 000000 ft 0 0000 ft ROUTEHYD [BASIN D - 6 mo] THRU [BIOSWALE D] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE D 0 8861 0.2041 ---- 1 00 0 0569 Ditch 0 5681 ---- BASIN n ROUTEHYD (BASIN D -100 yr] THRU [BIOSWALE D] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE D 0 8861 0 7699 --- 1 00 0 1234 Ditch 0 8308 ----- BASIN D Node ID: INFILTRATION D Desc Manhole structure Start EI 333 4000 ft Max EI: 334 4000 ft Contrib Basin: Contrib Hyd• Length Width Void Ratio 160.0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN D RLP Desc Manhole structure Start EI 333 4000 ft Max EI: 334 4000 ft Contnb Basin: Contrib Hyd. Storage Id' INFILTRATION D Discharge Id: INFILTRATION RLPCOMPUTE [BASIN D RLP] SUMMARY 100 yr MatchO=PeakQ= 0.7699 cfs Peak Out O: 0.5081 cfs -Peak Stg: 334.10 ft - Active Vol: 1481.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin D Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 DEVELOPED LAND USE Basin Basin D Flows To Blo-Infiltration Swale D Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 RCHRES (POND) INFORMATION Pond Name: Blo-Infiltration Swale D Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. r~...,,~., ~ , ,.., Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.021 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.9 0.037 0.000 0.000 0.000 333.0 0.039 0.003 0.000 0.370 333.1 0.040 0.006 0.000 0.370 333.1 0.042 0.009 0.000 0.370 333.2 0.044 0.013 0.000 0.370 ~$'~'~gEYH D'~`~`ZP ~7" ~o~ wnsy~~ rf0 a~ co ~~ g z ~y v ~~;0 ~~~C~Y .g b n 333.3 0.046 0.016 0.000 0.370 333.4 0.047 0.020 0.000 0.370 333.4 0.049 0.023 0.411 0.370 333.5 0.051 0.027 1.873 0.370 333.6 0.053 0.031 3.920 0.370 333.7 0.055 0.036 6.416 0.370 333.8 0.057 0.040 9.292 0.370 333.8 0.058 0.044 12.50 0.370 333.9 0.060 0.049 16.01 0.370 334.0 0.062 0.054 19.81 0.370 334.1 0.064 0.059 23.86 0.370 334.1 0.066 0.064 28.15 0.370 334.2 0.068 0.069 32.67 0.370 334.3 0.069 0.074 37.42 0.370 334.4 0.071 0.080 42.37 0.370 334.5 0.073 0.085 47.53 0.370 334.5 0.075 0.091 52.88 0.370 334.6 0.077 0.097 58.41 0.370 334.7 0.079 0.103 64.13 0.370 334.8 0.081 0.109 70.02 0.370 334.8 0.083 0.116 76.08 0.370 334.9 0.085 0.122 82.31 0.370 335.0 0.086 0.129 88.70 0.370 335.1 0.088 0.136 95.24 0.370 335.2 0.090 0.142 101.9 0.370 335.2 0.092 0.150 108.8 0.370 335.3 0.094 0.157 115.8 0.370 335.4 0.096 0.164 122.9 0.370 335.5 0.098 0.172 130.2 0.370 335.5 0.100 0.179 137.6 0.370 335.6 0.102 0.187 145.2 0.370 335.7 0.104 0.195 152.9 0.370 335.8 0.106 0.204 160.7 0.370 335.9 0.108 0.212 168.6 0.370 335.9 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Ntitigated Year Predeveloped Developed 1956 0.435 0.000 1957 0.698 0.367 1958 0.401 0.000 1959 0.467 0.000 1960 0.515 0.068 1961 0.344 0.000 1962 0.369 0.000 1963 0.749 0.199 1964 0.538 0.081 1965 0.507 0.122 1966 0.356 0.000 1967 0.438 0.000 1968 0.341 0.000 1969 0.337 0.000 1970 0.336 0.000 1971 0.418 0.000 1972 0.508 0.112 1973 0.395 0.000 1974 0.460 0.048 1975 0.399 0.000 1976 0.460 0.000 1977 0.581 0.095 1978 0.494 0.060 1979 0.588 0.034 1980 0.441 0.000 1981 0.505 0.110 1982 0.583 0.081 1983 0.624 0.192 1984 0.381 0.000 1985 0.440 0.000 1986 0.492 0.115 1987 0.533 0.179 1988 0.292 0.000 1989 0.349 0.000 1990 0.689 0.296 1991 0.709 0.312 1992 0.429 0.000 1993 0.314 0.000 1994 0.349 0.000 1995 0.506 0.118 1996 0.513 0.125 1997 0.413 0.000 1998 0.579 0.080 1999 0.498 0.059 Ranked Yearly Peaks for Predeveloped and Developed-L2itigated Rank Predeveloped Developed 1 0.7086 0.3118 2 0.6983 0.2961 3 0.6887 0.1993 4 0.6239 0.1916 5 0.5878 0.1792 6 0.5828 0.1246 7 0.5813 0.1223 8 0.5793 0.1179 9 0.5382 0.1154 10 0.5326 0.1121 11 0.5146 0.1100 12 0.5132 0.0947 13 0.5075 0.0814 14 0.5072 0.0808 15 0.5056 0.0805 16 0.5051 0.0675 17 0.4975 0.0604 18 0.4938 0.0589 19 0.4918 0.0482 20 0.4675 0.0341 21 0.4604 0.0000 22 0.4603 0.0000 23 0.4408 0.0000 24 0.4403 0.0000 25 0.4382 0.0000 26 0.4353 0.0000 27 0.4288 0.0000 28 0.4181 0.0000 29 0.4135 0.0000 30 0.4008 0.0000 31 0.3989 0.0000 32 0.3954 0.0000 33 0.3811 0.0000 34 0.3692 0.0000 35 0.3556 0.0000 36 0.3492 0.0000 37 0.3491 0.0000 38 0.3442 0.0000 39 0.3412 0.0000 40 0.3367 0.0000 41 0.3362 0.0000 42 0.3142 0.0000 43 0.2918 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2290 1050 6 .0 Pass 0.2342 972 6 .0 Pass 0.2395 904 6 .0 Pass 0.2448 835 6 .0 Pass 0.2500 777 5 .0 Pass 0.2553 712 5 .0 Pass 0.2606 665 5 .0 Pass 0.2658 623 5 .0 Pass 0.2711 574 5 .0 Pass 0.2764 531 5 .0 Pass 0.2816 497 5 1.0 Pass 0.2869 459 3 .0 Pass 0.2921 422 3 .0 Pass 0.2974 389 2 .0 Pass 0.3027 356 2 .0 Pass 0.3079 338 2 .0 Pass 0.3132 312 1 .0 Pass 0.3185 296 1 .0 Pass 0.3237 275 1 .0 Pass 0.3290 255 1 .0 Pass 0.3343 236 1 .0 Pass 0.3395 219 1 .0 Pass 0.3448 199 1 .0 Pass 0.3501 184 1 .0 Pass 0.3553 172 1 .0 Pass 0.3606 166 1 .0 Pass 0.3658 161 1 .0 Pass 0.3711 153 0 .0 Pass 0.3764 146 0 .0 Pass 0.3816 143 0 .0 Pass 0.3869 138 0 .0 Pass 0.3922 134 0 .0 Pass 0.3974 122 0 .0 Pass 0.4027 116 0 .0 Pass 0.4080 110 0 .0 Pass 0.4132 101 0 .0 Pass 0.4185 97 0 .0 Pass 0.4238 90 0 .0 Pass 0.4290 86 0 .0 Pass 0.4343 79 0 .0 Pass 0.4395 73 0 .0 Pass 0.4448 69 0 .0 Pass 0.4501 63 0 .0 Pass 0.4553 60 0 .0 Pass 0.4606 58 0 .0 Pass 0.4659 54 0 .0 Pass 0.4711 49 0 .0 Pass 0.4764 47 0 .0 Pass 0.4817 45 0 .0 Pass 0.4869 42 0 .0 Pass 0.4922 37 0 .0 Pass 0.4975 36 0 .0 Pass 0.5027 32 0 .0 Pass 0.5080 28 0 .0 Pass 0.5133 26 0 .0 Pass 0.5185 24 0 .0 Pass 0.5238 23 0 .0 Pass 0.5290 20 0 .0 Pass 0.5343 18 0 .0 Pass 0.5396 16 0 .0 Pass 0.5448 16 0 .0 Pass 0.5501 16 0 .0 Pass 0.5554 16 0 .0 Pass 0.5606 15 0 .0 Pass 0.5659 13 0 .0 Pass 0.5712 12 0 .0 Pass 0.5764 12 0 .0 Pass 0.5817 11 0 .0 Pass 0.5870 9 0 .0 Pass 0.5922 8 0 .0 Pass 0.5975 8 0 .0 Pass 0.6027 8 0 .0 Pass 0.6080 8 0 .0 Pass 0.6133 7 0 .0 Pass 0.6185 6 0 .0 Pass 0.6238 6 0 .0 Pass 0.6291 5 0 .0 Pass 0.6343 5 0 .0 Pass 0.6396 5 0 .0 Pass 0.6449 5 0 .0 Pass 0.6501 5 0 .0 Pass 0.6554 5 0 .0 Pass 0.6607 5 0 .0 Pass 0.6659 5 0 .0 Pass 0.6712 5 0 .0 Pass 0.6764 5 0 .0 Pass 0.6817 5 0 .0 Pass 0.6870 5 0 .0 Pass 0.6922 4 0 .0 Pass 0.6975 4 0 .0 Pass 0.7028 2 0 .0 Pass 0.7080 2 0 .0 Pass 0.7133 1 0 .0 Pass 0.7186 1 0 .0 Pass 0.7238 1 0 .0 Pass 0.7291 1 0 .0 Pass 0.7344 1 0 .0 Pass 0.7396 1 0 .0 Pass 0.7449 1 0 .0 Pass 0.7502 0 0 .0 Pass Water Quality SMP Flow and Volume. On-line facility volume: 0.239 acre-feet On-line facility target flow: 0.25 cfs. Adjusted for 15 m1n: 0.28 cfs. Off-line facility target flow: 0 14 cfs. Adjusted for 15 min. 0.16 cfs. program and accompanying documentau on as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied o-rarranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any aamages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. reap Flow t~ 100 8029 °----_--°. 50 7502 25 6960 10 6247 5 5583 2 4579 Yearly Peaks for Predeveloped 'FEAR FLOwtcts? 100 8029 _ >>, 5a lso2 -----------~ , 25 6964 ---'?~-- ~ ~ ~ 1 ~10 .s207 5 SSS~ ~ ~: ~ ~ 2 4579 ~-,~-~' ~ ` ; ~ ;~~ ~ ~ ~~ a ~~ ~{ p ~1 it ~~ , ~ ~ ~ ~ . +~ i£ arty Peaks for developed W/O Pond 'FEAR FLOW ice) 140 t1 38 ---- 50 7 701 25 5045 10 26$1 °°.'~." `.`°' ~. 5 1518 `1, 2 5459 1Q0 xxxxxxxxxxx>aaooox~x ~+~- 1.0 v 0040 ~ Oa d ~ oagpa xk o Nedeealaped ~ 10E_1 ~~~De+tebped Mltlgatgd U _~ d X 10E2 1 10 20 30 40 50 68 70 80 4® 9~ Cumulative Probability Flew Freauencv Chart 0.75 n.Rrrd~eare~ped--_.._ .~ . ~~__.~ C ~ _._______._~x Developed w~ Fer~iitp 062 _.. __ _.~_ .~..... ~a_.. ~.~...___.......~~..~...~_...__ ~ o ~ __._.____~„~ ___ _ ____._~_. ~ 0.?3 --- -__ ________..~. ~{.___ __ _ _ _.. _ .~ t0 H 10f-~ ~ 10E-4 10E•3 10f•2 10E~1 1 10 Percent Exceeding Duration Graph early Peaks for Developed W/Pond ;~, }, , CLEARHIS BSN D1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event (cfs) (hrs) (ac-ft) ac /Loss BSN D1 0 04 7 83 0 0138 0 19 SBUH/SCS TYPE1A 6 mo BSN D1 0 07 7 83 0 0239 0 19 SBUH/SCS TYPEIA 2 yr BSN D1 0 12 7 83 0 0385 0 19 SBUH/SCS TYPEIA 10 yr BSN D1 0.14 7 83 0 0460 0 19 SBUH/SCS TYPEIA 25 yr BSN D1 0 15 7 83 0 0498 0 19 SBUH/SCS TYPE1A 50 yr BSN D1 0 16 7 83 0.0536 0 19 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN D1 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor: 484 00 SCS Abs: 0 20 Storm Dur 24 00 hrs Inty: 10.00 min Area CN TC Pervious 0 0411 ac 78.00 0 03 hrs Impervious 0.1502 ac 98.00 0.03 hrs Total 0.1913 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0411 ac Impervious CN Data: ROADWAY 98.00 0.0802 ac SIDWALK 98.00 0 0241 ac DRIVEWAY 98 00 0 0459 ac Pervious TC Data: Flow type' Description: Length: Slope Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type Description• Length: Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 195.00 ft 2.35% 27 0000 0 79 min Sheet Across Roadway 18.50 ft 2.00% 0 0110 0.40 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20.00 ft 2.00% 0 0110 0 42 min BSN D2 Event Summary: BasinlD Peak Q Peak T Peak Vol Are a Method Ramtype Event (cfs) (hrs) (ac-ft) ac /Loss BSN D2 0 05 7 83 0 0151 0 21 SBUHlSCS TYPEIA 6 mo BSN D2 0 08 7 83 0 0260 0 21 SBUH/SCS TYPEIA 2 yr BSN D2 0 13 7 83 0 0420 0 21 SBUH/SCS TYPEIA 10 yr BSN D2 0 15 7 83 0.0501 0 21 SBUH/SCS TYPEIA 25 yr BSN D2 0 16 7 83 0 0542 0 21 SBUH/SCS TYPEIA 50 yr BSN D2 0 18 7 83 0 0583 0 21 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN D2 Hyd Method: SBUH Hyd Loss Method SCS CN Numb er Peak Factor 484 00 SCS Abs 0.20 Storm Dur• 24 00 hrs Intv: 10 00 min Area CN TC Pervious 0 0425 ac 78.00 0 03 hrs Impervious 0.1645 ac 98 00 0.05 hrs Total 0 2070 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0 0425 ac Impervious CN Data: ROADWAY 98 00 0.0971 ac SIDWALK 98.00 0 0215 ac DRIVEWAY 98 00 0 0459 ac Pervious TC Data: Flow type: Description: Length• Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description: Length• Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 250.00 ft 1.18% 27 0000 1.42 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 50.00 ft 0 50% 21 0000 0.56 min Sheet Across Sidewalks 5.00 ft 2.00% 0.0110 0 14 min Sheet Across Driveway 20 00 ft 2 00% 0.0110 0.42 min BSN D3 Event Summary: BasmlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN D3 0 05 7 83 0 0151 0 20 SBUH/SCS TYPE1A 6 mo BSN D3 0 08 7 83 0.0258 0 20 SBUH/SCS TYPEIA 2 yr BSN D3 0 12 7 83 0 0414 0 20 SBUH/SCS TYPEIA 10 yr BSN D3 0 15 7 83 0 0493 0 20 SBUH/SCS TYPEIA 25 yr BSN D3 0 16 7 83 0 0533 0 20 SBUH/SCS TYPE1A 50 yr BSN D3 0 17 7 83 0 0573 0 20 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN D3 Hyd Method: SBUH Hyd Loss Method. SC S CN Number Peak Factor 484.00 SCS Abs 0 2 0 Storm Dur: 24 00 hrs Intv• 10. 00 min Area CN TC Pervious 0 0345 ac 78.00 0.03 hrs Impervious 0.1653 ac 98 00 0.06 hrs Total 0 1998 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0.0345 ac Impervious CN Data: DRIVEWAY 98.00 0 0574 ac SIDWALK 98.00 0 0255 ac ROADWAY 98 00 0 0824 ac Pervious TC Data: Flow type. Description: Length: Slope. Coeff Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type. Description Length: Slope: Coeff Travel Time Shallow Along Flow Line of Gutter 197 00 ft 0.50% 27.0000 2 28 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0.40 min Channel Through Strom Wa ter Pipe 50 00 ft 0 50% 21 0000 0 56 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min BSN D4 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) BSN D4 0 07 BSN D4 0 12 BSN D4 0 19 BSN D4 0 22 BSN D4 0 24 BSN D4 0 26 yr Drainage Area: BSN D4 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur. 24 00 hrs (hrs) (ac-ft) ac /Loss 7 83 0 0225 0 29 SBUH/SCS TYPE1A 6 mo 7 83 0.0383 0 29 SBUH/SCS TYPEIA 2 yr 7 83 0 0610 0 29 SBUH/SCS TYPE1A 10 yr 7 83 0 0726 0 29 SBUH/SCS TYPE1A 25 yr 7 83 0 0784 0 29 SBUH/SCS TYPEIA 50 yr 7 83 0 0842 0 29 SBUH/SCS TYPEIA 100 Area CN Pervious 0 0396 ac 78.00 Impervious 0 2484 ac 98.00 Total 0.2880 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Wat er Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method: SCS CN Number SCS Abs: 0 20 Intv. 10.00 min TC 0.03 hrs 0.05 hrs 0.0396 ac 0 1817 ac 0 0208 ac 0 0459 ac Length: Slope. Coeff: Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length: Slope: Coeff: Travel Time 217 00 ft 1 34% 27 0000 1.16 min 18.50 ft 2.00% 0 0110 0 40 min 80.00 ft 0.50% 21.0000 0 90 min 5 00 ft 2.00% 0.0110 0 14 min 20 00 ft 2.00% 0 0110 0.42 min ADDHYD [BSN D1] AS [6 mo] [BSN D2] AS [6 mo] TO [BSN D1 +BSN D2] Peak Flow: 0.0889 cfs Peak Time: 7 83 hrs Hyd Vol• 1259 48 cf - 0.0289 acft ADDHYD [BSN D1] AS [2 yr] [BSN D2] AS [2 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 1515 cfs Peak Time 7 83 hrs Hyd Vol• 2174 35 cf - 0 0499 acft ADDHYD [BSN D1] AS (10 yr] [BSN D2] AS (10 yr] TO [BSN D1 +BSN D2] Peak Flow 0 2451 cfs Peak Time 7 83 hrs Hyd Vol 3505.77 cf - 0 0805 acft ADDHYD [BSN D1] AS [25 yr] [BSN D2] AS [25 yr] TO [BSN D1 +BSN D2] Peak Flow. 0.2930 cfs Peak Time: 7 83 hrs Hyd Vol 4187.09 cf - 0.0961 acft ADDHYD [BSN D1] AS [50 yr] [BSN D2] AS [50 yr] TO [BSN D1 +BSN D2] Peak Flow 0 3171 cfs Peak Time: 7 83 hrs Hyd Vol 4530 32 cf - 0.1040 acft ADDHYD [BSN D1] AS [100 yr] [BSN D2] AS [100 yr] TO [BSN D1 +BSN D2] Peak Flow 0.3413 cfs Peak Time. 7 83 hrs Hyd Vol: 4874.88 cf - 0 1119 acft ADDHYD [BSN D3] AS [6 mo] [BSN D4] AS [6 mo] TO (BSN D3 +BSN D4] Peak Flow: 0 1152 cfs Peak Time: 7.83 hrs Hyd Vol. 1637 10 cf - 0 0376 acft ADDHYD (BSN D3] AS [2 yr] [BSN D4] AS [2 yr] TO [BSN D3 +BSN D4] Peak Flow• 0 1948 cfs Peak Time: 7 83 hrs Hyd Vol• 2795 33 cf - 0 0642 acft ADDHYD [BSN D3] AS (10 yr] [BSN D4] AS [10 yr] TO (BSN D3 +BSN D4] Peak Flow• 0.3107 cfs Peak Time: 7 83 hrs Hyd Vol: 4461.77 cf - 0.1024 acft ADDHYD [BSN D3] AS [25 yr] [BSN D4] AS [25 yr] TO (BSN D3 +BSN D4] Peak Flow: 0 3694 cfs Peak Time: 7 83 hrs Hyd Vol: 5309 48 cf - 0 1219 acft ADDHYD [BSN D3] AS [50 yr] [BSN D4] AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.3990 cfs Peak Time: 7 83 hrs Hyd Vol• 5735.63 cf - 0.1317 acft ADDHYD [BSN D3] AS [50 yr] [BSN D4] AS [50 yr] TO (BSN D3 +BSN D4] Peak Flow. 0.3990 cfs Peak Time: 7 83 hrs Hyd Vol. 5735.63 cf - 0 1317 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO (BSN D3 +BSN D4] Peak Flow• 0 4286 cfs Peak Time• 7 83 hrs Hyd Vol: 6163.00 cf - 0 1415 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 4286 cfs Peak Time: 7 83 hrs Hyd Vol• 6163.00 cf - 0 1415 acft ADDHYD [BSN D1 +BSN D2] AS [6 mo] [BSN D3 +BSN D4] AS [6 mo] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0.2041 cfs Peak Time. 7 83 hrs Hyd Vol• 2896 58 cf - 0 0605 acft ADDHYD [BSN D1 +BSN D2] AS [2 yr] [BSN D3 +BSN D4] AS [2 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow: 0 3463 cfs Peak Time 7 83 hrs Hyd Vol. 4969.68 cf - 0.1141 acft ADDHYD [BSN D1 +BSN D2] AS [10 yr] [BSN D3 +BSN D4] AS [10 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow. 0 5558 cfs Peak Time• 7 83 hrs Hyd Vol 7967 54 cf - 0 1829 acft ADDHYD [BSN D1 +BSN D2] AS [25 yr] [BSN D3 +BSN D4] AS [25 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow 0.6624 cfs Peak Time 7 83 hrs Hyd Vol 9496.57 cf - 0 2180 acft ADDHYD [BSN D1 +BSN D2] AS [50 yr] (BSN D3 +BSN D4] AS [50 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0.7161 cfs Peak Time. 7 83 hrs Hyd Vol. 10265.95 cf - 0.2455 acft ADDHYD [BSN D1 +BSN D2] AS [100 yrJ [BSN D3 +BSN D4] AS [100 yr] TO [BSN D1 + BSN D2 +BSN D3 +BSN D4] Peak Flow 0.7699 cfs Peak Time 7 83 hrs Hyd Vol• 11037 88 cf - 0 2534 acft Hydrograph ID: BASIN D Area 0 8861 ac Hyd Int 10 00 min Base Flow Peak Flow 0 7699 cfs Peak Time 7 83 hrs Hyd Vol: 0 2534 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0030 8 67 0 2898 16 33 0 1019 0 83 0 0108 8 83 0 2536 16 50 0.1019 1 00 0 0190 9 00 0 2643 16 67 0 1019 1 17 0 0283 9 17 0 2190 16 83 0 1020 1 33 0 0369 9 33 0 1910 17 00 0 1020 1.50 0 0421 9 50 0 1996 17 17 0 0976 1 67 0 0492 9 67 0 1843 17 33 0 0946 1 83 0 0550 9 83 0 1767 17 50 0 0955 2 00 0 0583 10.00 0 1791 17 67 0 0953 2 17 0 0643 10 17 0 1657 17 83 0 0954 2 33 0 0690 10 33 0 1573 18 00 0 0954 2 50 0 0711 10 50 0 1600 18 17 0 0910 2 67 0 0734 10 67 0 1506 18 33 0 0880 2 83 0 0752 10 83 0.1451 18 50 0 0889 3 00 0 0769 11 00 0.1469 18 67 0 0886 3 17 0 0783 11 17 0.1422 18 83 0 0888 3 33 0 0796 11 33 0 1395 19.00 0 0887 3 50 0 0807 11 50 0 1404 19 17 0 0843 3 67 0 0850 11 67 0 1359 19 33 0.0813 3 83 0 0883 11 83 0 1331 19 50 0 0822 4 00 0 0885 12 00 0 1341 19 67 0 0819 4 17 0.0963 12 17 0 1295 19 83 0 0821 4 33 0 1019 12 33 0 1267 20.00 0 0820 4 50 0 1014 12 50 0 1277 20 17 0 0821 4 67 0 1094 12 67 0 1231 20 33 0 0821 4 83 0 1149 12 83 0 1203 20 50 0 0821 5 00 0 1151 13 00 0 1212 20 67 0 0821 5 17 0 1238 13 17 0 1210 20 83 0.0822 5 33 0 1299 13 33 0 1212 21 00 0 0822 5 50 0 1297 13 50 0 1212 21 17 0 0822 5 67 0 1386 13 67 0 1169 21 33 0 0822 5 83 0 1447 13 83 0 1139 21 50 0 0822 6 00 0 1444 14 00 0 1149 21 67 0 0823 6 17 0 1611 14 17 0 1147 21 83 0 0823 6 33 0 1727 14 33 0 1148 22 00 0 0823 6 50 0.1710 14 50 0 1148 22 17 0 0778 6 67 0 1963 14 67 0 1105 22 33 0 0748 6 83 0 2136 14 83 0 1075 22 50 0 0757 7 00 0 2106 15 00 0 1085 22 67 0 0754 7 17 0 2411 15 17 0 1082 22 83 0 0755 7 33 0 2615 15 33 0 1084 23 00 0 0755 7 50 0 2578 15 50 0 1084 23 17 0 0755 7 67 0 5579 15 67 0 1040 23 33 0 0756 7 83 0 7699 15 83 0 1010 23 50 0 0756 8 00 0 7202 16 00 0.1020 23 67 0 0756 8 17 0 4934 16.17 0 1017 23 83 0 0756 8 33 0 3155 16 33 0 1019 24 00 0 0756 8 50 0 3702 16 50 0 1019 24 17 0 0261 Hydrograph ID: BASIN D Area. 0 8861 ac Hyd Int: 10 00 min Base Flow: Peak Flow 0 7699 cfs Peak Time• 7 83 hrs Hyd Vol• 0.2534 acft MOVEHYD [BASIN D] TO [BASIN D - 6 mo] AS [6 mo] Peak Flow: 0 2041 cfs Peak Time: 7.83 hrs Hyd Vol: 2896.58 cf - 0 0665 acft MOVEHYD [BASIN D] TO.[BASIN D -100 yr] AS [100 yr] Peak Flow• 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol: 11037 88 cf - 0 2534 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp• Multiple Orrflce Start EI Max EI Increment 327.0000 ft 333.4000 ft 0.10 Infll 10 00 in/hr Multlplier• 1.00 Reach ID: BIOSWALE D Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 160.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh•1v Up Node Dn Node Up Invert DUMMY D 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov 0.5000 ft 1 0000 ft 3.0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Tnb Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0 000000 ft 0 000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Manrnngs Formula ss2 3 OOh:1 v Dn Invert 0 0000 ft Mln Slope Max Slope Mln drop 0 5000 ft 2 0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN D - 6 mo] THRU (BIOSWALE D] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE D 0 8861 0 2041 ---- 1 00 0 0569 Ditch 0 5681 ---- BASIN D ROUTEHYD [BASIN D - 100 yr] THRU [BIOSWALE D] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVef fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE D 0 8861 0 7699 ---- 1 00 0 1234 Ditch 0 8308 ----- BASIN D Node ID: INFILTRATION D Desc. Manhole structure Start EI 333.4000 ft Max EI 334.4000 ft Contnb Basin: Contnb Hyd: Length Width Void Ratio 160 0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN D RLP Desc Manhole structure Start EI. 333 4000 ft Max EI: 334 4000 ft Contrib Basin: Contrib Hyd: Storage Id: INFILTRATION D Discharge Id INFILTRAT-ON RLPCOMPUTE [BASIN D RLP] SUMMARY 100 yr MatchQ=PeakQ= 0 7699 cfs Peak Out Q: 0 5081 cfs -Peak Stg: 334.10 ft - Active Vol: 1481.17 cf 7^ WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin D Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 DEVELOPED LAND USE Basin Basin D Flows To Blo-Infiltration Swale D Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 RLHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale D Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n,...e„~,...,~ Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.021 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.9 0.037 0.000 0.000 0.000 333.0 0.039 0.003 0.000 0.370 333.1 0.040 0.006 0.000 0.370 333.1 0.042 0.009 0.000 0.370 333.2 0.044 0.013 0.000 0.370 ~ o~ wHs~y~~f ~Q CO ~~ % _ ~y ~C1STE1i~~~ ~`G~ ,~ Sr0lNALY~~~ Og''!iC/ ~~ EXPtRFS:11.22- -~^~-,-- 333.3 0.046 0.016 0.000 0.370 333.4 0.047 0.020 0.000 0.370 333.4 0.049 0.023 0.411 0.370 333.5 0.051 0.027 1.873 0.370 333.6 0.053 0.031 3.920 0.370 333.7 0.055 0.036 6.416 0.370 333.8 0.057 0.040 9.292 0.370 333.8 0.058 0.044 12.50 0.370 333.9 0.060 0.049 16.01 0.370 334.0 0.062 0.054 19.81 0.370 334.1 0.064 0.059 23.86 0.370 334.1 0.066 0.064 28.15 0.370 334.2 O.Oo8 0.069 32.67 0.370 334.3 0.069 0.074 37.42 0.370 334.4 0.071 0.080 42.37 0.370 334.5 0.073 0.085 47.53 0.370 334.5 0.075 0.091 52.88 0.370 334.6 0.077 0.097 58.41 0.370 334.7 0.079 0.103 64.13 0.370 334.8 0.081 0.109 70.02 0.370 334.8 0.083 0.116 76.08 0.370 334.9 0.085 0.122 82.31 0.370 335.0 0.086 0.129 88.70 0.370 335.1 0.088 0.136 95.24 0.370 335.2 0.090 0.142 101.9 0.370 335.2 0.092 0.150 108.8 0.370 335.3 0.094 0.157 115.8 0.370 335.4 0.096 0.164 122.9 0.370 335.5 0.098 0.172 130.2 0.370 335.5 0.100 0.179 137.6 0.370 335.6 0.102 0.187 145.2 0.370 335.7 0.104 0.195 152.9 0.370 335.8 0.106 0.204 160.7 0.370 335.9 0.108 0.212 168.6 0.370 335.9 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.435 0.000 1957 0.698 0.367 1958 0.401 0.000 1959 0.467 0.000 1960 0.515 0.068 1961 0.344 0.000 1962 0.369 0.000 1963 0.749 0.199 1964 0.538 0.081 1965 0.507 0.122 1966 0.356 0.000 1967 0.438 0.000 1968 0.341 0.000 1969 0.337 0.000 1970 0.336 0.000 1971 0.418 0.000 1972 0.508 0.112 1973 0.395 0.000 1974 0.460 0.048 1975 0.399 0.000 1976 0.460 0.000 1977 0.581 0.095 1978 0.494 0.060 1979 0.588 0.034 1980 0.441 0.000 1981 0.505 0.110 1982 0.583 0.081 1983 0.624 0.192 1984 0.381 0.000 1985 0.440 0.000 1986 0.492 0.115 1987 0.533 0.179 1988 0.292 0.000 1989 0.349 0.000 1990 0.689 0.296 1991 0.709 0.312 1992 0.429 0.000 1993 0.314 0.000 1994 0.349 0.000 1995 0.506 0.118 1996 0.513 0.125 1997 0.413 0.000 1998 0.579 0.080 1999 0.498 0.059 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7086 0.3118 2 0.6983 0.2961 3 0.6887 0.1993 4 0.6239 0.1916 5 0.5878 0.1792 6 0.5828 0.1246 7 0.5813 0.1223 8 0.5793 0.1179 9 0.5382 0.1154 10 0.5326 0.1121 11 0.5146 0.1100 12 0.5132 0.0947 13 0.5075 0.0814 14 0.5072 0.0808 15 0.5056 0.0805 16 0.5051 0.0675 17 0.4975 0.0604 18 0.4938 0.0589 19 0.4918 0.0482 20 0.4675 O.C341 21 0.4604 0.0000 22 0.4603 0.0000 23 0.4408 0.0000 24 0.4403 0.0000 25 0.4382 0.0000 26 0.4353 0.0000 27 0.4288 0.0000 28 0.4181 0.0000 29 0.4135 0.0000 30 0.4008 0.0000 31 0.3989 0.0000 32 0.3954 0.0000 33 0.3811 0.0000 34 0.3692 0.0000 35 0.3556 0.0000 36 0.3492 0.0000 37 0.3491 0.0000 38 0.3442 0.0000 39 0.3412 0.0000 40 0.3367 0.0000 41 0.3362 0.0000 42 0.3142 0.0000 43 0.2918 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2290 1050 6 .0 Pass 0.2342 972 6 .0 Pass 0.2395 904 6 .0 Pass 0.2448 835 6 .0 Pass 0.2500 777 5 .0 Pass 0.2553 712 5 .0 Pass 0.2606 665 5 .0 Pass 0.2658 623 5 .0 Pass 0.2711 574 5 .0 Pass 0.2764 531 5 .0 Pass 0.2816 497 5 1.0 Pass 0.2869 459 3 .0 Pass 0.2921 422 3 .0 Pass 0.2974 389 2 .0 Pass 0.3027 356 2 .0 Pass 0.3079 338 2 .0 Pass 0.3132 312 1 .0 Pass 0.3185 296 1 .0 Pass 0.3237 275 1 .0 Pass 0.3290 255 1 .0 Pass 0.3343 236 1 .0 Pass 0.3395 219 1 .0 Pass 0.3448 199 1 .0 Pass 0.3501 184 1 .0 Pass 0.3553 172 1 .0 Pass 0.3606 166 1 .0 Pass 0.3658 161 1 .0 Pass 0.3711 153 0 .0 Pass 0.3764 146 0 .0 Pass 0.3816 143 0 .0 Pass 0.3869 138 0 .0 Pass 0.3922 134 0 .0 Pass 0.3974 122 0 .0 Pass 0.4027 116 0 .0 Pass 0.4080 110 0 .0 Pass 0.4132 101 0 .0 Pass 0.4185 97 0 .0 Pass 0.4238 90 0 .0 Pass 0.4290 86 0 .0 Pass 0.4343 79 0 .0 Pass 0.4395 73 0 .0 Pass 0.4448 69 0 .0 Pass 0.4501 63 0 .0 Pass 0.4553 60 0 .0 Pass 0.4606 58 0 .0 Pass 0.4659 54 0 .0 Pass 0.4711 49 0 .0 Pass 0.4764 47 0 .0 Pass 0.4817 45 0 .0 Pass 0.4869 42 0 .0 Pass 0.4922 37 0 .0 Pass 0.4975 36 0 .0 Pass 0.5027 32 0 .0 Pass 0.5080 28 0 .0 Pass 0.5133 26 0 .0 Pass 0.5185 24 0 .0 Pass 0.5238 23 0 .0 Pass 0.5290 20 0 .0 Pass 0.5343 18 0 .0 Pass 0.5396 16 0 .0 Pass 0.5448 16 0 .0 Pass 0.5501 16 0 .0 Pass 0.5554 16 0 .0 Pass 0.5606 15 0 .0 Pass 0.5659 13 0 .0 Pass 0.5712 12 0 .0 Pass 0.5764 12 0 .0 Pass 0.5817 11 0 .0 Pass 0.5870 9 0 .0 Pass 0.5922 8 0 .0 Pass 0.5975 8 0 .0 Pass 0.6027 8 0 .0 Pass 0.6080 8 0 .0 Pass 0.6133 7 0 .0 Pass 0.6185 6 0 .0 Pass 0.6238 6 0 .0 Pass 0.6291 5 0 .0 Pass 0.6343 5 0 .0 Pass 0.6396 5 0 .0 Pass 0.6449 5 0 .0 Pass 0.6501 5 0 .0 Pass 0.6554 5 0 .0 Pass 0.6607 5 0 .0 Pass 0.6659 5 0 .0 Pass 0.6712 5 0 .0 Pass 0.6764 5 0 .0 Pass 0.6817 5 0 .0 Pass 0.6870 5 0 .0 Pass 0.6922 4 0 .0 Pass 0.6975 4 0 .0 Pass 0.7028 2 0 .0 Pass 0.7080 2 0 .0 Pass 0.7133 1 0 .0 Pass 0.7186 1 0 .0 Pass 0.7238 1 0 .0 Pass 0.7291 1 0 .0 Pass 0.7344 1 0 .0 Pass 0.7396 1 0 .0 Pass 0.7449 1 0 .0 Pass 0.7502 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.239 acre-feet On-line facility target flow: 0.25 cfs. Adjusted for 15 min: 0.28 cfs. Off-line facility target flow: 0.14 cfs. Adjusted for 15 min: 0 16 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardinc the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Stat Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology nas been advised of the possibility of such damages. YEAR t`LOW(dS) 100 8029 .----- 10.0 xkkkxxxxxkx>oa©oo 50 .7502 , 25 6960 w 1A 10 6207 ~ o~ooaoaoa 5 5583 ~ Qaoo~ xk ~ 0 PredeE.siepEd = 10E-1 ~[~Ele~felbjtEd Mrt~gated 2 4579 , °°` v x d ~oE,~ ' ' 1 10 20 30 ~4D 50 fig 7® 80 9® 99 Cumulative Probabil' Yearly Peaks for Predeveloped Flow Frequency Chart TEM ;FLOW (~ __ 100 8029 - O.15 - --n-PrA.ciewe8ape~d---..-- ~_ 50 75D3 ~------~---~ , , ~~~~___~__._ ___ z Developed wr>h Fac~lit~ a 0 62 .~,. _ W w_~ ~.....~.~ ~ ... ~_ ---~~ . ~......._~._._.~. 25 6960 10 .6207 ; l ~ ~ N 049 ..._ ........~...__ ~. ~ _..._ ~,.......a...,.~.. ~.... ~ ; ~ *,. 5 5583 -~-t-- ~ U _ .___ ~....._.__ ~ ~ ,~ ~ fi ~ ~ ,~ ~ .•• 4 36 r ~ ~ ~ '~ ~~~! ~~. ~~ II ~' ~ _ ____--~~ __--a ___ ..... 2 4519 i ~ ~-~--~ ~ " ~ ~ -. 023 ~ _ __ ___ .l ~, ~ ~z~; ~~ ~ ~ t 3 , 1~•b ~ 10E-4 10E•3 10E~2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph 'FEAR FLOW (ds) 100 11 38 SD 4 7 7D1 25 5 O45 10 2.681 .~_ _ , 5 1518 , ..~ 2 5459 os~et~ `'f~~o Yearly Peaks for Developed W/Pond CLEARHIS BSN D1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN D1 0 04 7 83 BSN D1 0 07 7 83 BSN D1 0 12 7 83 BSN D1 0 14 7 83 BSN D1 0 15 7 83 BSN D1 0 16 7 83 yr Drainage Area: BSN D1 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0.0411 ac 78 00 Impervious 0 1502 ac 98.00 Total 0.1913 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Descnption~ Sheet Across Planter Strip Impervious TC Data: Flow type: Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Sheet Across Sidewalks Sheet Across Driveway BSN D2 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN D2 0 05 7 83 BSN D2 0 08 7 83 BSN D2 0 13 7 83 BSN D2 0 15 7 83 BSN D2 0 16 7 83 BSN D2 0 18 7 83 yr Drainage Area: BSN D2 Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs Area CN Pervious 0 0425 ac 78 00 Impervious 0 1645 ac 98.00 Peak Vol Area (ac-ft) ac 0.0138 0.19 0 0239 0 19 0 0385 0 19 0 0460 0 19 0 0498 0 19 0 0536 0 19 Loss Method SCS Abs: Intv: TC 0.03 hrs 0.03 hrs 0.0411 ac Method Raintype /Loss SBUH/SCS TYPE1A 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPE1A 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPEIA 100 SCS CN Number 0.20 10 00 min 0.0802 ac 0 0241 ac 0 0459 ac Length. Slope: Coeff~ Travel Time 6 00 ft 2.00% 0 2400 1 90 min Length. Slope: Coeff~ Travel Time 195.00 ft 2.35% 27.0000 0.79 min 18 50 ft 2.00% 0 0110 0.40 min 5.00 ft 2.00% 0.0110 0 14 min 20 00 ft 2.00% 0.0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0151 0 21 SBUH/SCS TYPE1A 6 mo 0.0260 0 21 SBUH/SCS TYPE1A 2 yr 0 0420 0 21 SBUH/SCS TYPEIA 10 yr 0 0501 0 21 SBUH/SCS TYPEIA 25 yr 0 0542 0 21 SBUHlSCS TYPE1A 50 yr 0.0583 0 21 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs. 0.20 Inty: 10.00 min TC 0 03 hrs 0.05 hrs Total 0 2070 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type. Description: Sheet Across Planter Strip Impervious TC Data: Flow type Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN D3 Event Summary: BasinlD Peak O Event ------- (cfs) BSN D3 0 05 BSN D3 0 08 BSN D3 0 12 BSN D3 0 15 BSN D3 0 16 BSN D3 0 17 yr 0.0425 ac 0 0971 ac 0.0215 ac 0 0459 ac Length: Slope. Coeff: Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length: Slope. Coeff. Travel Time 250.00 ft 1.18% 27 0000 1 42 min 1850 ft 200% 0.0110 040 min 50.00 ft 0.50% 21.0000 0.56 min 5.00 ft 2.00% 0 0110 0 14 min 20.00 ft 2 00% 0 0110 0.42 min Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0151 0 20 SBUH/SCS TYPE1A 6 mo 7 83 0 0258 0 20 SBUH/SCS TYPEIA 2 yr 7 83 0 0414 0 20 SBUH/SCS TYPEIA 10 yr 7 83 0 0493 0 20 SBUH/SCS TYPEIA 25 yr 7 83 0 0533 0 20 SBUH/SCS TYPEIA 50 yr 7 83 0 0573 0 20 SBUH/SCS TYPE1A 100 Drainage Area: BSN D3 Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0 0345 ac 78 00 Impervious 0.1653 ac 98.00 Total 0 1998 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: DRIVEWAY 98 00 SIDWALK 98 00 ROADWAY 98.00 Pervious TC Data: Flow type' Description: Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs• 0 20 Intv: 10 00 min TC 0 03 hrs 0 06 hrs 0 0345 ac 0.0574 ac 0 0255 ac 0.0824 ac Length Slope Coeff Travel Time 6.00 ft 2 00% 0.2400 1 90 min Length• Slope. Coeff• Travel Time 197 00 ft 0.50% 27.0000 2 28 min 1850 ft 200% 00110 040 min 50 00 ft 0 50% 21 0000 0.56 min 5 00 ft 2.00% 0.0110 0.14 min BSN D4 Event Summary: BasinlD Peak Q Event (cfs) BSN D4 0 07 BSN D4 0 12 BSN D4 0 19 BSN D4 0 22 BSN D4 0 24 BSN D4 0 26 yr Drainage Area: BSN D4 Hyd Method• SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0225 0 29 SBUH/SCS TYPEIA 6 mo 7.83 0 0383 0 29 SBUH/SCS TYPE1A 2 yr 7 83 0.0610 0 29 SBUH/SCS TYPE1A 10 yr 7 83 0 0726 0 29 SBUH/SCS TYPE1A 25 yr 7 83 0 0784 0 29 SBUH/SCS TYPEIA 50 yr 7 83 0 0842 0 29 SBUH/SCS TYPEIA 100 Area CN Pervious 0 0396 ac 78.00 Impervious 0.2484 ac 98 00 Total 0 2880 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Wat er Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method SCS CN Number SCS Abs. 0.20 Intv. 10.00 min TC 0 03 hrs 0.05 hrs 0 0396 ac 0 1817 ac 0 0208 ac 0.0459 ac Length• Slope• Coeff: Travel Time 6.00 ft 2 00% 0.2400 1.90 min Length: Slope. Coeff• Travel Time 217.00 ft 1 34% 27 0000 1.16 min 18 50 ft 2.00% 0 0110 0.40 min 80.00 ft 0.50% 21.0000 0.90 min 500 ft 2.00% 00110 0.14 min 2000 ft 200% 00110 042 min ADDHYD [BSN D1] AS [6 mo] [BSN D2] AS [6 moj TO [BSN D1 +BSN D2] Peak Flow 0.0889 cfs Peak Time: 7.83 hrs Hyd Vol. 1259.48 cf - 0 0289 acft ADDHYD [BSN D1] AS [2 yr] [BSN D2] AS [2 yr] TO [BSN D1 +BSN D2] Peak Flow• 0 1515 cfs Peak Time: 7 83 hrs Hyd Vol. 2174 35 cf - 0.0499 acft ADDHYD [BSN D1] AS [10 yr] [BSN D2] AS [10 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 2451 cfs Peak Time: 7.83 hrs Hyd Vol 3505.77 cf - 0.0805 acft ADDHYD [BSN D1] AS [25 yr] [BSN D2] AS [25 yr] TO [BSN D1 +BSN D2] Peak Flow. 0 2930 cfs Peak Time: 7 83 hrs Hyd Vol• 4187 09 cf - 0.0961 acft ADDHYD [BSN D1] AS [50 yr] [BSN DZ] AS [50 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 3171 cfs Peak Time: 7 83 hrs Hyd Vol• 4530.32 cf - 0 1040 acft ADDHYD [BSN D1] AS [100 yr] [BSN D2] AS [100 yr] TO [BSN D1 +BSN D2] Peak Flow: 0.3413 cfs Peak Time 7 83 hrs Hyd Vol. 4874 88 cf - 0.1119 acft ADDHYD [BSN D3] AS [6 mo] [BSN D4] AS [6 mo] TO [BSN D3 +BSN D4] Peak Flow• 0.1152 cfs Peak Time. 7 83 hrs Hyd Vol: 1637.10 cf - 0 0376 acft ADDHYD [BSN D3] AS [2 yr] [BSN D4] AS [2 yr] TO [BSN D3 +BSN D4] Peak Flow. 0.1948 cfs Peak Time: 7.83 hrs Hyd Vol• 2795.33 cf - 0 0642 acft ADDHYD (BSN D3] AS [10 yr] [BSN D4] AS [10 yr] TO [BSN D3 +BSN D4] Peak Flow• 0.3107 cfs Peak Time: 7.83 hrs Hyd Vol• 4461.77 cf - 0.1024 acft ADDHYD [BSN D3] AS [25 yr] [BSN D4] AS [25 yr] TO [BSN D3 +BSN D4] Peak Flow. 0 3694 cfs Peak Time: 7 83 hrs Hyd Vol• 5309 48 cf - 0 1219 acft ADDHYD [BSN D3] AS [50 yr] (BSN D4] AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.3990 cfs Peak Time: 7.83 hrs Hyd Vol: 5735.63 cf - 0.1317 acft ADDHYD [BSN D3] AS [50 yrJ [BSN D4] AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow 0 3990 cfs Peak Time. 7.83 hrs Hyd Vol• 5735.63 cf - 0 1317 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 4286 cfs Peak Time: 7 83 hrs Hyd Vol• 6163 00 cf - 0 1415 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow: 0.4286 cfs Peak Time 7.83 hrs Hyd Vol 6163 00 cf - 0 1415 acft ADDHYD [BSN D1 +BSN D2] AS [6 mo] [BSN D3 +BSN D4] AS [6 mo] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0 2041 cfs Peak Time. 7 83 hrs Hyd Vol 2896 58 cf - 0 0605 acft ADDHYD [BSN D1 +BSN D2] AS [2 yr] [BSN D3 +BSN D4] AS [2 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow. 0 3463 cfs Peak Time: 7 83 hrs Hyd Vol. 4969 68 cf - 0 1141 acft ADDHYD [BSN D1 +BSN D2] AS [10 yr] [BSN D3 +BSN D4] AS [10 yr] TO (BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow 0.5558 cfs Peak Time: 7.83 hrs Hyd Vol 7967.54 cf - 0 1829 acft ADDHYD [BSN D1 +BSN D2J AS [25 yr] [BSN D3 +BSN D4] AS [25 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow. 0.6624 cfs Peak Time: 7 83 hrs Hyd Vol: 9496 57 cf - 0 2180 acft ADDHYD [BSN D1 +BSN D2] AS [50 yr] [BSN D3 +BSN D4] AS [50 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow: 0.7161 cfs Peak Time. 7 83 hrs Hyd Vol 10265.95 cf - 0 2455 acft ADDHYD [BSN D1 + BSN ~DZ] AS [100 yr] [BSN D3 +BSN D4] AS [100 yr] TO [BSN D1 + BSN D2 +BSN D3 +BSN D4] Peak Flow 0 7699 cfs Peak Time• 7 83 hrs Hyd Vol 11037 88 cf - 0 2534 acft Hydrograph ID: BASIN D Area 0 8861 ac Hyd Int: 10 00 min Base Flow• Peak Flow 0.7699 cfs Peak Time 7 83 hrs Hyd Vol• 0 2534 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0030 8 67 0 2898 16 33 0 1019 0 83 0.0108 8 83 0 2536 16 50 0 1019 1 00 0 0190 9 00 0 2643 16 67 0 1019 1 17 0 0283 9 17 0 2190 16 83 0.1020 1 33 0 0369 9 33 0 1910 17 00 0 1020 1 50 0 0421 9 50 0 1996 17 17 0 0976 1 67 0 0492 9 67 0 1843 17 33 0.0946 1 83 0 0550 9 83 0 1767 17 50 0 0955 2 00 0 0583 10 00 0 1791 17 67 0 0953 2 17 0 0643 10 17 0 1657 17 83 0 0954 2 33 0 0690 10 33 0 1573 18 00 0.0954 2.50 0 0711 10 50 0 1600 18 17 0 0910 2 67 0 0734 10.67 0 1506 18 33 0.0880 2.83 0 0752 10 83 0 1451 18 50 0 0889 3 00 0 0769 11 00 0 1469 18 67 0 0886 3.17 0 0783 11 17 0 1422 18 83 0 0888 3 33 0 0796 11 33 0 1395 19 00 0 0887 3 50 0 0807 11 50 0 1404 19 17 0 0843 3.67 0 0850 11 67 0 1359 19 33 0.0813 3 83 0 0883 11 83 0 1331 19 50 0 0822 4 00 0 0885 12 00 0 1341 19 67 0 0819 4 17 0 0963 12 17 0 1295 19 83 0 0821 4 33 0 1019 12 33 0 1267 20 00 0 0820 4 50 0 1014 12 50 0 1277 20 17 0 0821 4 67 0 1094 12 67 0 1231 20 33 0 0821 4 83 0 1149 12 83 0 1203 20 50 0 0821 5 00 0 1151 13 00 0 1212 20 67 0 0821 5 17 0 1238 13 17 0 1210 20 83 0 0822 5 33 0 1299 13 33 0 1212 21 00 0 0822 5 50 0 1297 13 50 0 1212 21 17 0 0822 5 67 0 1386 13 67 0 1169 21 33 0 0822 5 83 0 1447 13.83 0 1139 21 50 0 0822 6 00 0 1444 14 00 0 1149 21 67 0 0823 6 17 0 1611 14 17 0 1147 21 83 0 0823 6 33 0 1727 14 33 0 1148 22 00 0 0823 6 50 0 1710 14 50 0 1148 22.17 0 0778 6 67 0 1963 14 67 0 1105 22 33 0 0748 6 83 0 2136 14 83 0 1075 22 50 0 0757 7 00 0 2106 15 00 0 1085 22 67 0 0754 7 17 0 2411 15 17 0 1082 22 83 0 0755 7 33 0 2615 15.33 0 1084 23 00 0 0755 7 50 0 2578 15 50 0 1084 23 17 0 0755 7 67 0 5579 15 67 0 1040 23 33 0 0756 7 83 0 7699 15 83 0 1010 23.50 0 0756 8 00 0 7202 16 00 0 1020 23 67 0 0756 8 17 0 4934 16 17 0 1017 23 83 0 0756 8 33 0 3155 16 33 0 1019 24 00 0 0756 8 50 0 3702 16 50 0 1019 24 17 0 0261 Hydrograph ID: BASIN D Area: 0 8861 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 0.7699 cfs Peak Time 7 83 hrs Hyd Vol 0 2534 acft MOVEHYD (BASIN D] TO [BASIN D - 6 mo] AS [6 mo] Peak Flow 0 2041 cfs Peak Time 7.83 hrs Hyd Vol: 2896 58 cf - 0 0665 acft MOVEHYD (BASIN D] TO,[BASIN D - 100 yr] AS [100 yr] Peak Flow: 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol: 11037.88 cf - 0 2534 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 327.0000 ft 333 4000 ft 0.10 Infil: 10.00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE D Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 160 0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3.0000 ft 3 OOh:1 v Up Node Dn Node Up Invert DUMMY D 0 0000 ft Conduit Constraints: Min Vel Max Vel Mln Cov 0 5000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0.0000 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0.000000 ft 0 000000 ft Routing Method: Travel Tlme Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh 1v Dn Invert 0 0000 ft Mln Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN D - 6 mo] THRU [BIOSWALE DJ USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fl/el CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE D 0 8861 0 2041 ---- 1 00 0 0569 Ditch 0 5681 -- BASIN D ROUTEHYD [BASIN D -100 yr] THRU [BIOSWALE D] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE D 0 8861 0 7699 ---- 1 00 0 1234 Ditch 0 8308 ----- BASIN D Node ID: INFILTRATION D Desc: Manhole structure Start EI~ 333 4000 ft Max EI 334 4000 ft Contrib Basin: Contrib Hyd. Length Width Void Ratio 160 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN D RLP Desc: Manhole structure Start EI 333.4000 ft Max EI~ 334 4000 ft Contrib Basin: Contrib Hyd: Storage Id: INFILTRATION D Discharge Id: INFILTRATION RLPCOMPUTE [BASIN D RLP] SUMMARY 100 yr MatchQ=PeakQ= 0.7699 cfs Peak Out O: 0.5081 cfs -Peak Stg: 334.10 ft - Active Vol• 1481.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin D Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 DEVELOPED LAND USE Basin Basin D Flows To Bio-Infiltration Swale D Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.71 IMPERVIOUS: 1.82 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltratlon Swale D Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 ' Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.9 0.037 0.000 0.000 0.000 333.0 0.039 0.003 0.000 0.370 333.1 0.040 0.006 0.000 0.370 333.1 0.042 0.009 0.000 0.370 333.2 0.044 0.013 0.000 0.370 ~~ ~~S~H ~-4~. ~ o~ wasy~ . ~O ~y~ ~~~ )oo ~~ 7 ~ ~ w i i t" v E~~;O ~`t~ Ai ~ ~ LY~~'~4 Qg''~~ EXPIRES: i l •2~ 333.3 0.046 0.016 0.000 0.370 333.4 0.047 0.020 0.000 0.370 333.4 0.049 0.023 0.411 0.370 333.5 0.051 0.027 1.873 0.370 333.6 0.053 0.031 3.920 0.370 333.7 0.055 0.036 6.416 0.370 333.8 0.057 0.040 9.292 0.370 333.8 0.058 0.044 12.50 0.370 333.9 0.060 0.049 16.01 0.370 334.0 0.062 0.054 19.81 0.370 334.1 0.064 0.059 23.86 0.370 334.1 0.066 0.064 28.15 0.370 334.2 0.068 0.069 32.67 0.370 334.3 0.069 0.074 37.42 0.370 334.4 0.071 0.080 42.37 0.370 334.5 0.073 0.085 47.53 0.370 334.5 0.075 0.091 52.88 0.370 334.6 0.077 0.097 58.41 0.370 334.7 0.079 0.103 64.13 0.370 334.8 0.081 0.109 70.02 0.370 334.8 0.083 0.116 76.08 0.370 334.9 0.085 0.122 82.31 0.370 335.0 0.086 0.129 88.70 0.370 335.1 0.088 0.136 95.24 0.370 335.2 0.090 0.142 101.9 0.370 335.2 0.092 0.150 108.8 0.370 335.3 0.094 0.157 115.8 0.370 335.4 0.096 0.164 122.9 0.370 335.5 0.098 0.172 130.2 0.370 335.5 0.100 0.179 137.6 0.370 335.6 0.102 0.187 145.2 0.370 335.7 0.104 0.195 152.9 0.370 335.8 0.106 0.204 160.7 0.370 335.9 0.108 0.212 168.6 0.370 335.9 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow cfs) 2 year 0.457942 5 year 0.558349 10 year 0.620682 25 year 0.696005 50 year 0.75015 100 year 0.802943 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Pera.ods for Developed Unmitigated Flow (cf s ) 0.457942 0.558349 0.620682 0.696005 0.75015 0.802943 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Ma.tigated Flow (cfs ) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.435 0.000 1957 0.698 0.367 1958 0.401 0.000 1959 0.467 0.000 1960 0.515 0.068 1961 0.344 0.000 1962 0.369 0.000 1963 0.749 0.199 1964 0.538 0.081 1965 0.507 0.122 1966 0.356 0.000 1967 0.438 0.000 1968 0.341 0.000 1969 0.337 0.000 1970 0.336 0.000 1971 0.418 0.000 1972 0.508 0.112 1973 0.395 0.000 1974 0.460 0.048 1975 0.399 0.000 1976 0.460 0.000 1977 0.581 0.095 1978 0.494 0.060 1979 0.588 0.034 1980 0._441 0.000 1981 0.505 0.110 1982 0.583 0.081 1983 0.624 0.192 1984 0.381 0.000 1985 0.440 0.000 1986 0.492 0.115 1987 0.533 0.179 1988 0.292 0.000 1989 0.349 0.000 1990 0.689 0.296 1991 0.709 0.312 1992 0.429 0.000 1993 0.314 0.000 1994 0.349 0.000 1995 0.506 0.118 1996 0.513 0.125 1997 0.413 0.000 1998 0.579 0.080 1999 0.498 0.059 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7086 0.3118 2 0.6983 0.2961 3 0.6887 0.1993 4 0.6239 0.1916 5 0.5878 0.1792 6 0.5828 0.1246 7 0.5813 0.1223 8 0.5793 0.1179 9 0.5382 0.1154 10 0.5326 0.1121 11 0.5146 0.1100 12 0.5132 0.0947 13 0.5075 0.0814 14 0.5072 0.0808 15 0.5056 0.0805 16 0.5051 0.0675 17 0.4975 0.0604 18 0.4938 0.0589 19 0.4918 0.0482 20 0.4675 0.0341 21 0.4604 0.0000 22 0.4603 0.0000 23 0.4408 0.0000 24 0.4403 0.0000 25 0.4382 0.0000 26 0.4353 0.0000 27 0.4288 0.0000 28 0.4181 0.0000 29 0.4135 0.0000 30 0.4008 0.0000 31 0.3989 0.0000 32 0.3954 0.0000 33 0.3811 0.0000 34 0.3692 0.0000 35 0.3556 0.0000 36 0.3492 0.0000 37 0.3491 0.0000 38 0.3442 0.0000 39 0.3412 0.0000 40 0.3367 0.0000 41 0.3362 0.0000 42 0.3142 0.0000 43 0.2918 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2290 1050 6 .0 Pass 0.2342 972 6 .0 Pass 0.2395 904 6 .0 Pass 0.2448 835 6 .0 Pass 0.2500 777 5 .0 Pass 0.2553 712 5 .0 Pass 0.2606 665 5 .0 Pass 0.2658 623 5 .0 Pass 0.2711 574 5 .0 Pass 0.2764 531 5 .0 Pass 0.2816 497 5 1.0 Pass 0.2869 459 3 .0 Pass 0.2921 422 3 .0 Pass 0.2974 389 2 .0 Pass 0.3027 356 2 .0 Pass 0.3079 338 2 .0 Pass 0.3132 312 1 .0 Pass 0.3185 296 1 .0 Pass 0.3237 275 1 .0 Pass 0.3290 255 1 .0 Pass 0.3343 236 1 .0 Pass 0.3395 219 1 .0 Pass 0.3448 199 1 .0 Pass 0.3501 184 1 .0 Pass 0.3553 172 1 .0 Pass 0.3606 166 1 .0 Pass 0.3658 161 1 .0 Pass 0.3711 153 0 .0 Pass 0.3764 146 0 .0 Pass 0.3816 143 0 .0 Pass 0.3869 138 0 .0 Pass 0.3922 134 0 .0 Pass 0.3974 122 0 .0 Pass 0.4027 116 0 .0 Pass 0.4080 110 0 .0 Pass 0.4132 101 0 .0 Pass 0.4185 97 0 .0 Pass 0.4238 90 0 .0 Pass 0.4290 86 0 .0 Pass 0.4343 79 0 .0 Pass 0.4395 73 0 .0 Pass 0.4448 69 0 .0 Pass 0.4501 63 0 .0 Pass 0.4553 60 0 .0 Pass 0.4606 58 0 .0 Pass 0.4659 54 0 .0 Pass 0.4711 49 0 .0 Pass 0.4764 47 0 .0 Pass 0.4817 45 0 .0 Pass 0.4869 42 0 .0 Pass 0.4922 37 0 .0 Pass 0.4975 36 0 .0 Pass 0.5027 32 0 .0 Pass 0.5080 28 0 .0 Pass 0.5133 26 0 .0 Pass 0.5185 24 0 .0 Pass 0.5238 23 0 .0 Pass 0.5290 20 0 .0 Pass 0.5343 18 0 .0 Pass 0.5396 16 0 .0 Pass 0.5448 16 0 .0 Pass 0.5501 16 0 .0 Pass 0.5554 16 0 .0 Pass 0.5606 15 0 .0 Pass 0.5659 13 0 .0 Pass 0.5712 12 0 .0 Pass 0.5764 12 0 .0 Pass 0.5817 11 0 .0 Pass 0.5870 9 0 .0 Pass 0.5922 8 0 .0 Pass 0.5975 8 0 .0 Pass 0.6027 8 0 .0 Pass 0.6080 8 0 .0 Pass 0.6133 7 0 .0 Pass 0.6185 6 0 .0 Pass 0.6238 6 0 .0 Pass 0.6291 5 0 .0 Pass 0.6343 5 0 .0 Pass 0.6396 5 0 .0 Pass 0.6449 5 0 .0 Pass 0.6501 5 0 .0 Pass 0.6554 5 0 .0 Pass 0.6607 5 0 .0 Pass 0.6659 5 0 .0 Pass 0.6712 5 0 .0 Pass 0.6764 5 0 .0 Pass 0.6817 5 0 .0 Pass 0.6870 5 0 .0 Pass 0.6922 4 0 .0 Pass 0.6975 4 0 .0 Pass 0.7028 2 0 .0 Pass 0.7080 2 0 .0 Pass 0.7133 1 0 .0 Pass 0.7186 1 0 .0 Pass 0.7238 1 0 .0 Pass 0.7291 1 0 .0 Pass 0.7344 1 0 .0 Pass 0.7396 1 0 .0 Pass 0.7449 1 0 .0 Pass 0.7502 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.239 acre-feet On-line facility target flow: 0 25 cfs. Adjusted for 15 min: 0.28 cfs. Off-line facility target flow: 0.14 cfs. Adjusted for 15 min: O.i6 cfs program and accompanying documentation as provided 'as-rs' without warranty of any kind. The entire risk regardinc the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Stat Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUR TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEAR 1b0 fIOW {tts) 8029 °------ ~~ ~ 1Q0 xxxxxkxxxxxx»oax~aas J SD .7502 - ~ ~ 25 ` 6'60 ~ 1.0 10 6207 °•-- , ~. ~~ooaoc 5 55$3 ~ ~ pao4a xx • ~ o Redeysleped ~ 10E-1 ,Deuetoped Mitigated 2 4579 i ~ ~; ~ ~ ~ X ~~ 10E,2 , ~ ~ ° ~ , ~ ~a zo ~ 40 3o s0 za so ~e s~ Cumulative Pr4babil' Yearly Peaks for Predeveloped Fiow Frequency Chart TEAM f10~) (ct.) 100 $029 ~. o ______ ~__~____ 0 75 ----._._~. owPrndeuaedoprct------. 50 7501 ~-- - °- ~ x Developed w~ Facility 15 .6960 --~~ ~ - - -~ 0 62 ..... ..m r.•....~.• . ..R... _ _.~ __.... ~........n..~......n..... ~4 i; 10 6207 -~ ~ ~ , _ ~ ' ~ ~~ ~ 049 ~_v m~~ _ ~. ~,m.... ~ a v. U 5 .55&3 ~. ( ~ ~ ~ V ~ ~ I ' ' _ .~.____ ____ ._~..__ _ ____.._._ .____ 4i ~~ a ~ ~ ~ ~ ~'._ ~ __ _~ . ~ ~ _ _ _____ _ _ ______~. 1 4579 ,~ ~ t ~ ~ 1 r ~ ~ 0.23 _ _•. ____... ~ '~ , ;~ , F 5 ~ ~ j , ~ _ ~ ~ ~ ~ {} ~ Y ~ [~ ~Ii+~' ~~j ~J k . ~ V 10E•5 ~ 10E•4 10E•3 10E•2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph ~ F<ow c~~ 100 11 38 50 7 701 ~ ' 15 S 045 'i 10 2.6&1 a 5 1 518 ~ ~ _ ' 1 5459 ~,8,~,,3~ early Peaks for Developed W/Pond CLEARHIS BSN D1 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN D1 0 04 7 83 BSN D1 0 07 7 83 BSN D1 0 12 7 83 BSN D1 0 14 7 83 BSN D1 0 15 7 83 BSN D1 0 16 7 83 yr Drainage Area: BSN D1 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0 0411 ac 78.00 Impervious 0.1502 ac 98.00 Total 0 1913 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Sheet Across Sidewalks Sheet Across Driveway BSN D2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN D2 0 05 7 83 BSN D2 0 08 7 83 BSN D2 0 13 7 83 BSN D2 0.15 7 83 BSN D2 0 16 7 83 BSN D2 0 18 7 83 Yr Drainage Area: BSN D2 Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs Area CN Pervious 0 0425 ac 78.00 Impervious 0 1645 ac 98 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0138 0.19 SBUH/SCS TYPE1A 6 mo 0 0239 0 19 SBUH/SCS TYPE1A 2 yr 0 0385 0.19 SBUH/SCS TYPEIA 10 yr 0 0460 0 19 SBUH/SCS TYPE1A 25 yr 0 0498 0 19 SBUH/SCS TYPEIA 50 yr 0 0536 0 19 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs: 0 20 Inty• 10.00 min TC 0 03 hrs 0 03 hrs 0 0411 ac 0.0802 ac 0 0241 ac 0 0459 ac Length: Slope. Coeff' Travel Time 6 00 ft 2.00% 0 2400 1.90 min Length: Slope Coeff• Travel Time 195 00 ft 2 35% 27 0000 0.79 min 18.50 ft 2.00 % 0.0110 0.40 m i n 5 00 ft 2.00% 0 0110 0.14 min 20.00 ft 2.00% 0 0110 0 42 min Peak Vol Are a Method Raintype (ac-ft) ac /Loss 0 0151 0 21 SBUHlSCS TYPEIA 6 mo 0 0260 0 21 SBUH/SCS TYPE1A 2 yr 0 0420 0 21 SBUH/SCS TYPEIA 10 yr 0 0501 0 21 SBUH/SCS TYPEIA 25 yr 0 0542 0 21 SBUH/SCS TYPE1A 50 yr 0 0583 0 21 SBUHlSCS TYPEIA 100 Loss Method SCS CN Number SCS Abs: 0 20 Intv• 10.00 min TC 0 03 hrs 0 05 hrs Total 0 2070 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0 0425 ac Impervious CN Data: ROADWAY 98 00 0.0971 ac SIDWALK 98 00 0.0215 ac DRIVEWAY 98 00 0 0459 ac Pervious TC Data: Flow type: Description: Length. Slope. Coeff. Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0 2400 1.90 min Impervious TC Data: Flow type. Description: Length: Slope: Coeff• Travel Time Shallow Along Flow Line of Gutter 250.00 ft 1.18% 27.0000 1 42 min Sheet Across Roadway 18.50 ft 2.00% 0 0110 0.40 min Channel Through Strom Water Pipe 50 00 ft 0.50% 21.0000 0.56 min Sheet Across Sidewalks 5.00 ft 2.00% 0 0110 0 14 min Sheet Across Driveway 20 00 ft 2.00% 0.0110 0 42 min BSN D3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event --- (cfs) (hrs) (ac-ft) ac /Loss BSN D3 0 05 7 83 0 0151 0 20 SBUH/SCS TYPE1A 6 mo BSN D3 0 08 7 83 0 0258 0 20 SBUH/SCS TYPEIA 2 yr BSN D3 0 12 7 83 0 0414 0 20 SBUH/SCS TYPEIA 10 yr BSN D3 0 15 7 83 0 0493 0 20 SBUH/SCS TYPE1A 25 yr BSN D3 0 16 7 83 0 0533 0 20 SBUH/SCS TYPEIA 50 yr BSN D3 0 17 7 83 0 0573 0 20 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN D3 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0 0345 ac 78.00 Impervious 0 1653 ac 98 00 Total 0 1998 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: DRIVEWAY 98.00 SIDWALK 98 00 ROADWAY 98 00 Pervious TC Data: Flow type: Description• Sheet Across Planter Strip Impervious TC Data: Flow type. Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0 20 Intv: 10.00 min TC 0 03 hrs 0 06 hrs 0.0345 ac 0.0574 ac 0 0255 ac 0.0824 ac Length• Slope. Coeff Travel Time 6 00 ft 2 00% 0.2400 1 90 min Length• Slope• Coeff• Travel Time 197.00 ft 0 50% 27.0000 2.28 min 1850ft 200% 00110 040 min 50 00 ft 0.50% 21.0000 0 56 min 5.OOft 200% 00110 014 min BSN D4 Event Summary: BasinlD Peak Q Event ------- (cfs) BSN D4 0 07 BSN D4 0 12 BSN D4 0 19 BSN D4 0 22 BSN D4 0 24 BSN D4 0 26 yr Drainage Area: BSN D4 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur. 24.00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0225 0 29 SBUH/SCS TYPEIA 6 mo 7 83 0.0383 0 29 SBUH/SCS TYPEIA 2 yr 7 83 0 0610 0 29 SBUH/SCS TYPE1A 10 yr 7 83 0 0726 0.29 SBUH/SCS TYPEIA 25 yr 7 83 0 0784 0 29 SBUH/SCS TYPEIA 50 yr 7 83 0 0842 0 29 SBUH/SCS TYPE1A 100 Area CN Pervious 0.0396 ac 78.00 Impervious 0 2484 ac 98.00 Total 0.2880 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description. Sheet Across Planter Strip Impervious TC Data: Flow type. Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method: SCS CN Number SCS Abs: 0 20 Intv: 10.00 min TC 0.03 hrs 0 05 hrs 0.0396 ac 0.1817 ac 0.0208 ac 0 0459 ac Length: Slope: Coeff. Travel Time 6.00 ft 2 00% 0 2400 1 90 min Length. Slope: Coeff: Travel Time 217.00 ft 1 34% 27.0000 1.16 min 18 50 ft 2.00% 0.0110 0.40 min 80 00 ft 0.50% 21.0000 0.90 min 5 00 ft 2.00% 0.0110 0.14 min 20 00 ft 2.00% 0.0110 0 42 min ADDHYD [BSN D1] AS [6 mo] (BSN D2] AS [6 mo] TO [BSN D1 +BSN D2] Peak Flow. 0 0889 cfs Peak Time: 7 83 hrs Hyd Vol: 1259 48 cf - 0.0289 acft ADDHYD [BSN D1] AS [2 yr] [BSN D2] AS [2 yr] TO [BSN D1 +BSN D2] Peak Flow: 0.1515 cfs Peak Time: 7 83 hrs Hyd Vol. 2174.35 cf - 0 0499 acft ADDHYD [BSN D1] AS [10 yr] [BSN D2] AS [10 yr] TO [BSN D1 +BSN D2] Peak Flow• 0 2451 cfs Peak Time: 7 83 hrs Hyd Vol. 3505 77 cf - 0 0805 acft ADDHYD [BSN D1] AS [25 yr] [BSN DZ] AS [25 yr] TO [BSN D1 +BSN D2] Peak Flow: 0.2930 cfs Peak Time: 7.83 hrs Hyd Vol. 4187 09 cf - 0 0961 acft ADDHYD [BSN D1] AS [50 yr] [BSN D2] AS [50 yr] TO [BSN D1 +BSN D2] Peak Flow• 0.3171 cfs Peak Time 7 83 hrs Hyd Vol 4530 32 cf - 0 1040 acft ADDHYD (BSN D1] AS [100 yr] [BSN D2] AS [100 yr] TO [BSN D1 +BSN D2] Peak Flow: 0 3413 cfs Peak Time: 7 83 hrs Hyd Vol• 4874.88 cf - 0 1119 acft ADDHYD [BSN D3] AS [6 mo] [BSN D4] AS [6 mo] TO (BSN D3 +BSN D4] Peak Flow: 0 1152 cfs Peak Time: 7 83 hrs Hyd Vol: 1637.10 cf - 0 0376 acft ADDHYD [BSN D3] AS [2 yr] [BSN D4] AS [2 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 1948 cfs Peak Time• 7 83 hrs Hyd Vol: 2795.33 cf - 0.0642 acft ADDHYD [BSN D3] AS [10 yr] [BSN D4] AS [10 yr] TO [BSN D3 +BSN D4] Peak Flow• 0.3107 cfs Peak Time. 7 83 hrs Hyd Vol. 4461 77 cf - 0 1024 acft ADDHYD [BSN D3] AS [25 yr] [BSN D4] AS [25 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 3694 cfs Peak Time. 7.83 hrs Hyd Vol: 5309 48 cf - 0 1219 acft ADDHYD [BSN D3] AS [50 yr] [BSN D4] AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow. 0 3990 cfs Peak Time: 7 83 hrs Hyd Vol. 5735.63 cf - 0.1317 acft ADDHYD [BSN D3] AS [50 yr] [BSN D4] AS [50 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 3990 cfs Peak Time: 7.83 hrs Hyd Vol: 5735.63 cf - 0 1317 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow: 0 4286 cfs Peak Time. 7 83 hrs Hyd Vol: 6163 00 cf - 0 1415 acft ADDHYD [BSN D3] AS [100 yr] [BSN D4] AS [100 yr] TO [BSN D3 +BSN D4] Peak Flow• 0.4286 cfs Peak Time: 7 83 hrs Hyd Vol 6163 00 cf - 0 1415 acft ADDHYD [BSN D1 +BSN D2] AS [6 mo] [BSN D3 +BSN D4] AS [6 mo] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow• 0 2041 cfs Peak Time. 7 83 hrs Hyd Vol: 2896 58 cf - 0 0605 acft ADDHYD (BSN D1 +BSN D2] AS [2 yr] [BSN D3 +BSN D4] AS [2 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow. 0 3463 cfs Peak Time• 7 83 hrs Hyd Vol. 4969 68 cf - 0 1141 acft ADDHYD [BSN D1 +BSN D2] AS [10 yr] [BSN D3 +BSN D4] AS [10 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow 0.5558 cfs Peak Time. 7 83 hrs Hyd Vol• 7967 54 cf - 0.1829 acft ADDHYD [BSN D1 +BSN D2] AS [25 yr] (BSN D3 +BSN D4] AS [25 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow. 0 6624 cfs Peak Time• 7.83 hrs Hyd Vol: 9496.57 cf - 0 2180 acft ADDHYD [BSN D1 +BSN D2] AS [50 yr] [BSN D3 +BSN D4] AS [50 yr] TO [BSN D1 +BSN D2 +BSN D3 +BSN D4] Peak Flow 0 7161 cfs Peak Time: 7 83 hrs Hyd Vol 10265.95 cf - 0 2455 acft ADDHYD [BSN D1 + BSN ~D2] AS [100 yr] [BSN D3 +BSN D4] AS [100 yr] TO [BSN D1 + BSN D2 +BSN D3 +BSN D4] Peak Flow• 0 7699 cfs Peak Time 7 83 hrs Hyd Vol. 11037 88 cf - 0 2534 acft Hydrograph ID: BASIN D Area' 0.8861 ac Hyd Int• 10 00 min Base Flow: Peak Flow. 0.7699 cfs Peak Time 7.83 hrs Hyd Vol 0.2534 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0030 8 67 0 2898 16 33 0 1019 0 83 0 0108 8 83 0 2536 16 50 0 1019 1 00 0 0190 9 00 0 2643 16 67 0 1019 1 17 0 0283 9 17 0 2190 16 83 0 1020 1 33 0 0369 9 33 0 1910 17 00 0.1020 1 50 0 0421 9 50 0 1996 17 17 0 0976 1 67 0 0492 9 67 0 1843 17 33 0 0946 1 83 0 0550 9 83 0 1767 17 50 0 0955 2 00 0 0583 10 00 0 1791 17 67 0 0953 2 17 0 0643 10 17 0 1657 17 83 0 0954 2 33 0 0690 10 33 0 1573 18.00 0 0954 2.50 0 0711 10 50 0 1600 18 17 0 0910 2 67 0 0734 10 67 0 1506 18 33 0 0880 2 83 0 0752 10 83 0 1451 18 50 0 0889 3 00 0 0769 11 00 0 1469 18 67 0 0886 3 17 0 0783 11 17 0 1422 18 83 0 0888 3 33 0 0796 11 33 0 1395 19 00 0 0887 3 50 0 0807 11 50 0 1404 19 17 0.0843 3 67 0 0850 11 67 0 1359 19 33 0 0813 3 83 0 0883 11 83 0 1331 19 50 0 0822 4 00 0 0885 12.00 0 1341 19 67 0 0819 4 17 0 0963 12 17 0 1295 19 83 0 0821 4 33 0 1019 12 33 0 1267 20 00 0 0820 4 50 0 1014 12 50 0 1277 20 17 0 0821 4 67 0 1094 12 67 0 1231 20 33 0 0821 4 83 0 1149 12 83 0 1203 20 50 0 0821 5 00 0 1151 13 00 0 1212 20 67 0 0821 5 17 0.1238 13 17 0 1210 20 83 0 0822 5 33 0 1299 13 33 0 1212 21 00 0 0822 5 50 0 1297 13 50 0 1212 21 17 0 0822 5 67 0 1386 13 67 0 1169 21 33 0 0822 5 83 0 1447 13 83 0 1139 21 50 0 0822 6 00 0 1444 14 00 0.1149 21 67 0 0823 6 17 0 1611 14 17 0 1147 21 83 0 0823 6 33 0 1727 14 33 0 1148 22 00 0 0823 6.50 0 1710 14 50 0 1148 22 17 0 0778 6.67 0 1963 14 67 0 1105 22 33 0 0748 6 83 0.2136 14 83 0 1075 22 50 0 0757 7 00 0 2106 15 00 0 1085 22 67 0 0754 7 17 0 2411 15 17 0 1082 22 83 0 0755 7 33 0 2615 15 33 0 1084 23 00 0 0755 7 50 0 2578 15 50 0 1084 23 17 0 0755 7 67 0 5579 15 67 0 1040 23 33 0 0756 7 83 0 7699 15 83 0 1010 23 50 0 0756 8 00 0 7202 16 00 0 1020 23 67 0 0756 8 17 0 4934 16 17 0 1017 23 83 0 0756 8 33 0 3155 16 33 0 1019 24 00 0 0756 8 50 0 3702 16 50 0 1019 24 17 0 0261 Hydrograph ID: BASIN D Area 0.8861 ac Hyd Int: 10.00 min Base Flow Peak Flow. 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol: 0 2534 acft MOVEHYD [BASIN D] TO (BASIN D - 6 mo] AS [6 mo] Peak Flow: 0 2041 cfs Peak Time 7 83 hrs Hyd Vol: 2896 58 cf - 0.0665 acft MOVEHYD [BASIN D] TO,[BASIN D - 100 yr] AS [100 yr] Peak Flow 0.7699 cfs Peak Time: 7 83 hrs Hyd Vol. 11037 88 cf - 0 2534 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 327 0000 ft 333.4000 ft 0.10 Infil: 10 00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE D Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 160.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3.OOh:1 v Up Node Dn Node Up Invert DUMMY D 0.0000 ft Conduit Constraints: Mln Vel Max Vel Min Cov 0 5000 ft 1 0000 ft 3.0000 ft In/Exfil Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3.OOh:1 v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN D - 6 mo] THRU [BIOSWALE D] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE D 0 8861 0 2041 ---- 1 00 0 0569 Ditch 0 5681 ---- BASIN D ROUTEHYD [BASIN D -100 yr] THRU [BIOSWALE D] USING THUR100Y AND (100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ftls ---------- BIOSWALE D 0 8861 0 7699 ---- 1 00 0 1234 Ditch 0 8308 ----- BASIN D Node ID: INFILTRATION D Desc: Manhole structure Start EI• 333 4000 ft Max EI• 334 4000 ft Contrib Basin• Contnb Hyd• Length Width Void Ratio 160 0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN D RLP Desc Manhole structure Start EI. 333 4000 ft Max EI. 334 4000 ft Contnb Basin• Contnb Hyd: Storage Id: INFILTRATION D Discharge Id: INFILTRATION RLPCOMPUTE [BASIN D RLP] SUMMARY 100 yr MatchO=PeakO= 0.7699 cfs Peak Out Q: 0.5081 cfs -Peak Stg• 334.10 ft - Active Vol • 1481.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precap Scale: 0.80 PREDEVELOPED LAND USE Basin Basin B Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 DEVELOPED LAND USE Basin Basin B Flows To Bio-Infiltration Swale B Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale B Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raan / Evap as not activated. n , ,~ o„ ~ , ,,,, Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.027 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.5 O.C46 0.000 0.000 0.000 334.0 0.048 0.004 0.000 0.463 334.7 0.050 0.007 0.000 0.463 334.7 0.053 0.011 0.000 0.463 334.8 0.055 0.016 0.000 0.463 ~~gEPH Dq~`~ ~1 6~p W~~t' ~ = x N vj.n-S FC~S.~ E~~,Q ~ ~ w s~ ~~:~` 09~2Oti Pt.....+.R.~. i...:~ 334.9 0.057 0.020 0.000 0.463 335.0 0.059 0.025 0.000 0.463 '335.0 0.061 0.029 0.411 0.463 335.1 0.064 0.034 1.873 0.463 335.2 0.066 0.039 3.920 0.463 335.3 0.068 0.044 6.416 0.463 335.4 0.070 0.050 9.292 0.463 335.4 0.073 0.055 12.50 0.463 335.5 0.075 0.061 16.01 0.463 335.6 0.077 0.067 19.81 0.463 335.7 0.080 0.073 23.86 0.463 335.7 0.082 0.079 28.15 0.463 335.8 0.084 0.086 32.67 0.463 335.9 0.086 0.092 37.42 0.463 336.0 0.089 0.099 42.37 0.463 336.1 0.091 0.106 47.53 0.463 336.1 0.093 0.113 52.88 0.463 336.2 0.096 0.121 58.41 0.463 336.3 0.098 0.128 64.13 0.463 336.4 0.100 0.136 70.02 0.463 336.4 0.103 0.144 76.08 0.463 336.5 0.105 0.152 82.31 0.463 336.6 0.107 0.160 88.70 0.463 336.7 0.110 0.169 95.24 0.463 336.8 0.112 0.177 101.9 0.463 336.8 0.114 0.186 108.8 0.463 336.9 0.117 0.195 115.8 0.463 337.0 0.119 0.204 122.9 0.463 337.1 0.121 0.213 130.2 0.463 337.1 0.124 0.223 137.6 0.463 337.2 0.126 0.233 145.2 0.463 337.3 0.129 0.243 152.9 0.463 337.4 0.131 0.253 160.7 0.463 337.5 0.133 0.263 168.6 0.463 337.5 0.136 0.273 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Periods for Developed Ma.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.352 0.000 1957 0.577 0.000 1958 0.331 0.000 1959 0.388 0.000 1960 0.427 0.000 1961 0.282 0.000 1962 0.306 0.000 1963 0.606 0.005 1964 0.446 0.000 1965 0.416 0.000 1966 0.295 0.000 1967 0.355 0.000 1968 0.282 0.000 1969 0.279 0.000 1970 0.279 0.000 1971 0.346 0.000 1972 0.401 0.000 1973 0.328 0.000 1974 0.382 0.000 1975 0.331 0.000 1976 0.380 0.000 1977 0.482 0.000 1978 0.410 0.000 1979 0.488 0.000 1980 0.366 0.000 1981 0.417 0.000 1982 0.484 0.000 1983 0.518 0.000 1984 0.315 0.000 1985 0.365 0.000 1986 0.404 0.000 1987 0.427 0.000 1988 0.242 0.000 1989 0.290 0.000 1990 0.569 0.000 1991 0.560 0.000 1992 0.356 0.000 1993 0.261 0.000 1994 0.290 0.000 1995 0.419 0.000 1996 0.426 0.000 1997 0.343 0.000 1998 0.481 0.000 1999 0.413 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5766 0.0000 2 0.5686 0.0000 3 0.5600 0.0000 4 0.5176 0.0000 5 0.4876 0.0000 6 0.4835 0.0000 7 0.4822 0.0000 8 0.4805 0.0000 9 0.4465 0.0000 10 0.4269 0.0000 11 0.4267 0.0000 12 0.4257 0.0000 13 0.4195 0.0000 14 0.4173 0.0000 15 0.4163 0.0000 16 0.4128 0.0000 17 0.4097 0.0000 i8 0.4041 0.0000 19 0.4014 0.0000 20 0.3878 0.0000 21' 0.3819 0.0000 22 0.3800 0.0000 23 0.3657 0.0000 24 0.3653 0.0000 25 0.3557 0.0000 26 0.3549 0.0000 27 0.3524 0.0000 28 0.3460 0.0000 29 0.3430 0.0000 30 0.3313 0.0000 31 0.3309 0.0000 32 0.3280 0.0000 33 0.3151 0.0000 34 0.3063 0.0000 35 0.2950 0.0000 36 0.2897 0.0000 37 0.2896 0.0000 38 0.2821 0.0000 39 0.2819 0.0000 40 0.2793 0.0000 41 0.2789 0.0000 42 0.2606 0.0000 43 0.2421 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1888 1058 0 .0 Pass 0.1931 983 0 .0 Pass 0.1974 921 0 .0 Pass 0.2017 855 0 .0 Pass 0.2060 799 0 .0 Pass 0.2103 722 0 .0 Pass 0.2145 677 0 .0 Pass 0.2188 633 0 .0 Pass 0.2231 589 0 .0 Pass 0.2274 544 0 .0 Pass 0.2317 508 0 .0 Pass 0.2360 466 0 .0 Pass 0.2403 440 0 .0 Pass 0.2446 407 0 .0 Pass 0.2489 374 0 .0 Pass 0.2532 344 0 .0 Pass 0.2575 319 0 .0 Pass 0.2617 302 0 .0 Pass 0.2660 282 0 .0 Pass 0.2703 259 0 .0 Pass 0.2746 241 0 .0 Pass 0.2789 228 0 .0 Pass 0.2832 206 0 .0 Pass 0.2875 193 0 .0 Pass 0.2918 180 0 .0 Pass 0.2961 170 0 .0 Pass 0.3004 163 0 .0 Pass 0.3046 158 0 .0 Pass 0.3089 150 0 .0 Pass 0.3132 143 0 .0 Pass 0.3175 140 0 .0 Pass 0.3218 137 0 .0 Pass 0.3261 127 0 .0 Pass 0.3304 117 0 .0 Pass 0.3347 111 0 .C Pass 0.3390 105 0 .0 Pass 0.3433 100 0 .0 Pass 0.3476 91 0 .0 Pass 0.3518 87 0 .0 Pass 0.3561 81 0 .0 Pass 0.3604 73 0 .0 Pass 0.3647 69 0 .0 Pass 0.3690 65 0 .0 Pass 0.3733 61 0 .0 Pass 0.3776 59 0 .0 Pass 0.3819 56 0 .0 Pass 0.3862 52 0 .0 Pass 0.3905 47 0 .0 Pass 0.3947 45 0 .0 Pass 0.3990 43 0 .0 Pass 0.4033 39 0 .0 Pass 0.4076 36 0 .0 Pass 0.4119 35 0 .0 Pass 0.4162 31 0 .0 Pass 0.4205 25 0 .0 Pass 0.4248 25 0 .0 Pass 0.4291 22 0 .0 Pass 0.4334 21 0 .0 Pass 0.4377 19 0 .0 Pass 0.4419 19 0 .0 Pass 0.4462 17 0 .0 Pass 0.4505 16 0 .0 Pass 0.4548 16 0 .0 Pass 0.4591 15 0 .0 Pass 0.4634 15 0 .0 Pass 0.4677 14 0 .0 Pass 0.4720 12 0 .0 Pass 0.4763 12 0 .0 Pass 0.4806 12 0 .0 Pass 0.4848 9 0 .0 Pass 0.4891 8 0 .0 Pass 0.4934 8 0 .0 Pass 0.4977 7 0 .0 Pass 0.5020 7 0 .0 Pass 0.5063 6 0 .0 Pass 0.5106 6 0 .0 Pass 0.5149 6 0 .0 Pass 0.5192 5 0 .0 Pass 0.5235 5 0 .0 Pass 0.5278 5 0 .0 Pass 0.5320 5 0 .0 Pass 0.5363 5 0 .0 Pass 0.5406 5 0 .0 Pass 0.5449 5 0 .0 Pass 0.5492 5 0 .0 Pass 0.5535 5 0 .0 Pass 0.5578 5 0 .0 Pass 0.5621 4 0 .0 Pass 0.5664 4 0 .0 Pass 0.5707 3 0 .0 Pass 0.5750 3 0 .0 Pass 0.5792 1 0 .0 Pass 0.5835 1 0 .0 Pass 0.5878 1 0 .0 Pass 0.5921 1 0 .0 Pass 0.5964 1 0 .0 Pass 0.6007 1 0 .0 Pass 0.6050 1 0 .0 Pass 0.6093 0 0 .0 Pass 0.6136 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.197 acre-feet On-line facility target flow: 0.2 cfs Adjusted for 15 min: 0.23 cfs. Off-line facility target flow: 0.11 cfs. Adjusted for 15 min. 0.13 cfs. program and accompanying documentation as provided 'as-is' without warranty of any k?nd. The entire risk regardin the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims ail warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (incluaing without limitation to damag for loss of business profits, loss of business information, business interruption, and the like) arising out of th user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TFJMR • FLOW 4Ms) 1Q0 100 6560 kkkkkkkkkkXk7~CCA{+M~9PMp-04~OC<kkkkkkkk?rkkk 50 6136 25 5700 ~ 1.0 10 5093 V 5 4589 ' ~ ~ "~ ~,~~,oo~oaocoacropoa°©°a {7~ ~ ppaap6aa 0 PtEdBV~Ed i 10E-1 x De,ueloped MitigatEd 2 3716 ,~ t~ E sA • z 10E-? ~ ' 1 10 20 ~ 40 50 60 70 80 90 99 Cumulative Pr4babil' Yearly Peaks for Predeveloped Fiow Frequency Chart TEAR FIOW (c~) ___ 100. 6560 o Predevebped 50 6136 ~ x Developed ~~ Fac,lrty 25 '5700 0 51 °._ ~...~.....~ ..~ ........~ ._ __• ~ ~....__ •~. • .. •. 10 5093 ~ D 40 ---°°.°--~---•---- -• --_-~ 5 4589 V `"~ 0 29 _ _ _ _ _ 2 3776 ~ 0.19 _ ._ _. _. ___ ~.. _ ~ _ _ _ ______ Rf L N 10E-5 ~ 10E•4 10E•3 10E-2 10E•1 1 10 Percent Exceedin ly Peaks for developed W/O Pond TEAR FIOW {cis) __ 100 11 38 SO 7701 ;, 25 f~ 5 045 10 2.6$1 ~' 5 1 S18 ' 2 5459 Duration Graph irly Peaks for Developed W/Pond CLEARHIS BSN B1 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN 61 0 12 8 00 BSN B1 0 20 8 00 BSN B1 0 32 8 00 BSN B1 0 38 8 00 BSN B1 0 41 8 00 BSN B1 0 44 8 00 yr Drainage Area: BSN B1 Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0 0451 ac 78.00 Impervious 0 4574 ac 98 00 Total 0 5025 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description Sheet Across Planter Stnp Impervious TC Data: Flow type: Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area (ac-ft) ac 0 0411 0 50 0 0694 0 50 0 1098 0 50 0 1301 0 50 0 1404 0 50 0 1506 0 50 Method Raintype /Loss SBUH/SCS TYPE1A 6 mo SBUH/SCS TYPE1A 2 yr SBUH/SCS TYPE1A 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs: 0 20 Inty• 10 00 min TC 0 03 hrs 0 09 hrs 0 0451 ac 0 2899 ac 0 1216 ac 0 0459 ac Length: Slope: Coeff• Travel Time 6.00 ft 2.00% 0.2400 1 90 min Length: Slope• Coeff• Travel Time 216 00 ft 0.50% 27.0000 2.50 min 27 00 ft 2 00% 0.0110 0.54 min 150 00 ft 0 50% 21.0000 1 68 min 12 00 ft 2 00% 0 0110 028 min 20 00 ft 2 00% 0 0110 0.42 min Hydrograph ID: BASIN B - 100 yr Area 1 1872 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 1 0176 cfs Peak Time. 8.00 hrs Hyd Vol• 0.3522 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0031 8 67 0 4317 16 50 0 1391 0 83 0 0123 8 83 0 3671 16 67 0 1391 1 00 0 0238 9 00 0 3631 16 83 0 1391 1 17 0 0369 9 17 0 3196 17 00 0 1392 1 33 0 0496 9.33 0 2758 17 17 0.1348 1 50 0 0585 9 50 0 2734 17 33 0 1303 1 67 0 0682 9 67 0 2599 17 50 0 1301 1 83 0 0771 9 83 0 2469 17 67 0 1300 2.00 0 0830 10 00 0.2463 17 83 0.1300 2 17 0 0906 10 17 0 2333 18.00 0 1301 2 33 0 0980 10 33 0 2201 18 17 0 1257 2 50 0 1021 10 50 0 2195 18.33 0 1212 2 67 0 1055 10 67 0 2107 18 50 0 1209 2 83 0 1084 10 83 0 2019 18 67 0.1209 3 00 0 1109 11 00 0 2015 18 83 0 1209 3 17 0 1130 11 17 0 1971 19 00 0 1209 3 33 0 1150 11 33 0 1928 19 17 0 1165 3 50 0 1166 11 50 0 1926 19 33 0 1120 3 67 0 1215 11 67 0 1883 19 50 0 1118 3 83 0 1266 11 83 0 1839 19 67 0 1117 4 00 0 1283 12 00 0 1838 19 83 0 1117 4 17 0 1365 12 17 0 1794 20 00 0 1117 4 33 0 1453 12 33 0 1750 20 17 0 1118 4 50 0 1472 12 50 0.1748 20 33 0 1118 4 67 0 1555 12 67 0 1704 20 50 0 1118 4 83 0 1644 12 83 0 1660 20.67 0 1118 5 00 0 1666 13 00 0 1658 20 83 0 1118 517 01754 1317 01658 2100 01118 5 33 0 1847 13 33 0 1659 21 17 0 1119 5 50 0 1867 13 50 0 1659 21 33 0 1119 5 67 0 1956 13 67 0 1616 21 50 0 1119 5 83 0 2050 13 83 0 1572 21 67 0 1119 6 00 0 2069 14 00 0 1570 21 83 0 1119 6 17 0 2236 14 17 0 1569 22 00 0 1119 6 33 0 2414 14 33 0 1570 22.17 0.1075 6 50 0 2441 14 50 0 1571 22 33 0 1030 6 67 0 2691 14 67 0 1527 22 50 0 1027 6 83 0 2957 14 83 0 1483 22 67 0 1027 7 00 0 2991 15 00 0 1481 22 83 0 1027 7 17 0 3290 15 17 0 1480 23 00 0 1027 7 33 0 3603 15 33 0 1481 23 17 0 1027 7 50 0 3642 15 50 0 1481 23 33 0 1027 7 67 0 6659 15 67 0 1437 23 50 0 1027 7 83 0 9868 15 83 0 1393 23 67 0 1027 8 00 1 0176 16 00 0 1390 23.83 0 1028 8 17 0 7756 16 17 0 1390 24 00 0 1028 8 33 0 5146 16 33 0 1390 24 17 0 0535 8 50 0 4995 16 50 0 1391 24 33 0 0047 Hydrogra ph ID: BASIN B - 100 yr Area. 1 1872 ac Hyd Int• 10.00 min Base Flow• Peak Flow: 1.0176 cfs. Peak Time 8 00 hrs Hyd Vol 0.3522 acft MOVEHYD [BASIN B] TO [ BASIN B - 6 mo] AS [6 mo] Peak Flow• 0 2821 cfs Peak Time: 8.00 hrs Hyd Vol 4152.33 cf - 0 0953 acft MOVEHYD [BASIN B] TO [ BASIN B -100 yr] AS [100 yr] Peak Flow• 1 0176 cfs Peak Time• 8.00 hrs Hyd Vol: 15341 03 cf - 0 3522 acft BSN B2 Event Summary: BasinlD Peak O Event ------- (cfs) BSN 62 0 16 BSN B2 0 27 BSN 62 0 42 BSN 62 0 50 BSN B2 0 54 BSN B2 0 58 yr Drainage Area: BSN B2 Hyd Method. SBUH Hyd Peak Factor 484 00 Storm Dur: 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0542 0 68 SBUH/SCS TYPEIA 6 mo 8 00 0 0921 0 68 SBUH/SCS TYPEIA 2 yr 8 00 0.1464 0 68 SBUH/SCS TYPE1A 10 yr 8 00 0 1739 0 68 SBUH/SCS TYPEIA 25 yr 8 00 0 1877 0 68 SBUH/SCS TYPEIA 50 yr 8 00 0 2016 0 68 SBUH/SCS TYPEIA 100 Area CN Pervious 0 0846 ac 78.00 Impervious 0 6001 ac 98 00 Total 0 6847 ac Supporting Data: Pervious CN Data: Type B Soils Hydraulic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type• Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method SCS CN Number SCS Abs: 0 20 Intv: 10 00 min TC 0 03 hrs 0.11 hrs 0.0846 ac 0.3774 ac 0 1653 ac 0 0574 ac Length Slope Coeff. Travel Time 6 00 ft 2.00% 0 2400 1 90 min Length. Slope: Coeff Travel Time 304 00 ft 0 50% 27.0000 3.52 min 27.00 ft 2 00% 0 0110 0 54 min 150.00 ft 0.50% 21 0000 1 68 min 12.OOft 200% 0.0110 028 min 20 00 ft 2 00% 0 0110 0 42 min ADDHYD [BSN B1] AS [6 mo] [BSN 62] AS [6 mo] TO (BSN 61 t BSN B2] Peak Flow• 0 2821 cfs Peak Time: 8.00 hrs Hyd Vol 4152 33 cf - 0 0953 acft ADDHYD [BSN B1] AS [2 yr] [BSN 62] AS [2 yr] TO [BSN B1 +BSN B2] Peak Flow• 0.4738 cfs Peak Time. 8.00 hrs Hyd Vol 7038.64 cf - 0 1616 acft ADDHYD [BSN 61] AS [10 yr] (BSN B2] AS [10 yr] TO (BSN B1 +BSN 62] Peak Flow 0 7446 cfs Peak Time: 8 00 hrs Hyd Vol 11157 57 cf - 0 2561 acft ADDHYD [BSN B1] AS [25 yr] [BSN B2] AS [25 yr] TO [BSN 61 +BSN B2] Peak Flow. 0 8809 cfs ,Peak Time. 8 00 hrs Hyd Vol• 13244 07 cf - 0 3040 acft ADDHYD [BSN 61] AS [50 yr] [BSN B2] AS [50 yr] TO [BSN B1 +BSN 62] Peak Flow 0.9492 cfs Peak Time: 8 00 hrs Hyd Vol 14291 34 cf - 0.3281 acft ADDHYD [BSN B1] AS [100 yr] [BSN 62] AS [100 yr] TO [BSN 61 +BSN B2] Peak Flow 1 0176 cfs Peak Time 8 00 hrs Hyd Vol- 15341 03 cf - 0 3522 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip~ Multiple Orifice Start EI Max EI Increment 329 0000 ft 335 0000 ft 0.10 Infil 10.00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE B Section Properties: Shape. Ditch Size Material Manning n Corr Metal -n ormal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3.OOh:1 v Up Node Dn Node Up Invert DUMMY B 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0 5000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0 000000 ft 0 000000 ft Routing Method. Travel Time Translation Hyd params By 0.0250 Manning n Formula ss2 3.OOh.1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0 5000 ft 2.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN B - 6 mo] THRU [BIOSWALE B] USING THUR100Y AND (6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 0 2821 ---- 1 00 0 0787 Ditch 0 5724 ----- BASIN B ROUTEHYD [BASIN B - 100 yr] THRU (BIOSWALE B] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 1 0176 ---- 1 00 0 1703 Ditch 0 8771 ---- BASIN B Node ID: INFILTRATION B Desc: Manhole structure Start EI• 335.0000 ft Max EI: 336 0000 ft Contnb Basin Contnb Hyd: Length Width Void Ratio 200.0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN B RLP Desc: Manhole structure Start EI• 335 0000 ft Max EI 336.0000 ft Contnb Basin: Contnb Hyd: Storage Id. INFILTRATION B Discharge Id: INFILTRATION RLPCOMPUTE [BASIN Q RLP] SUMMARY 100 yr MatchQ=PeakQ= 1 0176 cfs Peak Out Q: 0.6472 cfs -Peak Stg: 336.20 ft - Active Vol: 1871.90 cf ` WESTERN WASHINGTON HYDROLOGY MODEL V2 ~ PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin B Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 DEVELOPED LAND USE Basin Basin B Flows To Blo-Infiltration Swale B Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 RCHRES (POND) INFORMATION Pond Name: Blo-Infiltration Swale B Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Sa.de slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.5 0.046 0.000 0.000 0.000 334.6 0.048 0.004 0.000 0.463 334.7 0.050 0.007 0.000 0.463 334.7 0.053 0.011 0.000 0.463 334.8 0.055 0.016 0.000 0.463 ~~gEYH Dq,~`~ ~bOp w''SW.1. ~ , o ~ w = x ti "3.~1 s ~Y F~~~E~~~~ `~~^y'~ Est ~~`:~` 09~20~c ~r•~Krs: it.2,. ..+ 334:9 0.057 0.020 0.000 0.463 335.0 0.059 0.025 0.000 0.463 335.0 0.061 0.029 0.411 0.463 335.1 0.064 0.034 1.873 0.463 335.2 0.066 0.039 3.920 0.463 335.3 0.068 0.044 5.416 0.463 335.4 0.070 0.050 9.292 0.463 335.4 0.073 0.055 12.50 0.463 335.5 0.075 0.061 16.01 0.463 335.6 0.077 0.067 19.81 0.463 335.7 0.080 0.073 23.86 0.463 335.7 0.082 0.079 28.15 0.463 335.8 0.084 0.086 32.67 0.463 335.9 0.086 0.092 37.42 0.463 336.0 0.089 0.099 42.37 0.463 336.1 0.091 0.106 47.53 0.463 336.1 0.093 0.113 52.88 0.463 336.2 0.096 0.121 58.41 0.463 336.3 0.098 0.128 64.13 0.463 336.4 0.100 0.136 70.02 0.463 336.4 0.103 0.144 76.08 0.463 336.5 0.105 0.152 82.31 0.463 336.6 0.107 0.160 88.70 0.463 336.7 0.110 0.169 95.24 0.463 336.8 0.112 0.177 101.9 0.463 336.8 0.114 0.186 108.8 0.463 336.9 0.117 0.195 115.8 0.463 337.0 0.119 0.204 122.9 0.463 337.1 0.121 0.213 130.2 0.463 337.1 0.124 0.223 137.6 0.463 337.2 0.126 0.233 145.2 0.463 337.3 0.129 0.243 152.9 0.463 337.4 0.131 0.253 160.7 0.463 337.5 0.133 0.263 168.6 0.463 337.5 0.136 0.273 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Pera.ods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.61365 100 year 0.656013 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed ,1956 0.352 0.000 1957 0.577 0.000 1958 0.331 0.000 1959 0.388 0.000 1960 0.427 0.000 1961 0.282 0.000 1962 0.306 0.000 1963 0.606 0.005 1964 0.446 0.000 1965 0.416 0.000 1966 0.295 0.000 1967 0.355 0.000 1968 0.282 0.000 1969 0.279 0.000 1970 0.279 0.000 1971 0.346 0.000 1972 0.401 0.000 1973 0.328 0.000 1974 0.382 0.000 1975 0.331 0.000 1976 0.380 0.000 1977 0.482 0.000 1978 0.410 0.000 1979 0.488 0.000 1980 0.366 0.000 1981 0.417 0.000 1982 0.484 0.000 1983 0.518 0.000 1984 0.315 0.000 1985 0.365 0.000 1986 0.404 0.000 1987 0.427 0.000 1988 0.242 0.000 1989 0.290 0.000 1990 0.569 0.000 1991 0.560 0.000 1992 0.356 0.000 1993 0.261 0.000 1994 0.290 0.000 1995 0.419 0.000 1996 0.426 0.000 1997 0.343 0.000 1998 0.481 0.000 1999 0.413 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5766 0.0000 2 0.5686 0.0000 3 0.5600 0.0000 4 0.5176 0.0000 5 0.4876 0.0000 6 0.4835 0.0000 7 0.4822 0.0000 8 0.4805 0.0000 9 0.4465 0.0000 10 0.4269 0.0000 11 0.4267 0.0000 12 0.4257 0.0000 13 0.4195 0.0000 14 0.4173 0.0000 15 0.4163 0.0000 16 0.4128 0.0000 17 0.4097 0.0000 18 0.4041 0.0000 19 0.401a 0.0000 20 0.3878 O.000O 21 - 0.3819 0.0000 22 0.3800 0.0000 23 0.3657 0.0000 24 0.3653 0.0000 25 0.3557 0.0000 26 0.3549 0.0000 27 0.3524 0.0000 28 0.3460 0.0000 29 0.3430 0.0000 30 0.3313 0.0000 31 0.3309 0.0000 32 0.3280 0.0000 33 0.3151 0.0000 34 0.3063 0.0000 35 0.2950 0.0000 36 0.2897 0.0000 37 0.2896 0.0000 38 0.2821 0.0000 39 0.2819 0.0000 40 0.2793 0.0000 41 0.2789 0.0000 42 0.2606 0.0000 43 0.2421 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1888 1058 0 .0 Pass 0.1931 983 0 .0 Pass 0.1974 921 0 .0 Pass 0.2017 855 0 .0 Pass 0.2060 799 0 .0 Pass 0.2103 722 0 .0 Pass 0.2145 677 0 .0 Pass 0.2188 633 0 .0 Pass 0.2231 589 0 .0 Pass 0.2274 544 0 .0 Pass 0.2317 508 0 .0 Pass 0.2360 466 0 .0 Pass 0.2403 440 0 .0 Pass 0.2446 407 0 .0 Pass 0.2489 374 0 .0 Pass 0.2532 344 0 .0 Pass 0.2575 319 0 .0 Pass 0.2617 302 0 .0 Pass 0.2660 282 0 .0 Pass 0.2703 259 0 .0 Pass 0.2746 241 0 .0 Pass 0.2789 228 0 .0 Pass 0.2832 206 0 .0 Pass 0.2875 193 0 .0 Pass 0.2918 180 0 .0 Pass 0.2961 170 0 .0 Pass 0.3004 163 0 .0 Pass 0.3046 158 0 .0 Pass 0.3089 150 0 .0 Pass 0.3132 143 0 .0 Pass 0.3175 140 0 .0 Pass 0.3218 137 0 .0 Pass 0.3261 127 0 .0 Pass 0.3304 117 0 .0 Pass 0.3347 111 0 .0 Pass 0.3390 105 0 .0 Pass 0.3433 100 0 .0 Pass 0.3476 9i 0 .0 Pass 0.3518 87 0 .0 Pass 0.3561 81 0 .0 Pass 0.3604 73 0 .0 Pass 0.3647 69 0 .0 Pass 0.3690 65 0 .0 Pass 0.3'733 61 0 .0 Pass 0.3776 59 0 .0 Pass 0.3819 56 0 .0 Pass 0.3862 52 0 .0 Pass 0.3905 47 0 .0 Pass 0.3947 45 0 .0 Pass 0.3990 43 0 .0 Pass 0.4033 39 0 .0 Pass 0.4076 36 0 .0 Pass 0.4119 35 0 .0 Pass 0.4162 31 0 .0 Pass 0.4205 25 0 .0 Pass 0.4248 25 0 .0 Pass 0.4291 22 0 .0 Pass 0.4334 21 0 .0 Pass 0.4377 19 0 .0 Pass 0.4419 19 0 .0 Pass 0.4462 17 0 .0 Pass 0.4505 16 0 .0 Pass 0.4548 16 0 .0 Pass 0.4591 15 0 .0 Pass 0.4634 15 0 .0 Pass 0.4677 14 0 .0 Pass 0.4720 12 0 .0 Pass 0.4763 12 0 .0 Pass 0.4806 12 0 .0 Pass 0.4848 9 0 .0 Pass 0.4891 8 0 .0 Pass 0.4934 8 0 .0 Pass 0.4977 7 0 .0 Pass 0.5020 7 0 .0 Pass 0.5063 6 0 .0 Pass 0.5106 6 0 .0 Pass 0.5149 6 0 .0 Pass 0.5192 5 0 .0 Pass 0.5235 5 0 .0 Pass 0.5278 5 0 .0 Pass 0.5320 5 0 .0 Pass 0.5363 5 0 .0 Pass 0.5406 5 0 .0 Pass 0.5449 5 0 .0 Pass 0.5492 5 0 .0 Pass 0.5535 5 0 .0 Pass 0.5578 5 0 .0 Pass 0.5621 4 0 .0 Pass 0.5664 4 0 .0 Pass 0.5707 3 0 .0 Pass 0.5750 3 0 .0 Pass 0.5792 1 0 .0 Pass 0.5835 1 0 .0 Pass 0.5878 1 0 .0 Pass 0.5921 1 0 .0 Pass 0.5964 1 0 .0 Pass 0.6007 1 0 .0 Pass 0.6050 1 0 .0 Pass 0.6093 0 0 .0 Pass 0.6136 0 0 .0 Pass Water Quality BMP Elow and Volume. On-line facility volume: 0.197 acre-feet On-line Facility target Flow: 0.2 cfs. Adjusted for 15 min: 0.23 cfs. Off-line facility target flow: 0.11 cfs. Adjusted for 15 min: 0.13 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardin< the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Stat Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEAR 104 FLDW (tfs) 6560 ---~-- - 1aD }e~CkkxkkkknkkY+kXSt~{-03P~A3DG9004ckkkXkkkkkkk}~ 50 6136 25 5740 .-. ~ 1.D 10 5099 U 5 4589 ~ '°6o~°`x~`~rioo4~4 ~ ooaoc>ooac~ D PfEdEVEIOpEd 1QE-1 x DEitEIOpEd MitigatEd 2 3776 ,= U € ~_ 10E2 1 10 20 ~D d0 30 60 70 80 9D 9~ Cumulative Pr©babili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR FIDW (cf.) 104 6560 ----°--- o Predet+ehoped 54 61;5 ~---~-~-~-~ ~ ~ ~ ~ x Developed w~h facility ?5 5700 -~' 'i ; , ~ ~j 0 51 .__ _.~ .....~a r ~_ . ~.m...._.~..W.. .~. . 10 5093 p -~""""_ i ~ (} ~ 040 ~.~...~.....m_.~..._.. _~__-.~._... t ' ' t, ( ~ U 5 9589 F '~ t ~ ~, ' ~' ~ ~ ~~ `'' 429 ____-___ _.._ _ ._ __.__. ~~ ~ t,`~ r t~ 2 3776 l~ t ~ ~ r ~ ,~ ~ ,~ ~ ~ ~ 0.19 - ___ ~_ _ _ _ __ }} ~~ A~ _N " ~ ~ ~ > > 1~-5 ~ 10E~d 10E•3 t0E~2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph TF,i~R FLOtq (cfs) 100 11 38 50 77111 ~~~ 25 5 445 , 14 2 681 '-"""'°~.""""_' _ , 5 1 518 „€ 2 5459 early Peaks for Developed W/Pond CLEARHIS BSN B1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN 61 0 12 8 00 BSN B1 0 20 8 00 BSN B1 0 32 8 00 BSN 61 0 38 8 00 BSN 61 0 41 8 00 BSN B1 0 44 8 00 yr Drainage Area: BSN B1 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0.0451 ac 78.00 Impervious 0 4574 ac 98 00 Total 0 5025 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type• Description Sheet Across Planter Strip Impervious TC Data: Flow type• Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Wat er Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0411 0 50 SBUH/SCS TYPEIA 6 mo 0 0694 0 50 SBUH/SCS TYPE1A 2 yr 0 1098 0.50 SBUH/SCS TYPE1A 10 yr 0 1301 0 50 SBUH/SCS TYPE1A 25 yr 0 1404 0 50 SBUH/SCS TYPEIA 50 yr 0 1506 0 50 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs: 0.20 Intv: 10 00 min TC 0.03 hrs 0.09 hrs 0 0451 ac 0 2899 ac 0 1216 ac 0.0459 ac Length Slope• Coeff Travel Time 6 00 ft 2.00% 0 2400 1 90 min Length: Slope: Coeff• Travel Time 216 00 ft 0 50% 27 0000 2 50 min 27.00 ft 2.00% 0.0110 0 54 min 150 00 ft 0.50% 21.0000 1.68 min 12 00 ft 2.00% 0 0110 0.28 min 20 00 ft 2.00% 0.0110 0 42 min Hydrograph ID: BASIN B - 100 yr Area. 1 1872 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 1.0176 cfs Peak Time. 8 00 hrs Hyd Vol: 0.3522 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0031 8 67 0 4317 16.50 0 1391 0 83 0 0123 8 83 0 3671 16 67 0 1391 1 00 0 0238 9 00 0 3631 16 83 0 1391 1 17 0 0369 9 17 0 3196 17 00 0 1392 1 33 0 0496 9 33 0 2758 17 17 0 1348 1 50 0 0585 9 50 0 2734 17 33 0 1303 1 67 0 0682 9 67 0 2599 17.50 0 1301 1 83 0 0771 9 83 0 2469 17 67 0 1300 2 00 0 0830 10 00 0 2463 17 83 0 1300 2 17 0 0906 10 17 0 2333 18 00 0 1301 2 33 0 0980 10 33 0 2201 18 17 0 1257 2 50 0 1021 10 50 0 2195 18 33 0 1212 2.67 0 1055 10 67 0 2107 18 50 0 1209 2 83 0 1084 10 83 0 2019 18 67 0 1209 3 00 0 1109 11 00 0 2015 18 83 0 1209 3 17 0 1130 11 17 0 1971 19 00 0 1209 3 33 0 1150 11 33 0 1928 19 17 0 1165 3 50 ~ 0 1166 11 50 0 1926 19 33 0 1120 3 67 0 1215 11 67 0 1883 19 50 0 1118 3 83 0 1266 11 83 0 1839 19 67 0 1117 4 00 0 1283 12 00 0 1838 19 83 0 1117 417 01365 12.17 01794 20.00 01117 4 33 0 1453 12 33 0 1750 20 17 0 1118 4 50 0 1472 12 50 0 1748 20 33 0 1118 4 67 0 1555 12 67 0 1704 20 50 0 1118 4 83 0 1644 12 83 0 1660 20 67 0 1118 5 00 0 1666 13 00 0 1658 20 83 0 1118 517 01754 13.17 01658 2100 01118 5 33 0 1847 13 33 0 1659 21 17 0.1119 5 50 0.1867 13 50 0 1659 21 33 0 1119 5 67 0 1956 13 67 0 1616 21 50 0 1119 5 83 0 2050 13 83 0 1572 21 67 0 1119 6 00 0 2069 14 00 0.1570 21 83 0 1119 6 17 0 2236 14 17 0 1569 22 00 0 1119 6 33 0 2414 14 33 0 1570 22 17 0 1075 6 50 0 2441 14 50 0 1571 22 33 0 1030 6 67 0 2691 14 67 0 1527 22 50 0 1027 6 83 0 2957 14 83 0 1483 22 67 0 1027 7 00 0 2991 15 00 0 1481 22 83 0 1027 7 17 0 3290 15 17 0 1480 23 00 0 1027 7 33 0 3603 15 33 0 1481 23 17 0 1027 7 50 0 3642 15 50 0 1481 23 33 0 1027 7 67 0 6659 15 67 0 1437 23 50 0 1027 7 83 0 9868 15 83 0 1393 23 67 0 1027 8 00 1 0176 16 00 0 1390 23 83 0 1028 8 17 0 7756 16 17 0 1390 24 00 0 1028 8 33 0 5146 16 33 0 1390 24 17 0 0535 8 50 0 4995 16 50 0 1391 24 33 0 0047 Hydrogra ph ID: BASIN B - 100 yr Area• 1 1872 ac Hyd Int• 10.00 min Base Flow• Peak Flow• 1 0176 cfs. Peak Time• 8 00 hrs Hyd Vol: 0 3522 acft MOVEHYD [BASIN B] TO [ BASIN B - 6 mo] AS [6 mo] Peak Flow• 0 2821 cfs Peak Time• 8 00 hrs Hyd Vol 4152 33 cf - 0.0953 acft MOVEHYD [BASIN B] TO [BASIN B - 100 yr] AS [100 yr] Peak Flow• 1.0176 cfs Peak Time 8 00 hrs Hyd Vol 15341 03 cf - 0 3522 acft BSN B2 Event Summary: BasinlD Peak Q Event ------- (cfs) BSN B2 0.16 BSN B2 0 27 BSN B2 0 42 BSN 62 0 50 BSN 82 0 54 BSN B2 0 58 yr Drainage Area: BSN B2 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur: 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0542 0 68 SBUH/SCS TYPEIA 6 mo 8 00 0,0921 0 68 SBUH/SCS TYPEIA 2 yr 8 00 0 1464 0 68 SBUH/SCS TYPEIA 10 yr 8 00 0 1739 0 68 SBUH/SCS TYPEIA 25 yr 8 00 0 1877 0 68 SBUH/SCS TYPEIA 50 yr 8 00 0 2016 0 68 SBUHISCS TYPEIA 100 Area CN Pervious 0 0846 ac 78 00 Impervious 0 6001 ac a 98.00 Total 0 6847 ac Supporting Data: Pervious CN Data: Type B Sods Hydraulic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10.00 min TC 0 03 hrs 0 11 hrs 0.0846 ac 0 3774 ac 0.1653 ac 0.0574 ac Length Slope: Coeff Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length: Slope: Coeff• Travel Time 304.00 ft 0 50% 27.0000 3 52 min 27 00 ft 2 00% 0.0110 0.54 min 150 00 ft 0 50% 21 0000 1 68 min 12.00 ft 2.00% 0 0110 0 28 min 20.00 ft 2.00% 0.0110 0.42 min ADDHYD [BSN 61] AS [6 mo] [BSN 62] AS [6 mo] TO [BSN B1 +BSN 62] Peak Flow 0 2821 cfs Peak Time• 8.00 hrs Hyd Vol• 4152 33 cf - 0 0953 acft ADDHYD [BSN B1] AS [2 yr] [BSN B2] AS [2 yr] TO [BSN B1 +BSN 62] Peak Flow 0 4738 cfs Peak Time• 8.00 hrs Hyd Vol. 7038 64 cf - 0 1616 acft ADDHYD [BSN B1] AS [10 yr] [BSN B2] AS [10 yr] TO [BSN B1 +BSN B2] Peak Flow 0 7446 cfs Peak Time: 8 00 hrs Hyd Vol 11157 57 cf - 0 2561 acft ADDHYD [BSN B1] AS [25 yr] [BSN 62] AS [25 yr] TO [BSN B1 +BSN 62] Peak Flow. 0.8809 cfs ,Peak Time• 8.00 hrs Hyd Vol• 13244.07 cf - 0 3040 acft ADDHYD [BSN 61] AS [50 yr] [BSN B2] AS (50 yr] TO [BSN B1 +BSN B2] Peak Flow. 0 9492 cfs Peak Time• 8.00 hrs Hyd Vol• 14291 34 cf - 0 3281 acft ADDHYD [BSN 61] AS [100 yr] [BSN 62] AS [100 yr] TO [BSN B1 +BSN B2] Peak Flow 1 0176 cfs Peak Time. 8.00 hrs Hyd Vol 15341 03 cf - 0 3522 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip. Multiple Orifice Start EI Max EI Increment 329 0000 ft 335 0000 ft 0.10 Infil: 10 00 in/hr Multiplier. 1 00 Reach ID: BIOSWALE B Section Properties: Shape. Ditch Size Material Manning n Corr Metal -normal Length Slope Entrance Loss 200 0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh•1v Up Node Dn Node Up Invert DUMMY B 0 0000 ft Conduit Cons traints: Mln Vel Max Vel Min Cov 0 5000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0.0000 cf 0.0000 cf Ent Loss Exlt Loss Frict Loss 0 000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Manning n Formula ss2 3.OOh • 1 v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN B - 6 mo] THRU [BIOSWALE B] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ----- ac cfs cfs ratio ft ---- ftls ft/s ---------- BIOSWALE B 1 1872 0 2821 ---- 1 00 0 0787 Ditch 0 5724 ----- BASIN B ROUTEHYD [BASIN B - 100 yr] THRU [BIOSWALE B] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 1 0176 ---- 1 00 0 1703 Ditch 0 8771 ----- BASIN B Node ID: INFILTRATION B Desc: Manhole structure Start EI. 335.0000 ft Max EI~ 336.0000 ft Contrib Basin: Contrib Hyd: Length Width Void Ratio 200 0000 ft 10.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN B RLP Desc: Manhole structure Start EI: 335 0000 ft Max EI. 336.0000 ft Contnb Basin: Contrib Hyd: Storage Id: INFILTRATION B Discharge Id: INFILTRATION RLPCOMPUTE (BASIN Q RLP] SUMMARY 100 yr MatchQ=PeakQ= 1.0176 cfs Peak Out Q: 0.6472 cfs -Peak Stg: 336.20 ft - Active Vol: 1871 90 cf ' WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin B Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 DEVELOPED LAND USE Basin Basin B Flows To Bio-Inflltration Swale B Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale B Pond Type: Trapezoidal Pond Pond Flows to Point of Compllance Pond Rain / Evap is not acta.vated. Dimensions Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.5 0.046 0.000 0.000 0.000 334.6 0.048 0.004 0.000 0.463 334.7 0.050 0.007 0.000 0.463 334.7 0.053 0.011 0.000 0.463 334.8 0.055 0.016 0.000 0.463 ~OgEYH D,gti~ ~.~Of W~}L ~~~ ~' = x ti v~S ~Q'STEK~-° ~t^~r .~ ~~ ' Sf~~~44~ 09^~`! ~lAIR~S• ii-22• +.r.rr.rirss Irr~ 334.9 0.057 0.020 0.000 0.463 335.0 0.059 0.025 0.000 0.463 335.0 0.061 0.029 0.411 0.463 335.1 0.064 0.034 1.873 0.463 335.2 0.066 0.039 3.920 0.463 335.3 0.068 0.044 6.416 0.463 335.4 0.070 0.050 9.292 0.463 335.4 0.073 0.055 12.50 0.463 335.5 0.075 0.061 16.01 0.463 335.6 0.077 0.067 19.81 0.463 335.7 0.080 0.073 23.86 0.463 335.7 0.082 0.079 28.15 0.463 335.8 0.084 0.086 32.67 0.463 335.9 0.086 0.092 37.42 0.463 336.0 0.089 0.099 42.37 0.463 336.1 0.091 0.106 47.53 0.463 336.1 0.093 0.113 52.88 0.463 336.2 0.096 0.121 58.41 0.463 336.3 0.098 0.128 64.13 0.463 336.4 0.100 0.136 70.02 0.463 336.4 0.103 0.144 76.08 0.463 336.5 0.105 0.152 82.31 0.463 336.6 0.107 0.160 88.70 0.463 336.7 0.110 0.169 95.24 0.463 336.8 0.112 0.177 101.9 0.463 336.8 0.114 0.186 108.8 0.463 336.9 0.117 0.195 115.8 0.463 337.0 0.119 0.204 122.9 0.463 337.1 0.121 0.213 130.2 0.463 337.1 0.124 0.223 137.6 0.463 337.2 0.126 0.233 145.2 0.463 337.3 0.129 0.243 152.9 0.463 337.4 0.131 0.253 160.7 0.463 337.5 0.133 0.263 168.6 0.463 337.5 0.136 0.273 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.352 0.000 1957 0.577 0.000 1958 0.331 0.000 1959 0.388 0.000 1960 0.427 0.000 1961 0.282 0.000 1962 0.306 0.000 1963 0.606 0.005 1964 0.446 0.000 1965 0.416 0.000 1966 0.295 0.000 1967 0.355 0.000 1968 0.282 0.000 1969 0.279 0.000 1970 0.279 0.000 1971 0.346 0.000 1972 0.401 0.000 1973 0.328 0.000 1974 0.382 0.000 1975 0.331 0.000 1976 0.380 0.000 1977 0.482 0.000 1978 0.410 0.000 1979 0.488 0.000 1980 0.366 0.000 1981 0.417 0.000 1982 0.484 0.000 1983 0.518 0.000 1984 0.315 0.000 1985 0.365 0.000 1986 0.404 0.000 1987 0.427 0.000 1988 0.242 0.000 1989 0.290 0.000 1990 0.569 0.000 1991 0.560 0.000 1992 0.356 0.000 1993 0.261 0.000 1994 0.290 0.000 1995 0.419 0.000 1996 0.426 0.000 1997 0.343 0.000 1998 0.481 0.000 1999 0.413 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5766 0.0000 2 0.5686 0.0000 3 0.5600 0.0000 4 0.5176 0.0000 5 0.4876 0.0000 6 0.4835 0.0000 7 0.4822 .0.0000 8 0.4805 0.0000 9 0.4465 0.0000 10 0.4269 0.0000 11 0.4267 0.0000 i2 0.4257 _ 0.0000 13 0.4195 0.0000 14 0.4173 0.0000 15 0.4163 0.0000 16 0.4128 0.0000 17 0.4097 0.0000 18 0.4041 0.0000 19 0.4014 0.0000 20 0.3878 0.0000 21 0.3819 0.0000 22 0.3800 0.0000 23 0.3657 0.0000 24 0.3653 0.0000 25 0.3557 0.0000 26 0.3549 0.0000 27 0.3524 0.0000 28 0.3460 0.0000 29 0.3430 0.0000 30 0.3313 0.0000 31 0.3309 0.0000 32 0.3280 0.0000 33 0.3151 0.0000 34 0.3063 0.0000 35 0.2950 0.0000 36 0.2897 0.0000 37 0.2896 0.0000 38 0.2821 0.0000 39 0.2819 0.0000 40 0.2793 0.0000 41 0.2789 0.0000 42 0.2606 0.0000 43 0.2421 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1888 1058 0 .0 Pass 0.1931 983 0 .0 Pass 0.1974 921 0 .0 Pass 0.2017 855 0 .0 Pass 0.2060 799 0 .0 Pass 0.2103 722 0 .0 Pass 0.2145 677 0 .0 Pass 0.2188 633 0 .0 Pass 0.2231 589 0 .0 Pass 0.2274 544 0 .0 Pass 0.2317 508 0 .0 Pass 0.2360 466 0 .0 Pass 0.2403 440 0 .0 Pass 0.2446 407 0 .0 Pass 0.2489 374 0 .0 Pass 0.2532 344 0 .0 Pass 0.2575 319 0 .0 Pass 0.2617 302 0 .0 Pass 0.2660 282 0 .0 Pass 0.2703 259 0 .0 Pass 0.2746 241 0 .0 Pass 0.2789 228 0 .0 Pass 0.2832 206 0 .0 Pass 0.2875 193 0 .0 Pass 0.2918 180 0 .0 Pass 0.2961 170 0 .0 Pass 0.3004 163 0 .0 Pass 0.3046 158 0 .0 Pass 0.3089 150 0 .0 Pass 0.3132 143 0 .0 Pass 0.3175 140 0 .0 Pass 0.3218 137 0 .0 Pass 0.3261 127 0 .0 Pass 0.3304 117 0 .0 Pass 0.3347 111 0 .0 Pass 0.3390 i05 0 .0 Pass 0.3433 100 0 .0 Pass 0.3476 91 0 .0 Pass 0.3518 87 0 .0 Pass 0.3561 81 0 .0 Pass 0.3604 73 0 .0 Pass 0.3647 69 0 .0 Pass 0.3690 65 0 .0 Pass 0.373 61 0 .0 Pass 0.3776 59 0 .0 Pass 0..3819 56 0 .0 Pass 0.3862 52 0 .0 Pass 0.3905 47 0 .0 Pass 0.3947 45 0 .0 Pass 0.3990 43 0 .0 Pass 0.4033 39 0 .0 Pass 0.4076 36 0 .0 Pass 0.4119 35 0 .0 Pass 0.4162 31 0 .0 Pass 0.4205 25 0 .0 Pass 0.4248 25 0 .0 Pass 0.4291 22 0 .0 Pass 0.4334 21 0 .0 Pass 0.4377 19 0 .0 Pass 0.4419 19 0 .0 Pass 0.4462 17 0 .0 Pass 0.4505 16 0 .0 Pass 0.4548 16 0 .0 Pass 0.4591 15 0 .0 Pass 0.4634 15 0 .0 Pass 0.4677 14 0 .0 Pass 0.4720 12 0 .0 Pass 0.4763 12 0 .0 Pass 0.4806 12 0 .0 Pass 0.4848 9 0 .0 Pass 0.4891 8 0 .0 Pass 0.4934 8 0 .0 Pass 0.4977 7 0 .0 Pass 0.5020 7 0 .0 Pass 0.5063 6 0 .0 Pass 0.5106 6 0 .0 Pass 0.5149 6 0 .0 Pass 0.5192 5 0 .0 Pass 0.5235 5 0 .0 Pass 0.5278 5 0 .0 Pass 0.5320 5 0 .0 Pass 0.5363 5 0 .0 Pass 0.5406 5 0 .0 Pass 0.5449 5 0 .0 Pass 0.5492 5 0 .0 Pass 0.5535 5 0 .0 Pass 0.5578 5 0 .0 Pass 0.5621 4 0 .0 Pass 0.5664 4 0 .0 Pass 0.5707 3 0 .0 Pass 0.5750 3 0 .0 Pass 0.5792 1 0 .0 Pass 0.5835 1 0 .0 Pass 0.5878 1 0 .0 Pass 0.5921 1 0 .0 Pass 0.5964 1 0 .0 Pass 0.6007 1 0 .0 Pass 0.6050 1 0 .0 Pass 0.6093 0 0 .0 Pass 0.6136 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.197 acre-feet On-line facility target flow: 0.2 cfs. Adjusted for 15 m~.n: 0.23 cfs Off-line facility target flow: 0.11 cfs. Adjusted for 15 min: 0.13 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardinc the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Stat Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Wasnington State Department of Ecology has been advised of the possibility of such damages. YEM f.LOW 4c1~ 700 6560 '-'- _ 1Q0 kkkkkkkkkkk kkkkkkk}~}~kkk 50 &136 25 5700 .-, w 1.0 10 5093 ~ , Ca ooaaarc~'~~jp°O°o ~ 5 4589 m oooooaoot~x'q~ 0 PredeeetOped 1 ~ 10E x Developed Mitigated 2 6776 - V _~ G1 10E-Z 3 ~ 1 10 ~0 3D dD 30 Sil 70 80 ~ 9*t Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR FLOW (tt•,i 100. 6560 , ~ o PredevelOped 'S0 ~ 6136 ~-~=-~---, ~ ~ _ ~ x Developed ~udh Pacd~y 0 51 ._ w~......._e__..~.. ~ ,~........ _ _.._a_ ~..m .,. ?5 5100 ` ° `~~ 10 5093 ~ i N 040 -~.-.~--.M_.....~_...._.... _____...._~.. 5 4589 ~ ,~~ ~ ~ ~., ~ ~~ ~ 029 -_._ .. _._... ...__.._~__ f ~` i ti.l, i ` ~ ~ ~ 2 3116 ~' rj ~' PI ,;~ a ~ 019 __w_______.__.______________ ,._.. V y ~~~ ~;l '~3 3 5 ~; ~~ ; yy ~ ~' 1~-5 ~ 10E-d 1QE•3 10E~2 10E-1 9 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph yF,AR FIOW {cfs) 100 11 38 SO 7 Ali 25 '~ 5 D45 ~~ 10 2 6&1 °--- , ~ ~ 5 1518 ° f ~ , 2 .5459 early Peaks for Developed W/Pond CLEARHIS BSN B1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN 81 0 12 8 00 BSN B1 0 20 8 00 BSN B1 0 32 8 00 BSN 61 0 38 8.00 BSN B1 0 41 8 00 BSN B1 0 44 8 00 yr Drainage Area: BSN B1 Hyd Method. SBUH Hyd Peak Factor: 484.00 Storm Dur. 24 00 hrs Area CN Pervious 0.0451 ac 78.00 Impervious 0 4574 ac 98.00 Total 0 5025 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type• Description Sheet Across Planter Strip Impervious TC Data: Flow type' Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0411 0 50 SBUH/SCS TYPEIA 6 mo 0 0694 0 50 SBUH/SCS TYPE1A 2 yr 0 1098 0 50 SBUH/SCS TYPE1A 10 yr 0 1301 0.50 SBUH/SCS TYPEIA 25 yr 0.1404 0 50 SBUH/SCS TYPEIA 50 yr 01506 0.50 SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs: 0.20 Intv: 10.00 min TC 0 03 hrs 0 09 hrs 0 0451 ac 0 2899 ac 0 1216 ac 0 0459 ac Length. Slope: Coeff• Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length: Slope Coeff: Travel Time 216.00 ft 0 50% 27.0000 2.50 min 27 00 ft 2.00% 0.0110 0 54 min 150 00 ft 0 50% 21 0000 1 68 mm 12 00 ft 2 00% 0.0110 0 28 min 20 00 ft 2 00% 0 0110 0 42 min Hydrograph ID: BASIN B - 100 yr Area: 1 1872 ac Hyd Int: 10 00 min Base Flow: Peak Flow• 1.0176 cfs Peak Time• 8 00 hrs Hyd Vol: 0 3522 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0031 8 67 0 4317 16.50 0 1391 0 83 0 0123 8 83 0 3671 16 67 0 1391 1 00 0 0238 9 00 0 3631 16 83 0 1391 1 17 0 0369 9 17 0 3196 17 00 0 1392 1 33 0 0496 9 33 0.2758 17 17 0 1348 1 50 0 0585 9 50 0 2734 17 33 0 1303 1 67 0 0682 9 67 0 2599 17 50 0 1301 1 83 0 0771 9 83 0 2469 17 67 0 1300 2.00 0 0830 10 00 0 2463 17 83 0 1300 2 17 0 0906 10 17 0 2333 18 00 0 1301 2 33 0 0980 10 33 0.2201 18 17 0 1257 2 50 0.1021 10 50 0 2195 18 33 0 1212 2.67 0 1055 10 67 0.2107 18 50 0 1209 2 83 0 1084 10 83 0 2019 18 67 0 1209 3 00 0 1109 11 00 0 2015 18 83 0 1209 3 17 0 1130 11 17 0 1971 19 00 0 1209 3 33 0 1150 11 33 0 1928 19 17 0 1165 3 50 0 1166 11 50 0 1926 19 33 0 1120 3 67 0 1215 11 67 0 1883 19 50 0 1118 3 83 0 1266 11 83 0 1839 19 67 0 1117 4 00 0 1283 12 00 0 1838 19 83 0 1117 4 17 0 1365 12 17 0 1794 20 00 0 1117 4 33 0 1453 12 33 0 1750 20 17 0 1118 4 50 0 1472 12 50 0 1748 20 33 0 1118 4 67 0 1555 12 67 0 1704 20 50 0 1118 4 83 0 1644 12 83 0 1660 20 67 0 1118 5 00 0 1666 13 00 0 1658 20 83 0 1118 517 01754 1317 01658 2100 01118 5 33 0 1847 13 33 0 1659 21 17 0 1119 5 50 0 1867 13 50 0 1659 21 33 0 1119 5 67 0 1956 13 67 0 1616 21 50 0 1119 5 83 0 2050 13 83 0 1572 21 67 0 1119 6 00 0 2069 14 00 0 1570 21 83 0 1119 6 17 0 2236 14 17 0 1569 22 00 0 1119 6 33 0 2414 14 33 0 1570 22 17 0 1075 6 50 0 2441 14 50 0 1571 22 33 0 1030 6 67 0 2691 14 67 0 1527 22.50 0 1027 6 83 0 2957 14 83 0 1483 22 67 0 1027 7 00 0 2991 15 00 0 1481 22 83 0 1027 7 17 0 3290 15 17 0 1480 23 00 0 1027 7 33 0 3603 15 33 0 1481 23.17 0.1027 7 50 0 3642 15 50 0 1481 23 33 0 1027 7 67 0 6659 15 67 0.1437 23 50 0 1027 7 83 0 9868 15 83 0 1393 23 67 0 1027 8 00 1 0176 16 00 0 1390 23 83 0 1028 8 17 0 7756 16 17 0 1390 24 00 0 1028 8 33 0 5146 16 33 0 1390 24 17 0 0535 8 50 0 4995 16 50 0 1391 24 33 0 0047 Hydrograph ID: BASIN B - 100 yr Area: 1 1872 ac Hyd Int• 10 00 min Base Flow. Peak Flow• 1 0176 cfs, Peak Time 8.00 hrs Hyd Vol• 0.3522 acft MOVEHYD (BASIN B] TO [ BASIN B - 6 mo] AS [6 mo] Peak Flow: 0 2821 cfs Peak Time 8 00 hrs Hyd Vol. 4152.33 cf - 0 0953 acft MOVEHYD [BASIN B] TO [ BASIN B - 100 yr] AS [100 yr] Peak Flow 1.0176 cfs Peak Time. 8.00 hrs Hyd Vol. 15341 03 cf - 0 3522 acft BSN B2 Event Summary: BasinlD Peak O Event ------- (cfs) BSN 62 0 16 BSN 62 0 27 BSN 62 0 42 BSN 62 0 50 BSN 62 0 54 BSN 62 0 58 yr Drainage Area: BSN B2 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur• 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0542 0 68 SBUH/SCS TYPEIA 6 mo 8 00 0 0921 0 68 SBUH/SCS TYPEIA 2 yr 8 00 0 1464 0 68 SBUH/SCS TYPEIA 10 yr 8 00 0.1739 0 68 SBUH/SCS TYPEIA 25 yr 8 00 0 1877 0 68 SBUH/SCS TYPE1A 50 yr 8 00 0 2016 0 68 SBUH/SCS TYPE1A 100 Area CN Pervious 0 0846 ac 78.00 Impervious 0 6001 ac 98 00 Total 0.6847 ac Supporting Data: Pervious CN Data: Type B Soils Hydraulic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description. Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Wat er Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method: SCS CN Number SCS Abs. 0.20 Intv: 10.00 min TC 0 03 hrs 0 11 hrs 0 0846 ac 0.3774 ac 0 1653 ac 0.0574 ac Length. Slope Coeff Travel Time 6 00 ft 2 00% 0.2400 1 90 min Length. Slope Coeff• Travel Time 304 00 ft 0.50% 27.0000 3 52 min 27 00 ft 2.00% 0 0110 0 54 min 150 00 ft 0 50% 21 0000 1 68 min 12 00 ft 2.00% 0.0110 0 28 min 20.00 ft 2.00% 0 0110 0.42 min ADDHYD [BSN 61] AS [6 mo] [BSN B2] AS [6 mo] TO [BSN B1 +BSN B2] Peak Flow. 0 2821 cfs Peak Time: 8 00 hrs Hyd Vol• 4152 33 cf - 0.0953 acft ADDHYD [BSN B1] AS [2 yr] [BSN B2] AS [2 yr] TO (BSN 61 +BSN 62] Peak Flow: 0 4738 cfs Peak Time: 8.00 hrs Hyd Vol: 7038 64 cf - 0 1616 acft ADDHYD [BSN B1] AS [10 yr] [BSN 62] AS [10 yr] TO [BSN 61 +BSN 62] Peak Flow: 0 7446 cfs Peak Time: 8.00 hrs Hyd Vol 11157 57 cf - 0 2561 acft ADDHYD [BSN 61] AS [25 yr] [BSN B2] AS [25 yr] TO [BSN B1 +BSN B2] Peak Flow: 0 8809 cfs Peak Time: 8 00 hrs Hyd Vol 13244 07 cf - 0.3040 acft ADDHYD (BSN B1] AS [50 yr] [BSN B2] AS [50 yr] TO [BSN B1 +BSN B2] Peak Flow. 0 9492 cfs Peak Time 8 00 hrs Hyd Vol. 14291 34 cf - 0 3281 acft ADDHYD [BSN 61] AS [100 yr] [BSN B2] AS [100 yr] TO [BSN B1 +BSN 62] Peak Flow 1 0176 cfs Peak Time. 8 00 hrs Hyd Vol 15341 03 cf - 0 3522 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Onfice Start EI Max EI Increment 329.0000 ft 335 0000 ft 0.10 Infil: 10 00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE B Section Properties: Shape Ditch Size Material Manning n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3 OOh.1 v Up Node Dn Node Up Invert DUMMY B 0 0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov 0.5000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0 000000 ft 0 000000 ft Routing Method: Travel Tlme Translation Hyd params By 0.0250 Manning n Formula ss2 3.OOh:1 v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0.0000 ft ROUTEHYD (BASIN B - 6 mo] THRU [BIOSWALE B] USING THUR100Y AND (6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 0 2821 ---- 1 00 0 0787 Ditch 0 5724 ----- BASIN B ROUTEHYD [BASIN B - 100 yr] THRU [BIOSWALE B] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ftls ---------- BIOSWALE B 1 1872 1 0176 ---- 1 00 0 1703 Ditch 0 8771 ----- BASIN B Node ID: INFILTRATION B Desc: Manhole structure Start EI• 335.0000 ft Max EI: 336 0000 ft Contnb Basm• Contnb Hyd: Length Width Void Ratio 200.0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN B RLP Desc: Manhole structure Start EI: 335 0000 ft Max EI: 336.0000 ft Contnb Basin: Contnb Hyd: Storage Id: INFILTRATION B Discharge Id: INFILTRATION RLPCOMPUTE [BASIN Q RLP] SUMMARY 100 yr MatchQ=PeakO= 1.0176 cfs Peak Out Q: 0 6472 cfs -Peak Stg. 336.20 ft - Active Vol. 1871.90 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: default Site Address: Tahoma Terra, LLC Ca.ty Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin B Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 DEVELOPED LAND USE Basin Basin B Flows To Bio-Infiltration Scaale B Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.9 IMPERVIOUS: 1.51 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale B Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, ,.~ or ~ , ,,,, Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.5 0.046 0.000 0.000 0.000 334.6 0.048 0.004 0.000 0.463 334.7 0.050 0.007 0.000 0.463 334.7 0.053 O.Oli 0.000 0.463 334.8 0.055 0.016 0.000 0.463 09-~ rAiRNS• l 1-22• ~~.+d...Y~ .~ 334.9' 0.057 0.020 0.000 0.463 335.0 0.059 0.025 0.000 0.463 3.35.0 0.061 0.029 0.411 0.463 335.1 0.064 0.034 1.873 0.463 335.2 0.066 0.039 3.920 0.463 335.3 0.068 0.044 6.416 0.463 335.4 0.070 0.050 9.292 0.463 335.4 0.073 0.055 12.50 0.463 335.5 0.075 0.061 16.01 0.463 335.6 0.077 0.067 19.81 0.463 335.7 0.080 0.073 23.86 0.463 335.7 0.082 0.079 28.15 0.463 335.8 0.084 0.086 32.67 0.463 335.9 0.086 0.092 37.42 0.463 336.0 0.089 0.099 42.37 0.463 336.1 0.091 0.106 47.53 0.463 336.1 0.093 0.113 52.88 0.463 336.2 0.096 0.121 58.41 0.463 336.3 0.098 0.128 64.13 0.463 336.4 0.100 0.136 70.02 0.463 336.4 0.103 0.144 76.08 0.463 336.5 0.105 0.152 82.31 0.463 336.6 0.107 0.160 88.70 0.463 336.7 0.110 0.169 95.24 0.463 336.8 0.112 0.177 101.9 0.463 336.8 0.114 0.186 108.8 0.463 336.9 0.117 0.195 115.8 0.463 337.0 0.119 0.204 122.9 0.463 337.1 0.121 0.213 130.2 0.463 337.1 0.124 0.223 137.6 0.463 337.2 0.126 0.233 145.2 0.463 337.3 0.129 0.243 152.9 0.463 337.4 0.131 0.253 160.7 0.463 337.5 0.133 0.263 168.6 0.463 337.5 0.130 0.273 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.377608 5 year 0.458906 10 year 0.509252 25 year 0.56998 50 year 0.613565 100 year 0.656013 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Unmitigated Flow (cfs) 0.377608 0.458906 0.509252 0.56998 0.613565 0.656013 Flow Frequency Return Pera.ods for Developed M~.tigated Return Pera.od Flow (cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.352 0.000 1957 0.577 0.000 1958 0.331 0.000 1959 0.388 0.000 1960 0.427 0.000 1961 0.282 0.000 1962 0.306 0.000 1963 0.606 0.005 1964 0.446 0.000 1965 0.416 0.000 1966 0.295 0.000 1967 0.355 0.000 1968 0.282 0.000 1969 0.279 0.000 1970 0.279 0.000 1971 0.346 0.000 1972 0.401 0.000 1973 0.328 0.000 1974 0.382 0.000 1975 0.331 0.000 1976 0.380 0.000 1977 0.482 0.000 1978 0.410 0.000 1979 0.488 0.000 1980 0.366 0.000 1981 0.417 0.000 1982 0.484 0.000 1983 0.518 0.000 1984 0.315 0.000 1985 0.365 0.000 1986 0.404 0.000 1987 0.427 0.000 1988 0.242 0.000 1989 0.290 0.000 1990 0.569 0.000 1991 0.560 0.000 1992 0.356 0.000 1993 0.261 0.000 1994 0.290 0.000 1995 0.419 0.000 1996 0.426 0.000 1997 0.343 0.000 1998 0.481 0.000 1999 0.413 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5766 0.0000 2 0.5686 0.0000 3 0.5600 0.0000 4 0.5176 0.0000 5 0.4876 0.0000 6 0.4835 0.0000 7 0.4822 0.0000 8 0.9805 0.0000 9 0.4465 0.0000 10 0.4269 0.0000 11 0.4267 0.0000 12 0.4257 0.0000 13 0.4195 0.0000 14 0.4173 0.0000 15 0.4163 0.0000 16 0.4128 0.0000 17 0.4097 0.0000 18 0.4041 0.0000 19 0.4014 0.0000 20 0.3878 0.0000 21 ~ 0.3819 0.0000 22 0.3800 0.0000 23 0.3657 0.0000 24 0.3653 0.0000 25 0.3557 0.0000 26 0.3549 0.0000 27 0.3524 0.0000 28 0.3460 0.0000 29 0.3430 0.0000 30 0.3313 0.0000 31 0.3309 0.0000 32 0.3280 0.0000 33 0.3151 0.0000 34 0.3063 0.0000 35 0.2950 0.0000 36 0.2897 0.0000 37 0.2896 0.0000 38 0.2821 0.0000 39 0.2819 0.0000 40 0.2793 0.0000 41 0.2789 0.0000 42 0.2606 0.0000 43 0.2421 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1888 1058 0 .0 Pass 0.1931 983 0 .0 Pass 0.1974 921 0 .0 Pass 0.2017 855 0 .0 Pass 0.2060 799 0 .0 Pass 0.2103 722 0 .0 Pass 0.2145 677 0 .0 Pass 0.2188 633 0 .0 Pass 0.2231 589 0 .0 Pass 0.2274 544 0 .0 Pass 0.2317 508 0 .0 Pass 0.2360 466 0 .0 Pass 0.2403 440 0 .0 Pass 0.2446 407 0 .0 Pass 0.2489 374 0 .0 Pass 0.2532 344 0 .0 Pass 0.2575 319 0 .0 Pass 0.2617 302 0 .0 Pass 0.2660 282 0 .0 Pass 0.2703 259 0 .0 Pass 0.2746 241 0 .0 Pass 0.2789 228 0 .0 Pass 0.2832 206 0 .0 Pass 0.2875 193 0 .0 Pass 0.2918 180 0 .0 Pass 0.2961 170 0 .0 Pass 0.3004 163 0 .0 Pass 0.3046 158 0 .0 Pass 0.3089 150 0 .0 Pass 0.3132 143 0 .0 Pass 0.3175 140 0 .0 Pass 0.3218 137 0 .0 Pass 0.3261 127 0 .0 Pass 0.3304 117 0 .0 Pass 0.3347 111 0 .0 Pass 0.3390 105 0 .0 Pass 0.3433 100 0 .0 Pass 0.3476 91 0 .0 Pass 0.3518 87 0 .0 Pass 0.3561 81 0 .0 Pass 0.3604 73 0 .0 Pass 0.3647 69 0 .0 Pass 0.3690 65 0 .0 Pass 0.3733 61 0 .0 Pass 0.3776 59 0 .0 Pass 0'.3819 56 0 .0 Pass 0.3862 52 0 .0 Pass 0.3905 47 0 .0 Pass 0.3947 45 0 .0 Pass 0.3990 43 0 .0 Pass 0.4033 39 0 .0 Pass 0.4076 36 0 .0 Pass 0.4119 35 0 .0 Pass 0.4162 31 0 .0 Pass 0.4205 25 0 .0 Pass 0.4248 25 0 .0 Pass 0.4291 22 0 .0 Pass 0.4334 21 0 .0 Pass 0.4377 19 0 .0 Pass 0.4419 19 0 .0 Pass 0.4462 17 0 .0 Pass 0.4505 16 0 .0 Pass 0.4548 16 0 .0 Pass 0.4591 15 0 .0 Pass 0.4634 15 0 .0 Pass 0.4677 14 0 .0 Pass 0.4720 12 0 .0 Pass 0.4763 12 0 .0 Pass 0.4806 12 0 .0 Pass 0.4848 9 0 .0 Pass 0.4891 8 0 .0 Pass 0.4934 8 0 .0 Pass 0.4977 7 0 .0 Pass 0.5020 7 0 .0 Pass 0.5063 6 0 .0 Pass 0.5106 6 0 .0 Pass 0.5149 6 0 .0 Pass 0.5192 5 0 .0 Pass 0.5235 5 0 .0 Pass 0.5278 5 0 .0 Pass 0.5320 5 0 .0 Pass 0.5363 5 0 .0 Pass 0.5406 5 0 .0 Pass 0.5449 5 0 .0 Pass 0.5492 5 0 .0 Pass 0.5535 5 0 .0 Pass 0.5578 5 0 .0 Pass 0.5621 4 0 .0 Pass 0.5664 4 0 .0 Pass 0.5707 3 0 .0 Pass 0.5750 3 0 .0 Pass 0.5792 1 0 .0 Pass 0.5835 1 0 .0 Pass 0.5878 1 0 .0 Pass 0.5921 1 0 .0 Pass 0.5964 1 0 .0 Pass 0.6007 1 0 .0 Pass 0.6050 1 0 .0 Pass 0.6093 0 0 .0 Pass 0.6136 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.197 acre-feet On-line facility target flow: 0.2 cfs. Adjusted for 15 min: 0.23 c£s Off-line facility target flow: 0.11 cfs. Adjusted for 15 min. 0.13 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardinc the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damagf for loss of business profits, loss of business information, business interruption, and the like) arising out of thf user of, or ~nabiiity to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEM •fLOW{cis) 100 6560 ~---. 10.0 xxkxxxxxxkxx~t~aswat~a~~oooxraxxxxxxkK~xx~ 50 6136 3 25 3700 10 5099 V 1.0 ... 5 4589 a1 oaaaafAdappOOo r ~ ~©reonooooC°o4~ ~ o Predeveloped 2 .3776 ~ ,= 10E-1 X Developed Mitigated v F ~, ~_ 3, d ,. ii, r 10E-2 '~ 1 10 20 30 d0 50 60 70 30 ~ 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR ftQiq (N"~ 100 .6560 o Prede+~~elopeci 50 6136 ~ , ' ~ ~ x Developed w~ Facility 25 5700 0 51 ~. ~_. ... .~ _w .__ . m...,.... . 10 5033 N 040 °------~~---~---~ --°-N-.~ 5 4589 ~ '" 029 __~~_ ___.____~__. a ~ 2 3776 ~ 0.19 _ ._ _ _.__ _ _ __ ___ _ ._______ _. tC ,C U _N 1~-5 ~ 10E•9 10E•3 10E~2 t0E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR fLOW {cfs) 100 11 38 3, 50 7701 ' 3t 25 S D45 , .> 10 2.0$1 ---~---°------~- ; , 5 1 518 , ~ 2 5459 early Peaks for Developed W/Pond CLEARHIS BSN B1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN 61 0 12 8 00 BSN 61 0 20 8 00 BSN 61 0 32 8 00 BSN 61 0 38 8 00 BSN 61 0 41 8 00 BSN 61 0 44 8 00 yr Drainage Area: BSN B1 Hyd Method. SBUH Hyd Peak Factor: 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0 0451 ac 78.00 Impervious 0.4574 ac 98 00 Total 0 5025 ac Supporting Data: Pervious CN Data: Type B Sods Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description• Sheet Across Planter Strip Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area (ac-ft) ac 0 0411 0 50 0 0694 0 50 0 1098 0 50 0 1301 0 50 0 1404 0.50 0 1506 0 50 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs: 0.20 Inty: 10.00 min TC 0 03 hrs 0.09 hrs 0.0451 ac 0 2899 ac 0 1216 ac 0 0459 ac Length. Slope• Coeff• Travel Time 6.00 ft 2.00% 0 2400 1 90 min Length: Slope: Coeff: Travel Time 216.00 ft 0.50% 27 0000 2 50 min 27 00 ft 2 00% 0.0110 0.54 min 150 00 ft 0 50% 21 0000 1 68 min 12.00 ft 2.00% 0 0110 0.28 min 20 00 ft 2.00% 0 0110 0 42 min Hydrograph ID: BASIN B - 100 yr Area: 1.1872 ac Hyd Int: Peak Flow: 1 0176 cfs Peak Time Time Flow Time hr cfs h 0 67 0 0031 8 083 00123 8 1 00 0 0238 9 1 17 0 0369 9 1 33 0 0496 9 1 50 0 0585 9 1 67 0 0682 9 1 83 0 0771 9 2 00 0 0830 1 2.17 0 0906 1 2 33 0.0980 1 2 50 0 1021 1 2 67 0 1055 1 2.83 0 1084 1 3 00 0 1109 1 3 17 0 1130 1 3 33 0 1150 1 3 50 ~ 0 1166 1 3.67 0 1215 1 3 83 0 1266 1 4 00 0 1283 1 4 17 0 1365 1 4 33 0 1453 1 4 50 0 1472 1 4 67 0 1555 1 4 83 0 1644 1 5 00 0 1666 1 5.17 0 1754 1 5 33 0 1847 1 5 50 0 1867 1 5 67 0 1956 1 5 83 0 2050 1 6 00 0 2069 1 6 17 0 2236 1 6 33 0 2414 1 6 50 0 2441 1 6 67 0 2691 1 6 83 0 2957 1 7 00 0 2991 1 7 17 0 3290 1 7 33 0 3603 1 7 50 0 3642 1 7 67 0 6659 7 83 0 9868 8 00 1 0176 8 17 0 7756 8 33 0 5146 8 50 0 4995 Hydrograph ID: BASIN B - Area: 1 1872 ac I Peak Flow: 1 0176 cfs. F r 67 83 00 17 33 50 67 83 0 00 017 0 33 0 50 0 67 0 83 1 00 1 17 1 33 1 50 1 67 1 83 2 00 2 17 2 33 2 50 2 67 2 83 3 00 317 3 33 3 50 3 67 3 83 4 00 4 17 4 33 4 50 4 67 4 83 5 00 5 17 5 33 5 50 15 67 15 83 16 00 16 17 16 33 16 50 100 yr Hyd Int 'eak Time 10 00 min 8 00 hrs Flow cfs 0 4317 0 3671 0 3631 0 3196 0 2758 0 2734 0.2599 0 2469 0 2463 0 2333 0 2201 0 2195 0 2107 0 2019 0 2015 0.1971 0 1928 0 1926 0 1883 0 1839 0 1838 0 1794 0 1750 0 1748 0 1704 0 1660 0 1658 0 1658 0 1659 0 1659 0 1616 0 1572 0 1570 0 1569 0 1570 0 1571 0 1527 0 1483 0 1481 0 1480 0 1481 0 1481 0 1437 0 1393 0 1390 0 1390 0 1390 0 1391 10 00 min 8 00 hrs MOVEHYD [BASIN B] TO [BASIN B - 6 mo] AS [6 mo] Peak Flow• 0.2821 cfs Peak Time• 8 00 hrs Hyd Vol MOVEHYD [BASIN B] TO [BASIN B - 100 yr] AS [100 yr] Peak Flow• 1 0176 cfs Peak Time: 8.00 hrs Hyd Vol Base Flow: Hyd Vol. Time hr 16 50 16 67 16.83 17 00 17 17 17 33 17 50 17 67 17 83 18 00 18 17 18 33 18 50 18 67 18 83 19 00 19 17 19.33 19 50 19 67 19 83 20 00 20 17 20 33 20 50 20 67 20 83 21.00 21 17 21 33 21 50 21 67 21 83 22 00 22 17 22 33 22.50 22 67 22 83 23 00 23 17 23 33 23 50 23 67 23 83 24 00 24 17 24 33 Base Flow• Hyd Vol: 0.3522 acft Flow cfs 0 1391 0 1391 0 1391 0 1392 0 1348 0 1303 0 1301 0 1300 0 1300 0 1301 0 1257 0 1212 0.1209 0 1209 0 1209 0 1209 0 1165 0 1120 0.1118 0 1117 0 1117 0 1117 0 1118 0 1118 0 1118 0 1118 0 1118 0 1118 0.1119 0 1119 0.1119 0 1119 0 1119 0 1119 0 1075 0 1030 0 1027 0 1027 0 1027 0 1027 0.1027 0 1027 0 1027 0 1027 0 1028 0 1028 0 0535 0 0047 0 3522 acft 4152 33 cf - 0 0953 acft 15341 03 cf - 0 3522 acft BSN B2 Event Summary: BasinlD Peak Q Event --- (cfs) BSN 62 0 16 BSN B2 0 27 BSN 62 0 42 BSN 62 0 50 BSN B2 0 54 BSN B2 0 58 yr Drainage Area: BSN B2 Hyd Method• SBUH Hyd Peak Factor 484.00 Storm Dur• 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0542 0 68 SBUH/SCS TYPEIA 6 mo 8 00 0 0921 0 68 SBUH/SCS TYPE1A 2 yr 8 00 0 1464 0 68 SBUH/SCS TYPEIA 10 yr 8 00 0.1739 0 68 SBUH/SCS TYPEIA 25 yr 8 00 0 1877 0 68 SBUH/SCS TYPEIA 50 yr 8 00 0 2016 0 68 SBUH/SCS TYPEIA 100 Area CN Pervious 0 0846 ac 78 00 Impervious 0 6001 ac 98.00 Total 0 6847 ac Supporting Data: Pervious CN Data: Type B Sods Hydraulic Group 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type' Descnption• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method SCS CN Number SCS Abs: 0.20 Intv 10.00 min TC 0.03 hrs 0 11 hrs 0.0846 ac 0 3774 ac 0.1653 ac 0.0574 ac Length• Slope: Coeff. Travel Time 6.00 ft 2.00% 0.2400 1 90 min Length Slope: Coeff: Travel Time 304 00 ft 0.50% 27.0000 3.52 min 27 00 ft 2.00% 0.0110 0 54 min 150 00 ft 0 50% 21 0000 1 68 min 12 00 ft 2.00% 0.0110 0 28 min 20 00 ft 2.00% 0.0110 0 42 min ADDHYD [BSN B1] AS [6 mo] [BSN B2] AS [6 mo] TO [BSN B1 +BSN B2] Peak Flow• 0 2821 cfs Peak Time: 8 00 hrs Hyd Vol• 4152 33 cf - 0.0953 acft ADDHYD [BSN B1] AS [2 yr] [BSN 62] AS [2 yr] TO [BSN B1 +BSN B2] Peak Flow• 0 4738 cfs Peak Time: 8.00 hrs Hyd Vol: 7038.64 cf - 0 1616 acft ADDHYD (BSN B1] AS [10 yr] [BSN 62] AS [10 yr] TO [BSN B1 +BSN B2] Peak Flow 0 7446 cfs Peak Time. 8 00 hrs Hyd Vol• 11157 57 cf - 0 2561 acft ADDHYD (BSN B1] AS [25 yr] [BSN 62] AS [25 yr] TO (BSN B1 +BSN B2] Peak Flow• 0 8809 cfs ,Peak Time. 8 00 hrs Hyd Vol. 13244.07 cf - 0 3040 acft ADDHYD [BSN B1] AS [50 yr] [BSN B2] AS [50 yr] TO [BSN B1 +BSN B2] Peak Flow 0 9492 cfs Peak Time• 8 00 hrs Hyd Vol 14291 34 cf - 0 3281 acft ADDHYD [BSN 61] AS [100 yr] [BSN 62] AS [100 yr] TO [BSN B1 +BSN 62] Peak Flow• 1 0176 cfs Peak Time: 8 00 hrs Hyd Vol: 15341 03 cf - 0 3522 acft l Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 329.0000 ft 335.0000 ft 0.10 Infil: 10.00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE B Section Properties: Shape• Ditch Size Material Manning n Corr Metal -n ormal Length Slope Entrance Loss 200 0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3.OOh•1v Up Node Dn Node Up Invert DUMMY B 0 0000 ft Conduit Cons traints: Mln Vel ~ Max Vel Min Cov 0.5000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10.000OIn/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0 0000 cf 0.0000 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0.000000 ft 0 000000 ft Routing Method: Travel Tlme Translation Hyd params By 0.0250 Manning n Formula ss2 3 OOh:1 v Dn Invert 0.0000 ft Mln Slope Max Slope Min drop 0 5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN B - 6 mo] THRU (BIOSWALE B] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 0 2821 ---- 1 00 0 0787 Ditch 0 5724 ----- BASIN B ROUTEHYD [BASIN B - 100 yr] THRU [BIOSWALE B] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE B 1 1872 1 0176 ---- 1 00 0 1703 Ditch 0 8771 ----- BASIN B Node ID: INFILTRATION B Desc: Manhole structure Start EI: 335.0000 ft Max EI. 336 0000 ft Contnb Basin. Contnb Hyd Length Width Void Ratio 200 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN B RLP Desc: Manhole structure Start EI. 335 0000 ft Max EI• 336 0000 ft Contnb Basin: Contnb Hyd Storage Id: INFILTRATION B Discharge Id: INFILTRATION RLPCOMPUTE [BASIN Q RLP] SUMMARY 100 yr MatchO=PeakQ= 1.0176 cfs Peak Out Q' 0.6472 cfs -Peak Stg: 336 20 ft - Active Vol• 1871 90 cf a -9 CLEARHIS RLPCOMPUTE [LPR 100 YR] SUMMARY 100 year MatchQ=PeakQ= 2 0182 cfs Peak Out Q 1 2001 cfs -Peak Stg 33._22 ft - ~~~ ~-r-ior-• Active Vol 1430 94 cf I o D Y i2 '~ Running C \Program Fdes\StormShed\Example\LPR 100 YR Report pgm on Wednesday, September 21, 2005 Summary Report of all RLPooI Data Project Precips [6 month] 1 28 in [100 year] 4 00 in [] OOOin [] OOOin [] OOOin [] OOOin BASLIST2 [Basin A] Using [TYPE1A] As [100 year] LSTEND BasinlD Peak O Peak T Peak Vol Area Method Ramtype Event _______ (cfs) (hrs) (ac-ft) ac /Loss Basin A 2 0182 8 00 0 7850 3 41 SBUH/SCS TYPE1A 100 year BASLIST [TYPE1A] AS [100 year] DETAILED [Basin A] LSTEND Drainage Area: Basin A Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs Area Pervious 1 8200 ac CN 78 00 '~ Impervious 1 5900 ac 98 00 ~ Total 3 4100 ac Supporting Data: Pervious CN Data: Pervious Area "A" ~ 78 00 Impervious CN Data: " " 98 00 '~ A Impervious Area Pervious TC Data: Flow type' Description• Fixed Pervious Area Assumed Loss Method SCS CN Number SCS Abs 0 20 TC 0 33 hrs 0 08 hrs 1 8200 ac 1.5900 ac Length• Slope OOOft 000% Coeff. Travel Time 20 0000 20 00 mm Impervious TC Data: Flow type Description Fixed Impervius TC Assumed STORLIST [Gallery A 100 yr] LSTEND Length. Slope. Coeff Travel Time 0 00 ft 0 00% 5 0000 5 00 min ~- Q CLEARHIS RLPCOMPUTE [LPR 6 month] SUMMARY 6 month MatchQ=PeakQ= 0 4264 cfs Peak Out O 0 1452 cfs -Peak Stg 335 42 ft - Active Vol 659 08 cf Running C \Program Files\StormShed\Example\LPR 6 month Report pgm on Wednesday, September 21, 2005 Summary Report of all RLPooI Data Project Precips [6 month] 1 28 m [100 year] 4 00 in [] OOOin [] OOOin [] OOOin [] OOOin BASLIST2 [Basin A] Using [TYPE1A] As [6 month] LSTEND BasinlD PeakQ Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss Basin A 0 4264 8 00 0 1629 3 41 SBUH/SCS TYPE1A month BASLIST (fYPE1A] AS [6 month] DETAILED [Basin A] LSTEND Drainage Area: Basin A Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs Area CN Pervious 1 8200 ac 78 00 Impervious 1 5900 ac 98 00 Total 3 4100 ac Supporting Data: Pervious CN Data: Pervious Area "A" 78 00 Impervious CN Data: Impervious Area "A" 98 00 Pervious TC Data: Flow type Description Fixed Pervious Area Assumed Loss Method SCS CN Number SCS Abs 0 20 TC 0 33 hrs 0 08 hrs 6 1 8200 ac 1 5900 ac Length. Slope. Coeff Travel Time 0 00 ft 0 00% 20 0000 20 00 min G'~ - Impervious TC Data: Flow type Descrlptlon Flxed Impervlus TC Assumed HYDLIST SUMMARY [6 Month Treat Elev] LSTEND HydID Peak O Peak T ------- (cfs) (hrs) 6 Month Treat Elev 0 15 9 17 STORLIST [Gallery A 6 month] LSTEND Node ID: Gallery A 6 month Desc Gallery Slzing 300 x 10 Start EI 335 2000 ft ,/ Contnb Basln Length Wldth 300 0000 ft 10 0000 ft Length Slope Coeff Travel Tlme 0 00 ft 0 00% 5 0000 5 00 min Peak Vol Cont Area (ac-ft) (ac) 0 1631 3 4100 Max EI 338 2000 ft Contnb Hyd Vold Ratlo 100 00 DISCHLIST [Inf Gallery 2 In/hr] LSTEND Control Structure ID: Inf. Gallery 2 in/hr -Infiltration control structure Descrlp Multiple Orlflce S Max EI Increment 30 0000 ft 340 0000 ft 0 10 Infll 2 00 In/hr Multiplier 1 00 3 ~ ' Z~ 3 WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -A Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin A Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 DEVELOPED LAND USE Basin Basin A Flows To Blo-Inflltratlon Swale A Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 RCHRES (POND) INFORMATION Pond Name: Blo-Infiltration Swale A Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 300ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.040 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 335.2 0.069 0.000 0.000 0.000 335.3 0.072 0.005 0.000 0.694 335.4 0.075 0.011 0.000 0.694 335.4 0.079 0.017 0.000 0.694 335.5 0.082 0.023 0.000 0.694 ~ ~OivAi Y.~ ' .yam ~g.ZQ--E ~~ a: 335.6 0.085 0.030 0.000 0.694 335.7 0.089 0.037 0.000 0.694 335.7 0.092 0.044 0.411 0.694 335.8 0.095 0.051 1.873 0.694 335.9 0.099 0.059 3.920 0.694 336.0 0.102 0.066 6.416 0.694 336.1 0.105 0.074 9.292 0.694 336.1 0.109 0.083 12.50 0.694 336.2 0.112 0.091 16.01 0.694 336.3 O.liS 0.100 19.81 0.694 336.4 0.119 0.109 23.86 0.694 336.4 0.122 0.119 28.15 0.694 336.5 0.125 0.128 32.67 0.694 336.6 0.129 0.138 37.42 0.694 336.7 0.132 0.148 42.37 0.694 336.8 0.135 0.159 47.53 0.694 336.8 0.139 0.169 52.88 0.694 336.9 0.142 0.180 58.41 0.694 337.0 0.146 0.191 64.13 0.694 337.1 0.149 0.203 70.02 0.694 337.1 0.152 0.215 76.08 0.694 337.2 0.156 0.226 82.31 0.694 337.3 0.159 0.239 88.70 0.694 337.4 0.163 0.251 95.24 0.694 337.5 0.166 0.264 101.9 0.694 337.5 0.169 0.277 108.8 0.694 337.6 0.173 0.290 115.8 0.694 337.7 0.176 0.304 122.9 0.694 337.8 0.180 0.318 130.2 0.694 337.8 0.183 0.332 137.6 0.694 337.9 0.187 0.346 145.2 0.694 338.0 0.190 0.361 152.9 0.694 338.1 0.194 0.376 160.7 0.694 338.2 0.197 0.391 168.6 0.694 338.2 0.200 0.406 176.7 0.694 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Pera.ods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.509 0.000 1957 0.820 0.000 1958 0.471 0.000 1959 0.550 0.000 1960 0.605 0.000 1961 0.403 0.000 1962 0.434 0.000 1963 0.875 0.000 1964 0.633 0.000 1965 0.595 0.000 1966 0.418 0.000 1967 0.512 0.000 1968 0.401 0.000 1969 0.396 0.000 1970 0.395 0.000 1971 0.491 0.000 1972 0.590 0.000 1973 0.465 0.000 1974 0.541 0.000 1975 0.469 0.000 1976 0.540 0.000 1977 0.683 0.000 1978 0.581 0.000 1979 0.691 0.000 1980 0.518 0.000 1981 0.593 0.000 1982 0.685 0.000 1983 0.734 0.000 1984 0.448 0.000 1985 0.518 0.000 1986 0.577 0.000 1987 0.621 0.000 1988 0.343 0.000 1989 0.411 0.000 1990 0.809 0.000 1991 0.823 0.000 1992 0.504 0.000 1993 0.369 0.000 1994 0.410 0.000 1995 0.594 0.000 1996 0.603 0.000 1997 0.486 0.000 1998 0.681 0.000 1999 0.585 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8229 0.0000 2 0.8196 0.0000 3 0.8087 0.0000 4 0.7336 0.0000 5 0.6911 0.0000 6 0.6853 0.0000 7 0.6834 0.0000 8 0.6811 0.0000 9 0.6328 0.0000 10 0.6206 0.0000 11 0.6050 0.0000 12 0.6034 0.0000 13 0.5947 0.0000 14 0.5945 0.0000 15 0.5933 0.0000 16 0.5895 0.0000 17 0.5850 0.0000 18 0.5806 0.0000 19 0.5768 0.0000 20 0.5497 O.000O 21 0.5414 0.0000 22 0.5405 0.0000 23 0.5183 0.0000 24 0.5177 0.0000 25 0.5120 0.0000 26 0.5086 0.0000 27 0.5042 0.0000 28 0.4913 0.0000 29 0.4862 0.0000 30 0.4708 0.0000 31 0.4690 0.0000 32 0.4649 0.0000 33 0.4477 0.0000 34 0.4342 0.0000 35 0.4181 0.0000 36 0.4105 0.0000 37 0.4105 0.0000 38 0.4034 0.0000 39 0.4008 0.0000 40 0.3959 0.0000 41 0.3953 0.0000 42 0.3694 0.0000 43 0.3431 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2688 1049 0 .0 Pass 0.2750 981 0 .0 Pass 0.2811 904 0 .0 Pass 0.2873 835 0 .0 Pass 0.2934 785 0 .0 Pass 0.2996 717 0 .0 Pass 0.3058 669 0 .0 Pass 0.3119 624 0 .0 Pass 0.3181 576 0 .0 Pass 0.3242 533 0 .0 Pass 0.3304 499 0 .0 Pass 0.3366 458 0 .0 Pass 0.3427 433 0 .0 Pass 0.3489 397 0 .0 Pass 0.3550 355 0 .0 Pass 0.3612 336 0 .0 Pass 0.3674 315 0 .0 Pass 0.3735 296 0 .0 Pass 0.3797 278 0 .0 Pass 0.3858 254 0 .0 Pass 0.3920 237 0 .0 Pass 0.3982 218 0 .0 Pass 0.4043 199 0 .0 Pass 0.4105 189 0 .0 Pass 0.4167 172 0 .0 Pass 0.4228 167 0 .0 Pass 0.4290 161 0 .0 Pass 0.4351 154 0 .0 Pass 0.4413 146 0 .0 Pass 0.4475 142 0 .0 Pass 0.4536 138 0 .0 Pass 0.4598 136 0 .0 Pass 0.4659 123 0 .0 Pass 0.4721 116 0 .0 Pass 0.4783 107 0 .0 Pass 0.4844 103 0 .0 Pass 0.4906 98 0 .0 Pass 0.4967 91 0 .0 Pass 0.5029 87 0 .0 Pass 0.5091 80 0 .0 Pass 0.5152 74 0 .0 Pass 0.5214 68 0 .0 Pass 0.5275 56 0 .0 Pass 0.5337 60 0 .0 Pass 0.5399 59 0 .0 Pass 0.5460 54 0 .0 Pass 0.5522 50 0 .0 Pass 0.5583 46 0 .0 Pass 0.5645 46 0 .0 Pass 0.5707 41 0 .0 Pass 0.5768 38 0 .0 Pass 0.5830 36 0 .0 Pass 0.5891 32 0 .0 Pass 0.5953 26 0 .0 Pass 0.6015 26 0 .0 Pass 0.6076 23 0 .0 Pass 0.6138 23 0 .0 Pass 0.6199 20 0 .0 Pass 0.6261 19 0 .0 Pass 0.6323 17 0 .0 Pass 0.6384 16 0 .0 Pass 0.6446 16 0 .0 Pass 0.6507 16 0 .0 Pass 0.6569 15 0 .0 Pass 0.6631 14 0 .0 Pass 0.6692 12 0 .0 Pass 0.6754 12 0 .0 Pass 0.6815 12 0 .0 Pass 0.6877 9 0 .0 Pass 0.6939 8 0 .0 Pass 0.7000 8 0 .0 Pass 0.7062 8 0 .0 Pass 0.7123 8 0 .0 Pass 0.7185 8 0 .0 Pass 0.7247 6 0 .0 Pass 0.7308 6 0 .0 Pass 0.7370 5 0 .0 Pass 0.7431 5 0 .0 Pass 0.7493 5 0 .0 Pass 0.7555 5 0 .0 Pass 0.7616 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7740 5 0 .0 Pass 0.7801 5 0 .0 Pass 0.7863 5 0 .0 Pass 0.7924 5 0 .0 Pass 0.7986 5 0 .0 Pass 0.8048 5 0 .0 Pass 0.8109 4 0 .0 Pass 0.8171 4 0 .0 Pass 0.8232 1 0 .0 Pass 0.8294 1 0 .0 Pass 0.8356 1 0 .0 Pass 0.8417 1 0 .0 Pass 0.8479 1 0 .0 Pass 0.8540 1 0 .0 Pass 0.8602 1 0 .0 Pass 0.8664 1 0 .0 Pass 0.8725 1 0 .0 Pass 0.8787 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. Off-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardin the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. Zn no event shall AQUA TERRA Consultants and/or the Wasnington State Department of Ecology be liable for any damages whatsoever (including without limitation to damag for loss of business profits, loss of business information, business interruption, and the like) ar~sing out of th user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of E.olcgy has been advised of the possibility of such damages. YEAR FLUtV{cts) 1Q~ kkkXkktkkkkkk7Sk~+X3~AWbp00040~kkkkkkk7<kkkk 104 .9402 -° - __ _ _. i 50 8787 - -, ' 25 815a ', ~ "~' 1-0 000 10 7277 .~. ot~'O'Jp° 5 6549 , a~ noooa R , , ~ o PrEdeueloped I; ~ ~ ~pE_~ x De+relop$d Mrt~gated 2 5376 U °' D ' ~ 14E-2 ` , 1 10 20 31! dO 5D 60 70 80 9O 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR FtOW tcfsl 104 9402 - ~ o Prede+re~ped 50 8787 ~-°-----~- ~ ' x Deueioped with Faciltt+/ 25 81;5 0 73 ~.am.~ ~.._ ._~.. u. ~_ e s . _.. _ ,.~....... W.V .. ~.... ~ .. 10 ,7277 ~ ~~ ~ ~ 057 ~...~~ .............~ _...®m.._~.~..~ ._.~_ 5 6549 11 ~ V ~ _.______~ __ _ M _ __ ~~~~r~,=~ ~; ~ ~~~ ~ 442 `~ ~ ~ ~~~ ~2 5316 ~ s , ~~ ~ ~ 0.27 ---_-_. ~______r. ____ ~ ~~___ ___ ~it ~ f~~ ~ ~:'~ ~ ~ 1 t ~ ~ , ~ ~ ~ ~ a , 1~•5 ~ 10E~4 10E•3 1~-2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph TEAR FLOW (cfs) 100 11 38 i, 50 7 741 25 5 D45 - 10 2 681 ~ ' 5 1518 , , :I 2 5459 arty Peaks for Developed W/Pond CLEARHIS BSN Al Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN Al 0.09 7 83 BSN Al 0 15 7 83 BSN Al 0 24 7 83 BSN Al 0 28 7 83 BSN Al 0 30 7 83 BSN Al 0 32 7 83 yr Drainage Area: BSN Al Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur 24.00 hrs Area CN Pervious 0 0000 ac 78.00 Impervious 0 3346 ac 98 00 Total 0 3346 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description. Sheet Across Planter Strip Impervious TC Data: Flow type' Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN A2 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN A2 0 09 7 83 BSN A2 0 15 7 83 BSN A2 0 27 7 83 BSN A2 0 29 7 83 BSN A2 031 783 yr Drainage Area: BSN A2 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0 0000 ac 78 00 Impervious 0 3233 ac 98 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0297 0 33 SBUH/SCS TYPEIA 6 mo 0 0495 0 33 SBUH/SCS TYPEIA 2 yr 0.0772 0 33 SBUH/SCS TYPEIA 10 yr 0 0911 0 33 SBUH/SCS TYPEIA 25 yr 0 0980 0 33 SBUH/SCS TYPEIA 50 yr 0 1050 0 33 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs 0 20 Intv: 10.00 min TC 0 03 hrs 0.06 hrs 0 0000 ac 0 2215 ac 0.0331 ac 0 0800 ac Length: Slope: Coeff• Travel Time 6 00 ft 2.00% 0 2400 1 90 min Length: Slope Coeff• Travel Time 240 00 ft 1.95% 27 0000 1 06 min 18.50 ft 2 00% 0.0110 0.40 min 150.00 ft 0.50% 21 0000 1.68 min 5 00 ft 2.00% 0.0110 0.14 min 20 00 ft 2.00% 0.0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0287 0 32 SBUH/SCS TYPE1A 6 mo 0 0478 0 32 SBUH/SCS TYPEIA 2 yr 0 0880 0 32 SBUH/SCS TYPE1A 25 yr 0 0947 0 32 SBUH/SCS TYPE1A 50 yr 0 1015 0 32 SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs~ 0 20 Intv 10 00 min TC 0 03 hrs 0 06 hrs Total 0.3233 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description• Sheet Across Planter Strip Impervious TC Data: Flow type' Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN A3 Event Summary: BasinlD Peak O Event ------- (cfs) BSN A3 0 04 BSN A3 0 06 BSN A3 0 10 BSN A3 0 12 BSN A3 0 13 BSN A3 0 14 yr 0 0000 ac 0.1937 ac 0 0263 ac 0.1033 ac Length: Slope. Coeff• Travel Time 6.00 ft 2.00% 0.2400 1 90 min Length: Slope• Coeff. Travel Time 225 00 ft 1.60% 27.0000 1.10 min 18.50 ft 2.00% 0 0110 0.40 min 150.00 ft 0.50% 21 0000 1 68 min 500 ft 200% 00110 0.14 min 20.00 ft 2.00% 0.0110 0 42 min Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0116 0 16 SBUH/SCS TYPE1A 6 mo 7 83 0 0201 0 16 SBUH/SCS TYPE1A 2 yr 7 83 0 0324 0 16 SBUH/SCS TYPEIA 10 yr 7 83 0 0387 0 16 SBUH/SCS TYPE1A 25 yr 7 83 0.0419 0 16 SBUH/SCS TYPEIA 50 yr 7 83 0 0450 0 16 SBUH/SCS TYPEIA 100 Drainage Area: BSN A3 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur• 24 00 hrs Area CN Pervious 0 0340 ac 78.00 Impervious 0 1265 ac 98.00 Total 0 1605 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type. Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs. 0.20 Intv. 10 00 min TC 0 04 hrs 0.04 hrs 0 0340 ac 0 0333 ac 0.0932 ac Length Slope• Coeff• Travel Time 7 00 ft 2.00% 0 2400 2.15 min Length: Slope Coeff Travel Time 125 00 ft 1.02% 27 0000 0 76 min 1600 ft 200% 00110 035 min 80 00 ft 0.50% 21 0000 0.90 min 500 ft 200% 00110 014 min BSN A4 Event Summary: BasinlD Peak O Event (cfs) BSN A4 0 22 BSN A4 0 36 BSN A4 0 55 BSN A4 0.65 BSN A4 0 70 BSN A4 0 75 yr Drainage Area: BSN A4 Hyd Method SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0718 0 81 SBUH/SCS TYPEIA 6 mo 7 83 0.1197 0.81 SBUH/SCS TYPE1A 2 yr 7 83 0 1868 0 81 SBUH/SCS TYPE1A 10 yr 7 83 0 2205 0 81 SBUH/SCS TYPEIA 25 yr 7 83 0 2373 0 81 SBUHISCS TYPEIA 50 yr 7 83 0 2541 0 81 SBUH/SCS TYPEIA 100 Area CN Pervious 0 0000 ac 78 00 Impervious 0.8099 ac 98 00 Total 0 8099 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Impervious TC Data: Flow type' Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs 0.20 Intv• 10.00 min TC 0 00 hrs 0.08 hrs 0 0000 ac 0.5984 ac 0 2115 ac Length. Slope. Coeff• Travel Time 200 00 ft 0.50% 27.0000 2 32 min 33 00 ft 2.00% 0 0110 0.63 min 120 00 ft 0.50% 21.0000 1 35 min 12.00 ft 2.00% 0 0110 0 28 min ADDHYD [BSN A1] AS [6 mo] [BSN A2] AS (6 mo] TO [BSN Al +BSN A2] Peak Flow 0.1804 cfs Peak Time 7 83 hrs Hyd Vol: 2541 43 cf - 0.0583 acft ADDHYD [BSN A1] AS [2 yr] [BSN AZ] AS [2 yr] TO [BSN Al +BSN A2] Peak Flow• 0 2995 cfs Peak Time 7 83 hrs Hyd Vol• 4237 84 cf - 0.0973 acft ADDHYD [BSN A1] AS [10 yr] [BSN A2] AS [10 yr] TO [BSN Al +BSN A2] Peak Flow 0.4624 cfs Peak Time: 7.83 hrs Hyd Vol 6611.98 cf - 0 1518 acft ADDHYD [BSN A1] AS [25 yr] [BSN A2] AS [25 yr] TO [BSN Al +BSN A2] Peak Flow. 0 5432 cfs Peak Time: 7.83 hrs Hyd Vol 7802.36 cf - 0 1791 acft ADDHYD (BSN A1] AS [50 yr] (BSN A2] AS (50 yr] TO [BSN Al +BSN A2] Peak Flow 0 5834 cfs Peak Time 7.83 hrs Hyd Vol. 8397 57 cf - 0 1928 acft ADDHYD (BSN A1] AS [100 yr] [BSN A2] AS [100 yr] TO [BSN Al +BSN A2] Peak Flow 0 6237 cfs Peak Time 7 83 hrs Hyd Vol 8992.93 cf - 0 2064 acft ADDHYD [BSN A3] AS [6 mo] [BSN A4] AS [6 mo] TO [BSN A3 +BSN A4] Peak Flow 0 2522 cfs Peak Time 7 83 hrs Hyd Vol 3634 73 cf - 0 0834 acft ADDHYD [BSN A3] AS [2 yr] [BSN A4] AS [2 yr] TO [BSN A3 +BSN A4] Peak Flow• 0.4204 cfs Peak Time 7 83 hrs Hyd Vol• 6091.00 cf - 0 1398 acft ADDHYD [BSN A3] AS [10 yr] [BSN A4] AS [10 yr] TO (BSN A3 +BSN A4] Peak Flow: 0 6538 cfs Peak Time: 7.83 hrs Hyd Vol: 9549 42 cf - 0 2192 acft ADDHYD [BSN A3] AS [25 yr] [BSN A4] AS [25 yr] TO [BSN A3 +BSN A4] Peak Flow 0.7701 cfs Peak Time: 7.83 hrs Hyd Vol. 11289.01 cf - 0 2592 acft ADDHYD [BSN A3] AS [50 yr] [BSN A4] AS [50 yr] TO [BSN A3 +BSN A4] Peak Flow 0 8282 cfs Peak Time. 7.83 hrs Hyd Vol: 12159 91 cf - 0 2792 acft ADDHYD [BSN A3] AS [100 yr] [BSN A4] AS [100 yr] TO [BSN A3 +BSN A4] Peak Flow: 0 8862 cfs Peak Time• 7.83 hrs Hyd Vol. 13031 54 cf - 0 2992 acft ADDHYD [BSN Al +BSN A2] AS 6 mo] BSN A3 +BSN A4] AS [6 mo] TO [BSN Al +BSN q2+BSNA3+BSNA4] Peak Flow• 0 4326 cfs Peak Time• 7.83 hrs Hyd Vol. 6176.16 cf - 0 1417 act 1~ ADDHYD [BSN Al +BSN A2] AS [2 yr] [BSN A3 +BSN A4] AS [2 yr] TO [BSN Al +BSN A2 +BSN A3 +BSN A4] Peak Flow• 0 7199 cfs Peak Time: 7 83 hrs Hyd Vol: 10328 08 cf - 0.2371 acft ADDHYD [BSN Al +BSN A2] AS [10 yr] [BSN A3 +BSN A4] AS [10 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow 1.1162 cfs Peak Time: 7 83 hrs Hyd Vol• 16160.76 cf - 0 371 acft ADDHYD [BSN Al +BSN AZj AS [25 yr] [BSN A3 +BSN A4] AS [25 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow 1 3133 cfs Peak Time: 7 83 hrs Hyd Vol: 19092.35 cf - 0 4383 acft ADDHYD [BSN Al +BSN A2] AS (50 yr] [BSN A3 +BSN A4] AS [50 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow• 1 4116 cfs Peak Time. 7.83 hrs Hyd Vol• 20560 32 cf - 0.4720 acft /-~ ADDHYD [BSN Al +BSN A2] AS 100 yr [BSN A3 +BSN A4] AS [100 yr] TO [BSN Al +~ BSN A2 +BSN A3 +BSN A4] .,Peak Flow 1 5099 cfs Peak Time. 7 83 hrs Hyd Vol: 22024 46 cf - 0 5056 acft MOVEHYD [BASIN A] TO (BASIN A - 6 mo] AS (6 mo] Peak Flow• 0.4326 cfs Peak Time: 7 83 hrs Hyd Vol 6176 16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 2 yr] AS [2 yr] Peak Flow• 0 7199 cfs Peak Time: 7 83 hrs Hyd Vol 10328 08 cf - 0 2371 acft MOVEHYD [BASIN A] TO [BASIN A - 10 yr] AS [10 yr] Peak Flow 1 1162 cfs Peak Time. 7.83 hrs Hyd Vol• 16160 76 cf - 0 3710 acft MOVEHYD [BASIN A] TO [BASIN A - 25 yr] AS [25 yr] Peak Flow• 1 3133 cfs Peak Time: 7 83 hrs Hyd Vol. 22024 46 cf - 0 4383 acft MOVEHYD [BASIN A] TO [BASIN A - 50 yr] AS [50 yr] Peak Flow• 1 4116 cfs Peak Time. 7 83 hrs Hyd Vol 20560 32 cf - 0 4720 acft MOVEHYD [BASIN A] TO (BASIN A -100 yr] AS [100 yr] Peak Flow 1.5099 cfs Peak Time. 7.83 hrs Hyd Vol: 22024 46 cf - 0 5056 acft Hydrograph ID: BASIN A - 100 yr Area: 1 6283 ac Hyd Int: 10.00 min Base Flow: Peak Flow. 1.5099 cfs Peak Time: 7.83 hrs Hyd Vol: 0 5056 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0057 8 67 0 5989 16 33 0.1952 0 83 0 0215 8 83 0.5074 16 50 0.1952 1 00 0 0394 9 00 0 5176 16 67 0 1953 1 17 0 0595 9 17 0 4440 16 83 0 1953 1 33 0 0785 9.33 0.3816 17 00 0 1953 1 50 0 0908 9 50 0 3888 17 17 0 1880 1 67 0 1057 9 67 0 3659 17 33 0 1817 1 83 0 1189 9 83 0 3475 17 50 0 1824 2 00 0 1268 10 00 0 3496 17 67 0 1823 2 17 0 1390 10 17 0 3277 17 83 0 1824 2 33 0.1499 10 33 0 3089 18 00 0 1824 2 50 0 1551 10 50 0 3111 18.17 0 1751 2 67 0 1601 10 67 0 2963 18 33 0 1687 2 83 0 1642 10 83 0 2839 18 50 0 1695 3 00 0 1679 11 00 0 2853 18 67 0 1693 3 17 0 1711 11 17 0.2779 18 83 0 1694 3 33 0.1739 11 33 0 2717 19 00 0.1694 3 50 0 1763 11 50 0 2724 19 17 0 1621 3 67 0 1848 11 67 0 2651 19 33 0.1558 3 83 0 1924 11 83 0 2589 19 50 0 1565 4 00 0 1938 12 00 0 2596 19 67 0 1564 4 17 0 2086 12 17 0 2523 19 83 0 1564 4 33 0 2217 12 33 0 2460 20 00 0.1564 4 50 0.2222 12 50 0 2468 20 17 0 1564 4 67 0 2372 12 67 0 2394 20 33 0 1564 4 83 0 2502 12 83 0 2331 20 50 0 1564 5 00 0 2507 13 00 0 2339 20 67 0 1564 5 17 0 2658 13 17 0 2338 20 83 0 1564 5 33 0 2790 13 33 0 2338 21 00 0 1565 5 50 0 2791 13 50 0 2339 21 17 0 1565 5 67 0 2943 13 67 0 2266 21 33 0 1565 5 83 0 3075 13 83 0 2203 21 50 0 1565 6 00 0 3074 14 00 0 2211 21 67 0 1565 6 17 0 3364 14 17 0 2210 21 83 0 1565 6 33 0 3618 14 33 0 2210 22 00 0 1565 6 50 0 3604 14 50 0 2210 22 17 0 1492 6 67 0 4038 14 67 0 2138 22 33 0 1429 6 83 0 4416 14 83 0 2075 22 50 0 1436 7 00 0 4389 15 00 0 2082 22 67 0 1435 7 17 0 4901 15.17 0 2081 22 83 0 1435 7 33 0 5344 15 33 0 2081 23 00 0 1435 7 50 0 5310 15 50 0 2082 23 17 0 1435 7 67 1 0520 15 67 0 2009 23 33 0 1435 7 g3 1 5099 15 83 0 1946 23 50 0 1435 8 00 1 4651 16 00 0 1953 23 67 0 1435 8 17 1 0480 16 17 0 1952 23 83 0 1435 8 33 0 6707 16 33 0 1952 24 00 0 1435 8 50 0 7149 16 50 0 1952 24 17 0 0632 MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow 0.4326 cfs Peak Time. 7 83 hrs Hyd Vol 6176.16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow 1.5099 cfs Peak Time 7 83 hrs Hyd Vol 22024.46 cf - 0.5056 acft Control Structure ID: Infiltration -Infiltration control structure Descnp• Multiple Orifice Start EI Max EI Increment 330 0000 ft 335.7000 ft 0 10 Infll: 10.OOIn/hr Multiplier 100 Reach ID: BIOSWALE A Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 300.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3.OOh:1 v Up Node Dn Node Up Invert dummy A 0 0000 ft Conduit Cons traints: Min Vel Max Vel Mm Cov 0.5000 ft 1.0000 ft 3 0000 ft In/Exfll Hold Up Hold Dn 10.000OIn/hr NO NO Conduit Summary: Tnb Area Flow Capacity 0.0000 ac 0 0000 cf 0.0000 cf Ent Loss Exlt Loss Fnct Loss 0.000000 ft 0.000000 ft 0 000000 ft Routing Method• Travel Tlme Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh:1 v Dn Invert 0.0000 ft Mln Slope Max Slope Mln drop 0.5000 ft 2 0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN A - 6 mo] THRU [BIOSWALE A USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE A 1 6283 0.4326 ---- 1 00 0 0864 Ditch 0 5724 ----- BASIN A ROUTEHYD [BASIN A - 100 yr] THRU [BIOSWALE A] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE A 1 6283 1 5099 ---- 1 00 0 1873 Ditch 0 9411 ----- BASIN A Node ID: INFILTRATION A Desc. Manhole structure Start EI 335 7000 ft Max EI• 336.7000 ft Contnb Basin: Contnb Hyd. Length Width Vold Ratio 300.0000 ft 10 0000 ft 39 00 Node ID: BASIN A RLP Desc Manhole structure Start EI. 335 7000 ft Max EI: 336.7000 ft Contnb Basin: Contrib Hyd: Storage Id: INFILTRATION A Discharge Id: Infiltration RLPCOMPUTE [BASIN A RLP] SUMMARY 100 yr MatchQ=PeakO= 1 5099 cfs Peak Out Q. 1.0773 cfs -Peak St : 336.75 ft - ctive Vol: ~ 2753.12 cf ~ ~ ~n~~l ~ ~~ ~~ o ~~' ~~ ,S WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT a Project Name: Tahoma Terra_BASIN -A Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin A Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 DEVELOPED LAND USE Basin Basin A Flows To Bio-Infiltration Swale A Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale A Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. (l~mcnc~nnc Depth: aft. Bottom Length: 300ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.040 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 335.2 0.069 0.000 0.000 0.000 335.3 0.072 0.005 0.000 0.694 335.4 0.075 0.011 0.000 0.694 335.4 0.079 0.017 0.000 0.694 335.5 0.082 0.023 0.000 0.694 r ~oF v, 4 ~ y; ~ ~'T~OZ ~~,,-- - r `~ J~NHj t" ;yam ~9~~V! EYg~s: ((-r_- P o ,~~--~ 3351.6 0.085 0.030 0.000 0.694 7 335 0.089 0.037 0.000 0.694 . a 335.7 0.092 0.044 0.411 0.694 335.8 0.095 0.051 1.873 0.694 335.9 0.099 0.059 3.920 0.694 336.0 0.102 0.066 6.416 0.694 336.1 0.105 0.074 9.292 0.694 336.1 0.109 0.083 12.50 0.694 336.2 0.112 0.091 16.01 0.694 336.3 0.115 0.100 19.81 0.694 336.4 0.119 0.109 23.86 0.694 336.4 0.122 0.119 28.15 0.694 336.5 0.125 0.128 32.67 0.694 336.6 0.129 0.138 37.42 0.694 336.7 0.132 0.148 42.37 0.694 336.8 0.135 0.159 47.53 0.694 336.8 0.139 0.169 52.88 0.694 336.9 0.142 0.180 58.41 0.694 337.0 0.146 0.191 64.13 0.694 337.1 0.149 0.203 70.02 0.694 337.1 0.152 0.215 76.08 0.694 337.2 0.156 0.226 82.31 0.694 337.3 0.159 0.239 88.70 0.694 337.4 0.163 0.251 95.24 0.694 337.5 0.166 0.264 101.9 0.694 337.5 0.169 0.277 108.8 0.694 337.6 0.173 0.290 115.8 0.694 337.7 0.176 0.304 122.9 0.694 337.8 0.180 0.318 130.2 0.694 337.8 0.183 0.332 137.6 0.694 337.9 0.187 0.346 145.2 0.694 338.0 0.190 0.361 152.9 0.694 338.1 0.194 0.376 160.7 0.694 338.2 0.197 0.391 168.6 0.694 338.2 0.200 0.406 176.7 0.694 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Mitigated Flow(cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Niztigated Year Predeveloped Developed 1956 0.509 0.000 1957 0.820 0.000 1958 0.471 0.000 1959 0.550 0.000 1960 0.605 0.000 1961 0.403 0.000 1962 0.434 0.000 1963 0.875 0.000 1964 0.633 0.000 1965 0.595 0.000 1966 0.418 0.000 1967 0.512 0.000 1968 0.401 0.000 1969 0.396 0.000 1970 0.395 0.000 1971 0.491 0.000 1972 0.590 0.000 1973 0.465 0.000 1974 0.541 0.000 1975 0.469 0.000 1976 0.540 0.000 1977 0.683 0.000 1978 0.581 0.000 1979 0.691 0.000 1980 0.518 0.000 1981 0.593 0.000 1982 0.685 0.000 1983 0.734 0.000 1984 0.448 0.000 1985 0.518 0.000 1986 0.577 0.000 1987 0.621 0.000 1988 0.343 0.000 1989 0.411 0.000 1990 0.809 0.000 1991 0.823 0.000 1992 0.504 0.000 1993 0.369 0.000 1994 0.410 0.000 1995 0.594 0.000 1996 0.603 0.000 1997 0.486 0.000 1998 0.681 0.000 1999 0.585 0.000 Ranked Yearly Peaks for Predeveloped and Developed-NLttigated Rank Predeveloped Developed 1 0.8229 0.0000 2 0.8196 0.0000 3 0.8087 0.0000 4 0.7336 0.0000 5 0.6911 0.0000 6 0.6853 0.0000 7 0.6834 -0.0000 8 0.6811 0.0000 9 0.6328 0.0000 10 0.6206 0.0000 11 0.6050 0.0000 12 0.6034 0.0000 13 0.5947 0.0000 14 0.5945 0.0000 15 0.5933 0.0000 16 0.5895 0.0000 17 0.5850 0.0000 18 0.5806 0.0000 19 0.5768 0.0000 20 0.5497 0.0000 21~ 0.5414 0.0000 22 0.5405 0.0000 23 0.5183 0.0000 24 0.5177 0.0000 25 0.5120 0.0000 26 0.5086 0.0000 27 0.5042 0.0000 28 0.4913 0.0000 29 0.4862 0.0000 30 0.4708 0.0000 31 0.4690 0.0000 32 0.4649 0.0000 33 0.4477 0.0000 34 0.4342 0.0000 35 0.4181 0.0000 36 0.4105 0.0000 37 0.4105 0.0000 38 0.4034 0.0000 39 0.4008 0.0000 40 0.3959 0.0000 41 0.3953 0.0000 42 0.3694 0.0000 43 0.3431 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2688 1049 0 .0 Pass 0.2750 981 0 .0 Pass 0.2811 904 0 .0 Pass 0.2873 835 0 .0 Pass 0.2934 785 0 .0 Pass 0.2996 717 0 .0 Pass 0.3058 669 0 .0 Pass 0.3119 624 0 .0 Pass 0.3181 576 0 .0 Pass 0.3242 533 0 .0 Pass 0.3304 499 0 .0 Pass 0.3366 458 0 .0 Pass 0.3427 433 0 .0 Pass 0.3489 397 0 .0 Pass 0.3550 355 0 .0 Pass 0.3612 336 0 .0 Pass 0.3674 315 0 .0 Pass 0.3735 296 0 .0 Pass 0.3797 278 0 .0 Pass 0.3858 254 0 .0 Pass 0.3920 237 0 .0 Pass 0.3982 218 0 .0 Pass 0.4043 199 0 .0 Pass 0.4105 189 0 .0 Pass 0.4167 172 0 .0 Pass 0.4228 167 0 .0 Pass 0.4290 161 0 .0 Pass 0.4351 154 0 .0 Pass 0.4413 146 0 .0 Pass 0.4475 142 0 .0 ~ Pass 0.4536 138 0 .0 Pass 0.4598 136 0 .0 Pass 0.4659 123 0 .0 Pass 0.4721 116 0 .0 Pass 0.4783 107 0 .0 Pass 0.4844 103 0 .0 Pass 0.4906 98 0 .0 Pass 0.4967 91 0 .0 Pass 0.5029 87 0 .0 Pass 0.5091 80 0 .0 Pass 0.5152 74 0 .0 Pass 0.5214 68 0 .0 Pass 0.5275 v6 0 .0 Pass 0:5337 60 0 .0 Pass 0.5399 59 0 .0 Pass 0.5460 54 0 .0 Pass 0.5522 50 0 .0 Pass 0.5583 46 0 .0 Pass 0.5645 46 0 .0 Pass 0.5707 41 0 .0 Pass 0.5768 38 0 .0 Pass 0.5830 36 0 .0 Pass 0.5891 32 0 .0 Pass 0.5953 26 0 .0 Pass 0.6015 26 0 .0 Pass 0.6076 23 0 .0 Pass 0.6138 23 0 .0 Pass 0.6199 20 0 .0 Pass 0.6261 19 0 .0 Pass 0.6323 17 0 .0 Pass 0.6384 16 0 .0 Pass 0.6446 16 0 .0 Pass 0.6507 16 0 .0 Pass 0.6569 15 0 .0 Pass 0.6631 14 0 .0 Pass 0.6692 12 0 .0 Pass 0.6754 12 0 .0 Pass 0.6815 12 0 .0 Pass 0.6877 9 0 .0 Pass 0.6939 8 0 .0 Pass 0.7000 8 0 .0 Pass 0.7062 8 0 .0 Pass 0.7123 8 0 .0 Pass 0.7185 8 0 .0 Pass 0.7247 6 0 .0 Pass 0.7308 6 0 .0 Pass 0.7370 5 0 .0 Pass 0.7431 5 0 .0 Pass 0.7493 5 0 .0 Pass 0.7555 5 0 .0 Pass 0.7616 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7740 5 0 .0 Pass 0.7801 5 0 .0 Pass 0.7863 5 0 .0 Pass 0.7924 5 0 .0 Pass 0.7986 5 0 .0 Pass 0.8048 5 0 .0 Pass 0.8109 4 0 .0 Pass 0.8171 4 0 .0 Pass 0.8232 1 0 .0 Pass 0.8294 1 0 .0 Pass 0.8356 1 0 .0 Pass 0.8417 1 0 .0 Pass 0.8479 1 0 .0 Pass 0.8540 1 0 .0 Pass 0.8602 1 0 .0 Pass 0.8664 1 0 .0 Pass 0.8725 1 0 .0 Pass 0.8787 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. Off-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The enure risk regardu the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sty Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the tivashington State Department of Ecology be liable for any damages whatsoever (including wrthout limitation to damac for loss of business profits, loss of business information, business interruption, and the like) arising out of tY user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEpFd FL~DWt~) 1Q0 xxxxxxxxxxx3aa~oor.ocoooaxxxxxxxkkxxx 10~ ..9402 ~-_. _ _ .. , 50 8787 25 ` 8155 +~ 1.0 10 7277 .~.. CppooCOO~4oa°°o° 5 6549 W ~ooaoon~'" ~ a Predeveloped ~ 10E_1 x Developed iditigated 2 5376 ~ U ~_ O 10E-2 1 10 2D 30 40 50 6U 7® 80 90 99 Cumulative Probabil' Yearly Peaks for Predeveloped Flow Frequency Chart TEAR F1Q14 tom) `160 9402 ~ o Predeveloped 50 3787 -------°-~-o- x Developed w~ Pacdity 25 8155 --~~'-~ ' G 013 ........~ ..~.~.~..~ .~.. m .~_ ~ _~...~m_~__..~...~,.. 10 .7277 ~ I ~ 3 ~~ ~ ~ 0.57 _.~.~.....~._ _~. .~_.. ~ y 5 6549 ~ ! 6 ~, ~~ ~' `t ~ ' ; I '~' 042 __ __.._____ _ .._____ 2 5376 °-°~ ~J i E, 1 ~ ~ l` ~ "~" ~ U 27 E Li e~ ~ ' I~ ~~ ~ ~ ~ ~ ~ ~~~ ~ ~ ~ v~ ~ ~ 1~~5 ~ 10E-4 10E•3 1QE~2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph 'GEAR FLOW {cfs) 160 1138 50 T 701 25 5.045 16 2 681 '._"'..~.."""°'."°` 5 1 518 2 5459 'early Peaks for Developed W/Pond CLEARHIS BSN Al Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN Al 0 09 7 83 BSN Al 0 15 7 83 BSN Al 0 24 7 83 BSN Al 0 28 7 83 BSN Al 0 30 7 83 BSN Al 0 32 7 83 yr Drainage Area: BSN Al Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0 0000 ac 78 00 Impervious 0 3346 ac 98 00 Total 0.3346 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type' Description. Sheet Across Planter Stnp Impervious TC Data: Flow type. Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN A2 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN A2 0 09 7 83 BSN A2 0 15 7 83 BSN A2 0 27 7 83 BSN A2 0 29 7 83 BSN A2 0 31 7 83 yr Drainage Area: BSN A2 Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Area CN Pervious 0 0000 ac 78 00 Impervious 0 3233 ac 98 00 Peak Vol Area (ac-ft) ac 0 0297 0 33 0 0495 0 33 0 0772 0 33 0 0911 0 33 0 0980 0 33 0 1050 0 33 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs• 0.20 Inty• 10 00 min TC 0 03 hrs 0 06 hrs 0.0000 ac 0 2215 ac 0 0331 ac 0 0800 ac Length: Slope: Coeff• Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length: Slope Coeff: Travel Time 240.00 ft 1 95% 27.0000 1 06 min 18 50 ft 2.00% 0 0110 0.40 min 150.00 ft 0 50% 21 0000 1.68 min 5.00 ft 2.00% 0 0110 0 14 min 20.00 ft 2 00% 0 0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0287 0 32 SBUH/SCS TYPE1A 6 mo 0.0478 0 32 SBUH/SCS TYPE1A 2 yr 0 0880 0 32 SBUH/SCS TYPEIA 25 yr 0 0947 0 32 SBUH/SCS TYPE1A 50 yr 0 1015 0 32 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs• 0 20 Intv. 10 00 min TC 0 03 hrs 0 06 hrs Total 0.3233 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0000 ac Impervious CN Data: ROADWAY 98 00 0.1937 ac SIDWALK 98.00 0.0263 ac DRIVEWAY 98 00 0.1033 ac Pervious TC Data: Flow type: Description: Length: Slope• Coeff: Travel Time Sheet Across Planter Stnp 6 00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type Description. Length: Slope• Coeff Travel Time Shallow Along Flow Line of Gutter 225.00 ft 1.60% 27.0000 1 10 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 150.00 ft 0.50% 21.0000 1 68 min Sheet Across Sidewalks 5.00 ft 2 00% 0.0110 0.14 min Sheet Across Driveway 20 00 ft 2.00% 0 0110 0 42 min BSN A3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN A3 0 04 7 83 0 0116 0 16 SBUH/SCS TYPEIA 6 mo BSN A3 0 06 7 83 0 0201 0 16 SBUH/SCS TYPEIA 2 yr BSN A3 0 10 7 83 0 0324 0 16 SBUH/SCS TYPEIA 10 yr BSN A3 0 12 7 83 0 0387 0 16 SBUH/SCS TYPEIA 25 yr BSN A3 0 13 7 83 0.0419 0 16 SBUH/SCS TYPEIA 50 yr BSN A3 0 14 7 83 0 0450 0 16 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN A3 Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur 24 00 hrs Area CN Pervious 0.0340 ac 78 00 Impervious 0 1265 ac 98 00 Total 0.1605 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 Pervious TC Data: Flow type. Description Sheet Across Planter Strip Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method. SCS CN Number SCS Abs. 0.20 Intv: 10 00 min TC 0.04 hrs 0.04 hrs 0 0340 ac 0 0333 ac 0 0932 ac Length Slope Coeff Travel Time 7 00 ft 2 00% 0.2400 2.15 min Length: Slope: Coeff: Travel Time 125.00 ft 1 02% 27.0000 0 76 min 16 00 ft 2.00% 0 0110 0 35 min 80 00 ft 0 50% 21 0000 0.90 min 500 ft 2.00% 00110 014 min BSN A4 Event Summary: BasinlD Peak Q Event - (cfs) BSN A4 0 22 BSN A4 0 36 BSN A4 0 55 BSN A4 0 65 BSN A4 0 70 BSN A4 0 75 yr Drainage Area: BSN A4 Hyd Method: SBUH Hyd Peak Factor. 484 00 Storm Dur 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0718 0 81 SBUH/SCS TYPEIA 6 mo 7 83 0 1197 0 81 SBUH/SCS TYPEIA 2 yr 7 83 0 1868 0 81 SBUH/SCS TYPEIA 10 yr 7 83 0 2205 0 81 SBUH/SCS TYPEIA 25 yr 7 83 0 2373 0 81 SBUH/SCS TYPE1A 50 yr 7 83 0 2541 0.81 SBUH/SCS TYPE1A 100 Area CN Pervious 0.0000 ac 78 00 Impervious 0.8099 ac 98.00 Total 0.8099 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10.00 min TC 0.00 hrs 0.08 hrs 0.0000 ac 0 5984 ac 0.2115 ac Length: Slope: Coeff• Travel Time 200 00 ft 0 50% 27 0000 2.32 min 33 00 ft 2 00% 0 0110 0.63 min 120.00 ft 0 50% 21 0000 1.35 min 12 00 ft 2.00% 0.0110 0 28 min ADDHYD [BSN A1] AS [6 mo] [BSN AZ] AS [6 mo] TO [BSN Al +BSN A2] Peak Flow• 0 1804 cfs Peak Time 7 83 hrs Hyd Vol• 2541 43 cf - 0 0583 acft ADDHYD [BSN A1] AS [2 yr] [BSN A2] AS [2 yr] TO [BSN Al +BSN A2] Peak Flow 0 2995 cfs Peak Time: 7 83 hrs Hyd Vol• 4237.84 cf - 0 0973 acft ADDHYD [BSN A1] AS [10 yr] [BSN A2] AS [10 yr] TO [BSN Al +BSN AZ] Peak Flow: 0.4624 cfs Peak Time 7 83 hrs Hyd Vol: 6611 98 cf - 0 1518 acft ADDHYD [BSN A1] AS [25 yr] [BSN A2] AS [25 yr] TO [BSN Al +BSN A2] Peak Flow. 0 5432 cfs Peak Time 7 83 hrs Hyd Vol 7802.36 cf - 0 1791 acft ADDHYD [BSN A1] AS [50 yr] [BSN A2] AS [50 yr] TO [BSN Al +BSN AZ] Peak Flow 0 5834 cfs Peak Time 7 83 hrs Hyd Vol: 8397 57 cf - 0 1928 acft ADDHYD [BSN A1] AS [100 yr] [BSN A2] AS [100 yr] TO [BSN Al +BSN A2] Peak Flow• 0.6237 cfs Peak Time 7 83 hrs Hyd Vol. 8992.93 cf - 0 2064 acft ADDHYD [BSN A3] AS [6 mo] [BSN A4] AS [6 mo] TO (BSN A3 +BSN A4] Peak Flow• 0 2522 cfs Peak Time: 7 83 hrs Hyd Vol• 3634.73 cf - 0 0834 acft ADDHYD [BSN A3] AS (2 yr] [BSN A4] AS [2 yr] TO [BSN A3 +BSN A4] Peak Flow 0 4204 cfs Peak Time• 7.83 hrs Hyd Vol• 6091.00 cf - 0.1398 acft ADDHYD [BSN A3] AS (10 yr] [BSN A4] AS [10 yr] TO [BSN A3 +BSN A4] Peak Flow. 0 6538 cfs Peak Time 7.83 hrs Hyd Vol 9549.42 cf - 0 2192 acft ADDHYD [BSN A3] AS [25 yr] [BSN A4] AS [25 yr] TO [BSN A3 +BSN A4] Peak Flow. 0.7701 cfs Peak Time. 7.83 hrs Hyd Vol 11289 01 cf - 0 2592 acft ADDHYD [BSN A3] AS [50 yr] [BSN A4] AS [50 yr] TO (BSN A3 +BSN A4] Peak Flow• 0.8282 cfs Peak Time: 7 83 hrs Hyd Vol: 12159.91 cf - 0.2792 acft ADDHYD [BSN A3] AS [100 yr] [BSN A4] AS [100 yr] TO [BSN A3 +BSN A4] Peak Flow 0 8862 cfs Peak Time: 7 83 hrs Hyd Vol: 13031 54 cf - 0.2992 acft ADDHYD (BSN Al +BSN A2] AS [6 mo] [BSN A3 +BSN A4] AS [6 mo] TO [BSN Al +BSN A2 +BSN A3 +BSN A4] Peak Flow• 0.4326 cfs Peak Time 7.83 hrs Hyd Vol: 6176 16 cf - 0 1417 acft ADDHYD [BSN Al +BSN A2] AS (2 yr] [BSN A3 +BSN A4] AS [2 yr] TO [BSN Al +BSN AZ +BSN A3 +BSN A4] Peak Flow 0 7199 cfs Peak Time 7.83 hrs Hyd Vol: 10328 08 cf - 0 2371 acft ADDHYD [BSN Al +BSN A2] AS [10 yr] [BSN A3 +BSN A4] AS [10 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow 1 1162 cfs Peak Time. 7 83 hrs Hyd Vol. 16160 76 cf - 0 371 acft ADDHYD [BSN Al +BSN A2] AS [25 yr] [BSN A3 +BSN A4] AS [25 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow. 1 3133 cfs Peak Time: 7 83 hrs Hyd Vol 19092 35 cf - 0 4383 acft ADDHYD [BSN Al +BSN A2] AS [50 yr] [BSN A3 +BSN A4] AS [50 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow• 1.4116 cfs Peak Time: 7 83 hrs Hyd Vol 20560.32 cf - 0.4720 acft ADDHYD [BSN Al +BSN A2] AS [100 yr] [BSN A3 +BSN A4] AS [100 yr] TO [BSN Al + BSN AZ +BSN A3 +BSN A4] Peak Flow: 1.5099 cfs Peak Time: 7 83 hrs Hyd Vol 22024 46 cf - 0 5056 acft MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow 0 4326 cfs Peak Time• 7 83 hrs Hyd Vol• 6176 16 cf - 0.1417 acft MOVEHYD [BASIN A] TO (BASIN A - 2 yr] AS [2 yr] Peak Flow 0.7199 cfs Peak Time. 7 83 hrs Hyd Vol. 10328.08 cf - 0 2371 acft MOVEHYD [BASIN A] TO [BASIN A - 10 yr] AS [10 yr] Peak Flow 1 1162 cfs Peak Time: 7 83 hrs Hyd Vol: 16160 76 cf - 0 3710 acft MOVEHYD [BASIN A] TO [BASIN A - 25 yr] AS [25 yr] Peak Flow 1 3133 cfs Peak Time 7 83 hrs Hyd Vol• 22024 46 cf - 0 4383 acft MOVEHYD (BASIN A] TO [BASIN A - 50 yr] AS [50 yr] Peak Flow• 1 4116 cfs Peak Time: 7 83 hrs Hyd Vol. 20560 32 cf - 0 4720 acft MOVEHYD [BASIN A] TO [BASIN A -100 yr] AS [100 yr] Peak Flow 1.5099 cfs Peak Time: 7 83 hrs Hyd Vol• 22024 46 cf - 0 5056 acft Hydrograph ID: BASIN A - 100 yr Area. 1.6283 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 1 5099 cfs Peak Time• 7 83 hrs Hyd Vol: 0 5056 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0057 8 67 0 5989 16.33 0 1952 0 83 0 0215 8 83 0 5074 16 50 0 1952 1 00 0 0394 9 00 0 5176 16 67 0 1953 1 17 0 0595 9 17 0 4440 16 83 0.1953 1 33 0 0785 9 33 0 3816 17 00 0 1953 1 50 0 0908 9 50 0 3888 17 17 0.1880 1 67 0.1057 9 67 0 3659 17 33 0 1817 1 83 0 1189 9 83 0 3475 17 50 0 1824 2 00 0.1268 10 00 0 3496 17 67 0 1823 2 17 0 1390 10 17 0 3277 17 83 0 1824 , 2 33 0 1499 10.33 0 3089 18 00 0 1824 2 50 0 1551 10 50 0 3111 18 17 0 1751 2 67 0 1601 10 67 0 2963 18 33 0 1687 2 83 0 1642 10 83 0.2839 18 50 0 1695 3 00 0 1679 11 00 0 2853 18 67 0 1693 3 17 0 1711 11 17 0 2779 18 83 0 1694 3 33 0 1739 11 33 0 2717 19 00 0 1694 3 50 0 1763 11 50 0 2724 19.17 0 1621 3 67 0 1848 11 67 0 2651 19 33 0 1558 3 83 0 1924 11 83 0 2589 19 50 0 1565 4 00 0 1938 12 00 0 2596 19 67 0.1564 4 17 0 2086 12 17 0 2523 19 83 0 1564 , 4 33 0 2217 12.33 0 2460 20 00 0 1564 4 50 0 2222 12 50 0 2468 20 17 0 1564 4 67 0 2372 12 67 0 2394 20 33 0 1564 4 83 0 2502 12 83 0 2331 20 50 0 1564 5 00 0 2507 13 00 0 2339 20 67 0 1564 5 17 0 2658 13 17 0 2338 20 83 0 1564 5 33 0 2790 13.33 0 2338 21 00 0 1565 5 50 0 2791 13.50 0 2339 21 17 0 1565 5 67 0 2943 13 67 0 2266 21 33 0 1565 5 83 0 3075 13 83 0 2203 21 50 0 1565 6 00 0 3074 14 00 0 2211 21 67 0 1565 6 17 0 3364 14 17 0 2210 21 83 0 1565 6 33 0 3618 14 33 0 2210 22 00 0 1565 6 50 0 3604 14.50 0 2210 22 17 0 1492 6 67 0 4038 14 67 0 2138 22 33 0 1429 6 83 0 4416 14.83 0 2075 22 50 0.1436 7 00 0 4389 15 00 0 2082 22 67 0 1435 7 17 0 4901 15.17 0 2081 22.83 0.1435 7 33 0 5344 15 33 0 2081 23 00 0.1435 7 50 0 5310 15 50 0 2082 23 17 0.1435 7 g7 1 0520 15 67 0 2009 23 33 0 1435 7 g3 1 5099 15 83 0 1946 23 50 0 1435 8 00 1 4651 16.00 0 1953 23 67 0 1435 8 17 1 0480 16 17 0 1952 23 83 0 1435 8 33 0 6707 16 33 0 1952 24 00 0 1435 8 50 0 7149 16 50 0 1952 24 17 0 0632 MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow: 0.4326 cfs Peak Time: 7 83 hrs Hyd Vol• 6176.16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow• 1.5099 cfs Peak Time: 7 83 hrs Hyd Vol: 22024 46 cf - 0.5056 acft Control Structure ID: Infiltration -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 330.0000 ft 335 7000 ft 0.10 Infll: 10 00 in/hr Multlplier• 1.00 Reach ID: BIOSWALE A Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 300.0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3 OOh:1 v Up Node Dn Node Up Invert dummy A 0 0000 ft Conduit Constraints: Min Vel Max Vel Mln Cov 0.5000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0.0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method. Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh:1 v Dn Invert 0.0000 ft Min Slope Max Slope Mln drop 0 5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN A - 6 mo] THRU [BIOSWALE A USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin 1 Hyd ftls ft/s ----- ac cfs cfs ratio ft ---- -°-----° BIOSWALE A 1 6283 0 4326 ---- 1 00 0 0864 Ditch 0 5724 ----- BASIN A ROUTEHYD [BASIN A - 100 yr] THRU [BIOSWALE A] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ft/s ft/s ----- ac cfs cfs ratio ft ---- ---°----- BIOSWALE A 1 6283 1 5099 ---- 1 00 0 1873 Ditch 0 9411 ----- BASIN A Node ID: INFILTRATION A Desc Manhole structure Start EI 335 7000 ft Contnb Basin Length Width 300 0000 ft 10 0000 ft Max EI: 336 7000 ft Contnb Hyd: Void Ratio 39 00 Node ID: BASIN A RLP Desc• Manhole structure Start EI 335.7000 ft Max EI• 336.7000 ft Contrib Basin: Contrib Hyd. Storage Id: INFILTRATION A Discharge Id: Infiltration RLPCOMPUTE [BASIN A RLP] SUMMARY 100 yr MatchO=PeakQ= 1.5099 cfs Peak Out Q' 1.0773 cfs -Peak Stg: 336.75 ft -Active Vol: 2753.12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -A Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin A Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 DEVELOPED LAND USE Basin Basin A Flows To Bio-Infiltration Swale A Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale A Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. T1, mcn c ~ nn c Depth: aft. Bottom Length: 300ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Sa.de slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Da.scharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.040 acre-ft. Pond Hydraulic Table Stage (f t) P.rea(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 335.2 0.069 0.000 0.000 0.000 335.3 0.072 0.005 0.000 0.694 335.4 0.075 0.011 0.000 0.694 335.4 0.079 C.017 0.000 0.694 335.5 0.082 0.023 0.000 0.694 ~~gEYt~ ID q,`~ _ ~oFwaJh.1 ~~O ~P eT ~ °' _ °. n ~~ - ~: ~ IOIV~.i y ~9 ~~ .v.......,_.. 335.6 0.085 0.030 0.000 0.694 335.7 0.089 0.037 0.000 0.694 335.7 0.092 0.044 0.411 0.694 335.8 0.095 0.051 1.873 0.694 335.9 0.099 0.059 3.920 0.694 336.0 0.102 0.066 6.416 0.694 336.1 0.105 0.074 9.292 0.694 336.1 0.109 0.083 12.50 0.694 336.2 0.112 0.091 16.01 0.694 336.3 0.115 0.100 19.81 0.694 336.4 0.119 0.109 23.86 0.694 336.4 0.122 0.119 28.15 0.694 336.5 0.125 0.128 32.67 0.694 336.6 0.129 0.138 37.42 0.694 336.7 0.132 0.148 42.37 0.694 336.8 0.135 0.159 47.53 0.694 336.8 0.139 0.169 52.88 0.694 336.9 0.142 0.180 58.41 0.694 337.0 0.146 0.191 64.13 0.694 337.1 0.149 0.203 70.02 0.694 337.1 0.152 0.215 76.08 0.694 337.2 0.156 0.226 82.31 0.694 337.3 0.159 0.239 88.70 0.694 337.4 0.163 0.251 95.24 0.694 337.5 0.166 0.264 101.9 0.694 337.5 0.169 0.277 108.8 0.694 337.6 0.173 0.290 115.8 0.694 337.7 0.176 0.304 122.9 0.694 337.8 0.180 0.318 130.2 0.694 337.8 0.183 0.332 137.6 0.694 337.9 0.187 0.346 145.2 0.694 338.0 0.190 0.361 152.9 0.694 338.1 0.194 0.376 160.7 0.694 338.2 0.197 0.391 168.6 0.694 338.2 0.200 0.406 176.7 0.694 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Periods for Developed M~.tigated Return Pera.od Flow (cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.509 0.000 1957 0.820 0.000 1958 0.471 0.000 1959 0.550 0.000 1960 0.605 0.000 1961 0.403 0.000 1962 0.434 0.000 1963 0.875 0.000 1964 0.633 0.000 1965 0.595 0.000 1966 0.418 0.000 1967 0.512 0.000 1968 0.401 0.000 1969 0.396 0.000 1970 0.395 0.000 1971 0.491 0.000 1972 0.590 0.000 1973 0.465 0.000 1974 0.541 0.000 1975 0.469 0.000 1976 0.540 0.000 1977 0.683 0.000 1978 0.581 0.000 1979 0.691 0.000 1980 0.518 0.000 1981 0.593 0.000 1982 0.685 0.000 1983 0.734 0.000 1984 0.448 0.000 1985 0.518 0.000 1986 0.577 0.000 1987 0.621 0.000 1988 0.343 0.000 1989 0.411 0.000 1990 0.809 0.000 1991 0.823 0.000 1992 0.504 0.000 1993 0.369 0.000 1994 0.410 0.000 1995 0.594 0.000 1996 0.603 0.000 1997 0.486 0.000 1998 0.681 0.000 1999 0.585 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8229 0.0000 2 0.8196 0.0000 3 0.8087 0.0000 4 0.7336 0.0000 5 0.6911 0.0000 6 0.6853 0.0000 7 0.6834 •0.0000 8 0.6811 0.0000 9 0.6328 0.0000 10 0.6206 0.0000 11 0.6050 0.0000 12 0.6034 0.0000 13 0.5947 0.0000 14 0.5945 0.0000 15 0.5933 0.0000 16 0.5895 0.0000 17 0.5850 0.0000 18 0.5806 0.0000 19 0.5768 0.0000 20 0.5497 0.0000 21 ~ 0.5414 0.0000 22 0.5405 0.0000 23 0.5183 0.0000 24 0.5177 0.0000 25 0.5120 0.0000 26 0.5086 0.0000 27 0.5042 0.0000 28 0.4913 0.0000 29 0.4862 0.0000 30 0.4708 0.0000 31 0.4690 0.0000 32 0.4649 0.0000 33 0.4477 0.0000 34 0.4342 0.0000 35 0.4181 0.0000 36 0.4105 0.0000 37 0.4105 0.0000 38 0.4034 0.0000 39 0.4008 0.0000 40 0.3959 0.0000 41 0.3953 0.0000 42 0.3694 0.0000 43 0.3431 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2688 1049 0 .0 Pass 0.2750 981 0 .0 Pass 0.2811 904 0 .0 Pass 0.2873 835 0 .0 Pass 0.2934 785 0 .0 Pass 0.2996 717 0 .0 Pass 0.3058 669 0 .0 Pass 0.3119 624 0 .0 Pass 0.3181 576 0 .0 Pass 0.3242 533 0 .0 Pass 0.3304 499 0 .0 Pass 0.3366 458 0 .0 Pass 0.3427 433 0 .0 Pass 0.3489 397 0 .0 Pass 0.3550 355 0 .0 Pass 0.3612 336 0 .0 Pass 0.3674 315 0 .0 Pass 0.3735 296 0 .0 Pass 0.3797 278 0 .0 Pass 0.3858 254 0 .0 Pass 0.3920 237 0 .0 Pass 0.3982 218 0 .0 Pass 0.4043 199 0 .0 Pass 0.4105 189 0 .0 Pass 0.4167 172 0 .0 Pass 0.4228 167 0 .0 Pass 0.4290 161 0 .0 Pass 0.4351 154 0 .0 Pass 0.4413 146 0 .0 Pass 0.4475 142 0 .0 Pass 0.4536 138 0 .0 Pass 0.4598 136 0 .0 Pass 0.4659 123 0 .0 Pass 0.4721 116 0 .0 Pass 0.4783 107 0 .0 Pass 0.4844 103 0 .0 Pass 0.4906 98 0 .0 Pass 0.4967 91 0 .0 Pass 0.5029 87 0 .0 Pass 0.5091 80 0 .0 Pass 0.5152 74 0 .0 Pass 0.5214 68 0 .0 Pass 0.5275 66 0 .0 Pass 0.5337 60 0 .0 Pass 0.5399 59 0 .0 Pass 0.5460 54 0 .0 Pass 0.5522 50 0 .0 Pass 0.5583 46 0 .0 Pass 0.5645 46 0 .0 Pass 0.5707 41 0 .0 Pass 0.5768 38 0 .0 Pass 0.5830 36 0 .0 Pass 0.5891 32 0 .0 Pass 0.5953 26 0 .0 Pass 0.6015 26 0 .0 Pass 0.6076 23 0 .0 Pass 0.6138 23 0 .0 Pass 0.6199 20 0 .0 Pass 0.6261 19 0 .0 Pass 0.6323 17 0 .0 Pass 0.6384 16 0 .0 Pass 0.6446 16 0 .0 Pass 0.6507 16 0 .0 Pass 0.6569 15 0 .0 Pass 0.6631 14 0 .0 Pass 0.6692 12 0 .0 Pass 0.6754 12 0 .0 Pass 0.6815 12 0 .0 Pass 0.6877 9 0 .0 Pass 0.6939 8 0 .0 Pass 0.7000 8 0 .0 Pass 0.7062 8 0 .0 Pass 0.7123 8 0 .0 Pass 0.7185 8 0 .0 Pass 0.7247 6 0 .0 Pass 0.7308 6 0 .0 Pass 0.7370 5 0 .0 Pass 0.7431 5 0 .0 Pass 0.7493 5 0 .0 Pass 0.7555 5 0 .0 Pass 0.7616 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7740 5 0 .0 Pass 0.7801 5 0 .0 Pass 0.7863 5 0 .0 Pass 0.7924 5 0 .0 Pass 0.7986 5 0 .0 Pass 0.8048 5 0 .0 Pass 0.8109 4 0 .0 Pass 0.8171 4 0 .0 Pass 0.8232 1 0 .0 Pass 0.8294 1 0 .0 Pass 0.8356 1 0 .0 Pass 0.8417 1 0 .0 Pass 0.8479 1 0 .0 Pass 0.8540 1 0 .0 Pass 0.8602 1 0 .0 Pass 0.8664 1 0 .0 Pass 0.8725 1 0 .0 Pass 0.8787 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. Off-line facility target flow• 0 cfs. Adjusted for 15 min 0 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardin the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damag for loss of business profits, loss of business information, business interruption, and the like) arising out of th user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology nas been advised of the possibrlity of such damages. YEAR 1D0 FLOW(s~ 9-002 ~-__. ___ 10.0 %%%%%%%%%kk%yayayy+~aocaaaooo~%X%kX%%xk%X7~ SD 8787 -- - 25 8155 ^~ w i0 7277 ; .~i 1.0 y~~poocpocX'OO°p04o 5 , 6549 Cs ooooaooo~ ' ~ o Aredeueioped ' ~ ~ 10E-1 x Developed Mitigated z 597s c~ t3 ' 10E,2 ` • 1 10 20 30 d0 5D &0 7® SO 90 99 Cumulative Probabil' Yearly Peaks for Predeveloped Flow Frequency Chart YEAR fIQW (~? o Predeveloped 100 9+872 ~ .. ~ x Developed wdh Facility 50 --~------~ _ 8787 013 _~....wW_...a__......-.. ..... ..... ...._.____....._,._..._.~.._.._. ... 25 8155 10 .7277 ~ 0 57 ..~...,.~...~ ~...._ ~.~..~..._M. _ ._.~,~... ~... _.,.. 5 6549 v.. ..~,,, 042 ,_ ~ __~ _.__ . __ _ .. ~_. -_ a Q? 2 5376 ~ 02T _------ ___. ~_ __________ ...___._.~_ L t? M • O 10E-5 ' 10E-4 10E•3 10E•2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph TEAR Fl4W {cfs) 100 1138 50 7 701 25 5045 10 2.681 ~"" "".°`"-' 5 1518 , , 2 5459 arly Peaks for Developed W/Pond CLEARHIS BSN Al Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN Al 0 09 7 83 0 0297 0 33 SBUH/SCS TYPEIA 6 mo BSN Al 0 15 7 83 0 0495 0 33 SBUH/SCS TYPEIA 2 yr BSN Al 0 24 7 83 0 0772 0 33 SBUH/SCS TYPE1A 10 yr BSN Al 0 28 7 83 0 0911 0 33 SBUH/SCS TYPEIA 25 yr BSN Al 0 30 7 83 0 0980 0 33 SBUH/SCS TYPE1A 50 yr BSN Al 0 32 7 83 0 1050 0 33 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN Al Hyd Method. SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484 00 SCS Abs: 0.20 Storm Dur• 24.00 hrs Intv: 10.00 min Area CN TC Pervious 0 0000 ac 78 00 0 03 hrs Impervious 0 3346 ac 98.00 0 06 hrs Total 0 3346 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0 0000 ac Impervious CN Data: ROADWAY 98 00 0 2215 ac SIDWALK 98 00 0 0331 ac DRIVEWAY 98 00 0 0800 ac Pervious TC Data: Flow type' Description. Length: Slope: Coeff• Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type' Description Length. Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 240.00 ft 1.95% 27 0000 1 06 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0.40 min Channel Through Strom Water Pipe 150.00 ft 0 50% 21 0000 1.68 min Sheet Across Sidewalks 5 00 ft 2 00% 0 0110 0.14 min Sheet Across Driveway 20 00 ft 2 00% 0.0110 0.42 min BSN A2 Event Summary : BasmlD Peak Q Peak T Peak Vol Are a Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN A2 0 09 7 83 0 0287 0 32 SBUH/SCS TYPEIA 6 mo BSN A2 0 15 7 83 0 0478 0 32 SBUH/SCS TYPEIA 2 yr BSN A2 0 27 7 83 0 0880 0 32 SBUH/SCS TYPE1A 25 yr BSN A2 0 29 7 83 0 0947 0 32 SBUH/SCS TYPEIA 50 yr BSN A2 0 31 7 83 0 1015 0 32 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN A2 Hyd Method• SBUH Hyd Loss Method SCS CN Number Peak Factor 484.00 SCS Abs. 0 20 Storm Dur 24 00 hrs Inty: 10 00 min Area CN TC Pervious 0 0000 ac 78 00 0 03 hrs Impervious 0 3233 ac 98.00 0 06 hrs Total 0 3233 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description. Sheet Across Planter Strip Impervious TC Data: Flow type• Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN A3 Event Summary: BasinlD Peak O Event -- - (cfs) BSN A3 0 04 BSN A3 0 06 BSN A3 0 10 BSN A3 0 12 BSN A3 0 13 BSN A3 0 14 Yr 0 0000 ac 0 1937 ac 0.0263 ac 0 1033 ac Length: Slope: Coeff Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length' Slope: Coeff: Travel Time 225.00 ft 1.60% 27.0000 1.10 min 18.50 ft 2.00% 0 0110 0 40 min 150.00 ft 0 50% 21 0000 1 68 min 5.00 ft 2.00% 0.0110 0.14 min 20.00 ft 2 00% 0 0110 0.42 min Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0116 0.16 SBUH/SCS TYPEIA 6 mo 7 83 0 0201 0 16 SBUH/SCS TYPE1A 2 yr 7 83 0 0324 0 16 SBUH/SCS TYPE1A 10 yr 7 83 0 0387 0 16 SBUH/SCS TYPE1A 25 yr 7 83 0 0419 0 16 SBUH/SCS TYPEIA 50 yr 7 83 0 0450 0 16 SBUH/SCS TYPEIA 100 Drainage Area: BSN A3 Hyd Method. SBUH Hyd Peak Factor 484 00 Storm Dur. 24 00 hrs Area CN Pervious 0 0340 ac 78.00 Impervious 0.1265 ac 98 00 Total 0.1605 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Pervious TC Data: Flow type' Description• Sheet Across Planter Strip Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method• SCS CN Number SCS Abs: 0 20 Intv. 10.00 min TC 0 04 hrs 0.04 hrs 0 0340 ac 0 0333 ac 0.0932 ac Length Slope: Coeff Travel Time 7 00 ft 2 00% 0.2400 2.15 min Length Slope Coeff. Travel Time 125 00 ft 1 02% 27.0000 0.76 min 16 00 ft 2 00% 0.0110 0 35 min 80 00 ft 0 50% 21.0000 0 90 min 5.OOft 200% 00110 0.14 min BSN A4 Event Summary: BasinlD Peak O Event --- (cfs) BSN A4 0.22 BSN A4 0 36 BSN A4 0 55 BSN A4 0 65 BSN A4 0.70 BSN A4 0 75 yr Drainage Area: BSN A4 Hyd Method. SBUH Hyd Peak Factor: 484 00 Storm Dur: 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0718 0 81 SBUH/SCS TYPEIA 6 mo 7 83 0 1197 0 81 SBUH/SCS TYPEIA 2 yr 7 83 0 1868 0 81 SBUH/SCS TYPE1A 10 yr 7 83 0 2205 0 81 SBUH/SCS TYPE1A 25 yr 7 83 0 2373 0 81 SBUH/SCS TYPEIA 50 yr 7 83 0 2541 0 81 SBUH/SCS TYPE1A 100 Area CN Pervious 0.0000 ac 78 00 Impervious 0 8099 ac 98.00 Total 0.8099 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 Impervious TC Data: Flow type. Descnption• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs. 0.20 Intv: 10.00 min TC 0 00 hrs 0.08 hrs 0.0000 ac 0.5984 ac 0 2115 ac Length Slope: Coeff• Travel Time 200.00 ft 0 50% 27 0000 2.32 min 3300 ft 200% 00110 063 min 120 00 ft 0.50% 21.0000 1.35 min 12 00 ft 2.00% 0 0110 0 28 min ADDHYD [BSN A1] AS [6 mo] [BSN A2] AS [6 mo] TO [BSN Al +BSN A2] Peak Flow 0.1804 cfs Peak Time 7.83 hrs Hyd Vol. 2541 43 cf - 0 0583 acft ADDHYD [BSN A1] AS [2 yr] [BSN A2] AS [2 yr] TO [BSN Al +BSN A2] Peak Flow• 0 2995 cfs Peak Time: 7.83 hrs Hyd Vol• 4237 84 cf - 0.0973 acft ADDHYD [BSN A1] AS [10 yr] (BSN A2] AS [10 yr] TO [BSN Al +BSN AZ] Peak Flow• 0 4624 cfs Peak Time 7 83 hrs Hyd Vol• 6611.98 cf - 0 1518 acft ADDHYD (BSN A1] AS [25 yr] [BSN A2] AS [25 yr] TO [BSN Al +BSN A2] Peak Flow 0.5432 cfs Peak Time: 7 83 hrs Hyd Vol 7802.36 cf - 0 1791 acft ADDHYD [BSN A1] AS [50 yr] (BSN A2] AS [50 yr] TO [BSN Al +BSN A2] Peak Flow• 0.5834 cfs Peak Time 7 83 hrs Hyd Vol 8397 57 cf - 0.1928 acft ADDHYD (BSN A1] AS [100 yr] [BSN A2] AS [100 yr] TO (BSN Al +BSN A2] Peak Flow 0 6237 cfs Peak Time. 7 83 hrs Hyd Vol• 8992 93 cf - 0 2064 acft ADDHYD [BSN A3] AS [6 mo] [BSN A4] AS (6 mo] TO [BSN A3 +BSN A4] Peak Flow• 0 2522 cfs Peak Time• 7 83 hrs Hyd Vol• 3634 73 cf - 0 0834 acft ADDHYD [BSN A3] AS [2 yr] [BSN A4] AS (2 yr] TO [BSN A3 +BSN A4] Peak Flow: 0 4204 cfs Peak Time• 7.83 hrs Hyd Vol• 6091 00 cf - 0 1398 acft ADDHYD [BSN A3] AS [10 yr] [BSN A4] AS [10 yr] TO [BSN A3 +BSN A4] Peak Flow• 0.6538 cfs Peak Time• 7 83 hrs Hyd Vol: 9549 42 cf - 0 2192 acft ADDHYD [BSN A3] AS [25 yr] [BSN A4] AS [25 yr] TO [BSN A3 +BSN A4] Peak Flow. 0 7701 cfs Peak Time 7 83 hrs Hyd Vol: 11289.01 cf - 0 2592 acft ADDHYD [BSN A3] AS [50 yr] [BSN A4] AS [50 yr] TO [BSN A3 +BSN A4] Peak Flow: 0 8282 cfs Peak Time 7.83 hrs Hyd Vol. 12159.91 cf - 0.2792 acft ADDHYD [BSN A3] AS [100 yr] [BSN A4] AS [100 yr] TO [BSN A3 +BSN A4] Peak Flow: 0 8862 cfs Peak Time 7.83 hrs Hyd Vol: 13031 54 cf - 0 2992 acft ADDHYD [BSN Al +BSN A2] AS [6 mo] [BSN A3 +BSN A4] AS [6 mo] TO [BSN Al +BSN q2+BSNA3+BSNA4] Peak Flow• 0.4326 cfs Peak Time 7 83 hrs Hyd Vol. 6176.16 cf - 0.1417 acft ADDHYD [BSN Al +BSN A2] AS (2 yr] [BSN A3 +BSN A4] AS [2 yr] TO [BSN Al +BSN A2 +BSN A3 +BSN A4] Peak Flow 0 7199 cfs Peak Time 7 83 hrs Hyd Vol: 10328 08 cf - 0 2371 acft ADDHYD [BSN Al +BSN A2] AS [10 yr] [BSN A3 +BSN A4] AS [10 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4) Peak Flow 1 1162 cfs Peak Time• 7 83 hrs Hyd Vol: 16160 76 cf - 0.371 acft ADDHYD [BSN Al +BSN A2] AS [25 yr] [BSN A3 +BSN A4] AS [25 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow• 1 3133 cfs Peak Time 7 83 hrs Hyd Vol: 19092 35 cf - 0 4383 acft ADDHYD [BSN Al +BSN A2] AS [50 yr] [BSN A3 +BSN A4] AS [50 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow• 1 4116 cfs Peak Time 7 83 hrs Hyd Vol• 20560 32 cf - 0.4720 acft ADDHYD [BSN Al +BSN A2] AS [100 yr] [BSN A3 +BSN A4] AS [100 yr] TO [BSN Al + BSN A2 +BSN A3 +BSN A4] Peak Flow 1.5099 cfs Peak Time: 7 83 hrs Hyd Vol. 22024 46 cf - 0 5056 acft MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow• 0 4326 cfs Peak Time 7 83 hrs Hyd Vol: 6176 16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 2 yr] AS [2 yr] Peak Flow: 0 7199 cfs Peak Time. 7 83 hrs Hyd Vol. 10328 08 cf - 0 2371 acft MOVEHYD [BASIN A] TO [BASIN A - 10 yr] AS (10 yr] Peak Flow 1 1162 cfs Peak Time 7 83 hrs Hyd Vol• 16160.76 cf - 0 3710 acft MOVEHYD [BASIN A] TO [BASIN A - 25 yr] AS [25 yr] Peak Flow 1 3133 cfs Peak Time 7 83 hrs Hyd Vol. 22024.46 cf - 0 4383 acft MOVEHYD [BASIN A] TO [BASIN A - 50 yr] AS [50 yr] Peak Flow 1 4116 cfs Peak Time 7 83 hrs Hyd Vol 20560 32 cf - 0 4720 acft MOVEHYD (BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow: 1 5099 cfs Peak Time 7 83 hrs Hyd Vol: 22024.46 cf - 0.5056 acft Hydrograph ID: BASIN A - 100 yr Area. 1 6283 ac Hyd Int: 10 00 mm Base Flow. Peak Flow 1 5099 cfs Peak Time: 7.83 hrs Hyd Vol: 0.5056 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0057 8 67 0 5989 16 33 0 1952 0 83 0.0215 8 83 0 5074 16 50 0.1952 1 00 0 0394 9 00 0 5176 16 67 0 1953 1 17 0 0595 9 17 0.4440 16 83 0 1953 1 33 0 0785 9 33 0 3816 17 00 0.1953 1 50 0 0908 9 50 0 3888 17 17 0 1880 1 67 0 1057 9 67 0.3659 17 33 0 1817 1 83 0.1189 9 83 0 3475 17 50 0 1824 2 00 0 1268 10 00 0 3496 17 67 0 1823 2 17 0 1390 10 17 0 3277 17 83 0 1824 2 33 0 1499 10 33 0 3089 18 00 0 1824 2 50 0 1551 10 50 0 3111 18 17 0 1751 2 67 0.1601 10 67 0 2963 18 33 0 1687 2 83 0 1642 10 83 0.2839 18 50 0.1695 3 00 0 1679 11 00 0 2853 18 67 0 1693 3 17 0 1711 11 17 0 2779 18 83 0 1694 3 33 0 1739 11 33 0 2717 19 00 0 1694 3 50 0 1763 11 50 0 2724 19 17 0 1621 3 67 0 1848 11 67 0 2651 19 33 0 1558 3 83 0 1924 11 83 0 2589 19 50 0 1565 4 00 0 1938 12 00 0 2596 19 67 0 1564 4 17 0 2086 12.17 0 2523 19.83 0 1564 4 33 0 2217 12 33 0 2460 20 00 0 1564 4 50 0 2222 12 50 0 2468 20 17 0 1564 4 67 0 2372 12 67 0 2394 20.33 0 1564 4 83 0 2502 12 83 0 2331 20 50 0 1564 . 5 00 0 2507 13 00 0 2339 20 67 0 1564 5 17 0 2658 13 17 0 2338 20 83 0 1564 5 33 0 2790 13 33 0 2338 21 00 0 1565 5 50 0 2791 13 50 0 2339 21 17 0 1565 5 67 0 2943 13 67 0 2266 21 33 0 1565 5 83 0 3075 13 83 0 2203 21 50 0 1565 6 00 0 3074 14 00 0 2211 21 67 0 1565 6 17 0 3364 14 17 0 2210 21 83 0 1565 6 33 0 3618 14 33 0 2210 22 00 0 1565 . 6 50 0 3604 14 50 0 2210 22.17 0 1492 6 67 0 4038 14 67 0 2138 22 33 0 1429 6 83 0 4416 14 83 0 2075 22 50 0 1436 7 00 0 4389 15 00 0.2082 22 67 0 1435 7 17 0 4901 15 17 0 2081 22 83 0 1435 7 33 0 5344 15 33 0 2081 23 00 0 1435 7 50 0 5310 15 50 0 2082 23 17 0 1435 7 67 1 0520 15 67 0 2009 23 33 0 1435 7 83 1 5099 15 83 0 1946 23 50 0 1435 8 00 1 4651 16 00 0 1953 23 67 0 1435 8 17 1 0480 16 17 0 1952 23 83 0 1435 8 33 0 6707 16 33 0 1952 24 00 0 1435 8 50 0 7149 16 50 0 1952 24 17 0 0632 MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow: 0 4326 cfs Peak Time: 7.83 hrs Hyd Vol: 6176.16 cf - 0.1417 acft MOVEHYD [BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow 1 5099 cfs Peak Time 7 83 hrs Hyd Vol: 22024.46 cf - 0.5056 acft Control Structure ID: Infiltration -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 330.0000 ft 335.7000 ft 0.10 Infil: 10.00 in/hr Multiplier. 1.00 Reach ID: BIOSWALE A Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 300.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh~1v Up Node Dn Node Up Invert dummy A 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov 0 5000 ft 1.0000 ft 3.0000 ft In/Exfil Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0 000000 ft 0 000000 ft Routing Method. Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh:1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0.0000 ft ROUTEHYD (BASIN A - 6 mo] THRU [BIOSWALE A USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ft/s ft/s ac cfs cfs ratio ft ---- '------'-' BIOSWALE A 1 6283 0 4326 ---- 1 00 0 0864 Ditch 0 5724 ----- BASIN A ROUTEHYD [BASIN A -100 yr] THRU [BIOSWALE A] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BiOSWALE A 1 6283 1 5099 ---- 1 00 0 1873 Ditch 0 9411 ----- BASIN A Node ID: INFILTRATION A Desc. Manhole structure Start EI 335 7000 ft Max EI: 336 7000 ft Contnb Basin Contnb Hyd' Length Width Void Ratio 300 0000 ft 10.0000 ft 39 00 Node ID: BASIN A RLP Desc: Manhole structure Start EI: Contnb Basin: Storage Id: 335.7000 ft INFILTRATION A Max EI~ Contnb Hyd: Discharge Id 336 7000 ft Infiltration RLPCOMPUTE [BASIN A RLPJ SUMMARY 100 yr MatchO=PeakO= 1.5099 cfs Peak Out O' 1 0773 cfs -Peak Stg: 336 75 ft -Active Vol: 2753.12 cf ` WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -A Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/19/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin A Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 DEVELOPED LAND USE Basin Basin A Flows To Bio-Infiltration Swale A Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.82 IMPERVIOUS: 2.14 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale A Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. lei mansions Depth: aft. Bottom Length: 300ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.040 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 335.2 0.069 0.000 0.000 0.000 335.3 0.072 0.005 0.000 0.694 335.4 0.075 0.011 0.000 0.694 335.4 0.079 0.017 0.000 0.694 335.5 C.082 0.023 0.000 0.694 ~~gF,P}~ Dq ~ ~cF wasy't ~1~~ ~~ t ^ $ ~ ~ ''. s ~, ~s ~ ,,.~-ems 33.6 0.085 0.030 0.000 0.694 335.7 0.089 0.037 0.000 0.694 335.7 0.092 0.044 0.411 0.694 335.8 0.095 0.051 1.873 0.694 335.9 0.099 0.059 3.920 0.694 336.0 0.102 0.066 6.416 0.694 336.1 O.i05 0.074 9.292 0.694 336.1 0.109 0.083 12.50 0.694 336.2 0.112 0.091 16.01 0.694 336.3 0.115 0.100 19.81 0.694 336.4 0.119 0.109 23.86 0.694 336.4 0.122 0.119 28.15 0.694 336.5 0.125 0.128 32.67 0.694 336.6 0.129 0.138 37.42 0.694 336.7 0.132 0.148 42.37 0.694 336.8 0.135 0.159 47.53 0.694 336.8 0.139 0.169 52.88 0.694 336.9 0.142 0.180 58.41 0.694 337.0 0.146 0.191 64.13 0.694 337.1 0.149 0.203 70.02 0.694 337.1 0.152 0.215 76.08 0.694 337.2 0.156 0.226 82.31 0.694 337.3 0.159 0.239 88.70 0.694 337.4 0.163 0.251 95.24 0.694 337.5 0.166 0.264 101.9 0.694 337.5 0.169 0.277 108.8 0.694 337.6 O.i73 0.290 115.8 0.694 337.7 0.176 0.304 122.9 0.694 337.8 0.180 0.318 130.2 0.694 337.8 0.183 0.332 137.6 0.694 337.9 0.187 0.346 145.2 0.694 338.0 0.190 0.361 152.9 0.694 338.1 0.194 0.376 160.7 0.694 338.2 0.197 0.391 168.6 0.694 338.2 0.200 0.406 176.7 0.694 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Pera.ods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.537604 5 year 0.65489 10 year 0.727651 25 year 0.815532 50 year 0.878677 100 year 0.940225 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated •- Year Predeveloped Developed 1956 0.509 0.000 1957 0.820 0.000 1958 0.471 0.000 1959 0.550 0.000 1960 0.605 0.000 1961 0.403 0.000 1962 0.434 0.000 1963 0.875 0.000 1964 0.633 0.000 1965 0.595 0.000 1966 0.418 0.000 1967 0.512 0.000 1968 0.401 0.000 1969 0.396 0.000 1970 0.395 0.000 1971 0.491 0.000 1972 0.590 0.000 1973 0.465 0.000 1974 0.541 0.000 1975 0.469 0.000 1976 0.540 0.000 1977 0.683 0.000 1978 0.581 0.000 1979 0.691 0.000 1980 0.518 0.000 1981 0.593 0.000 1982 0.685 0.000 1983 0.734 0.000 1984 0.448 0.000 1985 0.518 0.000 1986 0.577 0.000 1987 0.621 0.000 lggg 0.343 0.000 1989 0.411 0.000 1990 0.809 0.000 1991 0.823 0.000 1992 0.504 0.000 1993 0.369 0.000 1994 0.410 0.000 1995 0.594 0.000 1996 0.603 0.000 1997 0.486 0.000 1998 0.681 0.000 1999 0.585 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8229 0.0000 2 0.8196 0.0000 3 0.8087 0.0000 4 0.7336 0.0000 5 0.6911 0.0000 6 0.6853 0.0000 7 0.6834 0.0000 8 0.6811 0.0000 9 0.6328 0.0000 10 0.6206 0.0000 11 0.6050 0.0000 12 0.6034 0.0000 13 0.5947 0.0000 14 0.5945 0.0000 15 0.5933 0.0000 16 0.5895 0.0000 17 0.5850 0.0000 18 0.5806 0.0000 19 0.5768 0.0000 20 0.5497 0.0000 21 ~ 0.5414 0.0000 22 0.5405 0.0000 23 0.5183 0.0000 24 0.5177 0.0000 25 0.5120 0.0000 26 0.5086 0.0000 27 0.5042 0.0000 28 0.4913 0.0000 29 0.4862 0.0000 30 0.4708 0.0000 31 0.4690 0.0000 32 0.4649 0.0000 33 0.4477 0.0000 34 0.4342 0.0000 35 0.4181 0.0000 36 0.4105 0.0000 37 0.4105 0.0000 38 0.4034 0.0000 39 0.4008 0.0000 40 0.3959 0.0000 41 0.3953 0.0000 42 0.3694 0.0000 43 0.3431 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2688 1049 0 .0 Pass 0.2750 981 0 .0 Pass 0.2811 904 0 .0 Pass 0.2873 835 0 .0 Pass 0.2934 785 0 .0 Pass 0.2996 717 0 .0 Pass 0.3058 669 0 .0 Pass 0.3119 624 0 .0 Pass 0.3181 576 0 .0 Pass 0.3242 533 0 .0 Pass 0.3304 499 0 .0 Pass 0.3366 458 0 .0 Pass 0.3427 433 0 .0 Pass 0.3489 397 0 .0 Pass 0.3550 355 0 .0 Pass 0.3612 336 0 .0 Pass 0.3674 315 0 .0 Pass 0.3735 296 0 .0 Pass 0.3797 278 0 .0 Pass 0.3858 254 0 .0 Pass 0.3920 237 0 .0 Pass 0.3982 218 0 .0 Pass 0.4043 199 0 .0 Pass 0.4105 189 0 .0 Pass 0.4167 172 0 .0 Pass 0.4228 167 0 .0 Pass 0.4290 161 0 .0 Pass 0.4351 154 0 .0 Pass 0.4413 146 0 .0 Pass 0.4475 142 0 .0 Pass 0.4536 138 0 .0 Pass 0.4598 136 0 .0 Pass 0.4659 123 0 .0 Pass 0.4721 116 0 .0 Pass 0.4783 107 0 .0 Pass 0.4844 103 0 .0 Pass 0.4906 98 0 .0 Pass 0.4967 91 0 .0 Pass 0.5029 87 0 .0 Pass 0.5091 80 0 .0 Pass 0.5152 74 0 .0 Pass 0.5214 68 0 .0 Pass 0.5275 66 0 .0 Pass 0.5337 60 0 .0 Pass 0.5399 59 0 .0 Pass 0.5460 54 0 .0 Pass 0.5522 50 0 .0 Pass 0.5583 46 0 .0 Pass 0.5645 46 0 .0 Pass 0.5707 41 0 .0 Pass 0.5768 38 0 .0 Pass 0.5830 36 0 .0 Pass 0.5891 32 0 .0 Pass 0.5953 26 0 .0 Pass 0.6015 26 0 .0 Pass 0.6076 23 0 .0 Pass 0.6138 23 0 .0 Pass 0.6199 20 0 .0 Pass 0.6261 19 0 .0 Pass 0.6323 17 0 .0 Pass 0.6384 16 0 .0 Pass 0.6446 16 0 .0 Pass 0.6507 16 0 .0 Pass 0.6569 15 0 .0 Pass 0.6631 14 0 .0 Pass 0.6692 12 0 .0 Pass 0.6754 12 0 .0 Pass 0.6815 12 0 .0 Pass 0.6877 9 0 .0 Pass 0.6939 8 0 .0 Pass 0.7000 8 0 .0 Pass 0.7062 8 0 .0 Pass 0.7123 8 0 .0 Pass 0.7185 8 0 .0 Pass 0.7247 6 0 .0 Pass 0.7308 6 0 .0 Pass 0.7370 5 0 .0 Pass 0.7431 5 0 .0 Pass 0.7493 5 0 .0 Pass 0.7555 5 0 .0 Pass 0.7616 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7740 5 0 .0 Pass 0.7801 5 0 .0 Pass 0.7863 5 0 .0 Pass 0.7924 5 0 .0 Pass 0.7986 5 0 .0 Pass 0.8048 5 0 .0 Pass 0.8109 4 0 .0 Pass 0.8171 4 0 .0 Pass 0.8232 1 0 .0 Pass 0.8294 1 0 .0 Pass 0.8356 1 0 .0 Pass 0.8417 1 0 .0 Pass 0.8479 1 0 .0 Pass 0.8540 1 0 .0 Pass 0.8602 1 0 .0 Pass 0.8664 1 0 .0 Pass 0.8725 1 0 .0 Pass 0.8787 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 c£s. Off-line facility target flow: 0 c£s. Adjusted for 15 min: 0 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regardin the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Sta Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damag for loss of business profits, loss of business information, business interruption, and the like) arising out of th user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. it'EJ!~ FLOtU{t1s) 1QD xxxxxxxxxxxxK~C4o-!~at~a~3o~oaooocxxxxxxxkkxxk 100 9902 - - - --- 50 8787 °°°-~°--'- , 25 8155 ' 10 7277 ~ "' 1_D „~,,,, o00 ~a,~pooo 0 ° 5 6549 N ~ooobvoc~ ' ~ o PredeUetoped ' _ ~ y0E-1 ~ x DeUeloped Aiitigated 2 _SS7s ~ ~, ~ << ` ~ _ 10E-2 3 1 1D 20 3D d{I 30 60 7D SD 90 99 Cumulative Probabil' Yearly Peaks for Predeveloped Flow Frequency Chart TEM FLOW{cfsi o Predeveloped 100 8402 ~ x Developed wdh Faral~ty 50 8787 --~-•------~r ~ 013 •_~._.~A_~._ ...• .u....e, _ ~• ..._.~._.._-v.~.w...~ 25 8155 10 .7277 ~ 057 .~..~. ~......~...•.~..~.... ~.,_ ~..._.._..~.~~..a•~_ 5 5543 „V,~ 0 q2 .._. _ ~ . _ . _ __ __~ ~. Q1 2 5376 ~ 027 _._ ~_____ _. _ ~ ~__• ~...,~ L V ~ _ i i 10E•5 ~ 10E-4 10E•3 1QE-2 10E•1 1 10 , Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR FLOW (~) 100 11 38 50 1701 25 5 045 ~ - , 10 2 681 `°•'~ 5 1-518 _ 2 5459 (early Peaks for Developed W/Pontl CLEARHIS BSN Al Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN Al 0 09 7 83 BSN Al 0 15 7 83 BSN Al 0 24 7 83 BSN Al 0 28 7 83 BSN Al 0 30 7 83 BSN Al 0 32 7 83 yr Drainage Area: BSN Al Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur 24.00 hrs Area CN Pervious 0.0000 ac 78 00 Impervious 0 3346 ac 98.00 Total 0 3346 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type Descnption• Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN A2 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN A2 0 09 7 83 BSN A2 0 15 7 83 BSN A2 0 27 7 83 BSN A2 0 29 7 83 BSN A2 0 31 7 83 yr Drainage A rea: BSN A2 Hyd Method SBUH Hyd Peak Factor. 484 00 Storm Dur 24.00 hrs Area CN Pervious 0 0000 ac 78.00 Impervious 0 3233 ac 98.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0297 0 33 SBUH/SCS TYPE1A 6 mo 0 0495 0 33 SBUH/SCS TYPE1A 2 yr 0 0772 0 33 SBUH/SCS TYPE1A 10 yr 0 0911 0 33 SBUH/SCS TYPEIA 25 yr 0 0980 0 33 SBUH/SCS TYPE1A 50 yr 0.1050 0 33 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs. 0.20 Intv. 10 00 min TC 0.03 hrs 0 06 hrs 0.0000 ac 0.2215 ac 0 0331 ac 0 0800 ac Length. Slope. Coeff Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length Slope• Coeff• Travel Time 240 00 ft 1 95% 27 0000 1 06 min 18 50 ft 2 00% 0.0110 0.40 min 150.00 ft 0 50% 21 0000 1 68 min 5 00 ft 2 00% 0.0110 0 14 min 20 00 ft 2 00% 0 0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0287 0 32 SBUH/SCS TYPEIA 6 mo 0 0478 0 32 SBUH/SCS TYPEIA 2 yr 0 0880 0 32 SBUH/SCS TYPE1A 25 yr 0 0947 0 32 SBUH/SCS TYPEIA 50 yr 0 1015 0 32 SBUH/SCS TYPEIA 100 Loss Method• SCS CN Number SCS Abs. 0 20 Intv: 10 00 min TC 0 03 hrs 0 06 hrs Total 0 3233 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0000 ac Impervious CN Data: ROADWAY 98 00 0 1937 ac SIDWALK 98.00 0 0263 ac DRIVEWAY 98 00 0.1033 ac Pervious TC Data: Flow type: Description. Length Slope: Coeff' Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type Description• Length: Slope: Coeff Travel Time Shallow Along Flow Line of Gutter 225.00 ft 1 60% 27 0000 1 10 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 150.00 ft 0.50% 21 0000 1 68 min Sheet Across Sidewalks 5.00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20.00 ft 2.00% 0.0110 0 42 min BSN A3 Event Summary: BasinlD Peak O Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN A3 0 04 7 83 0 0116 0 16 SBUH/SCS TYPEIA 6 mo BSN A3 0 06 7 83 0 0201 0.16 SBUH/SCS TYPEIA 2 yr BSN A3 0 10 7 83 0 0324 0 16 SBUH/SCS TYPEIA 10 yr BSN A3 0 12 7 83 0 0387 0 16 SBUH/SCS TYPE1A 25 yr BSN A3 0 13 7 83 0 0419 0 16 SBUH/SCS TYPEIA 50 yr BSN A3 0 14 7 83 0 0450 0 16 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN A3 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur• 24 00 hrs Area CN Pervious 0 0340 ac 78 00 Impervious 0.1265 ac 98 00 Total 0.1605 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type' Description• Sheet Across Planter Strip Impervious TC Data: Flow type Descnption• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10 00 min TC 0.04 hrs 0 04 hrs 0.0340 ac 0 0333 ac 0 0932 ac Length: Slope Coeff Travel Time 7.00 ft 2.00% 0.2400 2.15 min Length Slope: Coeff Travel Time 125 00 ft 1 02% 27 0000 0 76 min 16 00 ft 2.00% 0 0110 0.35 min 80 00 ft 0 50% 21 0000 0.90 min 500 ft 200% 00110 014 min BSN A4 Event Summary: BasinlD Peak O Event (cfs) BSN A4 0 22 BSN A4 0 36 BSN A4 0 55 BSN A4 0 65 BSN A4 0 70 BSN A4 0 75 yr Drainage Area: BSN A4 Hyd Method. SBUH Hyd Peak Factor 484 00 Storm Dur• 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8.00 0 0718 0 81 SBUHISCS TYPEIA 6 mo 7 83 0 1197 0 81 SBUH/SCS TYPE1A 2 yr 7.83 0 1868 0.81 SBUH/SCS TYPEIA 10 yr 7 83 0 2205 0 81 SBUH/SCS TYPE1A 25 yr 7 83 0 2373 0.81 SBUH/SCS TYPEIA 50 yr 7 83 0.2541 0 81 SBUH/SCS TYPEIA 100 Area CN Pervious 0.0000 ac 78 00 Impervious 0 8099 ac 98.00 Total 0.8099 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10.00 min TC 0.00 hrs 0.08 hrs 0.0000 ac 0.5984 ac 0 2115 ac Length. Slope Coeff Travel Time 200 00 ft 0 50% 27 0000 2.32 min 33.00 ft 2 00% 0 0110 0.63 min 120 00 ft 0 50% 21 0000 1.35 min 12.00 ft 2.00% 0 0110 0 28 min ADDHYD [BSN A1] AS [6 mo] [BSN AZ] AS [6 mo] TO [BSN Al +BSN A2] Peak Flow• 0 1804 cfs Peak Time: 7.83 hrs Hyd Vol• 2541.43 cf - 0.0583 acft ADDHYD [BSN A1] AS [2 yr] [BSN AZ] AS [2 yr] TO [BSN Al +BSN A2] Peak Flow• 0 2995 cfs Peak Time: 7.83 hrs Hyd Vol. 4237 84 cf - 0.0973 acft ADDHYD [BSN A1] AS [10 yr] (BSN A2] AS [10 yr] TO [BSN Al +BSN A2] Peak Flow• 0 4624 cfs Peak Time: 7 83 hrs Hyd Vol. 6611.98 cf - 0 1518 acft ADDHYD [BSN A1] AS [25 yr] [BSN A2] AS [25 yr] TO [BSN Al +BSN A2] Peak Flow• 0.5432 cfs Peak Time. 7.83 hrs Hyd Vol. 7802.36 cf - 0.1791 acft ADDHYD [BSN A1] AS [50 yr] [BSN A2] AS [50 yr] TO [BSN Al +BSN AZ] Peak Flow 0 5834 cfs Peak Time. 7 83 hrs Hyd Vol 8397 57 cf - 0 1928 acft ADDHYD [BSN A1] AS [100 yr] [BSN A2] AS [100 yr] TO [BSN Al +BSN A2] Peak Flow• 0 6237 cfs Peak Time. 7 83 hrs Hyd Vol 8992.93 cf - 0 2064 acft ADDHYD [BSN A3] AS [6 mo] [BSN A4] AS [6 mo] TO [BSN A3 +BSN A4] Peak Flow• 0 2522 cfs Peak Time 7 83 hrs Hyd Vol: 3634.73 cf - 0 0834 acft ADDHYD (BSN A3] AS [2 yr] [BSN A4] AS [2 yr] TO [BSN A3 +BSN A4] Peak Flow. 0.4204 cfs Peak Time: 7 83 hrs Hyd Vol• 6091 00 cf - 0 1398 acft ADDHYD [BSN A3] AS [10 yr] [BSN A4] AS [10 yr] TO [BSN A3 +BSN A4] Peak Flow• 0 6538 cfs Peak Time. 7 83 hrs Hyd Vol 9549 42 cf - 0 2192 acft ADDHYD [BSN A3] AS [25 yr] [BSN A4j AS [25 yr] TO [BSN A3 +BSN A4] Peak Flow 0.7701 cfs Peak Time• 7 83 hrs Hyd Vol. 11289 01 cf - 0 2592 acft ADDHYD [BSN A3] AS [50 yr] [BSN A4] AS [50 yr] TO [BSN A3 +BSN A4] Peak Flow. 0.8282 cfs Peak Time 7 83 hrs Hyd Vol 12159 91 cf - 0 2792 acft ADDHYD [BSN A3] AS [100 yr] [BSN A4] AS [100 yr] TO [BSN A3 +BSN A4] Peak Flow: 0.8862 cfs Peak Time: 7 83 hrs Hyd Vol• 13031.54 cf - 0 2992 acft ADDHYD [BSN Al +BSN AZ] AS [6 mo] [BSN A3 +BSN A4] AS [6 mo] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow• 0 4326 cfs Peak Time: 7 83 hrs Hyd Vol 6176 16 cf - 0 1417 acft ADDHYD [BSN Al +BSN A2] AS [2 yr] [BSN A3 +BSN A4] AS [2 yr] TO [BSN Al +BSN A2 +BSN A3 +BSN A4] Peak Flow: 0 7199 cfs Peak Time• 7 83 hrs Hyd Vol• 10328 08 cf - 0.2371 acft ADDHYD [BSN Al +BSN A2] AS [10 yr] [BSN A3 +BSN A4] AS [10 yr] TO [BSN Al +BSN q2 +BSN A3 +BSN A4] Peak Flow. 1.1162 cfs Peak Time: 7 83 hrs Hyd Vol 16160 76 cf - 0.371 acft ADDHYD [BSN Al +BSN A2] AS [25 yr] [BSN A3 +BSN A4] AS [25 yr] TO [BSN Al +BSN A2 +BSN A3 +BSN A4] Peak Flow• 1 3133 cfs Peak Time: 7.83 hrs Hyd Vol• 19092.35 cf - 0 4383 acft ADDHYD (BSN Al +BSN AZ] AS [50 yr] [BSN A3 +BSN A4] AS (50 yr] TO [BSN Al +BSN A2+BSNA3+BSNA4] Peak Flow 1 4116 cfs Peak Time: 7 83 hrs Hyd Vol 20560 32 cf - 0.4720 acft ADDHYD [BSN Al +BSN A2] AS [100 yr] [BSN A3 +BSN A4] AS [100 yr] TO (BSN Al + BSN A2 +BSN A3 +BSN A4] Peak Flow 1 5099 cfs Peak Time. 7 83 hrs Hyd Vol 22024 46 cf - 0 5056 acft MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow: 0.4326 cfs Peak Time: 7 83 hrs Hyd Vol 6176 16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 2 yr] AS [2 yr] Peak Flow. 0 7199 cfs Peak Time. 7 83 hrs Hyd Vol. 10328 08 cf - 0.2371 acft MOVEHYD [BASIN A] TO [BASIN A - 10 yr] AS [10 yr] Peak Flow 1 1162 cfs Peak Time. 7 83 hrs Hyd Vol 16160.76 cf - 0 3710 acft MOVEHYD [BASIN A] TO [BASIN A - 25 yr] AS [25 yr] Peak Flow 1 3133 cfs Peak Time• 7 83 hrs Hyd Vol 22024 46 cf - 0 4383 acft MOVEHYD [BASIN A] TO [BASIN A - 50 yr] AS [50 yr] Peak Flow. 1 4116 cfs Peak Time• 7 83 hrs Hyd Vol 20560 32 cf - 0 4720 acft MOVEHYD [BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow: 1 5099 cfs Peak Time. 7 83 hrs Hyd Vol: 22024.46 cf - 0 5056 acft Hydrograph ID: BASIN A - 100 yr Area: 1 6283 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 1 5099 cfs Peak Time: 7 83 hrs Hyd Vol: 0.5056 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0057 8 67 0.5989 16 33 0.1952 0 83 0 0215 8 83 0.5074 16 50 0 1952 1 00 0 0394 9 00 0 5176 16 67 0.1953 1 17 0 0595 9 17 0 4440 16.83 0.1953 1 33 0 0785 9 33 0 3816 17 00 0.1953 1 50 0 0908 9 50 0 3888 17 17 0.1880 1 67 0 1057 9 67 0 3659 17 33 0.1817 1 83 0 1189 9 83 0 3475 17 50 0 1824 2 00 0 1268 10.00 0 3496 17 67 0 1823 17 2 0.1390 10 17 0 3277 17 83 0 1824 . 2 33 0 1499 10 33 0 3089 18 00 0 1824 50 2 0 1551 10 50 0.3111 18 17 0 1751 . 2 g7 0 1601 10 67 0 2963 18.33 0 1687 2 83 0 1642 10 83 0 2839 18 50 0 1695 3 00 0 1679 11 00 0 2853 18 67 0 1693 3 17 0 1711 11 17 0 2779 18 83 0 1694 3 33 0 1739 11 33 0 2717 19 00 0 1694 3 50 0 1763 11 50 0 2724 19 17 0 1621 3 67 0 1848 11 67 0 2651 19 33 0 1558 3 83 0 1924 11 83 0 2589 19 50 0 1565 4 00 0 1938 12 00 0 2596 19.67 0 1564 4 17 0 2086 12 17 0 2523 19 83 0 1564 4 33 0 2217 12 33 0 2460 20 00 0.1564 4 50 0 2222 12 50 0 2468 20 17 0 1564 4 67 0 2372 12 67 0 2394 20 33 0 1564 4 83 0 2502 12 83 0 2331 20 50 0 1564 5 00 0 2507 13 00 0 2339 20 67 0 1564 5 17 0 2658 13 17 0 2338 20 83 0 1564 5 33 0 2790 13 33 0 2338 21 00 0 1565 5 50 0 2791 13 50 0 2339 21 17 0 1565 5 67 0 2943 13 67 0 2266 21 33 0 1565 5 83 0 3075 13 83 0 2203 21.50 0 1565 6 00 0 3074 14 00 0 2211 21 67 0 1565 6 17 0 3364 14 17 0 2210 21 83 0 1565 6 33 0 3618 14 33 0 2210 22 00 0 1565 6 50 0 3604 14 50 0 2210 22 17 0 1492 6 67 0 4038 14 67 0 2138 22 33 0 1429 6 83 0 4416 14 83 0 2075 22 50 0 1436 7 00 0 4389 15 00 0 2082 22 67 0 1435 7 17 0 4901 15 17 0 2081 22.83 0 1435 7 33 0 5344 15 33 0 2081 23 00 0 1435 7 50 0.5310 15 50 0 2082 23 17 0 1435 7 g7 1 0520 15 67 0 2009 23 33 0.1435 7 g3 1 5099 15 83 0 1946 23 50 0 1435 8 00 1 4651 16.00 0 1953 23 67 0 1435 g 17 1 0480 16 17 0 1952 23 83 0 1435 8 33 0 6707 16 33 0 1952 24 00 0 1435 8 50 0 7149 16 50 0 1952 24 17 0 0632 MOVEHYD [BASIN A] TO [BASIN A - 6 mo] AS [6 mo] Peak Flow: 0 4326 cfs Peak Time: 7 83 hrs Hyd Vol• 6176.16 cf - 0 1417 acft MOVEHYD [BASIN A] TO [BASIN A - 100 yr] AS [100 yr] Peak Flow• 1.5099 cfs Peak Time: 7 83 hrs Hyd Vol. 22024.46 cf - 0 5056 acft Control Structure ID: Infiltration -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 330 0000 ft 335 7000 ft 0 10 Infll~ 10 00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE A Section Properties: Shape Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 300 0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3.OOh~1v Up Node Dn Node Up Invert dummy A 0.0000 ft Conduit Cons traints: Min Vel Max Vel Mln Cov 0 5000 ft 1.0000 ft 3 0000 ft In/Exfll Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trlb Area Flow Capacity 0 0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Fnct Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Tlme Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh 1 v Dn Invert 0 0000 ft Mln Slope Max Slope Min drop 0.5000 ft 2 0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN A - 6 mo] THRU [BIOSWALE A USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ft/s ft/s ac cfs cfs ratio ft ---- ----°'-° BIOSWALE A 1 6283 0 4326 ---- 1 00 0 0864 Ditch 0 5724 ----- BASIN A ROUTEHYD [BASIN A - 100 yr] THRU [BIOSWALE A] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ft/s ft/s ac cfs cfs ratio ft ---- °-°-°'- BiOSWALE A 1 6283 1 5099 ---- 1.00 0 1873 Ditch 0 9411 ----- BASIN A Node ID: INFILTRATION A Desc~ Manhole structure Start EI 335.7000 ft Contrib Basin. Length W Idth 300 0000 ft 10 0000 ft Max EI~ 336.7000 ft Contrib Hyd: Vold Ratio 39 00 Node ID: BASIN A RLP Desc Manhole structure Start EI 335 7000 ft Max EI: 336.7000 ft Contnb Basin: Contrib Hyd: Storage Id: INFILTRATION A Discharge Id: Infiltration RLPCOMPUTE [BASIN A RLP] SUMMARY 100 yr MatchO=Peak0= 1.5099 cfs Peak Out Q: 1 0773 cfs -Peak Stg: 336.75 ft -Active Vol 2753.12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -O Site Address: Tahoma Terra, LLC Ca.ty Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin O Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 DEVELOPED LAND USE Basin Basin O Flows To Bio-Infiltration Swale O Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale O Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Tl~.nerci nnc Depth: aft. Bottom Length: 200ft. Bottom Width : loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.027 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) In£ilt(cfs) 330.8 0.046 0.000 0.000 0.000 330.9 0.048 0.009 0.000 0.463 331.0 0.050 0.007 0.000 0.463 331.0 0.053 0.01?_ 0.000 0.463 331.1 0.055 0.016 0.000 0.463 i~ ~~• `' ~ ~ A ~~~ ~, u ~QQf ~gEPH D,~~~ OF WAS/. f~ r~~ (ter 4 q ~'/~ _ ~ r FCIS'1 E~,~O ,p 3~5-, !~' A Ex~~es: ~ (-n- 0,~~ 331.2 0.057 0.020 0.000 0.463 331.3 0.060 0.025 0.000 0.463 331.3 0.062 0.029 0.411 0.463 331.4 0.064 0.034 1.873 0.463 331.5 0.067 0.039 3.920 0.463 331.6 0.069 0.095 6.416 0.463 331.7 0.071 0.050 9.292 0.963 331.7 0.074 0.056 12.50 0.463 331.8 0.076 0.061 16.01 0.463 331.9 0.078 0.067 19.81 0.463 332.0 0.081 0.074 23.86 0.463 332.0 0.083 0.080 28.15 0.463 332.1 0.086 0.087 32.67 0.463 332.2 0.088 0.093 37.42 0.963 332.3 0.090 0.100 42.37 0.463 332.4 0.093 0.107 47.53 0.463 332.9 0.095 0.115 52.88 0.463 332.5 0.098 0.122 58.41 0.963 332.6 0.100 0.130 64.13 0.463 332.7 0.103 0.138 70.02 0.463 332.7 0.105 0.146 76.08 0.463 332.8 0.108 0.154 82.31 0.963 332.9 0.110 0.163 88.70 0.463 333.0 0.113 0.171 95.24 0.463 333.1 0.115 0.180 101.9 0.463 333.1 0.118 0.189 108.8 0.463 333.2 0.120 0.199 115.8 0.463 333.3 0.123 0.208 122.9 0.463 333.4 0.126 0.218 130.2 0.463 333.4 0.128 0.228 137.6 0.463 333.5 0.131 0.238 145.2 0.463 333.6 0.133 0.248 152.9 0.463 333.7 0.136 0.258 160.7 0.463 333.8 0.139 0.269 168.6 0.463 333.8 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.564016 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.564016 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.094867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated ea r Y Predeveloped Developed _ _ 1956 0.301 0.000 1957 0.499 0.000 1958 0.287 0.000 1959 0.336 0.000 1960 0.370 0.000 1961 0.243 0.000 1962 0.266 0.000 1963 0.51"7 0.000 1964 0.387 0.000 1965 0.359 0.000 ]966 0.256 0.000 1967 0.303 0.000 1968 0.244 0.000 1969 0.242 0.000 1970 0.242 0.000 1971 0.300 0.000 1972 0.338 0.000 1973 0.285 0.000 1974 0.331 0.000 1975 0.287 0.000 1976 0.329 0.000 1977 0.418 0.000 1978 0.355 0.000 1979 0.423 0.000 1980 0.317 0.000 1981 0.361 0.000 1982 0.919 0.000 1983 0.449 0.000 1984 0.273 0.000 1985 0.317 0.000 1986 0.348 0.000 1987 0.362 0.000 1988 0.210 0.000 1989 0.251 0.000 1990 0.492 0.000 1991 0.471 0.000 1992 0.309 0.000 1993 0.226 0.000 1994 0.251 0.000 1995 0.364 0.000 1996 0.369 0.000 1997 0.298 0.000 1998 0.417 0.000 1999 0.358 0.000 Ranked Yearly Peaks for Predeveloped and Developed-M~.tigated Rank Predeveloped Developed 1 0.4992 0.0000 2 0.4918 0.0000 3 0.9707 0.0000 4 0.4490 0.0000 5 0.4230 0.0000 6 0.4194 0.0000 7 0.4182 0.0000 g 0.4168 0.0000 9 0.3873 0.0000 10 0.3703 0.0000 11 0.3693 0.0000 12 0.3639 0.0000 13 0.3619 0.0000 14 0.3610 0.0000 15 0.3587 0.0000 16 0.3581 0.0000 17 0.3559 0.0000 18 0.3484 0.0000 19 0.3376 0.0000 20 0.3364 0.0000 21 0.3313 0.0000 22 0.3286 0.0000 23 0.3173 0.0000 24 0.3169 0.0000 25 0.3086 0.0000 26 0.3032 0.0000 27 0.3009 0.0000 28 0.2997 0.0000 29 0.2976 0.0000 30 0.2870 0.0000 31 0.2867 0.0000 32 0.2846 0.0000 33 0.2728 0.0000 34 0.2658 0.0000 35 0.2559 0.0000 36 0.2513 0.0000 37 0.2513 0.0000 38 0.2443 0.0000 39 0.2426 0.0000 40 0.2423 0.0000 41 0.2420 0.0000 42 0.2261 0.0000 43 0.2100 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1632 1058 0 .0 Pass 0.1668 1012 0 .0 Pass 0.1705 935 0 .0 Pass 0.1742 858 0 .0 Pass 0.1779 815 0 .0 Pass 0.1816 740 0 .0 Pass 0.1853 679 0 .0 Pass 0.1889 694 0 .0 Pass 0.1926 600 0 .0 Pass 0.1963 551 0 .0 Pass 0.2000 521 0 .0 Pass 0.2037 479 0 .0 Pass 0.2074 446 0 .0 Pass 0.2.110 412 0 .0 Pass 0.2147 381 0 .0 Pass 0.2184 347 0 .0 Pass 0.2221 319 0 .0 Pass 0.2258 307 0 .0 Pass 0.2295 290 0 .0 Pass 0.2331 266 0 .0 Pass 0.2368 246 0 .0 Pass 0.2405 229 0 .0 Pass 0.2442 211 0 .0 Pass 0.2479 198 0 .0 Pass 0.2516 188 0 .0 Pass 0.2552 172 0 .0 Pass 0.2589 167 0 .0 Pass 0.2626 160 0 .0 Pass 0.2663 151 0 .0 Pass 0.2700 144 0 .0 Pass 0.2737 141 0 .0 Pass 0.2774 136 0 .0 Pass 0.2810 130 0 .0 Pass 0.2897 119 0 .0 Pass 0.2884 112 0 .0 Pass 0.2921 107 0 .0 Pass 0.2958 101 0 .0 Pass 0.2995 92 0 .0 Pass 0.3031 86 0 .0 Pass 0.3068 81 0 .0 Pass 0.3105 76 0 .0 Pass 0.3142 70 0 .0 Pass 0.3179 67 0 .0 Pass 0.3216 65 0 .0 Pass 0.3252 60 0 .0 Pass 0.3289 56 0 .0 Pass 0.3326 52 0 .0 Pass 0.3363 50 0 .0 Pass 0.3400 45 0 .0 Pass 0.3437 43 0 .0 Pass 0.3973 90 0 .0 Pass 0.3510 36 0 .0 Pass 0.3547 36 0 .0 Pass 0.3584 33 0 .0 Pass 0.3621 27 0 .0 Pass 0.3658 24 0 .0 Pass 0.3694 24 0 .0 Pass 0.3731 21 0 .0 Pass 0.3768 21 0 .0 Pass 0.3805 19 0 .0 Pass 0.3842 17 0 .0 Pass 0.3879 17 0 .0 Pass 0.3915 16 0 .0 Pass 0.3952 16 0 .0 Pass 0.3989 15 0 .0 Pass 0.9026 15 0 .0 Pass 0.4063 13 0 .0 Pass 0.4100 12 0 .0 Pass 0.4136 12 0 .0 Pass 0.4173 11 0 .0 Pass 0.4210 9 0 .0 Pass 0.4247 7 0 .0 Pass 0.4284 7 0 .0 Pass 0.4321 7 0 .0 Pass 0.4358 7 0 .0 Pass 0.4394 6 0 .0 Pass 0.4431 6 0 .0 Pass 0.4468 6 0 .0 Pass 0.4505 5 0 .0 Pass 0.4542 5 0 .0 Pass 0.4579 5 0 .0 Pass 0.4615 5 0 .0 Pass 0.9652 5 0 .0 Pass 0.4689 5 0 .0 Pass 0.4726 9 0 .0 Pass 0.4763 4 0 .0 Pass 0.4800 4 0 .0 Pass 0.4836 4 0 .0 Pass 0.4873 4 0 .0 Pass 0.4910 4 0 .0 Pass 0.4947 3 0 .0 Pass 0.4984 2 0 .0 Pass 0.5021 1 0 .0 Pass 0.5057 1 0 .0 Pass 0.5099 1 0 .0 Pass 0.5131 1 0 .0 Pass 0.5168 1 0 .0 Pass 0.5205 0 0 .0 Pass 0.5242 0 0 .0 Pass 0.5278 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.171 acre-feet On-line Facility target flow: 0.18 cfs. Adjusted for 15 IIl].n: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min• 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington Stat Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. in no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damage for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEAR .fIOW{tfs) 1Q0 xxxyxxxxxnrxroacwr.oc~oc~xx~xxxx~Kxxx 10L1 ` -~~ ~ _ ~" ~ ~ ~ t , , 50 .5278 ~ ' } 25 `4907 1.0 10 "4389 ,,,, ~ a°oo°aao°a 5 3958 ~ aq°O°°° o Predeveloped ~° 10E-1 x Developed Mitigated 2 3263 -~ ~_ d _ 10E-2 1 10 20 30 40 50 60 70 80 90 99 Cumulative Pt•obabili Yearly Peaks for Predeveloped Flow Frequency Chart TF<pR ~ FLOP! (cfsT _ _n Pre~ievelnpP~! 300 ~ 52 8 ' ` ~ , ~ 0 53 _ __ _ ~_~ _ ___ -_ x Developed witl~ factlity ' `~ `~ 044 ... .. a . .~_... .. 25'.4907 ~ ~l, ~` ~ ~~ ~_ 0 35 10 4389 , 5 3959 ~~~' ,~ ~' 0 25 --___ . _ _ _ _ ~_ _ ~ _ ~_ 3 (_ ' 2 3263 ~ `~°'", _ ~ ,~ ~ ~- 016 ____. ___ _ _ _ __ ___ _ _ ___ _ `~~ (,, R{ ,~_ ~~? ~ F 10E•5 ~ 10E•4 10E•3 1UE~2 10E-1 1 10 < _ x t i Percent Exceedin Yearly Peaks for developed W10 Pond Duration Graph TEAR FLOW (~) 100 11 38 , ~ , , ~ i ~ ~ 3 i k ~ i~ ~ t t 50 " 7 701 ~--~-` ~ -'-~" 3 ; ; 1 ; ~ , „ ~ ~ ~ ~ 25 5.045 ' t 3 f ~i i]~ i + 1 ' ' 3 ' = I I;~ ~ 3j ":"" "~." " ? ` 10 , 2 681 -""°`° ~ ° ' _ " "r . S ) ~x 'i 3 { 1 r ~ 151a 'S rte .~ - ` ~ , a ' ,, ,,~ 5459 2 (early Peaks for Developed W/Pond CLEARHIS BSN 01 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN 01 0 10 7 83 BSN 01 0 17 7 83 BSN 01 0 28 7 83 BSN 01 0 33 7 83 BSN 01 035 783 BSN 01 0 38 7 83 yr Drainage Area: BSN 01 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur. 24.00 hrs Area CN Pervious 0.0690 ac 78.00 Impervious 0.3680 ac 98 00 Total 0 4370 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Pervious TC Data: Flow type Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Lme of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN 02 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN 02 0 21 8 00 BSN 02 0 36 8 00 BSN 02 0 55 8 00 BSN 02 0 65 8 00 BSN 02 0 70 8 00 BSN 02 0 75 8 00 yr Drainage Area: BSN 02 Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0 0627 ac 78.00 Impervious 0.7959 ac 98.00 Total 0.8586 ac Peak Vol Area Method Ramtype (ac-ft) ac /Loss 0 0335 0 44 SBUH/SCS TYPEIA 6 mo 0 0572 0 44 SBUH/SCS TYPE1A 2 yr 0 0914 0 44 SBUH/SCS TYPEIA 10 yr 0 1088 0 44 SBUH/SCS TYPEIA 25 yr 0 1176 0 44 SBUH/SCS TYPE1A 50 yr 0 1263 0 44 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs. 0 20 Intv: 10 00 min TC 0 03 hrs 0 06 hrs 0.0690 ac 0 2769 ac 0 0911 ac Length• Slope: 6 00 ft 2 00% Coeff: Travel Time 0.2400 1 90 min Length. Slope: 304 00 ft 1 27% 18 00 ft 2 00% 105.00 ft 0.50% 5.00 ft 2 00% Peak Vol Area Coeff Travel Time 27 0000 1 67 min 00110 039 min 21.0000 1 18 min 0 0110 0.14 min Method Raintype (ac-ft) ac /Loss 0 0713 0 86 SBUHlSCS TYPEIA 6 mo 0 1202 0 86 SBUH/SCS TYPEIA 2 yr 0 1895 0 86 SBUH/SCS TYPE1A 10 yr 0 2245 0 86 SBUH/SCS TYPEIA 25 yr 0 2420 0 86 SBUH/SCS TYPE1A 50 yr 0 2596 0 86 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs 0 20 Intv• 10 00 mm TC 0.03 hrs 0 09 hrs Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0627 ac Impervious CN Data: ROADWAY 98 00 0 7754 ac SIDWALK 98 00 0 0205 ac Pervious TC Data: Flow type Description Length: Slope: Coeff. Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type' Description. Length Slope• Coeff. Travel Time Shallow Along Flow Line of Gutter 360 00 ft 1.00% 27.0000 2.22 min Sheet Across Parking 24 00 ft 2.00% 0 0110 0.49 min Channel Through Strom Water Pipe 238.00 ft 0.50% 21 0000 2 67 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0 14 min ADDHYD [BSN 01] AS [6 mo] [BSN 02] AS [6 mo] TO [B SN 01 +BSN 02] Peak Flow• 0.3111 cfs Peak Time. 8 00 hrs Hyd Vol. 4564 69 cf - 0 1048 acft ADDHYD [BSN 01] AS [2 yr] [BSN 02] AS [2 yr] TO [BSN 01 +BSN 02] Peak Flow• 0 5212 cfs Peak Time 8 00 hrs Hyd Vol. 7727.89 cf - 0 1774 acft ADDHYD [BSN 01] AS [10 yr] [BSN 02] AS [10 yr] TO [BSN 01 +BSN 02] Peak Flow• 0 8176 cfs Peak Time: 7.83 hrs Hyd Vol• 12235.76 cf - 0 2809 acft ADDHYD (BSN 01] AS [25 yr] [BSN 02] AS [25 yr] TO [BSN 01 +BSN 02] Peak Flow 0 9685 cfs Peak Time 7 83 hrs Hyd Vol. 14517 66 cf - 0.3333 acft ADDHYD (BSN 01] AS [50 yr] [BSN 02] AS [50 yr] TO [BSN 01 +BSN 02] Peak Flow. 1.0441 cfs Peak Time 7.83 hrs Hyd Vol• 15662 58 cf - 0.3596 acft ADDHYD [BSN 01] AS [100 yr] [BSN 02] AS (100 yr] TO [BSN 01 +BSN OZ] Peak Flow: 1 1199 cfs Peak Time: 7 83 hrs Hyd Vol: 16810.00 cf - 0.3859 acft Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int 10.00 mm Base Flow• Peak Flow• 1.1199 cfs Peak Time. 7 83 hrs Hyd Vol• 0 3859 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0038 8.67 0 4640 16 50 0 1521 0 83 0 0148 8 83 0 3943 16 67 0 1521 1 00 0 0277 9 00 0 3976 16 83 0 1521 1 17 0 0423 9 17 0 3445 17 00 0 1522 1 33 0 0562 9 33 0 2968 17 17 0 1468 1 50 0 0655 9 50 0 2993 17 33 0 1419 1 67 0 0763 9 67 0 2828 17 50 0 1422 1 83 0 0860 9 83 0 2687 17 67 0 1421 2 00 0 0921 10 00 0 2696 17 83 0 1422 2 17 0 1008 10 17 0 2537 18 00 0 1422 2 33 0 1088 10 33 0 2394 18 17 0 1369 2 50 0 1129 10 50 0 2402 18 33 0 1319 2 g7 0 1166 10 67 0 2295 18 50 0 1322 2 g3 0 1197 10 83 0 2200 18 67 0 1321 3 00 0 1223 11 00 0 2205 18 83 0 1322 3 17 0 1247 11 17 0 2151 19 00 0.1322 3 33 0 1268 11 33 0 2104 19 17 0 1268 3 50 0 1286 11 50 0 2108 19 33 0 1219 3 67 0 1344 11 67 0 2055 19 50 0 1222 3 83 0 1400 11 83 0 2007 19 67 0 1221 4 00 0 1414 12 00 0 2011 19 83 0 1221 4 17 0 1514 12 17 0 1957 20 00 0 1221 4 33 0 1611 12 33 0 1909 20 17 0 1222 4 50 0 1621 12 50 0 1913 20 33 0 1222 4 67 0 1723 12 67 0 1859 20 50 0 1222 4 83 0 1820 12 83 0 1811 20 67 0 1222 5 00 0 1834 13 00 0 1814 20 83 0 1222 517 01941 1317 01814 2100 01223 5 33 0 2043 13 33 0 1815 21 17 0.1223 5 50 0 2055 13 50 0 1815 21 33 0.1223 5 67 0 2162 13 67 0 1763 21 50 0 1223 5 83 0 2265 13 83 0 1714 21 67 0 1223 6 00 0 2275 14 00 0 1717 21 83 0 1223 6 17 0 2479 14 17 0 1717 22 00 0 1224 6 33 0 2673 14 33 0 1717 22 17 0 1170 6 50 0 2682 14 50 0 1718 22 33 0 1120 6 67 0 2989 14 67 0 1665 22 50 0 1123 6 83 0 3278 14 83 0 1616 22 67 0 1122 7 00 0 3285 15 00 0 1619 22 83 0 1122 . 7 17 0.3650 15 17 0 1619 23 00 0 1122 7 33 0.3991 15 33 0 1619 23 17 0 1123 7 50 0 3997 15 50 0 1620 23 33 0 1123 7 67 0 7693 15 67 0 1566 23 50 0 1123 7 g3 1 1199 15 83 0.1518 23 67 0.1123 8 00 1.1156 16 00 0 1521 23 83 0 1123 8 17 0 8191 16 17 0 1520 24 00 0 1123 8 33 0 5327 16 33 0 1520 24 17 0 0527 8 50 0 5472 16 50 0 1521 24 33 0 0018 Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int 10.00 min Base Flow• Peak Flow: 1.1199 cfs Peak Time 7 83 hrs Hyd Vol. 0.3859 acft MOVEHYD (BASIN O] TO [BASIN O - 6 mo] AS [6 mo] Peak Flow: 0 3111 cfs Peak Time 8 00 hrs Hyd Vol 4564 69 cf - 0 1048 acft MOVEHYD [BASIN O] TO (BASIN O - 100 yr] AS [100 yr] Peak Flow. 1 1199 cfs Peak Time 7.83 hrs Hyd Vol. 16810 00 cf - 0 3859 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 325.0000 ft 331 3000 ft 0.10 Infd• 10.00 in/hr Multiplier 1 00 Reach ID: BIOSWALE O Section Properties: Shape Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh:1v Up Node Dn Node Up Invert DUMMY O 0 0000 ft Conduit Con straints: Mm Vel Max Vel Min Cov 0 5000 ft 1 0000 ft 3 0000 ft Routing Method: Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3.OOh • 1 v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0.5000 ft 2 0000 ft 0.0000 ft In/Exfil Hold Up Hold Drt Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Tnb Area Flow Capacity Velocity Normal Depth 1.2956 ac 1 1199 cf 1 1199 cf 1.0000 ft/s 0 1845 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0 000000 ft 0 000000 ft 0 0000 ft ROUTEHYD (BASIN O - 6 mo] THRU [BIOSWALE O] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin 1 Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE O 1 2956 0 3111 ---- 1 00 0 0992 Ditch 0 6680 ----- BASIN O ROUTEHYD [BASIN O - 100 yr] THRU [BIOSWALE O] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ftls ftls ---------- BIOSWALE O 1 2956 1 1199 ---- 1 00 0 1845 Ditch 0 9793 ----- BASIN O Node ID: INFILTRATION O Desc: Manhole structure Start EI: 331.3000 ft Max EI: 332.5000 ft Contrib Basin Contrib Hyd Length W Idth Void Ratio 200.0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN O RLP Desc Manhole structure Start EI. 331 3000 ft Max EI: 332.50000 ft Contrib Basin Contrib Hyd: Storage Id' INFILTRATION O Discharge Id: INFILTRATION RLPCOMPUTE (BASIN O RLP] SUMMARY 100 yr MatchO=PeakO= 1.1199 cfs Peak Out O. 0.7391 cfs -Peak Stg. 332.43 ft -Active Vol. 1880 85 WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -0 Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precap Scale: 0.80 PREDEVELOPED LAND USE Basin Basin O Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS : 1 . 31 f~'~p ~ , ~'~~~~ DEVELOPED LAND USE Basin Basin O Flows To Bio-Infiltration Swale 0 Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale O Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raan / Evap as not activated. Dimensions Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 330.8 0.046 0.000 0.000 0.000 330.9 0.098 0.004 0.000 0.963 331.0 0.050 0.007 0.000 0.463 331.0 0.053 0.012 0.000 0.463 331.1 0.055 0.016 0.000 0.463 ,~gEPH Dq~~ ~~F WASK~t f~ ~~ co S M _ . ->_ i ~C~S~ EKE AA ~~~~~ O~~G~~I GXPiltES: ! 221-- -O~ p rrrns®r a®ey 331.2 0.057 0.020 0.000 0.463 331.3 0.060 0.025 0.000 ~ 0.463 331.3 0.062 0.029 0.411 0.463 331.4 0.064 0.034 1.873 0.463 331.5 0.067 0.039 3.920 0.463 331.6 0.069 0.095 6.916 0.463 331.7 0.071 0.050 9.292 0.963 331.7 0.079 0.056 12.50 0.463 331.8 0.076 0.061 16.01 0.463 331.9 0.078 0.067 19.81 0.963 332.0 0.081 0.079 23.86 0.463 332.0 0.083 0.080 28.15 0.963 332.1 0.086 0.087 32.67 0.463 332.2 0.088 0.093 3"1.92 0.463 332.3 0.090 0.100 42.3"1 0.963 332.4 0.093 0.107 47.53 0.463 332.9 0.095 0.115 52.88 0.463 332.5 0.098 0.122 58.91 0.463 332.6 0.100 0.130 64.13 0.463 332.7 0.103 0.138 70.02 0.463 332.7 0.105 0.146 76.08 0.463 332.8 0.108 0.154 82.31 0.963 332.9 0.110 0.163 88.70 0.463 333.0 0.113 0.171 95.24 0.463 333.1 0.115 0.180 101.9 0.463 333.1 0.118 0.189 108.8 0.463 333.2 0.120 0.199 115.8 0.463 333.3 0.123 0.208 122.9 0.963 333.4 0.126 0.218 130.2 0.463 333.4 0.128 0.228 137.6 0.463 333.5 0.131 0.238 145.2 0.963 333.6 0.133 0.248 152.9 0.463 333.7 0.136 0.258 160.7 0.463 333.8 0.139 0.269 168.6 0.463 333.8 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Pera.od Flow (cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.569016 Flow Frequency Return Periods for Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527896 100 year 0.564016 Developed Unma.tigated Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.301 0.000 1957 0.499 0.000 1958 0.287 0.000 1959 0.336 0.000 1960 0.370 0.000 1961 0.243 0.000 1962 0.266 0.000 1963 0.517 0.000 1964 0.387 0.000 1965 0.359 0.000 1966 0.256 0.000 1967 0.303 0.000 1968 0.244 0.000 1969 0.242 0.000 1970 0.242 0.000 1971 0.300 0.000 1972 0.338 0.000 1973 0.285 0.000 1974 0.331 0.000 1975 0.287 0.000 1976 0.329 0.000 1977 0.418 0.000 1978 0.355 0.000 1979 0.423 0.000 1980 0.317 0.000 1981 0.361 0.000 1982 0.919 0.000 1983 0.449 0.000 1984 0.273 0.000 1985 0.317 0.000 1986 0.348 0.000 1987 0.362 0.000 1988 0.210 0.000 1989 0.251 0.000 1990 0.492 0.000 1991 0.471 0.000 1992 0.309 0.000 1993 0.226 0.000 1994 0.251 0.000 1995 0.364 0.000 1996 0.369 0.000 1997 0.298 0.000 1998 0.417 0.000 1999 0.358 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4992 0.0000 2 0.4918 0.0000 3 0.4707 0.0000 4 0.4490 0.0000 5 0.4230 0.0000 h 0.4194 0.0000 7 0.9182 0.0000 8 0.4168 0.0000 9 0.3873 0.0000 10 0.3703 0.0000 11 0.3693 0.0000 12 0.3639 0.0000 13 0.3619 0.0000 14 0.3610 0.0000 15 0.3587 0.0000 16 0.3581 0.0000 17 0.3554 0.0000 18 0.3484 0.0000 19 0.3376 0.0000 20 0.3364 0.0000 21 0.3313 0.0000 22 0.3286 0.0000 23 0.3173 0.0000 24 0.3169 0.0000 25 0.3086 0.0000 26 0.3032 0.0000 27 0.3009 0.0000 28 0.2997 0.0000 29 0.2976 0.0000 30 0.2870 0.0000 31 0.2867 0.0000 32 0.2846 0.0000 33 0.2728 0.0000 39 0.2658 0.0000 35 0.2559 0.0000 36 0.2513 0.0000 37 0.2513 0.0000 38 0.2443 0.0000 39 0.2926 0.0000 40 0.2423 0.0000 41 0.2420 0.0000 42 0.2261 0.0000 93 0.2100 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1632 1058 0 .0 Pass 0.1668 1012 0 .0 Pass 0.1705 935 0 .0 Pass 0.1742 858 0 .0 Pass 0.1779 815 0 .0 Pass 0.1816 740 0 .0 Pass 0.1853 679 0 .0 Pass 0.1889 644 0 .0 Pass 0.1926 600 0 .0 Pass 0.1963 551 0 .0 Pass 0.2000 521 0 .0 Pass 0.?_037 479 0 .0 Pass 0.2074 446 0 .0 Pass 0.2110 412 0 .0 Pass 0.2147 381 0 .0 Pass 0.2184 347 0 .0 Pass 0.2221 319 0 .0 Pass 0.2258 307 0 .0 Pass 0.2295 290 0 .0 Pass 0.2331 266 0 .0 Pass 0.2368 246 0 .0 Pass 0.2405 229 0 .0 Pass 0.2442 211 0 .0 Pass 0.2479 198 0 .0 Pass 0.2516 188 0 .0 Pass 0.2552 172 0 .0 Pass 0.2589 167 0 .0 Pass 0.2626 160 0 .0 Pass 0.2663 151 0 .0 Pass 0.2700 199 0 .0 Pass 0.2737 141 0 .0 Pass 0.2774 136 0 .0 Pass 0.2810 130 0 .0 Pass 0.2847 119 0 .0 Pass 0.2884 112 0 .0 Pass 0.2921 107 0 .0 Pass 0.2958 101 0 .0 Pass 0.2995 92 0 .0 Pass 0.3031 86 0 .0 Pass 0.3068 81 0 .0 Pass 0.3105 76 0 .0 Pass 0.3142 70 0 .0 Pass 0.3179 67 0 .0 Pass 0.3216 65 0 .0 Pass 0.3252 60 0 .0 Pass 0.3289 56 0 .0 Pass 0.3326 52 0 .0 Pass 0.3363 50 0 .0 Pass 0.3400 45 0 .0 Pass 0.3437 43 0 .0 Pass 0.3473 40 0 .0 Pass 0.3510 36 0 .0 Pass 0.3547 36 0 .0 Pass 0.3584 33 0 .0 Pass 0.3621 27 0 .0 Pass 0.3658 29 0 .0 Pass 0.3699 24 0 .0 Pass 0.3731 21 0 .0 Pass 0.3768 21 0 .0 Pass 0.3805 19 0 .0 Pass 0.3892 17 0 .0 Pass 0.3879 17 0 .0 Pass 0.3915 16 0 .0 Pass 0.3952 16 0 .0 Pass 0.3989 15 0 .0 Pass 0.4026 15 0 .0 Pass 0.4063 13 0 .0 Pass 0.4100 12 0 .0 Pass 0.4136 12 0 .0 Pass 0.4173 11 0 .0 Pass 0.4210 9 0 .0 Pass 0.4297 7 0 .0 Pass 0.4284 7 0 .0 Pass 0.4321 7 0 .0 Pass 0.9358 7 0 .0 Pass 0.4394 6 0 .0 Pass 0.4431 6 0 .0 Pass 0.4468 6 0 .0 Pass 0.9505 5 0 .0 Pass 0.4542 5 0 .0 Pass 0.4579 5 0 .0 Pass 0.4615 5 0 .0 Pass 0.4652 5 0 .0 Pass 0.4689 5 0 .0 Pass 0.4726 9 0 .0 Pass 0.4763 4 0 .0 Pass 0.4800 4 0 .0 Pass 0.4836 4 0 .0 Pass 0.4873 4 0 .0 Pass 0.4910 4 0 .0 Pass 0.4997 3 0 .0 Pass 0.4984 2 0 .0 Pass 0.5021 1 0 .0 Pass 0.5057 1 0 .0 Pass 0.5094 1 0 .0 Pass 0.5131 1 0 .0 Pass 0.5168 1 0 .0 Pass 0.5205 0 0 .0 Pass 0.5242 0 0 .0 Pass 0.5278 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.171 acre-feet On-line facility target flow: 0.18 cfs. Adjusted for 15 min: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or emptied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEAR FLOW (cts) ~~ 164 __ ____ <~ ; 1Q0 X?~%kkh?rkkkY~}67:~Mi!3+.A~AU^~bPC'OOskYM;ckk3~?+k?tk?+ $~ .1279 21 ~ ~q07 '~ 1.0 10 4388 S 3959 C1 ~ooaoa°4 d"°°"°° o Redeveloped 2 .3263 ,~ 10E-1 x Developed Mitigated V uy L7 10E 2 - ~, 1 10 20 30 d0 30 60 70 SD 90 99 Cumulative Prababili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR FLOW (tfs) -- - 100 ..1640 --'° ~ ~ 0 53 - _ _ _ - ~ ~a.Ftede~el~pP4t _ _ _ ile l d dh F 6 ~ ° ~ 10 E 1278 / eve ope w ac x r = 044 e a ..... ~, ~ 21 .4907 10 `4369 ~ ~ ~ 1 ° 3559 ~ ~ ~ ~ ~ ; ~ ~ 0 31 - _ _ _ •~ 0 25 - _ _ _ _ _ _ _ _ _ ..- ~ , 3 1 2 3263 '~`~"~ J ~ ~~ ~ 016 ---- _ _ __ ____ _ _ _ _ _... _ _~ _ __ __. _ --_ !°~,' ~ ~ ~~ N i ~ , , ~ tD 10E•1 ~ 10E•4 10E•3 10E-2 10E•1 1 10 Percent ~xceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR FLOW tom) -_ 100 1136 , , 'i } ~' ,~ ' 3 ~ • ~~i ~~~ :' 3~ 10 7701 ~ ~ ~ j~~ ~3 ;~ i a :. 2S 1.041. .- -~~' ~ ' r ~~ , ;~ 10 ~ 2 681 ~ ;-.,.~-~~:.- = f ; 3 5 1.518 ~~' ~~ ~ ;;` L- arly Peaks for Developed WlPond CLEARHIS BSN 01 Event Summary: BasmlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN 01 0 10 7 83 0 0335 0 44 SBUH/SCS TYPEIA 6 mo BSN 01 0 17 7 83 0 0572 0 44 SBUH/SCS ~ TYPE1A 2 yr BSN 01 0 28 7 83 0 0914 0 44 SBUH/SCS TYPEIA 10 yr BSN 01 0 33 7 83 0 1088 0 44 SBUH/SCS TYPE1A 25 yr BSN 01 0 35 7 83 0 1176 0 44 SBUH/SCS TYPEIA 50 yr BSN 01 0 38 7 83 0 1263 0 44 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN 01 Hyd Method' SBUH Hyd Loss Method SCS CN Number Peak Factor. 484.00 SCS Abs• 0 20 Storm Dur• 24 00 hrs Intv• 10 00 min Area CN TC Pervious 0.0690 ac 78.00 0 03 hrs Impervious 0.3680 ac 98 00 0 06 hrs Total 0.4370 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0690 ac Impervious CN Data: ROADWAY 98 00 0.2769 ac SIDWALK 98.00 0 0911 ac Pervious TC Data: Flow type' Description• Length: Slope Coeff. Travel Time Sheet Across Planter Stnp 6 00 ft 2.00% 0 2400 1 90 min Impervious TC Data: Flow type. Description• Length Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 304.00 ft 1 27% 27.0000 1.67 min Sheet Across Roadway 18 00 ft 2 00% 0 0110 0.39 min Channel Through Strom Water Pipe 105 00 ft 0 50% 21 0000 1 18 min Sheet Across Sidewalks 5.00 ft 2 00% 0.0110 0.14 min BSN 02 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN 02 0 21 8 00 0 0713 0 86 SBUH/SCS TYPEIA 6 mo BSN 02 0 36 8 00 0 1202 0 86 SBUH/SCS TYPEIA 2 yr BSN 02 0 55 8 00 0 1895 0 86 SBUH/SCS TYPE1A 10 yr BSN 02 0 65 8 00 0 2245 0 86 SBUH/SCS TYPEIA 25 yr BSN 02 0 70 8 00 0 2420 0 86 SBUHISCS TYPEIA 50 yr BSN 02 0 75 8 00 0 2596 0 86 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN 02 Hyd Method: SBUH Hyd Loss Method SCS CN Number Peak Factor. 484 00 SCS Abs 0 20 Storm Dur: 24.00 hrs Intv 10 00 min Area CN TC Pervious 0.0627 ac 78 00 0 03 hrs Impervious 0.7959 ac 98 00 0 09 hrs Total 0 8586 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0.0627 ac Impervious CN Data: ROADWAY 98 00 0 7754 ac SIDWALK 98.00 0.0205 ac Pervious TC Data: Flow type: Description: Length Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0 2400 1 90 min Impervious TC Data: Flow type: Description: Length Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 360 00 ft 1 00% 27 0000 2 22 mm Sheet Across Parking 24.00 ft 2.00% 0 0110 0.49 mm Channel Through Strom Water Pipe 238.00 ft 0 50% 21.0000 2.67 min Sheet Across Sidewalks 5.00 ft 2 00% 0 0110 0 14 min ADDHYD [BSN 01] AS [6 mo] [BSN 02] AS [6 mo] TO [BSN 01 +BSN 02] Peak Flow 0.3111 cfs Peak Time. 8 00 hrs Hyd Vol 4564 69 cf - 0 1048 acft ADDHYD [BSN 01] AS [2 yr] [BSN 02] AS [2 yr] TO [BSN 01 +BSN 02] Peak Flow 0.5212 cfs Peak Time 8 00 hrs Hyd Vol: 7727.89 cf - 0.1774 acft ADDHYD [BSN 01] AS [10 yr] [BSN 02] AS [10 yr] TO [BSN 01 +BSN 02] Peak Flow. 0.8176 cfs Peak Time 7 83 hrs Hyd Vol. 12235.76 cf - 0 2809 acft ADDHYD [BSN 01] AS [25 yr] [BSN 02] AS [25 yr] TO [BSN 01 +BSN 02] Peak Flow. 0.9685 cfs Peak Time 7.83 hrs Hyd Vol 14517 66 cf - 0 3333 acft ADDHYD [BSN 01] AS [50 yr] [BSN 02] AS [50 yr] TO [BSN 01 +BSN 02] Peak Flow 1 0441 cfs Peak Time: 7 83 hrs Hyd Vol. 15662 58 cf - 0.3596 acft ADDHYD [BSN 01] AS [100 yr] [BSN 02] AS [100 yr] TO [BSN 01 +BSN 02] Peak Flow 1.1199 cfs Peak Time 7.83 hrs Hyd Vol: 16810 00 cf - 0 3859 acft Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 1.1199 cfs Peak Time: 7 83 hrs Hyd Vol. 0 3859 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0038 8 67 0 4640 16 50 0 1521 0.83 0 0148 8 83 0 3943 16 67 0 1521 1 00 0 0277 9 00 0 3976 16 83 0 1521 1 17 0 0423 9 17 0 3445 17 00 0 1522 1 33 0 0562 9 33 0 2968 17 17 0 1468 1 50 0 0655 9 50 0 2993 17 33 0 1419 1 67 0 0763 9 67 0 2828 17 50 0 1422 1 83 0 0860 9 83 0 2687 17 67 0 1421 2 00 0 0921 10 00 0 2696 17 83 0 1422 2 17 0 1008 10 17 0 2537 18 00 0 1422 2 33 0 1088 10 33 0 2394 18 17 0 1369 2 50 0 1129 10 50 0 2402 18 33 0 1319 2 67 0 1166 10 67 0 2295 18 50 0 1322 2 g3 0 1197 10 83 0 2200 18 67 0 1321 3 00 0 1223 11 00 0 2205 18 83 0 1322 3 17 0 1247 11 17 0 2151 19 00 0 1322 3 33 0 1268 11 33 0 2104 19 17 0 1268 3 50 0 1286 11 50 0 2108 19 33 0 1219 3 67 0 1344 11 67 0 2055 19 50 0 1222 3 83 0 1400 11 83 0 2007 19 67 0 1221 4 00 0 1414 12 00 0 2011 19 83 0 1221 4 17 0 1514 12 17 0.1957 20 00 0 1221 4 33 0 1611 12 33 0 1909 20 17 0 1222 4 50 0 1621 12 50 0 1913 20 33 0 1222 4 67 0 1723 12 67 0 1859 20 50 0 1222 4 83 0.1820 12 83 0 1811 20 67 0 1222 5 00 0 1834 13 00 0 1814 20 83 0.1222 517 0.1941 1317 01814 2100 01223 5 33 0 2043 13 33 0 1815 21 17 0 1223 5 50 0 2055 13 50 0 1815 21 33 , 0 1223 5 67 0 2162 13 67 0 1763 21 50 0.1223 5 83 0 2265 13 83 0 1714 21 67 0 1223 6 00 0 2275 14 00 0 1717 21 83 0 1223 6 17 0 2479 14 17 0 1717 22 00 0 1224 6 33 0 2673 14 33 0 1717 22 17 0 1170 6 50 0 2682 14 50 0 1718 22 33 0 1120 6 67 0 2989 14 67 0 1665 22 50 0 1123 6 83 0 3278 14 83 0 1616 22 67 0 1122 7 00 0 3285 15 00 0 1619 22 83 0 1122 7.17 0.3650 15 17 0 1619 23 00 0 1122 7 33 0 3991 15 33 0 1619 23 17 0 1123 7 50 0 3997 15 50 0 1620 23 33 0 1123 7 67 0 7693 15 67 0 1566 23 50 0 1123 7.83 1 1199 15 83 0 1518 23 67 0 1123 8 00 1 1156 16 00 0 1521 23 83 0 1123 8 17 0 8191 16 17 0 1520 24 00 0 1123 8 33 0 5327 16 33 0 1520 24 17 0 0527 8 50 0 5472 16 50 0 1521 24 33 0 0018 Hydrograph ID: BASIN O Area. 1.2956 ac Hyd Int• 10.00 min Base Flow• Peak Flow. 1.1199 cfs Peak Time 7.83 hrs Hyd Vol 0.3859 acft MOVEHYD [BASIN O] TO [BASIN O - 6 mo] AS [6 mo] Peak Flow 0 3111 cfs Peak Time: 8 00 hrs Hyd Vol. 4564 69 cf - 0 1048 acft MOVEHYD [BASIN O] TO [BASIN O - 100 yr] AS [100 yr] Peak Flow: 1.1199 cfs Peak Time 7.83 hrs Hyd Vol. 16810.00 cf - 0.3859 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 325.0000 ft 331.3000 ft 0 10 Infd• 10.00 in/hr Multiplier 1 00 Reach ID: BIOSWALE O Section Properties: Shape• Ditch Size Material Manrnngs n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3.OOh.1v Up Node Dn Node Up Invert DUMMY O 0 0000 ft Conduit Con straints: Min Vel Max Vel Min Cov 0.5000 ft 1.0000 ft 3 0000 ft Routing Method• Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh 1 v Dn Invert 0 0000 ft Mm Slope Max Slope Min drop 0 5000 ft 2 0000 ft 0 0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 1 2956 ac 1.1199 cf 1.1199 cf 1.0000 ft/s 0.1845 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN O - 6 mo] THRU [BIOSWALE O] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin 1 Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE O 1 2956 0 3111 ---- 1 00 0 0992 Ditch 0 6680 ----- BASIN O ROUTEHYD [BASIN O - 100 yr] THRU [BIOSWALE O] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE O 1 2956 1.1199 ---- 1 00 0 1845 Ditch 0 9793 ----- BASIN O Node ID: INFILTRATION O Desc• Manhole structure Start EI: 331 3000 ft Max EI: 332.5000 ft Contrib Basin. Contrib Hyd Length Width Void Ratio 200 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN O RLP Desc• Manhole structure Start EI• 331 3000 ft Max EI: 332 50000 ft Contrib Basin Contrib Hyd: Storage Id INFILTRATION O Discharge Id: INFILTRATION RLPCOMPUTE [BASIN O RLP] SUMMARY 100 yr MatchQ=PeakQ= 1 1199 cfs Peak Out Q: 0 7391 cfs -Peak Stg: 332.43 ft -Active Vol• 1880 85 WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -O Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin 0 Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 DEVELOPED LAND USE Basin Basin O Flows To Bio-Infiltration Swale O Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale 0 Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n ; .., e., ~ , ,,,, Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraula.c Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) _ 330.8 0.046 0.000 0.000 0.000 330.9 0.098 0.009 0.000 0.463 331.0 0.050 0.007 0.000 0.463 331.0 0.053 0.012 0.000 0.463 331.1 0.055 0.016 0.000 0.463 ,\ S~'~~~~. ~~j~, ~c~R~s: ~)-n- p X331.2 0.057 0.020 0.000 0.463 331.3 0.060 0.025 0.000 0.463 331.3 0.062 0.029 0.411 0.463 331.9 0.064 0.034 1.873 0.463 331.5 0.067 0.039 3.920 0.463 331.6 0.069 0.045 6.416 0.963 331.7 0.071 0.050 9.292 0.463 331.7 0.074 0.056 12.50 0.463 331.8 0.076 0.061 16.01 0.463 331.9 0.078 0.067 19.81 0.463 332.0 0.081 0.074 23.86 0.963 332.0 0.083 0.080 28.15 0.463 332.1 0.086 0.087 32.67 0.963 332.2 0.088 0.093 37.92 0.463 332.3 0.090 0.100 42.37 0.463 332.4 0.093 0.107 47.53 0.963 332.9 0.095 0.115 52.88 0.963 332.5 0.098 0.122 58.41 0.463 332.6 0.100 0.130 64.13 0.463 332.7 0.103 0.138 70.02 0.463 332.7 0.105 0.146 76.08 0.463 332.8 0.108 0.159 82.31 0.463 332.9 0.110 0.163 88.70 0.463 333.0 0.113 0.171 95.24 0.463 333.1 0.115 0.180 101.9 0.963 333.1 0.118 0.189 108.8 0.963 333.2 0.120 0.199 115.8 0.463 333.3 0.123 0.208 122.9 0.963 333.4 0.126 0.218 130.2 0.463 333.4 0.128 0.228 137.6 0.463 333.5 0.131 0.238 145.2 0.463 333.6 0.133 0.248 152.9 0.463 333.7 0.136 0.258 160.7 0.463 333.8 0.139 0.269 168.6 0.963 333.8 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.938859 25 year 0.490683 50 year 0.527896 100 year 0.564016 Flow Frequency Return Periods for Return Pera.od Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.564016 Developed Unmita.gated Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 tearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.301 0.000 1957 0.499 0.000 1958 0.287 0.000 1959 0.336 0.000 1960 0.370 0.000 1961 0.243 0.000 1962 0.266 0.000 1963 0.517 0.000 1969 0.387 0.000 1965 0.359 0.000 1966 0.256 0.000 1967 0.303 0.000 1968 0.249 0.000 1969 0.242 0.000 1970 0.242 0.000 1971 0.300 0.000 1972 0.338 0.000 1973 0.285 0.000 1974 0.331 0.000 1975 0.287 0.000 1976 0.329 0.000 1977 0.418 0.000 1978 0.355 0.000 1979 0.423 0.000 1980 0.317 0.000 1981 0.361 0.000 1982 0.419 0.000 1983 0.449 0.000 1984 0.273 0.000 1985 0.317 0.000 1986 0.348 0.000 1987 0.362 0.000 1988 0.210 0.000 1989 0.251 0.000 1990 0.492 0.000 1991 0.971 0.000 1992 0.309 0.000 1993 0.226 0.000 1994 0.251 0.000 1995 0.364 0.000 1996 0.369 0.000 1997 0.298 0.000 1998 0.417 0.000 1999 0.358 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4992 0.0000 2 0.4918 0.0000 3 0.4707 0.0000 9 0.4490 0.0000 5 0.4230 0.0000 6 0.4194 0.0000 7 0.4182 0.0000 8 0.4168 0.0000 9 0.3873 0.0000 10 0.3703 0.0000 11 0.3693 0.0000 12 0.3639 0.0000 13 0.3619 0.0000 14 0.3610 0.0000 15 0.3587 0.0000 16 0.3581 0.0000 17 0.3554 0.0000 18 0.3484 0.0000 19 0.3376 0.0000 20 0.3364 0.0000 ~1 0.3313 0.0000 22 0.3286 0.0000 23 0.3173 0.0000 24 0.3169 0.0000 25 0.3086 0.0000 26 0.3032 0.0000 27 0.3009 0.0000 28 0.2997 0.0000 29 0.2976 0.0000 30 0.2870 0.0000 31 0.2867 0.0000 32 0.2846 0.0000 33 0.2728 0.0000 34 0.2658 0.0000 35 0.2559 0.0000 36 0.2513 0.0000 37 0.2513 0.0000 38 0.2443 0.0000 39 0.2426 0.0000 40 0.2423 0.0000 91 0.2420 0.0000 92 0.2261 0.0000 43 0.2100 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1632 1058 0 .0 Pass 0.1668 1012 0 .0 Pass 0.1705 935 0 .0 Pass 0.1742 858 0 .0 Pass 0.1779 815 0 .0 Pass 0.1816 740 0 .0 Pass 0.1853 679 0 .0 Pass 0.1889 694 0 .0 Pass 0.1926 600 0 .0 Pass 0.1963 551 0 .0 Pass 0.2000 521 0 .0 Pass 0.2037 479 0 .0 Pass 0.2074 496 0 .0 Pass 0.2110 412 0 .0 Pass 0.2147 381 0 .0 Pass 0.2184 347 0 .0 Pass 0.2221 319 0 .0 Pass 0.2258 307 0 .0 Pass 0.2295 290 0 .0 Pass 0.2331 266 0 .0 Pass 0.2368 246 0 .0 Pass 0.2405 229 0 .0 Pass 0.2442 211 0 .0 Pass 0.2479 198 0 .0 Pass 0.2516 188 0 .0 Pass 0.2552 172 0 .0 Pass 0.2589 167 0 .0 Pass 0.2626 160 0 .0 Pass 0.2663 151 0 .0 Pass 0.2700 144 0 .0 Pass 0.2737 191 0 .0 Pass 0.2774 136 0 .0 Pass 0.2810 130 0 .0 Pass 0.2847 119 0 .0 Pass 0.2884 112 0 .0 Pass 0.2921 107 0 .0 Pass 0.2958 101 0 .0 Pass 0.2995 92 0 .0 Pass 0.3031 86 0 .0 Pass 0.3068 81 0 .0 Pass 0.3105 76 0 .0 Pass 0.3142 70 0 .0 Pass 0.3179 67 0 .0 Pass 6.3216 65 0 .0 Pass 0.3252 60 0 .0 Pass 0.3289 56 0 .0 Pass 0.3326 52 0 .0 Pass 0.3363 50 0 .0 Pass 0.3400 95 0 .0 Pass 0.3437 43 0 .0 Pass 0.3473 40 0 .0 Pass 0.3510 36 0 .0 Pass 0.3547 36 0 .0 Pass 0.3584 33 0 .0 Pass 0.3621 27 0 .0 Pass 0.3658 29 0 .0 Pass 0.3699 24 0 .0 Pass 0.3731 21 0 .0 Pass 0.3768 21 0 .0 Pass 0.3805 19 0 .0 Pass 0.3842 17 0 .0 Pass 0.3879 17 0 .0 Pass 0.3915 16 0 .0 Pass 0.3952 16 0 .0 Pass 0.3989 15 0 .0 Pass 0.4026 15 0 .0 Pass 0.4063 13 0 .0 Pass 0.4100 12 0 .0 Pass 0.4136 12 0 .0 Pass 0.4173 11 0 .0 Pass 0.4210 9 0 .0 Pass 0.4247 7 0 .0 Pass 0.4284 7 0 .0 Pass 0.4321 7 0 .0 Pass 0.4358 7 0 .0 Pass 0.9399 6 0 .0 Pass 0.4431 6 0 .0 Pass 0.4468 6 0 .0 Pass 0.4505 5 0 .0 Pass 0.9542 5 0 .0 Pass 0.4579 5 0 .0 Pass 0.4615 5 0 .0 Pass 0.4652 5 0 .0 Pass 0.4689 5 0 .0 Pass 0.4726 4 0 .0 Pass 0.4763 4 0 .0 Pass 0.4800 4 0 .0 Pass 0.4836 4 0 .0 Pass 0.4873 4 0 .0 Pass 0.4910 4 0 .0 Pass 0.4997 3 0 .0 Pass 0.4984 2 0 .0 Pass 0.5021 1 0 .0 Pass 0.5057 1 0 .0 Pass 0.5094 1 0 .0 Pass 0.5131 1 0 .0 Pass 0.5168 1 0 .0 Pass 0.5205 0 0 .0 Pass 0.5242 0 0 .0 Pass 0.5278 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.171 acre-feet On-line facility target flow: 0.18 cfs. Adjusted for 15 min: 0.2 c£s. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, ert:her expressed or implied, including but not limrted to impl~_ed warranties of program and accompanying documentation. in no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibtl~_ty of such damages 1,1~J~it FLOW(tis) 100 5640 --__ ____ f 1 ~ 1 ~` 1Q0 kkkkkkkkkkkkYtA~4'.t-0AM?~Lh4K~kkkkkkk7<kkkk ~ , 50 :.5278 4907 25 ~ 10 4389 ~ 10 5 3959 C1 ,o~oooaoooa ~ aooo©bvo~ o Predevetoped 2 X263 ,~ 10E-1 x Developed Mitigated U a N z O 10E-Z ~~ ~ 1 10 20 30 dO 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TfI1R FLOW {cis) 100 .5840. ,1 0 53 _ __ ~ o _ _ __ -_ __-_ - ~~red~vek~p~d _ _~ , , 50 ~ 5278 x Deucloped ~itlt facility 25 .4907 0 qq _ _ . 10 4389 ~ w 0 35 _ _ _ __ 5 ; 3959 ~ 0 25 __ __ _ _ . __ _ _ __ .~..._ _ e . tlt 2 3263 ~ 016 _ _ ___ __ __.__ __ _ _ _. _. _ _ _ ___ _ x U _N ,. ~ 10E~5 ~ 10E•d 10E•3 10E•2 10E•i 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR FLOW {~) 100 1138 ~~ ,~~ ~' ~3~ ~11~ ~~~ ,, ~~, ~> a ~ 3 } 3~f SO 7701 --~ ~z ~~~~ ,z ;~ a a ,,~~i >l $~ 25 5045 ~ ;°-. 1i ' ;;; '~ ~E~ ~~ 2 681 - ~..,~,w„,„_.~.> > , ~ ~ ; ~ ~ ~ ~ ( , ~~,, €'j 5 x1.518 ~ ~,° £ i~ ` i ~ 2 , SA59 'early Peaks for Developed W/Pond r CLEARHIS BSN 01 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN 01 0 10 7 83 BSN 01 0 17 7 83 BSN 01 0 28 7 83 BSN 01 0 33 7 83 BSN 01 0 35 7 83 BSN 01 0 38 7 83 yr Drainage Area: BSN 01 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur. 24 00 hrs Area CN Pervious 0.0690 ac 78 00 Impervious 0.3680 ac 98 00 Total 0.4370 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Pervious TC Data: Flow type: Description• Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN 02 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN 02 0 21 8 00 BSN 02 0 36 8 00 BSN 02 0 55 8 00 BSN 02 0 65 8 00 BSN 02 0 70 8 00 BSN 02 0 75 8 00 yr Drainage A rea: BSN 02 Hyd Method. SBUH Hyd Peak Factor 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0 0627 ac 78.00 Impervious 0.7959 ac 98 00 Total 0 8586 ac Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0335 0 44 SBUH/SCS TYPEIA 6 mo 0 0572 0 44 SBUH/SCS TYPEIA 2 yr 0 0914 0 44 SBUH/SCS TYPEIA 10 yr 0 1088 0 44 SBUH/SCS TYPEIA 25 yr 0 1176 0 44 SBUH/SCS TYPEIA 50 yr 0 1263 0 44 SBUHlSCS TYPEIA 100 Loss Method• SCS CN Number SCS Abs• 0 20 Inty 10.00 min TC 0.03 hrs 0 06 hrs 0 0690 ac 0 2769 ac 0 0911 ac Length. Slope: Coeff• Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length. Slope: 304 00 ft 1 27% 18 00 ft 2 00% 105 00 ft 0 50% 5.00 ft 2.00% Coeff. Travel Time 27 0000 1 67 min 0 0110 0.39 min 21 0000 1 18 min 0.0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0713 0 86 SBUH/SCS TYPEIA 6 mo 0 1202 0 86 SBUH/SCS TYPEIA 2 yr 0 1895 0 86 SBUH/SCS TYPE1A 10 yr 0 2245 0 86 SBUH/SCS TYPE1A 25 yr 0 2420 0 86 SBUH/SCS TYPEIA 50 yr 0 2596 0 86 SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs• 0 20 Intv. 10 00 min TC 0.03 hrs 0 09 hrs Supporting Data: Pervious CN Data: Type B Sods 78.00 0.0627 ac Impervious CN Data: ROADWAY 98.00 0 7754 ac SIDWALK 98 00 0.0205 ac Pervious TC Data: Flow type: Description Length: Slope. Coeff: Travel Time Sheet Across Planter Stnp 6.00 ft 2 00% 0 2400 1 90 mm Impervious TC Data: Flow type: Description. Length Slope Coeff. Travel Time Shallow Along Flow Line of Gutter 360 00 ft 1.00% 27.0000 2.22 mm Sheet Across Parking 24 00 ft 2 00% 0 0110 0 49 min Channel Through Strom Water Pipe 238.00 ft 0.50% 21.0000 2.67 mm Sheet Across Sidewalks 5 00 ft 2 00% 0.0110 0.14 mm ADDHYD [BSN 01] AS [6 mo] [BSN 02] AS [6 mo] TO [BSN 01 +BSN 02] Peak Flow: 0 3111 cfs Peak Time 8 00 hrs Hyd Vol: 4564.69 cf - 0.1048 acft ADDHYD [BSN 01] AS [2 yr] [BSN 02] AS [2 yr] TO [BSN 01 +BSN 02] Peak Flow: 0.5212 cfs Peak Time 8 00 hrs Hyd Vol 7727.89 cf - 0 1774 acft ADDHYD [BSN 01] AS [10 yr] [BSN 02] AS [10 yr] TO [BSN 01 +BSN 02] Peak Flow. 0.8176 cfs Peak Time 7 83 hrs Hyd Vol. 12235.76 cf - 0.2809 acft ADDHYD [BSN 01] AS [25 yr] [BSN 02] AS [25 yr] TO [BSN 01 +BSN 02] Peak Flow 0.9685 cfs Peak Time 7 83 hrs Hyd Vol 14517 66 cf - 0.3333 acft ADDHYD [BSN 01] AS [50 yr] [BSN 02] AS (50 yr] TO [BSN 01 +BSN 02] Peak Flow 1.0441 cfs Peak Time 7 83 hrs Hyd Vol 15662.58 cf - 0.3596 acft ADDHYD [BSN 01] AS [100 yr] [BSN 02] AS [100 yr] TO [BSN 01 +BSN 02] Peak Flow: 1.1199 cfs Peak Time: 7.83 hrs Hyd Vol: 16810 00 cf - 0 3859 acft Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int 10 00 min Base Flow Peak Flow 1.1199 cfs Peak Time 7.83 hrs Hyd Vol: 0 3859 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0038 8 67 0 4640 16.50 0 1521 0.83 0 0148 8 83 0 3943 16 67 0 1521 1 00 0 0277 9 00 0 3976 16 83 0 1521 1 17 0 0423 9 17 0 3445 17 00 0 1522 1 33 0 0562 9 33 0 2968 17 17 0 1468 1 50 0 0655 9 50 0 2993 17 33 0 1419 1 67 0 0763 9 67 0 2828 17 50 0 1422 1 83 0 0860 9 83 0 2687 17 67 0 1421 2 00 0 0921 10 00 0 2696 17 83 0 1422 2 17 0 1008 10 17 0 2537 18 00 0 1422 2 33 0 1088 10 33 0 2394 18 17 0 1369 2 50 0 1129 10 50 0 2402 18 33 0 1319 2 67 0 1166 10 67 0 2295 18 50 0 1322 2 83 0 1197 10 83 0 2200 18 67 0 1321 3 00 0 1223 11 00 0 2205 18 83 0 1322 3 17 0 1247 11 17 0 2151 19 00 0 1322 3 33 0 1268 11 33 0 2104 19 17 0 1268 3 50 0 1286 11 50 0 2108 19 33 0 1219 3 67 0 1344 11 67 0 2055 19 50 0 1222 3 83 0 1400 11 83 0 2007 19 67 0 1221 4 00 0 1414 12 00 0 2011 19 83 0 1221 4 17 0 1514 12 17 0 1957 20 00 0 1221 4 33 0 1611 12 33 0 1909 20 17 0 1222 4 50 0 1621 12 50 0 1913 20 33 0 1222 4 67 0 1723 12 67 0 1859 20 50 0 1222 4 83 0 1820 12 83 0 1811 20 67 0 1222 5 00 0 1834 13 00 0 1814 20 83 0 1222 517 01941 1317 01814 2100 01223 5 33 0 2043 13 33 0.1815 21 17 0 1223 5 50 0 2055 13 50 0 1815 21 33 0 1223 5 67 0 2162 13 67 0 1763 21 50 0 1223 5 83 0 2265 13 83 0 1714 21 67 0 1223 6 00 0 2275 14 00 0 1717 21 83 0 1223 6 17 0.2479 14 17 0 1717 22 00 0 1224 6 33 0 2673 14 33 0 1717 22 17 0 1170 6 50 0 2682 14 50 0 1718 22 33 0 1120 6 67 0 2989 14 67 0 1665 22 50 0 1123 6 83 0 3278 14 83 0 1616 22 67 0 1122 7 00 0 3285 15 00 0 1619 22 83 0 1122 7 17 0.3650 15 17 0 1619 23 00 0 1122 7 33 0 3991 15 33 0 1619 23 17 0 1123 7 50 0 3997 15 50 0 1620 23 33 0 1123 7 67 0 7693 15 67 0 1566 23 50 0 1123 7 83 1 1199 15 83 0.1518 23 67 0 1123 8 00 1 1156 16 00 0 1521 23 83 0 1123 8 17 0 8191 16 17 0 1520 24 00 0 1123 8 33 0 5327 16 33 0 1520 24 17 0 0527 8 50 0 5472 16 50 0 1521 24 33 0.0018 Hydrograph ID: BASIN O Area 1.2956 ac Hyd Int. 10.00 min Base Flow. . Peak Flow 1 1199 cfs Peak Time: 7.83 hrs Hyd Vol: 0 3859 acft MOVENYD [ BASIN O] TO (BASIN O - 6 mo] AS [6 mo] Peak Flow 0.3111 cfs Peak Time 8.00 hrs Hyd Vol 4564.69 cf - 0 1048 acft MOVEHYD [BASIN O] TO [BASIN O - 100 yr] AS [100 yr] Peak Flow 1.1199 cfs Peak Time. 7.83 hrs Hyd Vol. 16810 00 cf - 0 3859 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip. Multiple Orifice Start EI Max EI Increment 325 0000 ft 331.3000 ft 0.10 Infil: 10.00 in/hr Multiplier 1 00 Reach ID: BIOSWALE O Section Properties: Shape Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 200 0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh~1v Up Node Dn Node Up Invert DUMMY O 0.0000 ft Conduit Con straints: Mm Vel Max Vel Min Cov 0.5000 ft 1 0000 ft 3 0000 ft Routing Method Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3.OOh~ 1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0 5000 ft 2 0000 ft 0 0000 ft In/Exfll 10 0000 in/hr Hold Up Hold Dn NO Match Inv Allow Smaller Conduit Summary: NO YES NO Trib Area 1 2956 ac Flow Ca acit 1.1199 cf 1 1p99 cf Velocity Normal Depth Ent Loss Exit Loss Frict Loss 1 0000 ft/s Start TW 0.1845 ft 0.000000 ft 0.000000 ft 0 000000 ft 0.0000 ft ROUTEHYD [BASIN O - 6 mo] THRU [BIOSWALE O] USING THUR100Y AND [6 RELATIVE Z Reach / Hyd Area Flow Full Q % Full nDepth Size m V o] ERO n el fVel CBasin °-'- ac cfs cfs ratio ft ____ ft/s ft/s ---------- BIOSWALE O 1.2956 0 3111 ____ 1 00 0 0992 Ditch 0 6680 ----- BASIN O ROUTEHYD [BASIN O - 100 yr] THRU [BIOSWALE O RELATIVE ] USING THUR100Y AND [100 yr] ZERO Reach / Hyd Area Flow Full Q % Full nDepth Size nVel fV l e CBasin °°- ac cfs cfs ratio ft ---- ft/s ft/s --------- BIOSWALE O 1 2956 1 1199 ____ 1 00 0 1845 Ditch - 0 9793 --___ BASIN O Node ID: INFILTRATION O Desc: Manhole structure Start EI. 331.3000 ft Contnb Basm. Max EI• 332 5000 ft Len th g Width Contrib Hyd• Void Ratio 200.0000 ft 10 0000 ft 39 00 Bottom area onl with i f y n iltration Node ID: BASIN O RLP Desc: Manhole structure Start EI: 331.3000 ft Contnb Basm Max EI• 332.50000 ft Storage Id. INFILTRATION O Contnb Hyd- Discharge Id: INFILTRATION RLPCOMPUTE [BASIN O RLP] SUMMARY 100 yr MatchQ=PeakQ= 1 1199 cfs Peak Out Q 0.7391 cfs -Peak Stg. 332 43 ft -Active Vol: 1880 85 WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -O Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin 0 Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 DEVELOPED LAND USE Basin Basin O Flows To Bio-Infiltration Swale O Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.5 IMPERVIOUS: 1.31 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale 0 Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 330.8 0.046 0.000 0.000 0.000 330.9 0.048 0.004 0.000 0.463 331.0 0.050 0.007 0.000 0.463 331.0 0.053 0.012 0.000 0.463 331.1 0.055 0.016 0.000 0.463 ~~~~v. ~ <%~, _,~~G~~~g,22~~x EXPIRES: I i -22- 0 331.2 0.057 0.020 0.000 0.463 331.3 0.060 0.025 0.000 0.463 X31.3 0.062 0.029 0.411 0.463 331.4 0.064 0.034 1.873 0.463 331.5 0.067 0.039 3.920 0.463 331.6 0.069 0.045 6.416 0.463 331.7 0.071 0.050 9.292 0.463 331.7 0.074 0.056 12.50 0.463 331.8 0.076 0.061 16.01 0.463 331.9 0.078 0.067 19.81 0.463 332.0 0.081 0.074 23.86 0.463 332.0 0.083 0.080 28.15 0.963 332.1 0.086 0.087 32.67 0.463 332.2 0.088 0.093 3'7.92 0.463 332.3 0.090 0.100 42.37 0.463 332.4 0.093 0.107 97.53 0.963 332.4 0.095 0.115 52.88 0.463 332.5 0.098 0.122 58.41 0.463 332.6 0.100 0.130 64.13 0.463 332.7 0.103 0.138 70.02 0.463 332.7 0.105 0.196 76.08 0.463 332.8 0.108 0.154 82.31 0.463 332.9 0.110 0.163 88.70 0.463 333.0 0.113 0.171 95.24 0.463 333.1 0.115 0.180 101.9 0.463 333.1 0.118 0.189 108.8 0.463 333.2 0.120 0.199 115.8 0.963 333.3 0.123 0.208 122.9 0.463 333.4 0.126 0.218 130.2 0.463 333.9 0.128 0.228 137.6 0.463 333.5 0.131 0.238 145.2 0.963 333.6 0.133 0.248 152.9 0.463 333.7 0.136 0.258 160.7 0.963 333.8 0.139 0.269 168.6 0.463 333.8 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.564016 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.32631 5 year 0.395852 10 year 0.438859 25 year 0.490683 50 year 0.527846 100 year 0.564016 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.094867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1.956 0.301 0.000 1957 0.499 0.000 1958 0.287 0.000 1959 0.336 0.000 1960 0.370 0.000 1961 0.243 0.000 1962 0.266 0.000 1963 0.517 0.000 1964 0.387 0.000 1965 0.359 0.000 1966 0.256 0.000 1967 0.303 0.000 1968 0.244 0.000 1969 0.242 0.000 1970 0.242 0.000 1971 0.300 0.000 1972 0.338 0.000 1973 0.285 0.000 1974 0.331 0.000 1975 0.287 0.000 1976 0.329 0.000 1977 0.918 0.000 1978 0.355 0.000 1979 0.423 0.000 1980 0.317 0.000 1981 0.361 0.000 1982 0.419 0.000 1983 0.449 0.000 1984 0.273 0.000 1985 0.317 0.000 1986 0.348 0.000 1987 0.362 0.000 1988 0.210 0.000 1989 0.251 0.000 1990 0.992 0.000 1991 0.471 0.000 1992 0.309 0.000 1993 0.226 0.000 1994 0.251 0.000 1995 0.364 0.000 1996 0.369 0.000 1997 0.298 0.000 1998 0.417 0.000 1999 0.358 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4992 0.0000 2 0.4918 0.0000 3 0.4707 0.0000 9 0.4490 0.0000 5 0.4230 0.0000 6 0.4194 0.0000 7 0.4182 0.0000 8 0.4168 0.0000 9 0.3873 0.0000 10 0.3703 0.0000 11 0.3693 0.0000 12 0.3639 0.0000 13 0.3619 0.0000 14 0.3610 0.0000 15 0.3587 0.0000 16 0.3581 0.0000 17 0.3554 0.0000 18 0.3984 0.0000 19 0.3376 0.0000 20 0.3364 0.0000 0.3313 0.0000 0.3286 0.0000 0.3173 0.0000 0.3169 0.0000 0.3086 0.0000 0.3032 0.0000 0.3009 0.0000 0.2997 0.0000 0.2976 0.0000 0.2870 0.0000 0.2867 0.0000 0.2846 0.0000 0.2728 0.0000 0.2658 0.0000 0.2559 0.0000 0.2513 0.0000 0.2513 0.0000 0.2443 0.0000 0.2426 0.0000 0.2423 0.0000 0.2420 0.0000 0.2261 0.0000 0.2100 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1632 1058 0 .0 Pass 0.1668 1012 0 .0 Pass 0.1705 935 0 .0 Pass 0.1742 858 0 .0 Pass 0.1779 815 0 .0 Pass 0.1816 790 0 .0 Pass 0.1853 679 0 .0 Pass 0.1889 644 0 .0 Pass 0.1926 600 0 .0 Pass 0.1963 551 0 .0 Pass 0.2000 521 0 .0 Pass 0.2037 479 0 .0 Pass 0.2074 446 0 .0 Pass 0.2110 412 0 .0 Pass 0.2147 381 0 .0 Pass 0.2184 347 0 .0 Pass 0.2221 319 0 .0 Pass 0.2258 307 0 .0 Pass 0.2295 290 0 .0 Pass 0.2331 266 0 .0 Pass 0.2368 246 0 .0 Pass 0.2905 229 0 .0 Pass 0.2442 211 0 .0 Pass 0.2479 198 0 .0 Pass 0.2516 188 0 .0 Pass 0.2552 172 0 .0 Pass 0.2589 167 0 .0 Pass 0.2626 160 0 .0 Pass 0.2663 151 0 .0 Pass 0.2700 194 0 .0 Pass 0.2737 141 0 .0 Pass 0.2774 136 0 .0 Pass 0.2810 130 0 .0 Pass 0.2847 119 0 .0 Pass 0.2884 112 0 .0 Pass 0.2921 107 0 .0 Pass 0.2958 101 0 .0 Pass 0.2995 92 0 .0 Pass 0.3031 86 0 .0 Pass 0.3068 81 0 .0 Pass 0.3105 76 0 .0 Pass 0.3142 70 0 .0 Pass 0.3179 67 0 .0 Pass 0.3216 65 0 .0 Pass 0.3252 60 0 .0 Pass G.3289 56 0 .0 Pass 0.3326 52 0 .0 Pass 0.3363 50 0 .0 Pass 0.3400 45 0 .0 Pass 0.3437 43 0 .0 Pass 0.3473 40 0 .0 Pass 0.3510 36 0 .0 Pass 0.3547 36 0 .0 Pass 0.3589 33 0 .0 Pass 0.3621 27 0 .0 Pass 0.3658 2.9 0 .0 Pass 0.3694 24 0 .0 Pass 0.3731 21 0 .0 Pass 0.3768 21 0 .0 Pass 0.3805 19 0 .0 Pass 0.3842 17 0 .0 Pass 0.3879 17 0 .0 Pass 0.3915 16 0 .0 Pass 0.3952 16 0 .0 Pass 0.3989 15 0 .0 Pass 0.4026 15 0 .0 Pass 0.4063 13 0 .0 Pass 0.4100 12 0 .0 Pass 0.4136 12 0 .0 Pass 0.4173 11 0 .0 Pass 0.4210 9 0 .0 Pass 0.9247 7 0 .0 Pass 0.4284 7 0 .0 Pass 0.4321 7 0 .0 Pass 0.4358 7 0 .0 Pass 0.4394 6 0 .0 Pass 0.4431 6 0 .0 Pass 0.4468 6 0 .0 Pass 0.4505 5 0 .0 Pass 0.4542 5 0 .0 Pass 0.4579 5 0 .0 Pass 0.4615 5 0 .0 Pass 0.4652 5 0 .0 Pass 0.4689 5 0 .0 Pass 0.4726 4 0 .0 Pass 0.4763 9 0 .0 Pass 0.9800 4 0 .0 Pass 0.4836 4 0 .0 Pass 0.4873 4 0 .0 Pass 0.9910 4 0 .0 Pass 0.4947 3 0 .0 Pass 0.4984 2 0 .0 Pass 0.5021 1 0 .0 Pass 0.5057 1 0 .0 Pass 0.5099 1 0 .0 Pass 0.5131 1 0 .0 Pass 0.5168 1 0 .0 Pass 0.5205 0 0 .0 Pass 0.5242 0 0 .0 Pass 0.5278 0 0 .0 Pass Water Quality BMP Elow and Volume. On-line facility volume: 0.171 acre-feet On-line facility target flow: 0.18 cfs. Adjusted for 15 min: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liab]e for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEAR ~ FLOW (tis) 100 ..56Q0 ~-_ - ~ E ~ , ~ . ~ ~ ~ . ~ ` ~/~ L ~ j i ~ 3 i t • 50 5279 ...~.. ~--....sw~ ~ 3 25 4907 ..... 3 ~ i i 1 10 4389 5 _3959 - -- _..... .____.- `~` 3 2 .3263 W ~~ 3 ~ ~ 3 Yearly Peaks for Predeveloped YEAR ,FLOW (~) 100 .56A0 °---_~" ~ ; °;`,~, so sz~a 25 ~ .4907 10 4389 5 ° 3959 2 .3263 i ~ , } ~ ' F Yearly Peaks for developed WIO Pond TEAR FLOW() 100 11 39 ..'.W'W`~"_;W`W. , ; , _ . ~ . ° [ `iI' 1, ~t ;l ~~j` ~3 ~ ~7~~ t 50 7701 ~~~ ~ - j '_,~° i~;1 A ;~; 1 33 x ~f ~i t~'1 25 `J_U`t7 .......~..s.. .......y... v ~ ~ ~3 ~~i ~ `1518 f £ } ~i ~ ; j j { ~ ~ 3 i £ 1 1 2 ~ 5459 Yearly Peaks for Developed WlPond 1QU ~kkkkkk:~kkkYkN7~:~YY.~43!~i'+'%GO<4aXk}~Xk7kTwkkX}< ~ ~.~ d o6~~os~~oaoooa ~ 4~oon~a' o Predeveloped ~~ t x Developed Mitigated c? N 10E-2 1 10 20 30 dO 30 60 IO 80 90 99 Cumulative Probability Flow Frequency Chart 0 53 ..- -- -_ - _ n Predevelope~ ~ o x Developed wift facility o as ... .... a ., ~ 035 . ~ ~. - w ~ 016 _ _ __ _ __ _~ _ __ _ _~ _ ___ _. _~ tC t~ N_ ~ 10E•5 ~ 10E•d 10E•3 10E•2 1061 1 Percent Exceeding Duration Graph 10 CLEARHIS BSN 01 Event Summary: Basmlp Peak Q Peak T Event ------- (cfs) (hrs) BSN 01 0.10 7 83 BSN 01 0 17 7 83 BSN 01 0 28 7 83 BSN 01 0 33 7 83 BSN 01 0 35 7 83 BSN 01 0 38 7 83 yr Drainage Area: BSN 01 Hyd Method: SBUH Hyd Peak Factor. 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0.0690 ac 78 00 Impervious 0 3680 ac 98.00 Total 0.4370 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 Pervious TC Data: Flow type. Description. Sheet Across Planter Stri p Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN 02 Event Summary: BasinlD Peak Q Peak T Event (cfs) (hrs) BSN 02 0 21 8 00 BSN 02 0 36 8 00 BSN 02 0 55 8 00 BSN 02 0 65 8 00 BSN 02 0 70 8 00 BSN 02 0 75 8 00 yr Drainage A rea: BSN 02 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur. 24.00 hrs Area CN Pervious 0.0627 ac 78.00 Impervious 0 7959 ac 98 00 Total 0 8586 ac Peak Vol Area (ac-ft) ac 0 0335 0 44 0 0572 0 44 0 0914 0 44 0 1088 0 44 0 1176 0 44 0 1263 0 44 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPE1A 2 yr SBUH/SCS TYPEIA 10 yr SBUHISCS TYPE1A 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs: 0 20 Intv• 10 00 min TC 0.03 hrs 0 06 hrs 0.0690 ac 0.2769 ac 0 0911 ac Length: Slope: Coeff. Travel Time 6 00 ft 2.00% 0 2400 1.90 min Length Slope. Coeff Travel Time 304 00 ft 1 27% 27.0000 1 67 mm 18.00 ft 2 00% 0 0110 0 39 min 105 00 ft 0 50% 21 0000 1 18 min 5.00 ft 2 00% 0 0110 0 14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0713 0 86 SBUH/SCS TYPEIA 6 mo 0 1202 0 86 SBUHISCS TYPEIA 2 yr 0 1895 0 86 SBUH/SCS TYPEIA 10 yr 0 2245 0 86 SBUH/SCS TYPE1A 25 yr 0 2420 0 86 SBUH/SCS TYPEIA 50 yr 0 2596 0 86 SBUHISCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs 0 20 Intv 10.00 min TC 0.03 hrs 0.09 hrs Supporting Data: Pervious CN Data: Type B Sods 78.00 0.0627 ac Impervious CN Data: ROADWAY 98 00 0 7754 ac SIDWALK 98.00 0 0205 ac Pervious TC Data: Flow type: Uescription• Length Slope: Coeff~ Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description Length' Slope Coeff. Travel Time Shallow Along Flow Line of Gutter 360 00 ft 1.00% 27 0000 2.22 mm Sheet Across Parking 24 00 ft 2 00% 0 0110 0 49 min Channel Through Strom Water Pipe 5 00 ft0 f t 02 00% 0 0100 014 mm Sheet Across Sidewalks ADDHYD [BSN 01] AS [6 mo] [BSN 02] AS [6 mo] TO [BSN 01 +BSN 02] Peak Flow 0.3111 cfs Peak Time. 8.00 hrs Hyd Vol. 4564.69 cf - 0 1048 acft ADDHYD [BSN 01] AS [2 yr] [BSN 02] AS [2 yr] TO [BSN 01 +BSN 02] Peak Flow: 0.5212 cfs Peak Time. 8 00 hrs Hyd Vol. 7727.89 cf - 0.1774 acft ADDHYD [BSN 01] AS [10 yr] [BSN 02] AS [10 yr] TO [BSN 01 +BSN 02] Peak Flow: 0.8176 cfs Peak Time 7 83 hrs Hyd Vol• 12235 76 cf - 0 2809 acft ADDHYD (BSN 01] AS [25 yr] [BSN 02] AS [25 yr] TO [BSN 01 +BSN 02] Peak Flow• 0.9685 cfs Peak Time• 7 83 hrs Hyd Vol• 14517.66 cf - 0.3333 acft ADDHYD [BSN 01] AS [50 yr] [BSN 02] AS [50 yr] TO [BSN 01 +BSN 02] Peak Flow: 1.0441 cfs Peak Time: 7.83 hrs Hyd Vol: 15662 58 cf - 0 3596 acft ADDHYD (BSN 01] AS [100 yr] [BSN 02] AS (100 yr] TO [BSN 01 +BSN 02] Peak Flow: 1.1199 cfs Peak Time: 7.83 hrs Hyd Vol. 16810 00 cf - 0 3859 acft Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int 10 00 min Base Flow: • 3859 acft 0 Peak Flow 1 1199 cfs Peak Time: 7.83 hrs Hyd Vol . . Flow Time Flow Time Flow Time hr cfs hr cfs hr 0 67 cfs 0 0038 8 67 0 4640 16 50 0 1521 0 1521 0 83 0 0148 8 83 0 3943 0 3976 16 67 16 83 0 1521 1 00 0 0277 9 00 9 17 0 3445 17 00 0 1522 1 17 0 0423 9 33 0 2968 17 17 0 1468 1 33 0 0562 9 50 0 2993 17 33 0 1419 1 50 0 0655 0 0763 9 67 0 2828 17 50 0 1422 1 67 1 83 0 0860 9 83 0 2687 17 67 0.1421 0 1422 2 00 0 0921 10 00 0 2696 17 83 18 00 0 1422 2 17 0 1008 10 17 0 2537 0 2394 18 17 0 1369 2 33 0 1088 10 33 10 50 0 2402 18 33 0 1319 2 50 0 1129 10 67 0 2295 18 50 0 1322 2 67 0 1166 10 83 0 2200 18 67 0 1321 2 83 0 1197 0 1223 11 00 0 2205 18 83 0 1322 3 00 0 1247 11 17 0 2151 19 00 0 1322 3 17 1268 0 11 33 0 2104 19 17 0 1268 3 33 . 0 1286 11 50 0 2108 19 33 0 1219 3 50 0 1344 11 67 0 2055 19 50 0 1222 3 67 3 83 0 1400 11 83 0 2007 19 67 0 1221 4 00 0 1414 12 00 0 2011 19 83 0 1221 4 17 0 1514 12 17 0 1957 20 00 0 1221 4 33 0 1611 12 33 0 1909 20 17 0 1222 4 50 0 1621 12 50 0 1913 20 33 0 1222 4 67 0 1723 12 67 0 1859 20 50 0 1222 4 83 0 1820 12 83 0 1811 20 67 0 1222 5 00 0 1834 13 00 0 1814 20 83 0 1222 517 01941 1317 01814 2100 0.1223 5 33 0 2043 13 33 0 1815 21 17 0 1223 5.50 0 2055 13 50 0 1815 21 33 0 1223 5 67 0 2162 13 67 0 1763 21 50 0 1223 5 83 0.2265 13 83 0 1714 21 67 0 1223 6 00 0 2275 14 00 0 1717 21 83 0 1223 6 17 0 2479 14 17 0 1717 22 00 0 1224 6 33 0 2673 14 33 0 1717 22 17 0 1170 6 50 0 2682 14 50 0 1718 22 33 0 1120 6 67 0 2989 14 67 0 1665 22 50 0 1123 6 83 0 3278 14 83 0 1616 22 67 0 1122 7 00 0 3285 15 00 0 1619 22 83 0 1122 7 17 0 3650 15 17 0 1619 23 00 0 1122 7 33 0 3991 15 33 0 1619 23 17 0 1123 7 50 0 3997 15 50 0 1620 23 33 0 1123 7 67 0 7693 15 67 0 1566 23 50 0 1123 7 83 1 1199 15 83 0 1518 23 67 0 1123 8 00 1 1156 16 00 0 1521 23 83 0 1123 8 17 0 8191 16 17 0 1520 24 00 0 1123 8 33 0 5327 16 33 0 1520 24 17 0 0527 8.50 0.5472 16 50 0 1521 24 33 0.0018 Hydrograph ID: BASIN O Area: 1.2956 ac Hyd Int 10 00 min Base Flow: Peak Flow: 1.1199 cfs Peak Time• 7 83 hrs Hyd Vol• 0.3859 acft MOVEHYD [BASIN O] TO [BASIN O - 6 mo] AS [6 mo] Peak Flow 0.3111 cfs Peak Time. 8 00 hrs Hyd Vol 4564.69 cf - 0 1048 acft MOVEHYD [BASIN O] TO [BASIN O - 100 yr] AS [100 yr] Peak Flow. 1.1199 cfs Peak Time: 7 83 hrs Hyd Vol. 16810.00 cf - 0.3859 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 325 0000 ft 331.3000 ft 0.10 Infil• 10.00 in/hr Multiplier. 1 00 Reach ID: BIOSWALE O Section Properties: Shape. Ditch Size Material Manrnngs n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3.OOh.1 v Up Node Dn Node Up Invert DUMMY O 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0 5000 ft 1.0000 ft 3 0000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh:1 v Dn Invert 0.0000 ft Mm Slope Max Slope Mm drop 0.5000 ft 2 0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trlb Area Flow Capacity Velocity Normal Depth 1.2956 ac 1.1199 cf 1.1199 cf 1 0000 ft/s 0 1845 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0 0000 ft ROUTEHYD [BASIN O - 6 mo] THRU [BIOSWALE O] USING THUR100Y AND [6 mo) ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE O 1 2956 0 3111 ---- 1 00 0 0992 Ditch 0 6680 ----- BASIN O ROUTEHYD [BASIN O - 100 yr) THRU [BIOSWALE O] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin /Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE O 1 2956 1 1199 ---- 1 00 0 1845 Ditch 0 9793 ----- BASIN O Node ID: INFILTRATION O Desc Manhole structure Start EI: 331 3000 ft Max EI: 332 5000 ft Contrib Basin: Contnb Hyd. Length Width Vold Ratio 200 0000 ft 10 0000 ft 39.00 Bottom area only with Infiltration Node ID: BASIN O RLP Desc: Manhole structure Start EI: 331.3000 ft Max EI• 332.50000 ft Contnb Basin• Contnb Hyd. Storage Id: INFILTRATION O Discharge Id: INFILTRATION RLPCOMPUTE [BASIN O RLP] SUMMARY 100 yr MatchQ=PeakQ= 1.1199 cfs Peak Out O: 0.7391 cfs -Peak Stg: 332.43 ft -Active Vol. 1880.85 WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -N Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Dat"a End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin N Flows To Point of Corpliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 DEVELOPED LAND USE Basin Basin N Flows To Bio-Infiltration Swale N Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale N Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, ,,, e., ~ , ,,., Depth: aft. Bottom Length: 125ft. Bottom Width 8ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Da.scharcte Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.014 acre-ft. Pond Hydraula.c Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.2 0.023 0.000 0.000 0.000 332.3 0.024 0.00?_ 0.000 0.231 332.4 0.026 0.004 0.000 0.231 332.4 0.027 0.006 0.000 0.231 332.5 0.029 0.008 0.000 0.?_31 ~~ ~~ , v' . <`L~. ,~5~ EpH D,~~`~ r ~Dp wns~t ISO .P ~P~ oo ~ ~~ °j _ s ('~ ~ vv- - ~, ~ ~ . ~OIYAI.b~ld~~ IXPfRES i1-22•~ ~..~..~. 3'32.6 0.030 0.010 0.000 0.231 332.7 0.032 0.013 0.000 0.231 332.7 0.033 0.015 0.411 0.231 332.8 0.035 0.018 1.873 0.231 332.9 0.036 0.021 3.9?_0 0.231 333.0 0.038 0.024 6.416 0.231 333.1 0.039 0.027 9.292 0.231 333.1 0.041 0.030 12.50 0.231 333.2 0.042 0.033 16.01 0.231 333.3 0.049 0.036 19.81 0.231 333.4 0.045 0.040 23.86 0.231 333.4 0.047 0.043 28.15 0.231 333.5 0.049 0.047 32.67 0.231 333.6 0.050 0.051 37.42 0.231 333.7 0.052 0.055 42.37 0.231 333.8 0.053 0.059 47.53 0.231 333.8 0.055 0.063 52.88 0.231 333.9 0.057 0.067 58.91 0.231 334.0 0.058 0.072 64.13 0.231 334.1 0.060 0.077 70.02 0.231 334.1 0.062 0.081 76.08 0.231 334.2 0.063 0.086 82.31 0.231 334.3 0.065 0.091 88.70 0.231 334.4 0.067 0.096 95.24 0.231 334.5 0.068 0.102 101.9 0.231 334.5 0.070 0.107 108.8 0.231 334.6 0.072 0.112 115.8 0.231 334.7 0.074 0.118 122.9 0.231 334.8 0.075 0.129 130.2 0.231 334.8 0.077 0.130 137.6 0.231 334.9 0.079 0.136 145.2 0.231 335.0 0.081 0.142 152.9 0.231 335.1 0.083 0.148 160.7 0.231 335.2 0.084 0.155 168.6 0.231 335.2 0.086 0.162 176.7 0.231 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Predeveloped Flow (cfs) 0.134573 0.163287 0.181047 0.202451 0.217801 0.232742 Periods for Developed Unmitigated Flow (cfs) 0.134573 0.163287 0.181047 0.202451 0.217801 0.232742 Flow Frequency Return Periods for Developed Mita.gated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.124 0.000 1957 0.206 0.000 1958 0.118 0.000 1959 0.139 0.000 1960 0.153 0.000 1961 0.100 0.000 1962 0.110 0.000 1963 0.213 0.000 1964 0.160 0.000 1965 0.198 0.000 1966 0.105 0.000 1967 0.125 0.000 1968 0.101 0.000 1969 0.100 0.000 1970 0.100 0.000 1971 0.124 0.000 1972 0.190 0.000 1973 0.117 0.000 1974 0.137 0.000 1975 0.118 0.000 1976 0.136 0.000 1977 0.172 0.000 1978 0.147 0.000 1979 0.174 0.000 1980 0.131 0.000 1981 0.149 0.000 1982 0.173 0.000 1983 0.185 0.000 1984 0.112 0.000 1985 0.131 0.000 1986 0.144 0.000 1987 0.150 0.000 1988 0.087 0.000 1989 0.104 0.000 1990 0.203 0.000 1991 0.195 0.000 1992 0.127 0.000 1993 0.093 0.000 1994 0.104 0.000 1995 0.150 0.000 1996 0.152 0.000 1997 0.123 0.000 1998 0.172 0.000 1999 0.148 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2058 0.0000 2 0.2028 0.0000 3 0.1948 0.0000 4 0.1851 0.0000 5 0.1744 0.0000 6 0.1729 0.0000 7 0.1724 0.0000 8 0.1718 0.0000 9 0.1597 0.0000 10 0.1526 0.0000 11 0.1522 0.0000 12 0.1500 0.0000 13 0.1996 0.0000 14 0.1489 0.0000 15 0.1480 0.0000 16 0.1476 0.0000 17 0.1465 0.0000 18 0.1437 0.0000 19 0.1397 0.0000 20 0.1387 0.0000 0.1366 0.0000 0.1355 0.0000 0.1308 0.0000 0.1306 0.0000 0.1272 0.0000 0.1252 0.0000 0.1243 0.0000 0.1235 0.0000 0.1227 0.0000 0.1183 0.0000 0.1182 0.0000 0.1173 0.0000 0.1125 0.0000 0.1096 0.0000 0.1055 0.0000 0.1036 0.0000 0.1036 0.0000 0.1007 0.0000 0.1001 0.0000 0.0999 0.0000 0.0997 0.0000 0.0932 0.0000 0.0866 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0673 1057 0 .0 Pass 0.0688 991 0 .0 Pass 0.0703 924 0 .0 Pass 0.0718 853 0 .0 Pass 0.0734 796 0 .0 Pass 0.0749 723 0 .0 Pass 0.0764 676 0 .0 Pass 0.0779 632 0 .0 Pass 0.0799 591 0 .0 Pass 0.0810 547 0 .0 Pass 0.0825 508 0 .0 Pass 0.0840 473 0 .0 Pass 0.0855 993 0 .0 Pass 0.0871 910 0 .0 Pass 0.0886 373 0 .0 Pass 0.0901 349 0 .0 Pass 0.0916 318 0 .0 Pass 0.0931 305 0 .0 Pass 0.0947 288 0 .0 Pass 0.0962 262 0 .0 Pass 0.0977 242 0 .0 Pass 0.0992 226 0 .0 Pass 0.1007 209 0 .0 Pass 0.1023 193 0 .0 Pass 0.1038 184 0 .0 Pass 0.1053 172 0 .0 Pass 0.1068 165 0 .0 Pass 0.1083 159 0 .0 Pass 0.1099 151 0 .0 Pass 0.1114 143 0 .0 Pass 0.1129 141 0 .0 Pass 0.1144 136 0 .0 Pass 0.1159 131 0 .0 Pass 0.1175 117 0 .0 Pass 0.1190 112 0 .0 Pass 0.1205 106 0 .0 Pass 0.1220 99 0 .0 Pass 0.1235 92 0 .0 Pass 0.1251 86 0 .0 Pass 0.1266 80 0 .0 Pass 0.1281 75 0 .0 Pass 0.1296 70 0 .0 Pass 0.1311 66 0 .0 Pass 0.1327 65 0 .0 Pass 0.1342 60 0 .0 Pass 0.1357 54 0 .0 Pass 0.1372 51 0 .0 Pass 0.1387 49 0 .0 Pass 0.1403 43 0 .0 Pass 0.1418 43 0 .0 Fass 0.1433 39 0 .0 Pass 0.1448 36 0 .0 Pass 0.1463 36 0 .0 Pass 0.1479 32 0 .0 Pass 0.1494 27 0 .0 Pass 0.1509 24 0 .0 Pass 0.1524 23 0 .0 Pass 0.1539 21 0 .0 Pass 0.1555 20 0 .0 Pass 0.1570 19 0 .0 Pass 0.1585 17 0 .0 Pass 0.1600 16 0 .0 Pass 0.1615 16 0 .0 Pass 0.1631 16 0 .0 Pass 0.1646 15 0 .0 Pass 0.1661 15 0 .0 Pass 0.1676 13 0 .0 Pass 0.1691 12 0 .0 Pass 0.1707 12 0 .0 Pass 0.1722 11 0 .0 Pass 0.1737 9 0 .0 Pass 0.1752 7 0 .0 Pass 0.1768 7 0 .0 Pass 0.1783 7 0 .0 Pass 0.1798 7 0 .0 Pass 0.1813 6 0 .0 Pass 0.1828 6 0 .0 Pass 0.1844 6 0 .0 Pass 0.1859 5 0 .0 Pass 0.1874 5 0 .0 Pass 0.1889 5 0 .0 Pass 0.1904 5 0 .0 Pass 0.1920 5 0 .0 Pass 0.1935 5 0 .0 Pass 0.1950 4 0 .0 Pass 0.1965 4 0 .0 Pass 0.1980 4 0 .0 Pass 0.1996 4 0 .0 Pass 0.2011 4 0 .0 Pass 0.2026 4 0 .0 Pass 0.2041 3 0 .0 Pass 0.2056 2 0 .0 Pass 0.2072 1 0 .0 Pass 0.2087 1 0 .0 Pass 0.2102 1 0 .0 Pass 0.2117 1 0 .0 Pass 0.2132 1 0 .0 Pass 0.2148 0 0 .0 Pass 0.2163 0 0 .0 Pass 0.2178 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.07 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.09 cfs. Adjusted for 15 m~.n: 0.04 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERP,A Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to emptied warranties of program and accompanying documentation. In no event shall AQUA 'PERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. !rat , Fiona tcts) 1~L1 2$27 ^'~" ~- 10.E kkK;<k;c~tk}TkYr?^~9:~~^Y~D~A4t~fU9K54s~~kkkkk}sk;ck?~ ~ ~ ~ ' ~ ~ ~ 5 0 .21 7 8 - - - ~ ; , _ r 25 ++ [ ~GS ~~ I iii' ~. r ~. 10 1810 ~ ~ ~ ~ 1.0 5 1633 ---- Q! 2 ~ 1346 ~ € ; ° V ~ 10E-1 ~t o~0°~~1°°~'0C'~ De~teloped 6~i ated f , ~ g oavvvbva _ ~ ,; ~ Ci 3 v I~"L r ~~ ' 1 10 20 ]0 d0 50 60 70 80 90 99 CumulativR Prehahilily Yearly Peaks for Predeveloped Flow Frequency Chart 0 22 - -- . _ _ ~ ~ _ _ _ _ __ _ _ ~ ~ Predevgd__ __ x Developed w~ Facility 018 ... ..... ~ .. .. , . ~ 014 _~ _ ~ _ __-~ r ~_ v- '~-"' 010 -___.. . _._~ ~ _ ~_ - _ ___ Q> 007 __ ____ _ ~_ -. _ _. .._._ L ti _H O 10E-5 ~ 10E•4 10E•3 10f•2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR .FLOW (Ns) 100 11 38 - ~ ~~~ i~ 1`~ ~j 50 7701 ~ _ `~39~~` 25 ` 5.045 -` ---, ~ ' ~ ~ ~ , , ~ ~ ~~ 1 ` ~ ? ~~ i it 10 2681 --°°"~'° } ~ ` ~ ' i ` , ,:..a.ya.-..........,.. i I I i ~ 5 1518 ,~~ _ .~~ 2 3459 ~ i 1 ` ` ' ~ _ i early Peaks for Developed W/Pond CLEARHIS BASIN N Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BASIN N 0.16 8 00 BASIN N 0 27 8 00 BASIN N 0 42 8 00 BASIN N 0 50 8 00 BASIN N 0 54 8 00 BASIN N 0 58 8 00 yr Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0546 0 68 SBUH/SCS TYPEIA 6 mo 0 0924 0 68 SBUH/SCS TYPEIA 2 yr 0 1465 0 68 SBUH/SCS TYPEIA 10 yr 0 1739 0 68 SBUH/SCS TYPE1A 25 yr 0 1876 0 68 SBUH/SCS TYPE1A 50 yr 0 2014 0 68 SBUH/SCS TYPE1A 100 Drainage Area: BASIN N Hyd Method. SBUH Hyd Peak Factor: 484 00 Storm Dur. 24.00 hrs Area CN Pervious 0.0727 ac 78 00 Impervious 0.6054 ac 98 00 Total 0.6781 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type• Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method. SCS CN Number SCS Abs 0.20 Intv. 10 00 min TC 0 03 hrs 0 12 hrs 0.0727 ac 0.4280 ac 0.1774 ac Length: Slope: Coeff• Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length Slope Coeff: Travel Time 370 00 ft 0.50% 27.0000 4.29 mm 27 00 ft 2.00% 0 0110 0 54 min 215 00 ft 0 50% 21 0000 2 41 min 5.00 ft 2 00% 0 0110 0.14 min MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow: 0.1595 cfs Peak Time 8 00 hrs Hyd Vol: 2376 28 cf - 0 0546 acft MOVEHYD [BASIN N] TO [BASIN N - 2 yr] AS [2 yr] Peak Flow• 0.2680 cfs Peak Time• 8.00 hrs Hyd Vol. 4026 78 cf - 0 0924 acft MOVEHYD [BASIN N] TO [BASIN N -10 yr] AS [10 yr] Peak Flow: 0.4214 cfs Peak Time. 8.00 hrs Hyd Vol• 6381 20 cf - 0.1465 acft MOVEHYD [BASIN N] TO [BASIN N - 25 yr] AS [25 yr] Peak Flow: 0 4985 cfs Peak Time. 8 00 hrs Hyd Vol. 7573 61 cf - 0.1739 acft MOVEHYD [BASIN N] TO [BASIN N - 50 yr] AS [50 yr] Peak Flow• 0.5372 cfs Peak Time: 8.00 hrs Hyd Vol 8172 06 cf - 0.1876 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow: 0.5759 cfs Peak Time. 8 00 hrs Hyd Vol: 8771.93 cf - 0.2014 acft Hydrograph ID: BASIN N - 100 yr Area: 0.6781 ac Hyd Int: 10 00 min Base Flow Peak Flow• 0.5759 cfs Peak Time. 8 00 hrs Hyd Vol 0.2014 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0016 8 83 0 2148 16 67 0 0795 0 83 0 0064 9 00 0 2088 16 83 0 0795 1 00 0 0128 9 17 0 1855 17 00 0 0795 1 17 0 0201 9 33 0 1609 17 17 0 0773 1 33 0 0274 9 50 0 1571 17 33 0 0748 1 50 0 0328 9 67 0 1495 17 50 0 0744 1 67 0 0383 9 83 0 1421 17 67 0 0743 1 83 0.0434 10 00 0 1410 17 83 0 0743 2 00 0 0470 10 17 0 1341 18 00 0 0743 2 17 0.0513 10 33 0 1268 18 17 0 0721 2 33 0 0555 10 50 0 1257 18 33 0 0696 2 50 0 0581 10 67 0 1210 18 50 0 0692 2 67 0 0601 10 83 0 1161 18 67 0 0691 2 83 0 0618 11 00 0 1153 18 83 0 0691 3 00 0 0633 11 17 0 1130 19 00 0 0691 3 17 0 0645 11 33 0 1105 19.17 0 0668 3 33 0 0657 11 50 0 1102 19 33 0 0643 3 50 0 0666 11 67 0 1079 19 50 0 0639 3 67 0 0692 11 83 0 1054 19 67 0 0638 3 83 0 0721 12 00 0 1051 19 83 0.0638 4 00 0 0733 12 17 0 1028 20 00 0 0638 4 17 0 0776 12 33 0 1003 20 17 0 0639 4 33 0 0825 12 50 0 1000 20 33 0 0639 4 50 0 0840 12 67 0 0977 20 50 0 0639 4 67 0 0884 12 83 0 0952 20 67 0 0639 4 83 0 0935 13 00 0 0949 20 83 0 0639 5 00 0 0951 13 17 0 0948 21 00 0 0639 5 17 0 0998 13 33 0 0948 21 17 0 0639 5 33 0 1051 13 50 0 0948 21 33 0.0639 5 50 0 1067 13 67 0 0926 21 50 0 0639 5 67 0 1114 13 83 0 0901 21 67 0 0639 5 83 0 1167 14 00 0 0898 21 83 0 0640 6 00 0 1182 14 17 0 0897 22 00 0 0640 6 17 0 1269 14 33 0 0897 22.17 0.0617 6 33 0 1368 14 50 0 0898 22 33 0 0592 6 50 0 1393 14 67 0 0875 22 50 0 0588 6 67 0 1524 14 83 0 0850 22 67 0 0587 6 83 0 1672 15 00 0 0847 22 83 0 0587 7 00 0 1706 15 17 0 0846 23 00 0 0587 7 17 0 1863 15 33 0 0846 23 17 0 0587 7 33 0 2039 15 50 0 0846 23 33 0 0587 7 50 0 2077 15 67 0 0824 23 50 0 0587 7 67 0 3626 15 83 0 0799 23 67 0 0587 7 83 0 5414 16 00 0 0795 23 83 0 0587 8 00 0 5759 16 17 0 0794 24 00 0 0587 8.17 0 4570 16 33 0 0795 24 17 0 0334 8 33 0 3127 16 50 0 0795 24 33 0 0061 8 50 0 2903 16 67 0 0795 24 50 0 0012 8 67 0 2516 16 83 0 0795 24 67 0 0002 Hydrograph ID: BASIN N - 100 yr Area: 0 6781 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 0 5759 cfs Peak Time: 8.00 hrs Hyd Vol: 0.2014 acft MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow 0 1595 cfs Peak Time 8.00 h rs Hyd Vol• 2376 28 cf - 0 0546 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow 0 5759 cfs Peak Time: 8 00 hrs Hyd Vol 8771 93 cf - 0.2014 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 327.0000 ft 332.7000 ft 0.10 Infil: 10.00 in/hr Multiplier 1.00 Reach ID: BIO SWALE N Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 125.0000 ft 1 00 Width Bank Hgt ss1 8.0000 ft 3 0000 ft 3.OOh 1 v Up Node Dn Node Up Invert DUMMY N 0 0000 ft Conduit Cons traints: Min Vef Max Vel Min Cov 0.5000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.6781 ac 0.4283 cf 0.4283 cf Ent Loss Exit Loss Frict Loss 0 000000 ft 0.000000 ft 0 000000 ft Routing Method Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh.1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0.5000 ft 2.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 1.4197 ft/s 0.1331 ft Start TW 0.0000 ft ROUTEHYD [BASIN N - 6 mo] THRU [BIO SWALE N] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 1595 ---- 1 00 0 0920 Ditch 0 5914 ----- BASIN N ROUTEHYD [BASIN N - 100 yr] THRU [B10 SWALE N] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 5759 ---- 1 00 0 2331 Ditch 0 9419 ----- BASIN N Node ID: INFILTRATION N Desc. Manhole structure Start EI. 332.7000 ft Max EI 333 7000 ft Contrib Basin Contrib Hyd: Length Width Void Ratio 125 0000 ft 8.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN N RLP Desc~ Manhole structure Start EI: 332.7000 ft Max EI: 333.7000 ft Contnb Basin Contrib Hyd Storage Id: INFILTRATION N Discharge Id. INFILTRATION RLPCOMPUTE [BASIN N RLP] SUMMARY 100 yr MatchO=PeakQ= 0.4283 cfs Peak Out O: 0 1042 cfs -Peak Stg• 333.87 ft - Active Vol. 954 46 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -N Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin N Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 DEVELOPED LAND USE Basin Basin N Flows To Bio-Infiltration Swale N Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale N Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n,..,e„~,,,..~ Depth: aft. Bottom Length: 125ft. Bottom Width 8ft. Side slope l: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.014 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraula.c Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.2 0.023 0.000 0.000 0.000 332.3 0.029 0.002 0.000 0.231 332.4 0.026 0.004 0.000 0.231 332.4 0.027 0.006 0.000 0.231 332.5 0.029 0.008 0.000 0.231 `~i® ~U~ eQ~ f gEPH D,~~~ ,- fop wns~( j~0 'P q~ co 4 ~~ 9 AZ k ~ 3a s.> O K Ae ~C~S 1 EKE ~~(' ~ ~ONIALb~'`~ ~.+~ _ p.~.,,,.~_ s Dye-22• ~ IXPiR ~~ 332.6 0.030 0.010 0.000 0.231 332.7 0.032 0.013 0.000 0.231 332.7 0.033 0.015 0.411 0.231 332.8 0.035 0.018 1.873 0.231 332.9 0.036 0.021 3.920 0.231 333.0 0.038 0.024 6.416 0.231 333.1 0.039 0.027 9.292 0.231 333.1 0.041 0.030 12.50 0.231 333.2 0.042 0.033 16.01 0.231 333.3 0.099 0.036 19.81 0.231 333.4 0.045 0.040 23.86 0.231 333.4 0.047 0.043 28.15 0.231 333.5 0.049 0.097 3?_.h7 0.7.31 333.6 0.050 0.051 37.92 0.231 333.7 0.052 0.055 42.37 0.231 333.8 0.053 0.059 47.53 0.231 333.8 0.055 0.063 52.88 0.231 333.9 0.057 0.067 58.41 0.231 334.0 0.058 0.072 64.13 0.231 339.1 0.060 0.077 70.02 0.231 334.1 0.062 0.081 76.08 0.231 334.2 0.063 0.086 82.31 0.231 334.3 0.065 0.091 88.70 0.231 334.4 0.067 0.096 95.24 0.231 334.5 0.068 0.102 101.9 0.231 334.5 0.070 0.107 108.8 0.231 334.6 0.072 0.112 115.8 0.231 334.7 0.074 0.118 122.9 0.231 334.8 0.075 0.124 130.2 0.231 334.8 0.077 0.130 137.6 0.231 334.9 0.079 0.136 145.2 0.231 335.0 0.081 0.192 152.9 0.231 335.1 0.083 0.148 160.7 0.231 335.2 0.084 0.155 168.6 0.231 335.2 0.086 0.162 176.7 0.231 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(efs) 2 year 0.134573 5 year 0.163287 10 year 0.181047 25 year 0.202451 50 year 0.217801 100 year 0.232742 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Flow (cfs ) Developed Unmitigated Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year 0.134573 0.163287 0.181047 0.202451 0.217801 0.232742 Periods for Flow (cfs) Developed Mitigated 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.124 0.000 1957 0.206 0.000 1958 0.118 0.000 1959 0.139 0.000 1960 0.153 0.000 1961 0.100 0.000 1962 0.110 0.000 1963 0.213 0.000 1964 0.160 0.000 1965 0.148 0.000 1966 0.105 0.000 196"7 0.125 0.000 1968 0.101 0.000 1969 0.100 0.000 1970 0.100 0.000 1971 0.124 0.000 1972 0.140 0.000 1973 0.117 0.000 1974 0.137 0.000 1975 0.118 0.000 1976 0.136 0.000 1977 0.172 0.000 1978 0.147 0.000 1979 0.174 0.000 1980 0.131 0.000 1981 0.149 0.000 1982 0.173 0.000 1983 0.185 0.000 1984 0.112 0.000 1985 0.131 0.000 1986 0.144 0.000 1987 0.150 0.000 1988 0.087 0.000 1989 0.104 0.000 1990 0.203 0.000 1991 0.195 0.000 1992 0.127 0.000 1993 0.093 0.000 1994 0.104 0.000 1995 0.150 0.000 1996 0.152 0.000 1997 0.123 0.000 1998 0.172 0.000 1999 0.148 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2058 0.0000 2 0.2028 0.0000 3 0.1948 0.0000 4 0.1851 0.0000 5 0.1744 0.0000 6 0.1729 0.0000 7 0.1724 0.0000 8 0.1718 0.0000 9 0.1597 0.0000 10 0.1526 0.0000 11 0.1522 0.0000 12 0.1500 0.0000 13 0.1496 0.0000 14 0.1489 0.0000 15 0.1480 0.0000 16 0.1476 0.0000 17 0.1465 0.0000 18 0.1437 0.0000 19 0.1397 0.0000 20 0.1387 0.0000 0.1366 0.0000 0.1355 0.0000 0.1308 0.0000 0.1306 0.0000 0.1272 0.0000 0.1252 0.0000 0.1293 0.0000 0.1235 0.0000 0.1227 0.0000 0.1183 0.0000 0.1182 0.0000 0.1173 0.0000 0.1125 0.0000 0.1096 0.0000 0.1055 0.0000 0.1036 0.0000 0.1036 0.0000 0.1007 0.0000 0.1001 0.0000 0.0999 0.0000 0.0997 0.0000 0.0932 0.0000 0.0866 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0673 1057 0 .0 Pass 0.0688 991 0 .0 Pass 0.0703 924 0 .0 Pass 0.0718 853 0 .0 Pass 0.0734 796 0 .0 Pass 0.0749 723 0 .0 Pass 0.0764 676 0 .0 Pass 0.0779 632 0 .0 Pass 0.0799 591 0 .0 Pass 0.0810 547 0 .0 Pass 0.0825 508 0 .0 Pass 0.0840 473 0 .0 Pass 0.0855 443 0 .0 Pass 0.0871 410 0 .0 Pass 0.0886 373 0 .0 Pass 0.0901 349 0 .0 Pass 0.0916 318 0 .0 Pass 0.0931 305 0 .0 Pass 0.0947 288 0 .0 Pass 0.0962 262 0 .0 Pass 0.0977 242 0 .0 Pass 0.0992 226 0 .0 Pass 0.1007 209 0 .0 Pass 0.1023 193 0 .0 Pass 0.1038 184 0 .0 Pass 0.1053 172 0 .0 Pass 0.1068 165 0 .0 Pass 0.1083 159 0 .0 Pass 0.1099 151 0 .0 Pass 0.1114 143 0 .0 Pass 0.1129 141 0 .0 Pass 0.1144 136 0 .0 Pass 0.1159 131 0 .0 Pass 0.1175 117 0 .0 Pass 0.1190 112 0 .0 Pass 0.1205 106 0 .0 Pass 0.1220 99 0 .0 Pass 0.1235 92 0 .0 Pass 0.1251 86 0 .0 Pass 0.1266 80 0 .0 Pass 0.1281 75 0 .0 Pass 0.1296 70 0 .0 Pass 0.1311 66 0 .0 Pass 0.1327 65 0 .0 Pass 0.1342 60 0 .0 Pass 0.1357 54 0 .0 Pass 0.1372 51 0 .0 Pass 0.1387 49 0 .0 Pass 0.1403 43 0 .0 Pass 0.1418 43 0 .0 Fass 0.1433 39 0 .0 Pass 0.1448 36 0 .0 Pass 0.1463 36 0 .0 Pass 0.1479 32 0 .0 Pass 0.1494 27 0 .0 Pass 0.1509 24 0 .0 Pass 0.1529 23 0 .0 Pass 0.1539 21 0 .0 Pass 0.1555 20 0 .0 Pass 0.1570 19 0 .0 Pass 0.1585 17 0 .0 Pass 0.1600 16 0 .0 Pass 0.1615 16 0 .0 Pass 0.1631 16 0 .0 Pass 0.1646 15 0 .0 Pass 0.1661 15 0 .0 Pass 0.1676 13 0 .0 Pass 0.1691 12 0 .0 Pass 0.1707 12 0 .0 Pass 0.1722 11 0 .0 Pass 0.1737 9 0 .0 Pass 0.1752 7 0 .0 Pass 0.1768 7 0 .0 Pass 0.1783 7 0 .0 Pass 0.1798 7 0 .0 Pass 0.1813 6 0 .0 Pass 0.1828 6 0 .0 Pass 0.1844 6 0 .0 Pass 0.1859 5 0 .0 Pass 0.1874 5 0 .0 Pass 0.1889 5 0 .0 Pass 0.1904 5 0 .0 Pass 0.1920 5 0 .0 Pass 0.1935 5 0 .0 Pass 0.1950 4 0 .0 Pass 0.1965 4 0 .0 Pass 0.1980 4 0 .0 Pass 0.1996 4 0 .0 Pass 0.2011 4 0 .0 Pass 0.2026 4 0 .0 Pass 0.2041 3 0 .0 Pass 0.2056 2 0 .0 Pass 0.2072 1 0 .0 Pass 0.2087 1 0 .0 Pass 0.2102 1 0 .0 Pass 0.2117 1 0 .0 Pass 0.2132 1 0 .0 Pass 0.2148 0 0 .0 Pass 0.2163 0 0 .0 Pass 0.2178 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.07 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.09 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 ~9kkk?'kkkkkk?'YJ4t~.'pgtXtcXkk?c?tk?ckkkk?K u 1.0 ... ~ t8E-1 ~ Qo6o4ocscao~>~`i0°m.cx~beve op a Mitigated t] 1ae,2 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart PEAR PIONI (~) 100 ; 2327 --- ~ x Developed ~r~ iaciiRy 25 .2025 , , ' ` ~ 018 . ~ ~ - -~ ... < ~- 10 1810 - -~-- 014 -. - . 5 1833 ~ `~l ~, ~~ ~C3 _ _ ~ ___ ~~ __ _ _ - ~, ,~_ ~~ ~ ~~, .'""' 010 ',~ ~ ~ +~ 2 13~ --~~t~---m- ~~ ~ ~ __~ __ - __ ~. ~_ _ r , __ ~~`~1~; ; ' 0 07 3 ~ ..AA ~ ~ 10E~5 a 10E•d 10E•3 1f~•2 10E•1 1 10 Percent Ext;eedin Yearly Peaks for developed W/O Pond Duration Graph TEAR FIOW (cis) 1~ 1138 , ~i' ~` ~ ~~° ~~ , ~ ! ' It ~~ ~~ 50 7 701 t;s ~ F °; ,; ~(~ ~ >~' i _ ~,~ , ,} ~~r 25 5045 ~, ~ ~ =!~I 10 .2 681 __.__. ~ _ ..,~..._.;.1. < < ' ; ~ ~ ; ; ~~~ `~~ 4i ,, < 5 1518 5~~ __ ~ i 1 ~ t 2 'early Peaks for Developed W/Pond CLEARHIS BASIN N Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BASIN N 0 16 8 00 BASIN N 0 27 8 00 BASIN N 0 42 8 00 BASIN N 0 50 8 00 BASIN N 0 54 8 00 BASIN N 0 58 8 00 yr Drainage Area: BASIN N Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.0727 ac 78.00 Impervious 0 6054 ac 98.00 Total 0.6781 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type• Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0546 0 68 SBUH/SCS TYPEIA 6 mo 0 0924 0 68 SBUH/SCS TYPEIA 2 yr 0 1465 0 68 SBUH/SCS TYPEIA 10 yr 0 1739 0 68 SBUH/SCS TYPEIA 25 yr 0 1876 0 68 SBUH/SCS TYPEIA 50 yr 0 2014 0.68 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs 0.20 Intv. 10 00 min TC 0.03 hrs 0 12 hrs 0.0727 ac 0.4280 ac 0 1774 ac Length: Slope: Coeff Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length: Slope: Coeff Travel Time 370.00 ft 0 50% 27 0000 4 29 min 27 00 ft 2.00% 0.0110 0.54 min 215.00 ft 0.50% 21.0000 2.41 min 5 00 ft 2.00% 0.0110 0.14 min MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow. 0.1595 cfs Peak Time 8.00 hrs Hyd Vol: 2376 28 cf - 0.0546 acft MOVEHYD [BASIN N] TO [BASIN N - 2 yr] AS [2 yr] Peak Flow. 0.2680 cfs Peak Time: 8.00 hrs Hyd Vol. 4026.78 cf - 0 0924 acft MOVEHYD [BASIN N] TO [BASIN N - 10 yr] AS [10 yr] Peak Flow: 0 4214 cfs Peak Time: 8.00 hrs Hyd Vol 6381.20 cf - 0 1465 acft MOVEHYD [BASIN N] TO [BASIN N - 25 yr] AS [25 yr] Peak Flow: 0.4985 cfs Peak Time. 8 00 hrs Hyd Vol 7573 61 cf - 0.1739 acft MOVEHYD [BASIN N] TO [BASIN N - 50 yr] AS [50 yr] Peak Flow• 0 5372 cfs Peak Time. 8 00 hrs Hyd Vol 8172 06 cf - 0 1876 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow: 0 5759 cfs Peak Time• 8 00 hrs Hyd Vol- 8771.93 cf - 0 2014 acft Hydrograph ID: BASIN N - 100 yr Area. 0.6781 ac Hyd Int. 10 00 min Base Flow• Peak Flow: 0.5759 cfs Peak Time• 8 00 hrs Hyd Vol. 0.2014 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0016 8 83 0 2148 16 67 0 0795 0 83 0 0064 9 00 0 2088 16 83 0 0795 1 00 0 0128 9 17 0 1855 17 00 0 0795 1 17 0 0201 9 33 0 1609 17 17 0 0773 1 33 0 0274 9 50 0 1571 17 33 0 0748 1 50 0 0328 9 67 0 1495 17 50 0 0744 1 67 0 0383 9 83 0 1421 17 67 0 0743 1 83 0 0434 10 00 0 1410 17 83 0 0743 2 00 0 0470 10 17 0 1341 18 00 0 0743 2 17 0 0513 10 33 0 1268 18 17 0 0721 2 33 0 0555 10 50 0 1257 18 33 0 0696 2 50 0 0581 10 67 0 1210 18 50 0 0692 2 67 0 0601 10 83 0 1161 18 67 0 0691 2 83 0.0618 11 00 0 1153 18 83 0 0691 3 00 0 0633 11 17 0 1130 19 00 0 0691 3 17 0 0645 11 33 0 1105 19 17 0 0668 3 33 0 0657 11 50 0 1102 19 33 0 0643 3 50 0 0666 11 67 0 1079 19 50 0 0639 3 67 0.0692 11 83 0 1054 19 67 0 0638 3 83 0 0721 12 00 0 1051 19 83 0 0638 4 00 0 0733 12 17 0 1028 20 00 0 0638 4 17 0 0776 12 33 0 1003 20 17 0 0639 4 33 0 0825 12 50 0 1000 20 33 0 0639 4 50 0 0840 12 67 0 0977 20.50 0 0639 4 67 0 0884 12 83 0 0952 20 67 0 0639 4 83 0 0935 13 00 0 0949 20 83 0 0639 5 00 0 0951 13 17 0 0948 21 00 0 0639 5 17 0 0998 13 33 0 0948 21.17 0 0639 5 33 0 1051 13 50 0 0948 21 33 0 0639 5 50 0.1067 13.67 0 0926 21 50 0 0639 5 67 0 1114 13 83 0 0901 21 67 0 0639 5 83 0 1167 14.00 0 0898 21 83 0 0640 6 00 0.1182 14 17 0 0897 22 00 0 0640 6 17 0 1269 14 33 0 0897 22 17 0 0617 6 33 0 1368 14 50 0 0898 22 33 0 0592 6 50 0.1393 14 67 0 0875 22 50 0 0588 6 67 0 1524 14 83 0 0850 22 67 0 0587 6 83 0 1672 15 00 0 0847 22 83 0 0587 7 00 0 1706 15 17 0 0846 23 00 0 0587 7 17 0 1863 15 33 0 0846 23 17 0 0587 7.33 0.2039 15 50 0 0846 23 33 0 0587 7 50 0 2077 15 67 0 0824 23 50 0 0587 7 67 0 3626 15 83 0 0799 23 67 0 0587 7 83 0 5414 16 00 0 0795 23 83 0 0587 8 00 0.5759 16 17 0 0794 24 00 0 0587 8 17 0 4570 16 33 0 0795 24 17 0 0334 8.33 0 3127 16 50 0 0795 24 33 0 0061 8 50 0 2903 16 67 0 0795 24 50 0 0012 8 67 0 2516 16 83 0 0795 24 67 0 0002 Hydrograph ID: BASIN N - 100 yr Area: 0 6781 ac Hyd Int• 10.00 min Base Flow: Peak Flow. 0.5759 cfs Peak Time 8 00 hrs Hyd Vol. 0 2014 acft MOVEHYD [BASIN NJ TO [BASIN N - 6 mo] AS [6 mo] Peak Flow 0.1595 cfs Peak Time: 8.00 hrs Hyd Vol• 2376.28 cf - 0 0546 acft MOVEHYD (BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow 0 5759 cfs Peak Time 8.00 hrs Hyd Vol: 8771.93 cf - 0.2014 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 327 0000 ft 332.7000 ft 0.10 Infll: 10 00 in/hr Multiplier: 1.00 Reach ID: BIO SWALE N Section Properties: Shape. Ditch Routing Method: Travel Time Translation Size Material Mannings n Hyd params By Corr Metal -normal 0.0250 Mannings Formula Length Slope Entrance Loss 125.0000 ft 1 00 Width Bank Hgt ss1 ss2 8.0000 ft 3.0000 ft 3.OOh.1 v 3.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY N 0.0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3.0000 ft 0 5000 ft 2 0000 ft 0 0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.000OIn/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.6781 ac 0.4283 cf 0 4283 cf 1.4197 ft/s 0 1331 ft Ent Loss Exit Loss Fnct Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN N - 6 mo] THRU [BIO SWALE N] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 1595 ---- 1 00 0 0920 Ditch 0 5914 ----- BASIN N ROUTEHYD [BASIN N - 100 yr] THRU [BIO SWALE N] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 5759 ---- 1 00 0 2331 Ditch 0 9419 ----- BASIN N Node ID: INFILTRATION N Desc: Manhole structure Start EI: 332 7000 ft Max EI: 333.7000 ft Contrib Basin. Contnb Hyd Length Width Void Ratio 125.0000 ft 8 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN N RLP Desc: Manhole structure Start EI: 332 7000 ft Max EI: 333 7000 ft Contnb Basin: Contrib Hyd~ Storage Id: INFILTRATION N Discharge Id INFILTRATION RLPCOMPUTE [BASIN N RLP] SUMMARY 100 yr MatchQ=PeakQ= 0.4283 cfs Peak Out Q' 0.1042 cfs -Peak Stg: 333 87 ft - Active Vol 954.46 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 ` PROJECT REPORT Project Name: Tahoma Terra_BAS1N -N Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin N Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 DEVELOPED LAND USE Basin Basin N Flows To Bio-Infiltration Swale N Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale N Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. r~,...~,.,~,....~ Depth: aft. Bottom Length: 125ft. Bottom Width 8ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.014 acre-ft. Pond Hydraula.c Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.2 0.023 0.000 0.000 0.000 332.3 0.029 0.002 0.000 0.231 332.4 0.026 0.004 0.000 0.231 332.4 0.027 0.006 0.000 0.231 332.5 0.029 0.008 0.000 0.231 J~`~ ~~ <~~~ OgEFH Dq I ~pF WASH) ~O • q~ '! co 4 _ z C' j.J 5~5 `' K AC Fogs i t~~; `~' ~ IXPIRES• 11-22- 332.6 0.030 0.010 0.000 0.231 332.7 0.032 0.013 0.000 0.231 332.7 0.033 0.015 0.411 0.231 332.8 0.035 0.018 1.873 0.231 332.9 0.036 0.021 3.920 0.231 333.0 0.038 0.024 6.416 0.231 333.1 0.039 0.027 9.292 0.231 333.1 0.041 0.030 12.50 0.231 333.2 0.042 0.033 16.01 0.231 333.3 0.044 0.036 19.81 0.231 333.4 0.045 0.040 23.86 0.231 333.4 0.047 0.043 28.15 0.231 333.5 0.049 0.097 32.67 0.231 333.6 0.050 0.051 37.42 0.231 333.7 0.052 0.055 42.37 0.231 333.8 0.053 0.059 47.53 0.231 333.8 0.055 0.063 52.88 0.231 333.9 0.057 0.067 58.41 0.231 334.0 0.058 0.072 64.13 0.231 334.1 0.060 0.077 70.02 0.231 334.1 0.062 0.081 76.08 0.231 334.2 0.063 0.086 82.31 0.231 334.3 0.065 0.091 88.70 0.231 334.4 0.067 0.096 95.24 0.231 334.5 0.068 0.102 101.9 0.231 334.5 0.070 0.107 108.8 0.231 334.6 0.072 0.112 115.8 0.231 334.7 0.074 0.118 122.9 0.231 334.8 0.075 0.129 130.2 0.231 334.8 0.077 0.130 137.6 0.231 334.9 0.079 0.136 145.2 0.231 335.0 0.081 0.192 152.9 0.231 335.1 0.083 0.198 160.7 0.231 335.2 0.089 0.155 168.6 0.231 335.2 0.086 0.162 176.7 0.231 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Pera.od 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Flow(cfs) Predeveloped 0.134573 0.163287 0.181047 0.202451 0.217801 0.232792 Periods for Developed Unmitigated Flow (cfs) 0.134573 0.163287 0.181047 0.202451 0.217801 0.232742 Periods for Developed Ma.tigated Flow(cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.129 0.000 1957 0.206 0.000 ]958 0.118 0.000 1959 0.139 0.000 1960 0.153 0.000 1961 0.100 0.000 1962 0.110 0.000 1963 0.213 0.000 1969 0.160 0.000 1965 0.148 0.000 1966 0.105 0.000 1967 0.125 0.000 1968 0.101 0.000 1969 0.100 0.000 1970 0.100 0.000 1971 0.124 0.000 1972 0.140 0.000 1973 0.117 0.000 1974 0.137 0.000 1975 0.118 0.000 1976 0.136 0.000 1977 0.172 0.000 1978 0.147 0.000 1979 0.174 0.000 1980 0.131 0.000 1981 0.199 0.000 1982 0.173 0.000 1983 0.185 0.000 1984 0.112 0.000 1985 0.131 0.000 1986 0.149 0.000 1987 0.150 0.000 1988 0.087 0.000 1989 0.104 0.000 1990 0.203 0.000 1991 0.195 0.000 1992 0.127 0.000 1993 0.093 0.000 1994 0.104 0.000 1995 0.150 0.000 1996 0.152 0.000 1997 0.123 0.000 1998 0.172 0.000 1999 0.148 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2058 0.0000 2 0.2028 0.0000 3 0.1948 0.0000 4 0.1851 0.0000 5 0.1744 0.0000 6 0.1729 0.0000 7 0.1729 0.0000 8 0.1718 0.0000 9 0.1597 0.0000 10 0.1526 0.0000 11 0.1522 0.0000 12 0.1500 0.0000 13 0.1496 0.0000 14 0.1489 0.0000 15 0.1480 0.0000 16 0.1476 0.0000 17 0.1465 0.0000 18 0.1437 0.0000 19 0.1397 0.0000 20 0.1387 0.0000 0.1366 0.0000 0.1355 0.0000 0.1308 0.0000 0.1306 0.0000 0.1272 0.0000 0.1252 0.0000 0.1243 0.0000 0.1235 0.0000 0.1227 0.0000 0.1183 0.0000 0.1182 0.0000 0.1173 0.0000 0.1125 0.0000 0.1096 0.0000 0.1055 0.0000 0.1036 0.0000 0.1036 0.0000 0.1007 0.0000 0.1001 0.0000 0.0999 0.0000 0.0997 0.0000 0.0932 0.0000 0.0866 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0673 1057 0 .0 Pass 0.0688 991 0 .0 Pass 0.0703 929 0 .0 Pass 0.0718 853 0 .0 Pass 0.0734 796 0 .0 Pass 0.0749 723 0 .0 Pass 0.0764 676 0 .0 Pass 0.0779 632 0 .0 Pass 0.0794 591 0 .0 Pass 0.0810 547 0 .0 Pass 0.0825 508 0 .0 Pass 0.0840 473 0 .0 Pass 0.0855 443 0 .0 Pass 0.0871 410 0 .0 Pass 0.0886 373 0 .0 Pass 0.0901 344 0 .0 Pass 0.0916 318 0 .0 Pass 0.0931 305 0 .0 Pass 0.0947 288 0 .0 Pass 0.0962 262 0 .0 Pass 0.0977 242 0 .0 Pass 0.0992 226 0 .0 Pass 0.1007 209 0 .0 Pass 0.1023 193 0 .0 Pass 0.1038 184 0 .0 Pass 0.1053 172 0 .0 Pass 0.1068 165 0 .0 Pass 0.1083 159 0 .0 Pass 0.1099 151 0 .0 Pass 0.1114 143 0 .0 Pass 0.1129 191 0 .0 Pass 0.1144 136 0 .0 Pass 0.1159 131 0 .0 Pass 0.1175 117 0 .0 Pass 0.1190 112 0 .0 Pass 0.1205 106 0 .0 Pass 0.1220 99 0 .0 Pass 0.1235 92 0 .0 Pass 0.1251 86 0 .0 Pass 0.1266 80 0 .0 Pass 0.1281 75 0 .0 Pass 0.1296 70 0 .0 Pass 0.1311 66 0 .0 Pass 0.1327 65 0 .0 Pass 0.1342 60 0 .0 Pass 0.1357 54 0 .0 Pass 0.1372 51 0 .0 Pass 0.1387 49 0 .0 Pass 0.1403 43 0 .0 Pass 0.1418 43 0 .0 Pass 0.1433 39 0 .0 Pass 0.1498 36 0 .0 Pass 0.1963 36 0 .0 Pass 0.1479 32 0 .0 Pass 0.1494 27 0 .0 Pass 0.1509 24 0 .0 Pass 0.1524 23 0 .0 Pass 0.1539 21 0 .0 Pass 0.1555 20 0 .0 Pass 0.1570 19 0 .0 Pass 0.1585 17 0 .0 Pass 0.1600 16 0 .0 Pass 0.1615 16 0 .0 Pass 0.1631 16 0 .0 Pass 0.1646 15 0 .0 Pass 0.1661 15 0 .0 Pass 0.1676 13 0 .0 Pass 0.1691 12 0 .0 Pass 0.1707 12 0 .0 Pass 0.1722 11 0 .0 Pass 0.1737 9 0 .0 Pass 0.1752 7 0 .0 Pass 0.1768 7 0 .0 Pass 0.1783 7 0 .0 Pass 0.1798 7 0 .0 Pass 0.1813 6 0 .0 Pass 0.1828 6 0 .0 Pass 0.1844 6 0 .0 Pass 0.1859 5 0 .0 Pass 0.1874 5 0 .0 Pass 0.1889 5 0 .0 Pass 0.1904 5 0 .0 Pass 0.1920 5 0 .0 Pass 0.1935 5 0 .0 Pass 0.1950 4 0 .0 Pass 0.1965 4 0 .0 Pass 0.1980 4 0 .0 Pass 0.1996 4 0 .0 Pass 0.2011 9 0 .0 Pass 0.2026 9 0 .0 Pass 0.2041 3 0 .0 Pass 0.2056 2 0 .0 Pass 0.2072 1 0 .0 Pass 0.2087 1 0 .0 Pass 0.2102 1 0 .0 Pass 0.2117 1 0 .0 Pass 0.2132 1 0 .0 Pass 0.2148 0 0 .0 Pass 0.2163 0 0 .0 Pass 0.2178 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.07 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.04 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. i~.Nt ' FLOW (Ns) lU0` 2327 -'- 1Q0 kkk7kkkkkkkkS904K{d9600f10fkkkkkkkk?skkk}~ 50 ' 2178 ~-- - 3 ~ 3 25 2025 ~ t 3 ~ , 3 ~ , ~, _ ~ ~ 10 ` 1810 ~ 1.0 ,..,. 5 1633 -- ~ ~----~-~ ~ y ' 1 ~ z.. ~g3~01~Riop@d 2 1346 ; ; ' ~ ,~ 10E-1 ooaoobnc'c~ x evelepe MiCigated ' V ~~ ~ ~ { 3 ' ' ' , 10E-2 ' 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart Y{;AR ~ FIOW (c1H~ 100 .1327 0 22 - - __ ~ ~ a _ _r _ _ _ _ o Prec{?veh~l?e4 __ 50 ~ 3178 ~ ~ , ~ 3 ? x Developed wN~ facility 25 ~ .1025 , ` ~ ~, 018 ° 10 1810--- ''°~ 014 - -- w 5 1633 ~ ~' '~~ I'>~~`l`' '~ Q~, J~ ~ 010 ~_... _ _-~_ _ ~ ~, ~ .._~_ ` + l~~ ' ~ 1 Gi 2 1346 ~'- - °-~~ CA ~ ~--~~~,; , ~~ ~ a o7 ~ ___ . . _ _ _ - _ . __ _ . ~ _. ,. ~, .~ ~'~ 10E-5 10E•d 10E•3 10E•2 10E 1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph i'FAR FLOW (r1s) 100 1138 ` ' ~l"~ 50 i% I ~ .7 701 ~ ~ 3 ~ ~ 25 i v ' z 4 `: i 5 045 --~--- _--~-~ ' ' ~ ~ ~~~ S~ 1'~ lj 10 26$1 .~....... _~~ ~~ ",; X31 r s3~i ~ ~ 3~~ 5 r 1518 ,'; >' 2 .5459 ~~ I~( ~ t 'early Peaks for Developed W/Pond CLEARHIS BASIN N Event Summary: BasmlD Peak Q Peak T Event ------- (cfs) (hrs) BASIN N 0 16 8 00 BASIN N 0 27 8 00 BASIN N 0 42 8 00 BASIN N 0 50 8 00 BASIN N 0 54 8 00 BASIN N 0 58 8 00 yr Drainage Area: BASIN N Hyd Method• SBUH Hyd Peak Factor. 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0727 ac 78.00 Impervious 0.6054 ac 98.00 Total 0.6781 ac Supporting Data: Pervious CN Data: Type B SoOs 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type: Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Peak Vol Area Method Raintype (ac-ft) ar. /Loss 0 0546 0 68 SBUH/SCS TYPEIA 6 mo 0 0924 0 68 SBUH/SCS TYPEIA 2 yr 0 1465 0 68 SBUH/SCS TYPEIA 10 yr 0 1739 0 68 SBUH/SCS TYPEIA 25 yr 0 1876 0 68 SBUH/SCS TYPEIA 50 yr 0 2014 0 68 SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs: 0.20 Intv: 10 00 min TC 0.03 hrs 0.12 hrs 0.0727 ac 0.4280 ac 0 1774 ac Length• Slope: Coeff Travel Time 6.00 ft 2 00% 0 2400 1 90 min Length• Slope: Coeff: Travel Time 370 00 ft 0 50% 27.0000 4 29 min 27.00 ft 2.00% 0.0110 0.54 min 215 00 ft 0 50% 21.0000 2 41 min 5.00 ft 2 00% 0 0110 0.14 min MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow. 0.1595 cfs Peak Time• 8 00 hrs Hyd Vol: 2376.28 cf - 0.0546 acft MOVEHYD [BASIN N] TO [BASIN N - 2 yr] AS [2 yr] Peak Flow: 0.2680 cfs Peak Time• 8 00 hrs Hyd Vol. 4026.78 cf - 0 0924 acft MOVEHYD (BASIN N] TO [BASIN N - 10 yr] AS [10 yr] Peak Flow 0.4214 cfs Peak Time 8 00 hrs Hyd Vol 6381 20 cf - 0.1465 acft MOVEHYD [BASIN N] TO [BASIN N - 25 yr] AS [25 yr] Peak Flow: 0 4985 cfs Peak Time 8 00 hrs Hyd Vol 7573 61 cf - 0.1739 acft MOVEHYD [BASIN N] TO [BASIN N - 50 yr] AS [50 yr] Peak Flow: 0.5372 cfs Peak Time 8 00 hrs Hyd Vol 8172.06 cf - 0 1876 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow: 0 5759 cfs Peak Time: 8.00 hrs Hyd Vo- 8771.93 cf - 0.2014 acft Hydrograph ID: BASIN N - 100 yr Area: 0.6781 ac Hyd Int: 10.00 min Base Flow: Peak Flow. 0.5759 cfs Peak Time. 8 00 hrs Hyd Vol 0 2014 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0016 8 83 0 2148 16 67 0 0795 0 83 0 0064 9 00 0 2088 16 83 0 0795 1 00 0 0128 9 17 0 1855 17 00 0 0795 1.17 0 0201 9 33 0 1609 17.17 0 0773 1 33 0 0274 9 50 0 1571 17 33 0 0748 1 50 0 0328 9 67 0 1495 17 50 0 0744 1 67 0 0383 9 83 0 1421 17 67 0 0743 1 83 0 0434 10 00 0 1410 17 83 0 0743 2 00 0 0470 10 17 0 1341 18 00 0 0743 2 17 0.0513 10 33 0 1268 18 17 0 0721 2 33 0.0555 10 50 0 1257 18 33 0 0696 2 50 0 0581 10 67 0 1210 18 50 0 0692 2 67 0 0601 10 83 0 1161 18 67 0 0691 2 83 0 0618 11 00 0 1153 18 83 0 0691 3.00 0 0633 11 17 0 1130 19 00 0.0691 3 17 0 0645 11 33 0 1105 19 17 0 0668 3 33 0 0657 11 50 0.1102 19 33 0 0643 3 50 0 0666 11 67 0 1079 19 50 0 0639 3 67 0.0692 11 83 0 1054 19 67 0 0638 3 83 0 0721 12 00 0 1051 19 83 0 0638 4 00 0 0733 12 17 0 1028 20 00 0 0638 4.17 0 0776 12 33 0 1003 20 17 0 0639 4 33 0 0825 12 50 0 1000 20 33 0 0639 4 50 0.0840 12 67 0 0977 20 50 0 0639 4 67 0.0884 12 83 0 0952 20 67 0 0639 4 83 0 0935 13 00 0 0949 20 83 0 0639 5 00 0 0951 13 17 0 0948 21 00 0 0639 5 17 0 0998 13 33 0 0948 21 17 0 0639 5 33 0 1051 13 50 0.0948 21 33 0 0639 5 50 0 1067 13 67 0 0926 21 50 0 0639 5 67 0 1114 13 83 0 0901 21 67 0 0639 5 83 0 1167 14 00 0 0898 21 83 0 0640 6 00 0.1182 14 17 0 0897 22 00 0 0640 6 17 0 1269 14.33 0 0897 22 17 0 0617 6 33 0 1368 14 50 0 0898 22 33 0 0592 6 50 0 1393 14 67 0 0875 22 50 0 0588 6 67 0 1524 14 83 0 0850 22.67 0 0587 6 83 0.1672 15 00 0 0847 22 83 0 0587 7 00 0 1706 15 17 0 0846 23 00 0 0587 7.17 0 1863 15 33 0 0846 23 17 0 0587 7 33 0 2039 15 50 0 0846 23 33 0 0587 7 50 0 2077 15 67 0 0824 23 50 0 0587 7 67 0 3626 15 83 0 0799 23 67 0 0587 7 83 0 5414 16 00 0 0795 23 83 0 0587 8 00 0 5759 16 17 0 0794 24 00 0 0587 8 17 0 4570 16 33 0 0795 24 17 0 0334 8 33 0 3127 16 50 0 0795 24 33 0 0061 8 50 0 2903 16 67 0 0795 24 50 0 0012 8 67 0 2516 16 83 0 0795 24 67 0 0002 Hydrograph ID: BASIN N - 100 yr Area. 0 6781 ac Hyd Int. 10 00 min Base Flow Peak Flow: 0 5759 cfs Peak Time: 8 00 hrs Hyd Vol: 0.2014 acft MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow 0.1595 cfs Peak Time 8.00 hrs Hyd Vol. 2376.28 cf - 0 0546 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow: 0 5759 cfs Peak Time: 8.00 hrs Hyd Vol: 8771.93 cf - 0.2014 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 327 0000 ft 332.7000 ft 0.10 Infll: 10.00 In/hr Multiplier: 1.00 Reach ID: B10 SWALE N Section Properties: Shape. Ditch Routing Method: Travel Time Translation Size Material Mannings n Hyd params By Corr Metal -normal 0.0250 Mannings Formula Length Slope Entrance Loss 125.0000 ft 1.00 Width Bank Hgt ss1 ss2 8.0000 ft 3 0000 ft 3 OOh:1 v 3 OOh.1 v Up Node Dn Node Up Invert Dn Invert DUMMY N 0.0000 ft 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Mln Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3.0000 ft 0 5000 ft 2.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.6781 ac 0 4283 cf 0 4283 cf 1.4197 ft/s 0.1331 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN N - 6 mo] THRU [BIO SWALE N] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIO SWALE N 0 6781 0 1595 ---- 1 00 0 0920 Ditch 0 5914 ----- BASIN N ROUTEHYD [BASIN N - 100 yr] THRU [BIO SWALE N] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIO SWALE N 0 6781 0 5759 ---- 1 00 0 2331 Ditch 0 9419 ----- BASIN N Node ID: INFILTRATION N Desc: Manhole structure Start EI• 332.7000 ft Max EI: 333.7000 ft Contrib Basin• Contrib Hyd: Length Width Void Ratio 125.0000 ft 8.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN N RLP Desc: Manhole structure Start EI: 332.7000 ft Max EI: 333 7000 ft Contrib Basin: Contrib Hyd: Storage Id: INFILTRATION N Discharge Id: INFILTRATION RLPCOMPUTE [BASIN N RLP] SUMMARY 100 yr MatchQ=PeakQ= 0 4283 cfs Peak Out O 0.1042 cfs -Peak Stg: 333 87 ft - Active Vol. 954 46 cf d WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -N Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin N Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 DEVELOPED LAND USE Basin Basin N Flows To Bio-Infiltration Swale N Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.22 IMPERVIOUS: 0.54 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale N Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 125ft. Bottom Width 8ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.014 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.2 0.023 0.000 0.000 0.000 332.3 0.024 0.002 0.000 0.231 332.4 0.026 0.004 0.000 0.231 332.9 0.027 0.006 0.000 0.231 332..5 0.029 0.008 0.000 0.231 `1P~e~ ~~ U'a ~~: ~' ,~gEPH Dq~ ~oF wAS~( ISO '0 q~ ao 4 ~~ z ~` Foes i t~v ,~{' ~ //ff /yam Facv~t~FS• ~(-2 A o~ X132.6 0.030 0.010 0.000 0.231 332.7 0.032 0.013 0.000 0.7_31 332.7 0.033 0.015 0.411 0.231 332.8 0.035 0.018 1.873 0.231 332.9 0.036 0.021 3.920 0.231 333.0 0.038 0.024 6.416 0.231 333.1 0.039 0.027 9.292 0.231 333.1 0.041 0.030 12.50 0.231 333.2 0.092 0.033 16.01 0.231 333.3 0.044 0.036 19.81 0.231 333.4 0.045 0.040 23.86 0.231 333.4 0.047 0.043 28.15 0.231 333.5 0.049 0.047 32.67 0.231 333.6 0.050 0.051 37.92 0.231 333.7 0.052 0.055 42.37 0.231 333.8 0.053 0.059 97.53 0.231 333.8 0.055 0.063 52.88 0.231 333.9 0.057 0.067 58.41 0.231 334.0 0.058 0.072 64.13 0.231 339.1 0.060 0.077 70.02 0.231 334.1 0.062 0.081 76.08 0.231 334.2 0.063 0.086 82.31 0.231 334.3 0.065 0.091 88.70 0.231 334.4 0.067 0.096 95.24 0.231 334.5 0.068 0.102 101.9 0.231 334.5 0.070 0.107 108.8 0.231 334.6 0.072 0.112 115.8 0.231 334.7 0.074 0.118 122.9 0.231 334.8 0.075 0.124 130.2 0.231 334.8 0.077 0.130 137.6 0.231 334.9 0.079 0.136 145.2 0.231 335.0 0.081 0.142 152.9 0.231 335.1 0.083 0.148 160.7 0.231 335.2 0.084 0.155 168.6 0.231 335.2 0.086 0.162 176.7 0.231 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.134573 5 year 0.163287 10 year 0.181047 25 year 0.202451 50 year 0.217801 100 year 0.232742 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.134573 5 year 0.163287 10 year 0.181097 25 year 0.202451 50 year 0.217801 100 year 0.232742 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 pearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.124 0.000 1957 0.206 0.000 1958 0.118 0.000 1959 0.139 0.000 1960 0.153 0.000 1961 0.100 0.000 1962 0.110 0.000 1963 0.213 0.000 1964 0.160 0.000 1965 0.148 0.000 1966 0.105 0.000 1967 0.125 0.000 1968 0.101 0.000 1969 0.100 0.000 1970 0.100 0.000 1971 0.124 0.000 1972 0.140 0.000 1973 0.117 0.000 1974 0.137 0.000 1975 0.118 0.000 1976 0.136 0.000 1977 0.172 0.000 1978 0.147 0.000 1979 0.174 0.000 1980 0.131 0.000 1981 0.149 0.000 1982 0.173 0.000 1983 0.185 0.000 1984 0.112 0.000 1985 0.131 0.000 1986 0.144 0.000 1987 0.150 0.000 1988 0.087 0.000 1989 0.104 0.000 1990 0.203 0.000 1991 0.195 0.000 1992 0.127 0.000 1993 0.093 0.000 1994 0.104 0.000 1995 0.150 0.000 1996 0.152 0.000 1997 0.123 0.000 1998 0.172 0.000 1999 0.148 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2058 0.0000 2 0.2028 0.0000 3 0.1948 0.0000 4 0.1851 0.0000 5 0.1744 0.0000 6 0.1729 0.0000 7 0.1729 0.0000 8 0.1718 0.0000 9 0.1597 0.0000 10 0.1526 0.0000 11 0.1522 0.0000 12 0.1500 0.0000 13 0.1496 0.0000 14 0.1489 0.0000 15 0.1480 0.0000 16 0.1476 0.0000 17 0.1465 0.0000 18 0.1437 0.0000 19 0.1397 0.0000 20 0.1387 0.0000 0.1366 0.0000 0.1355 0.0000 0.1308 0.0000 0.1306 0.0000 0.1272 0.0000 0.1252 0.0000 0.1243 0.0000 0.1235 0.0000 0.1227 0.0000 0.1183 0.0000 0.1182 0.0000 0.1173 0.0000 0.1125 0.0000 0.1096 0.0000 0.1055 0.0000 0.1036 0.0000 0.1036 0.0000 0.1007 0.0000 0.1001 0.0000 0.0999 0.0000 0.0997 0.0000 0.0932 0.0000 0.0866 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0673 1057 0 .0 Pass 0.0688 991 0 .0 Pass 0.0703 924 0 .0 Pass 0.0718 853 0 .0 Pass 0.0734 796 0 .0 Pass 0.0749 723 0 .0 Pass 0.0764 676 0 .0 Pass 0.0779 632 0 .0 Pass 0.0794 591 0 .0 Pass 0.0810 547 0 .0 Pass 0.0825 508 0 .0 Pass 0.0840 473 0 .0 Pass 0.0855 443 0 .0 Pass 0.0871 410 0 .0 Pass 0.0886 373 0 .0 Pass 0.0901 344 0 .0 Pass 0.0916 318 0 .0 Pass 0.0931 305 0 .0 Pass 0.0947 288 0 .0 Pass 0.0962 262 0 .0 Pass 0.0977 242 0 .0 Pass 0.0992 226 0 .0 Pass 0.1007 209 0 .0 Pass 0.1023 193 0 .0 Pass 0.1038 184 0 .0 Pass 0.1053 172 0 .0 Pass 0.1068 165 0 .0 Pass 0.1083 159 0 .0 Pass 0.1099 151 0 .0 Pass 0.1119 143 0 .0 Pass 0.1129 141 0 .0 Pass 0.1199 136 0 .0 Pass 0.1159 131 0 .0 Pass 0.1175 117 0 .0 Pass 0.1190 112 0 .0 Pass 0.1205 106 0 .0 Pass 0.1220 99 0 .0 Pass 0.1235 92 0 .0 Pass 0.1251 86 0 .0 Pass 0.1266 80 0 .0 Pass 0.1281 75 0 .0 Pass 0.1296 70 0 .0 Pass 0.1311 66 0 .0 Pass 0.1327 65 0 .0 Pass 0.1342 60 0 .0 Pass 0.1357 54 0 .0 Pass 0.1372 51 0 .0 Pass 0.1387 49 0 .0 Pass 0.1903 43 0 .0 Pass 0.1418 43 0 .0 Pass 0.1433 39 0 .0 Pass 0.1448 36 0 .0 Pass 0.1463 36 0 .0 Pass 0.1479 32 0 .0 Pass 0.1494 27 0 .0 Pass 0.1509 ?_4 0 .0 Pass 0.1524 23 0 .0 Pass 0.1539 21 0 .0 Pass 0.1555 20 0 .0 Pass 0.1570 19 0 .0 Pass 0.1585 17 0 .0 Pass 0.1600 16 0 .0 Pass 0.1615 16 0 .0 Pass 0.1631 16 0 .0 Pass 0.1646 15 0 .0 Pass 0.1661 15 0 .0 Pass 0.1676 13 0 .0 Pass 0.1691 12 0 .0 Pass 0.1707 12 0 .0 Pass 0.1722 11 0 .0 Pass 0.1737 9 0 .0 Pass 0.1752 7 0 .0 Pass 0.1768 7 0 .0 Pass 0.1783 7 0 .0 Pass 0.1798 7 0 .0 Pass 0.1813 6 0 .0 Pass 0.1828 6 0 .0 Pass 0.1894 6 0 .0 Pass 0.1859 5 0 .0 Pass 0.1879 5 0 .0 Pass 0.1889 5 0 .0 Pass 0.1904 5 0 .0 Pass 0.1920 5 0 .0 Pass 0.1935 5 0 .0 Pass 0.1950 4 0 .0 Pass 0.1965 4 0 .0 Pass 0.1980 4 0 .0 Pass 0.1996 4 0 .0 Pass 0.2011 4 0 .0 Pass 0.2026 4 0 .0 Pass 0.2041 3 0 .0 Pass 0.2056 2 0 .0 Pass 0.2072 1 0 .0 Pass 0.2087 1 0 .0 Pass 0.2102 1 0 .0 Pass 0.2117 1 0 .0 Pass 0.2132 1 0 .0 Pass 0.2148 0 0 .0 Pass 0.2163 0 0 .0 Pass 0.2178 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.07 acre-feet On-line facility target flow: 0.07 cfs. Adjusted £or 15 min: 0.08 cfs. Off-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.09 cfs. program and accompanying documentation as provaded 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warrantees of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even tf AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~~~~, p,+~4tlO't~loped QgO64~~ '(jeveloped kiitigated Yearly Peaks for Predeveloped Flow Frequency Chart PEAR ~ FLOW (tts) 100 ~ 1327 0 22 - __ _ _ ___ ~ ~_~~ Pr~~l~uehyrs~t ____ 50 2178 ~ ; : , ~ ' ~~~ ~ x beveloped ~udh Facd~y 25 1025 ~ ~ 018 _ ... . _ n ~ . . ~, 10 1810 ~-- ~ N 014 --_ _ .. ._ _~ _ .._ 5 1633 -°---~- ~ ~ 't ~ ~ ~ ~C3 ~~ '~ I ~~, ~ Ot0 .. ___ _._ ~~ _ __. _ I , ~ 2 ,~~ .-- ~~-~ ~ 007 --~E ,~ _ . ~. _ ___ __ ~ ~ __ _ ~~_: ~ ~ <<~~~~ ~ ; ~ F 10E-5 ~ 10E•4 10E•3 10E~2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR FLOW() 100 11 38 ;i, 1~ ]~' ,~~ _ SO ~T701 '~~ ~ ;~~~ 2, i t .: >i3 (`' 3 2S `3045 ... W.. .~~ jj ~, 3 r ~ ~ ~ r10 " 2681 _..._.,.. «._.. ,..: ; ; ' i J 1 518 t~ ~ ~ ' , 2 5459 ~ ~ ' ~ °--~ 'early Peaks for Developed W/Pond /~ CLEARHIS BASIN N Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BASIN N 0 16 8 00 BASIN N 0 27 8 00 BASIN N 0 42 8 00 BASIN N 0 50 8 00 BASIN N 0 54 8 00 BASIN N 0 58 8 00 yr Drainage Area: BASIN N Hyd Method SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0 0727 ac 78.00 Impervious 0 6054 ac 98.00 Total 0.6781 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Pervious TC Data: Flow type: Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0546 0 68 SBUH/SCS TYPEIA 6 mo 0 0924 0 68 SBUH/SCS TYPE1A 2 yr 0 1465 0 68 SBUH/SCS TYPE1A 10 yr 0 1739 0 68 SBUH/SCS TYPEIA 25 yr 0 1876 0 68 SBUH/SCS TYPE1A 50 yr 0 2014 0 68 SBUHlSCS TYPEIA 100 Loss Method SCS CN Number SCS Abs• 0.20 Intv: 10 00 mm TC 0.03 hrs 0.12 hrs 0 0727 ac 0 4280 ac 0 1774 ac Length• Slope: Coeff: Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length: Slope: Coeff• Travel Time 370.00 ft 0.50% 27.0000 4.29 min 27.00 ft 2.00% 0.0110 0.54 min 215 00 ft 0 50% 21.0000 2 41 min 5 00 ft 2.00% 0.0110 0.14 min MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow 0.1595 cfs Peak Tlme: 8 00 hrs Hyd Vol• 2376.28 cf - 0.0546 acft MOVEHYD [BASIN N] TO [BASIN N - 2 yr] AS [2 yr] Peak Flow: 0.2680 cfs Peak Time: 8 00 hrs Hyd Vol. 4026.78 cf - 0.0924 acft MOVEHYD [BASIN N] TO [BASIN N - 10 yr] AS [10 yr] Peak Flow: 0 4214 cfs Peak Time 8 00 hrs Hyd Vol. 6381 20 cf - 0.1465 acft MOVEHYD [BASIN N] TO [BASIN N - 25 yr] AS [25 yr] Peak Flow. 0 4985 cfs Peak Time: 8.00 hrs Hyd Vol• 7573.61 cf - 0.1739 acft MOVEHYD [BASIN N] TO [BASIN N - 50 yr] AS [50 yr] Peak Flow: 0 5372 cfs Peak Time 8 00 hrs Hyd Vol 8172 06 cf - 0.1876 acft MOVEHYD (BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow: 0.5759 cfs Peak Tlme 8 00 hrs Hyd Vol 8771.93 cf - 0 2014 acft Hydrograph ID: BASIN N - 100 yr Area. 0.6781 ac Hyd Int: 10.00 mm Base Flow. Peak Flow: 0 5759 cfs Peak Time• 8 00 hrs Hyd Vol: 0.2014 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0016 8 83 0 2148 16 67 0 0795 0 83 0 0064 9 00 0 2088 16 83 0.0795 1 00 0 0128 9 17 0 1855 17 00 0 0795 1 17 0 0201 9 33 0 1609 17 17 0 0773 1 33 0.0274 9 50 0 1571 17 33 0 0748 1 50 0.0328 9 67 0 1495 17 50 0 0744 1 67 0 0383 9 83 0 1421 17 67 0 0743 1 83 0.0434 10 00 0 1410 17 83 0 0743 2 00 0 0470 10 17 0 1341 18 00 0 0743 2 17 0 0513 10 33 0 1268 18 17 0 0721 2 33 0 0555 10 50 0 1257 18 33 0 0696 2 50 0 0581 10.67 0 1210 18 50 0 0692 2 67 0 0601 10 83 0 1161 18 67 0 0691 2 83 0 0618 11 00 0 1153 18 83 0 0691 3 00 0 0633 11 17 0 1130 19 00 0 0691 3 17 0 0645 11 33 0 1105 19 17 0 0668 3 33 0 0657 11 50 0 1102 19 33 0 0643 3 50 0 0666 11 67 0 1079 19 50 0 0639 3 67 0 0692 11 83 0 1054 19 67 0 0638 3 83 0 0721 12 00 0 1051 19 83 0 0638 4 00 0 0733 12 17 0 1028 20 00 0 0638 4 17 0 0776 12 33 0 1003 20 17 0 0639 4 33 0 0825 12 50 0 1000 20 33 0 0639 4 50 0 0840 12 67 0 0977 20 50 0 0639 4 67 0 0884 12 83 0 0952 20 67 0 0639 4 83 0 0935 13 00 0 0949 20 83 0 0639 5 00 0 0951 13 17 0 0948 21 00 0 0639 5 17 0 0998 13 33 0 0948 21 17 0 0639 5 33 0 1051 13 50 0 0948 21 33 0 0639 5 50 0 1067 13 67 0 0926 21 50 0 0639 5 67 0 1114 13 83 0 0901 21 67 0 0639 5 83 0 1167 14 00 0 0898 21 83 0 0640 6 00 0 1182 14 17 0 0897 22 00 0 0640 6 17 0 1269 14 33 0 0897 22 17 0 0617 6 33 0 1368 14 50 0 0898 22 33 0 0592 6 50 0 1393 14 67 0 0875 22 50 0 0588 6 67 0 1524 14 83 0 0850 22 67 0 0587 6 83 0 1672 15 00 0 0847 22 83 0 0587 7 00 0 1706 15 17 0 0846 23 00 0 0587 7 17 0.1863 15 33 0 0846 23 17 0 0587 7 33 0.2039 15 50 0 0846 23 33 0 0587 7 50 0 2077 15 67 0 0824 23 50 0 0587 7 67 0 3626 15 83 0 0799 23 67 0 0587 7 83 0.5414 16 00 0 0795 23 83 0 0587 8 00 0 5759 16 17 0 0794 24 00 0 0587 8 17 0 4570 16 33 0 0795 24 17 0 0334 8 33 0 3127 16 50 0 0795 24 33 0 0061 8 50 0 2903 16 67 0 0795 24 50 0 0012 8 67 0 2516 16 83 0 0795 24 67 0 0002 Hydrograp h ID: BASIN N - 100 yr Area: 0.6781 ac Hyd Int: 10 00 min Base Flow• Peak Flow: 0 5759 cfs Peak Time: 8 00 hrs Hyd Vol: 0.2014 acft MOVEHYD [BASIN N] TO [BASIN N - 6 mo] AS [6 mo] Peak Flow. 0.1595 cfs Peak Time 8.00 hrs Hyd Vol 2376.28 cf - 0 0546 acft MOVEHYD [BASIN N] TO [BASIN N - 100 yr] AS [100 yr] Peak Flow 0.5759 cfs Peak Time: 8 00 hrs Hyd Vol 8771 93 cf - 0 2014 acft a Control Structure ID: INFILTRATION -Infiltration control structure Descrip. Multiple Orifice Start EI Max EI Increment 327 0000 ft 332.7000 ft 0.10 Infil: 10 00 in/hr Multiplier. 1.00 Reach ID: BIO SWALE N Section Properties: Shape. Ditch Routing Method. Travel Time Translation Size Material Mannings n Hyd params By Corr Metal -normal 0.0250 Mannings Formula Length Slope Entrance Loss 125.0000 ft 1.00 Width Bank Hgt ss1 ss2 8.0000 ft 3.0000 ft 3 OOh•1v 3 OOh 1v Up Node Dn Node Up Invert Dn Invert DUMMY N 0 0000 ft 0 0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0 5000 ft 1 0000 ft 3.0000 ft 0.5000 ft 2.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.00001n/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.6781 ac 0.4283 cf 0 4283 cf 1 4197 ft/s 0.1331 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0 000000 ft 0.0000 ft ROUTEHYD [BASIN N - 6 mo] THRU [BIO SWALE N] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Fufl nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 1595 ---- 1 00 0 0920 Ditch 0 5914 ----- BASIN N ROUTEHYD [BASIN N - 100 yr] THRU [BIO SWALE N] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIO SWALE N 0 6781 0 5759 ---- 1 00 0 2331 Ditch 0 9419 ----- BASIN N Node ID: INFILTRATION N Desc: Manhole structure Start EI 332.7000 ft Max EI 333 7000 ft Contrib Basin• Contrib Hyd. Length Width Void Ratio 125 0000 ft 8 0000 ft 39 00 Bottom area only with Infiltration 6 Node ID: BASIN N RLP Desc: Manhole structure Start EI: 332 7000 ft Max EI: 333.7000 ft Contnb Basin: Contrib Hyd. Storage Id: INFILTRATION N Discharge Id INFILTRATION RLPCOMPUTE [BASIN N RLP] SUMMARY 100 yr MatchO=PeakO= 0 4283 cfs Peak Out Q. 0 1042 cfs -Peak Stg 333.87 ft - Active Vol: 954.46 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -M Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin M Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 DEVELOPED LAND USE Basin Basin M Flows To Bio-Infiltration Swale M Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale M Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap as not activated. n; ,.,~.. ~ ~ ..., Depth: aft. Bottom Length: 140ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.019 acre-fl. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(efs) 328.0 0.032 0.000 0.000 0.000 328.1 0.034 0.003 0.000 0.324 328.2 0.035 0.005 0.000 0.324 328.2 0.037 0.008 0.000 0.324 328.3 0.039 0.011 0.000 0.324 ~~~~i~' <~~~, ,~gEPH Dq~~ r eoF wasK,t ~ 'Y,~ _ ~ (7 FCtSTE~~' ~ ,b ~! 'O",; ;~~~'' 09-2-05 ~~ IXPIRES: 11-22- 328.4 0.040 0.014 0.000 0.324 328.5 0.042 0.017 0.000 0.324 328.5 0.044 0.021 0.411 0.324 328.6 0.095 0.024 1.8'13 0.329 328.7 0.047 0.028 3.920 0.329 328.8 0.049 0.031 6.416 0.324 328.9 0.050 0.035 9.292 0.324 328.9 0.052 0.039 12.50 0.324 329.0 0.059 0.043 16.01 0.324 329.1 0.056 0.048 19.81 0.324 329.2 0.057 0.052 23.86 0.324 329.2 0.059 0.057 28.15 0.324 329.3 0.061 0.061 32.67 0.32_4 329.4 0.063 0.066 37.92 0.329 329.5 0.064 0.071 42.37 0.329 329.6 0.066 0.076 47.53 0.324 329.6 0.068 0.081 52.88 0.324 329.7 0.070 0.087 58.41 0.324 329.8 0.072 0.092 69.13 0.329 329.9 0.074 0.098 70.02 0.329 329.9 0.075 0.104 76.08 0.329 330.0 0.077 0.110 82.31 0.329 330.1 0.079 0.116 88.70 0.324 330.2 0.081 0.122 95.24 0.32_9 330.3 0.083 0.128 101.9 0.324 330.3 0.085 0.135 108.8 0.324 330.4 0.087 0.141 115.8 0.324 330.5 0.089 0.148 122.9 0.324 330.6 0.091 0.155 130.2 0.324 330.6 0.093 0.162 137.6 0.324 330.7 0.095 0.170 145.2 0.324 330.8 0.096 0.177 152.9 0.324 330.9 0.098 0.185 160.7 0.3?_4 331.0 0.100 0.192 168.6 0.324 331.0 0.102 0.200 176.7 0.32_4 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Pera.od Flow (efs) 2 year 0.292853 5 year 0.357773 10 year 0.398136 25 year 0.446964 50 year 0.982097 100 year 0.516377 Flow Frequency Return Periods for Developed Unma.ta.gated Return Period Flow(cfs) 2 year 0.292853 5 year 0.357773 10 year 0.398136 25 year 0.446964 50 year 0.982097 100 year 0.516377 Flow Frequency Return Pera.ods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.281 0.000 1957 0.447 0.093 1958 0.256 0.000 1959 0.298 0.000 1960 0.328 0.000 1961 0.221 0.000 1962 0.235 0.000 1963 0.484 0.051 1964 0.343 0.000 1965 0.325 0.000 1966 0.227 0.000 1967 0.283 0.000 1968 0.218 0.000 1969 0.215 0.000 1970 0.214 0.000 1971 0.267 0.000 1972 0.332 0.000 1973 0.252 0.000 1974 0.293 0.000 1975 0.254 0.000 1976 0.294 0.000 1977 0.371 0.000 1978 0.315 0.000 1979 0.375 0.000 1980 0.281 0.000 1981 0.323 0.000 1982 0.371 0.000 1983 0.398 0.023 1984 0.243 0.000 1985 0.281 0.000 1986 0.315 0.000 1987 0.346 0.000 1988 0.186 0.000 1989 0.223 0.000 1990 0.440 0.057 1991 0.963 0.061 1992 0.273 0.000 1993 0.200 0.000 1994 0.223 0.000 1995 0.322 0.000 1996 0.327 0.000 1997 0.264 0.000 1998 0.369 0.000 1999 0.317 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.9635 0.0608 2 0.4467 0.0567 3 0.4401 0.0511 4 0.3977 0.0233 5 0.3747 0.0000 6 0.3715 0.0000 7 0.3705 0.0000 8 0.3692 0.0000 9 0.3459 0.0000 10 0.3430 0.0000 11 0.3318 0.0000 12 0.3280 0.0000 13 0.3271 0.0000 14 0.3252 0.0000 15 0.3227 0.0000 16 0.3223 0.0000 17 0.3171 0.0000 18 0.3152 0.0000 19 0.3148 0.0000 20 0.2980 0.0000 0.2941 0.0000 0.2935 0.0000 0.2829 0.0000 0.2811 0.0000 0.2810 0.0000 0.2806 0.0000 0.2733 0.0000 0.2669 0.0000 0.2635 0.0000 0.2560 0.0000 0.2592 0.0000 0.2520 0.0000 0.2434 0.0000 0.2359 0.0000 0.2266 0.0000 0.2225 0.0000 0.2225 0.0000 0.2210 0.0000 0.2178 0.0000 0.2146 0.0000 0.2143 0.0000 0.2003 0.0000 0.1860 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1464 1041 0 .0 Pass 0.1498 977 0 .0 Pass 0.1532 893 0 .0 Pass 0.1566 831 0 .0 Pass 0.1600 783 0 .0 Pass 0.1634 716 0 .0 Pass 0.1668 667 0 .0 Pass 0.1702 613 0 .0 Pass 0.1736 573 0 .0 Pass 0.1769 535 0 .0 Pass 0.1803 489 0 .0 Pass 0.1837 457 0 .0 Pass 0.1871 419 0 .0 Pass 0.1905 384 0 .0 Pass 0.1939 356 0 .0 Pass 0.1973 330 0 .0 Pass 0.2007 313 0 .0 Pass 0.2041 291 0 .0 Pass 0.2075 266 0 .0 Pass 0.2108 253 0 .0 Pass 0.2142 235 0 .0 Pass 0.2176 215 0 .0 Pass 0.2210 193 0 .0 Pass 0.2244 181 0 .0 Pass 0.2278 170 0 .0 Pass 0.2312 163 0 .0 Pass 0.2346 158 0 .0 Pass 0.2380 152 0 .0 Pass 0.2414 145 0 .0 Pass 0.2948 141 0 .0 Pass 0.2481 137 0 .0 Pass 0.2515 131 0 .0 Pass 0.2549 122 0 .0 Pass 0.2583 113 0 .0 Pass 0.2617 108 0 .0 Pass 0.2651 99 0 .0 Pass 0.2685 93 0 .0 Pass 0.2719 89 0 .0 Pass 0.2753 85 0 .0 Pass 0.2787 78 0 .0 Pass 0.2821 72 0 .0 Pass 0.2859 69 0 .0 Pass 0.2888 65 0 .0 Pass 0.2922 60 0 .0 Pass 0.2956 57 0 .0 Pass 0.2990 52 0 .0 Pass 0.3024 47 0 .0 Pass 0.3058 47 0 .0 Pass 0.3092 43 0 .0 Pass 0.3126 40 0 .0 Pass 0.3160 38 0 .0 Pass 0.3193 35 0 .0 Pass 0.3227 30 0 .0 Pass 0.3261 27 0 .0 Pass 0.3295 25 0 .0 Pass 0.3329 29 0 .0 Pass 0.3363 21 0 .0 Pass 0.3397 20 0 .0 Pass 0.3431 19 0 .0 Pass 0.3965 16 0 .0 Pass 0.3499 16 0 .0 Pass 0.3533 16 0 .0 Pass 0.3566 16 0 .0 Pass 0.3600 13 0 .0 Pass 0.3634 12 0 .0 Pass 0.3668 12 0 .0 Pass 0.3702 11 0 .0 Pass 0.3736 9 0 .0 Pass 0.3770 8 0 .0 Pass 0.3804 8 0 .0 Pass 0.3838 8 0 .0 Pass 0.3872 8 0 .0 Pass 0.3906 8 0 .0 Pass 0.3939 7 0 .0 Pass 0.3973 7 0 .0 Pass 0.4007 5 0 .0 Pass 0.4041 5 0 .0 Pass 0.9075 5 0 .0 Pass 0.4109 5 0 .0 Pass 0.4143 5 0 .0 Pass 0.9177 5 0 .0 Pass 0.4211 5 0 .0 Pass 0.9245 5 0 .0 Pass 0.4278 5 0 .0 Pass 0.4312 5 0 .0 Pass 0.4396 5 0 .0 Pass 0.9380 5 0 .0 Pass 0.4414 4 0 .0 Pass 0.4448 4 0 .0 Pass 0.4482 2 0 .0 Pass 0.4516 2 0 .0 Pass 0.4550 2 0 .0 Pass 0.4584 2 0 .0 Pass 0.4618 2 0 .0 Pass 0.4651 1 0 .0 Pass 0.9685 1 0 .0 Pass 0.4719 1 0 .0 Pass 0.4753 1 0 .0 Pass 0.4787 1 0 .0 Pass 0.4821 1 0 .0 Pass Water Quala.ty BMP Flow and Volume. On-line facility volume: 0.015 acre-feet On-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.1 cfs. Off-line facility target flow: 0.06 cfs. Adjusted for 15 min: 0.07 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims al] warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 ~xkxxxxxrxxxx~ao~wst~za~aos~ec>axxKxxxx~ 1.0 d ,~ 10E-1 U _~ O toE-2 1 46t~440 0 44O 9oaoao4~'°'°°°a o Predeveloped x Ueueloped Mitigated xx x li I 10 20 ZO 40 50 60 70 80 90 99 Cumulative Probability____ YEAR F40~ (ds) 100: 9324 - ~ -.~....-- 0 87 ___ __ ~ Peede+~eh~ped____ _ ___ ,, 50 ; 8716 ~ 3 = ! ~ _ ~ } ~ ~NH ory ~H N _ ______~ Developed w~ Facility . ;; 25 ` .8092 ~ , ~ ; j , 0 72 _ _ _ ~ . ;~ i. 10 .7223 ;~_~'~ ~' ~ 057 -. _ ~ __.~ _~T__... 5 6504 --~ , i , ~y, ~ ~ '-' 042 - - __ .. ~ __ _ _ _ ..~.__ .___ ~' ~ € ~~ _ ~ ~; .z ;5343 ~ ~~~ ` ~ ~ ~ ~' ~ ' ~ R o2~ . -__ __ .___ ~._ . . 3 ~ ' q I ~? ~~ ~ ~ '~ 3j~ ~~~~ V_1 ~ i j3;~?, z;;, 10E~5 ~ 10E-4 10E•3 10E~2 14E•1 1 10 Percent Exceedin early Peaks for developed W/O Pond YEAR (1041 (its) 100 11 39 -~ 3 ~ ~~ii j~~ ~3ij ~~ ri ~ ~`~ ;; raj 3 ~~ 50 7 701 ~~' ~ ~~ i~z ~_~ ~ ~i ~ i~ iF 3 ' 31 ~~ ~~ s ~ ~i e( {# ~ _____ f ~ 25 5 045 ' , ` ~ ~ ~~ x ~3~{ ~ii F ~~~ ,'t 10 2.6$1 ~ ~ {{~ ~ ' ~~~~~` €~ :~ 2 :5459 Duration Graph (early Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart CLEARHIS BSN M1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M1 0 08 7 83 0 0264 0 38 SBUH/SCS TYPE1A 6 mo BSN M1 0 14 7 83 0 0461 0 38 SBUH/SCS TYPEIA 2 yr BSN M1 0 22 7 83 0 0751 0 38 SBUH/SCS TYPEIA 10 yr BSN M1 0 27 7 83 0 0900 0 38 SBUH/SCS TYPEIA 25 yr BSN M1 0 29 7 83 0 0975 0 38 SBUH/SCS TYPE1A 50 yr BSN M1 0 31 7 83 0 1051 0 38 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN M1 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor: 484.00 SCS Abs: 0 20 Storm Dur: 24.00 hrs Intv: 10 00 min Area CN TC Pervious 0.1007 ac 78.00 0 03 hrs Impervious 0.2843 ac 98.00 0 05 hrs Total 0 3850 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.1007 ac Impervious CN Data: ROADWAY 98.00 0 2099 ac SIDWALK 98.00 0 0285 ac DRIVEWAY 98.00 0 0459 ac Pervious TC Data: Flow type Description: Length: Slope: Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type. Description Length. Slope Coeff• Travel Time Shallow Along Flow Lme of Gutter 233 00 ft 1.66% 27.0000 1 12 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 100 00 ft 0.50% 21 0000 1 12 min Sheet Across Sidewalks 5.00 ft 2.00% 0.0110 0 14 min Sheet Across Driveway 20.00 ft 2.00% 0.0110 0 42 mm BSN M2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M2 0 12 8 00 0 0394 0 49 SBUH/SCS TYPE1A 6 mo BSN M2 0 20 8 00 0 0669 0 49 SBUHlSCS TYPEIA 2 yr BSN M2 0 31 8 00 0 1062 0 49 SBUH/SCS TYPEIA 10 yr BSN M2 0 37 8 00 0 1261 0 49 SBUH/SCS TYPEIA 25 yr BSN M2 0 39 8 00 0 1361 0 49 SBUH/SCS TYPE1A 50 yr BSN M2 0 42 8 00 0 1461 0 49 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN M2 Hyd Method. SBUH Hyd Loss Method: SCS CN Number Peak Factor: 484 00 SCS Abs• 0.20 Storm Dur: 24.00 hrs Intv• 10.00 min Area CN TC Pervious 0.0586 ac 78 00 0.03 hrs Impervious 0 4363 ac 98.00 Total 0.4949 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description Sheet Across Planter Stnp Impervious TC Data: Flow type: Description• Shallow Along Flow Lme of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks 0.10 hrs 0.0586 ac 0.2625 ac 01164 ac 0.0574 ac Length Slope: Coeff: Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length• Slope. Coeff: Travel Time 212.00 ft 0 50% 27 0000 2.46 min 27 00 ft 2.00% 0 0110 0 54 min 238 00 ft 0 50% 21 0000 2 67 min 12.00 ft 2.00% 0 0110 0 28 min ADDHYD [BSN M1] AS [6 mo] (BSN M2] AS [6 mo] TO [BSN M1 +BSN M2] Peak Flow: 0.1921 cfs Peak Time: 8 00 hrs Hyd Vol: 2867.14 cf - 0 0658 acft ADDHYD (BSN M1] AS [2 yr] (BSN M2] AS [2 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 3271 cfs Peak Time: 8 00 hrs Hyd Vol: 4921.48 cf - 0.1130 acft ADDHYD [BSN M1] AS [10 yr] [BSN M2] AS [10 yr] TO [BSN M1 +BSN M2] Peak Flow 0 5224 cfs Peak Time: 8.00 hrs Hyd Vol: 7894.47 cf - 0.1812 acft ADDHYD [BSN M1] AS [25 yr] [BSN M2] AS [25 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 6229 cfs Peak Time: 7 83 hrs Hyd Vol: 9411 41 cf - 0.2161 acft ADDHYD [BSN M1] AS [50 yr] [BSN M2] AS [50 yr] TO [BSN M1 +BSN M2] Peak Flow• 0 6737 cfs Peak Time. 7 83 hrs Hyd Vol: 10174.60 cf - 0.2336 acft ADDHYD [BSN M1] AS [100 yr] [BSN M2] AS [100 yr] TO [BSN M1 +BSN M2] Peak Flow: 0.7247 cfs Peak Time 7 83 hrs Hyd Vol 10940.68 cf - 0 2512 acft Hydrograph ID: BASIN M Area: 0 8799 ac Hyd Int 10.00 min Base Flow. Peak Flow 0 7247 cfs Peak Time: 7 83 hrs Hyd Vol: 0.2512 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0024 8 67 0 3015 16 50 0 1011 0 83 0 0092 8 83 0 2579 16 67 0 1011 100 00171 900 02610 1683 01012 1 17 0 0261 9 17 0 2248 17 00 0 1012 1 33 0 0347 9 33 0 1945 17 17 0 0976 1 50 0.0405 9 50 0 1969 17 33 0 0944 1 67 0 0472 9 67 0 1854 17 50 0 0947 1 83 0 0532 9 83 0 1766 17 67 0 0946 2 00 0 0570 10 00 0 1774 17 83 0 0946 2 17 0 0624 10 17 0 1666 18 00 0 0947 2 33 0 0673 10 33 0 1575 18.17 0 0910 2 50 0 0699 10 50 0 1583 18 33 0 0878 2 67 0 0722 10 67 0 1510 18 50 0 0881 2.83 0 0741 10 83 0 1449 18 67 0 0880 3 00 0 0757 11 00 0 1455 18 83 0 0881 3 17 0 0772 11 17 0 1418 19 00 0 0881 3 33 0 0785 11 33 0 1389 19 17 0 0844 3 50 0 0796 11 50 0 1392 19 33 0 0812 3 67 0.0832 11 67 0 1356 19 50 0 0815 3 83 0 0867 11 83 0 1326 19 67 0 0813 4 00 0 0875 12 00 0 1329 19 83 0 0814 4.17 0 0938 12 17 0 1293 20 00 0 0814 4 33 0 0997 12 33 0 1262 20 17 0 0814 4 50 0 1003 12 50 0 1265 20 33 0.0815 4 67 0 1067 12 67 0.1229 20 50 0 0815 4 83 0 1128 12 83 0.1198 20 67 0 0815 5 00 0 1139 13 00 0 1201 20 83 0 0815 5 17 0 1209 13 17 0 1201 21 00 0 0815 5 33 0 1274 13 33 0 1202 21 17 0 0816 5 50 0 1284 13 50 0 1202 21 33 0 0816 5 67 0 1356 13 67 0 1167 21 50 0 0816 5 83 0 1422 13 83 0 1136 21 67 0 0816 6 00 0 1431 14 00 0 1139 21 83 0 0816 6 17 0 1565 14 17 0 1138 22 00 0.0817 6 33 0 1689 14 33 0 1139 22 17 0 0779 6 50 0 1696 14 50 0 1139 22 33 0 0747 6 67 0 1899 14 67 0 1104 22 50 0 0750 6 83 0 2084 14 83 0.1072 22 67 0 0749 7 00 0 2091 15 00 0 1075 22 83 0 0749 7.17 0 2334 15 17 0 1074 23 00 0 0749 7 33 0 2554 15 33 0 1075 23 17 0 0750 7 50 0 2561 15 50 0 1076 23 33 0.0750 7.67 0 5000 15 67 0 1039 23 50 0 0750 7.83 0 7247 15.83 0.1008 23 67 0 0750 8.00 0 7215 16 00 0 1011 23 83 0 0750 8 17 0 5287 16 17 0.1010 24 00 0 0750 8.33 0 3456 16 33 0 1011 24 17 0.0339 8 50 0 3597 16 50 0 1011 24 33 0 0018 Hydrograph ID: BASIN M Area: 0.8799 ac Hyd Int: 10.00 min Base Flow: Peak Flow. 0.7247 cfs Peak Time. 7 83 hrs Hyd Vol• 0.2512 acft MOVEHYD [BASIN M] TO [BASIN M - 6 mo] AS [6 mo] Peak Flow• 0 1921 cfs Peak Time: 8 00 hrs Hyd Vol. 2867.14 cf - 0 0658 acft MOVEHYD [BASIN M] TO [BASIN M - 100 yr] AS [100 yr] Peak Flow 0.7247 cfs Peak Time• 7.83 hrs Hyd Vol 10940 68 cf - 0.2512 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 324.0000 ft 328 5000 ft 0 10 Infil: 10 00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE M Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 140.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh.1 v Routing Method• Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3.OOh.1 v Up Node Dn Node Up Invert Dn Invert DUMMY M 0.0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Mln Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3.0000 ft 0.5000 ft 1.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 8799 ac 1.1025 cf 1.1025 cf 1.4308 ft/s 0.1234 ft Ent Loss Exit Loss Frlct Loss Start TW 0.000000 ft 0 000000 ft 0 000000 ft 0.0000 ft ROUTEHYD [BASIN M - 6 mo] THRU [BIOSWALE M] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ftls ft/s ---------- BIOSWALE M 0 8799 0.1921 ---- 1 00 0 0569 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN M - 100 yr] THRU [BIOSWALE M] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0 8799 0 7247 ---- 1 00 0 1234 Ditch 0 9308 ----- BASIN M Node ID: INFILTRATION M Desc Manhole structure Start EI: 328 5000 ft Max EI. 329.5000 ft Contrib Basin. Contrib Hyd Length Width Vold Ratio 140.0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN M RLP Desc. Manhole structure Start EI. 328.5000 ft Max EI 329.5000 ft Contrib Basin: Contrib Hyd Storage Id: INFILTRATION M Discharge Id INFILTRATION RLPCOMPUTE [BASIN M RLP] SUMMARY 100 yr MatchQ=PeakO= 0.7247 cfs Peak Out Q: 0 4783 cfs -Peak Stg: 329.49 ft - Active Vol: 1336.12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -M Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin M Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 DEVELOPED LAND USE Basin Basin M Flows To Bio-Infiltration Swale M Groundwater: Yes Land Use ' Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale M Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raa.n / Evap is not activated. n; ,~ e„ ~ , ,,., e Depth: aft. Bottom Length: 140ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Ra.ser Diameter: 54 in. 0.019 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(c£s) 328.0 0.032 0.000 0.000 0.000 328.1 0.034 0.003 0.000 0.324 328.2 0.035 0.005 0.000 0.324 328.2 0.037 0.008 0.000 0.329 328.3 0.039 0.011 0.000 0.324 ~~~~ ~, ~~~~~ ,~SF,PH Dq~~ I ~eoF was~tc ~~ ~ ~ q ., ~ • C 3-t5'_S "~ R ~Fo~s~ e~wv ~ ,~ i~ I~fYAI.Y~~'f~ ~.~ 09-~2 -05 IXPIRES• 11-22- ~~ 328.4 0.040 0.014 0.000 0.324 328.5 0.042 0.017 0.000 0.324 328.5 0.044 0.021 0.411 0.329 328.6 0.045 0.024 1.873 0.324 328.7 0.047 0.028 3.920 0.324 328.8 0.049 0.031 6.916 0.324 328.9 0.050 0.035 9.292 0.324 328.9 0.052 0.039 12.50 0.329 329.0 0.054 0.093 16.01 0.324 329.1 0.056 0.048 19.81 0.329 329.2 0.057 0.052 23.86 0.324 329.2 0.059 0.057 28.15 0.324 329.3 0.061 0.061 32.67 0.324 329.4 0.063 0.066 37.42 0.324 329.5 0.064 0.071 42.37 0.324 329.6 0.066 0.076 47.53 0.324 329.6 0.068 0.081 52.88 0.324 329.7 0.070 0.087 58.41 0.324 329.8 0.072 0.092 64.13 0.324 329.9 0.074 0.098 70.02 0.329 329.9 0.075 0.104 76.08 0.329 330.0 0.077 0.110 82.31 0.324 330.1 0.079 0.116 88.70 0.324 330.2 0.081 0.122 95.24 0.324 330.3 0.083 0.128 10].9 0.329 330.3 0.085 0.135 108.8 0.329 330.4 0.087 0.141 115.8 0.329 330.5 0.089 0.198 122.9 0.329 330.6 0.091 0.155 130.2 0.329 330.6 0.093 0.162 137.6 0.324 330.7 0.095 0.170 145.2 0.324 330.8 0.096 0.177 152.9 0.324 330.9 0.098 0.185 160.7 0.324 331.0 0.100 0.192 168.6 0.324 331.0 0.102 0.200 176.7 0.324 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(efs) 2 year 0.292853 5 year 0.357773 10 year 0.398136 25 year 0.446964 50 year 0.482097 100 year 0.516377 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.292853 5 year 0.357773 10 year 0.398136 25 year 0.446964 50 year 0.982097 100 year 0.516377 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.049867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.281 0.000 1957 0.447 0.093 1958 0.256 0.000 1959 0.298 0.000 1960 0.328 0.000 1961 0.221 0.000 1962 0.235 0.000 1963 0.484 0.051 1969 0.343 0.000 1965 0.325 0.000 1966 0.227 0.000 1967 0.283 0.000 1968 0.218 0.000 1969 0.215 0.000 1970 0.214 0.000 1971 0.267 0.000 1972 0.332 0.000 1973 0.252 0.000 1974 0.293 0.000 1975 0.254 0.000 1976 0.294 0.000 1977 0.371 0.000 1978 0.315 0.000 1979 0.375 0.000 1980 0.281 0.000 1981 0.323 0.000 1982 0.371 0.000 1983 0.398 0.023 1984 0.243 0.000 1985 0.281 0.000 1986 0.315 0.000 1987 0.346 0.000 1988 0.186 0.000 1989 0.223 0.000 1990 0.940 0.057 1991 0.463 0.061 1992 0.273 0.000 1993 0.200 0.000 1994 0.223 0.000 1995 0.322 0.000 1996 0.327 0.000 1997 0.264 0.000 1998 0.369 0.000 1999 0.317 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.9635 0.0608 2 0.4467 0.0567 3 0.4401 0.0511 4 0.3977 0.0233 5 0.3747 0.0000 6 0.3715 0.0000 7 0.3705 0.0000 8 0.3692 0.0000 9 0.3959 0.0000 10 0.3430 0.0000 11 0.3318 0.0000 12 0.3280 0.0000 13 0.3271 0.0000 14 0.3252 0.0000 15 0.3227 0.0000 16 0.3223 0.0000 17 0.3171 0.0000 18 0.3152 0.0000 19 0.3148 0.0000 20 0.2980 0.0000 0.2941 0.0000 0.2935 0.0000 0.2829 0.0000 0.2811 0.0000 0.2810 0.0000 0.2806 0.0000 0.2733 0.0000 0.2669 0.0000 0.2635 0.0000 0.2560 0.0000 0.2542 0.0000 0.2520 0.0000 0.2934 0.0000 0.2354 0.0000 0.2266 0.0000 0.2225 0.0000 0.2225 0.0000 0.2210 0.0000 0.2178 0.0000 0.2146 0.0000 0.2143 0.0000 0.2003 0.0000 0.1860 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1969 1041 0 .0 Pass 0.1498 977 0 .0 Pass 0.1532 893 0 .0 Pass 0.1566 831 0 .0 Pass 0.1600 783 0 .0 Pass 0.1634 716 0 .0 Pass 0.1668 667 0 .0 Pass 0.1702 613 0 .0 Pass 0.1736 573 0 .0 Pass 0.1769 535 0 .0 Pass 0.1803 489 0 .0 Pass 0.1837 457 0 .0 Pass 0.1871 419 0 .0 Pass 0.1905 384 0 .0 Pass 0.1939 356 0 .0 Pass 0.1973 330 0 .0 Pass 0.2007 313 0 .0 Pass 0.2041 291 0 .0 Pass 0.2075 266 0 .0 Pass 0.2108 253 0 .0 Pass 0.2142 235 0 .0 Pass 0.2176 215 0 .0 Pass 0.2210 193 0 .0 Pass 0.2244 181 0 .0 Pass 0.2278 170 0 .0 Pass 0.2312 163 0 .0 Pass 0.2346 158 0 .0 Pass 0.2380 152 0 .0 Pass 0.2414 145 0 .0 Pass 0.2448 141 0 .0 Pass 0.2481 137 0 .0 Pass 0.2515 131 0 .0 Pass 0.2599 122 0 .0 Pass 0.2583 113 0 .0 Pass 0.2617 108 0 .0 Pass 0.2651 99 0 .0 Pass 0.2685 93 0 .0 Pass 0.2719 89 0 .0 Pass 0.2753 85 0 .0 Pass 0.2787 78 0 .0 Fass 0.2821 72 0 .0 Pass 0.2854 69 0 .0 Pass 0.2888 65 0 .0 Pass 0.2922 60 0 .0 Pass 0.2956 57 0 .0 Pass 0.2990 52 0 .0 Pass 0.3024 47 0 .0 Pass 0.3058 47 0 .0 Pass 0.3092 43 0 .0 Pass 0.3126 40 0 .0 Pass 0.3160 38 0 .0 Pass 0.3193 35 0 .0 Pass 0.3227 30 0 .0 Pass 0.3261 27 0 .0 Pass 0.3295 25 0 .0 Pass 0.3329 29 0 .0 Pass 0.3363 21 0 .0 Pass 0.3397 20 0 .0 Pass 0.3431 19 0 .0 Pass 0.3965 16 0 .0 Pass 0.3499 16 0 .0 Pass 0.3533 16 0 .0 Pass 0.3566 16 0 .0 Pass 0.3600 13 0 .0 Pass 0.3634 12 0 .0 Pass 0.3668 12 0 .0 Pass 0.3702 11 0 .0 Pass 0.3736 9 0 .0 Pass 0.3770 8 0 .0 Pass 0.3804 8 0 .0 Pass 0.3838 8 0 .0 Pass 0.3872 8 0 .0 Pass 0.3906 8 0 .0 Pass 0.3939 7 0 .0 Pass 0.3973 7 0 .0 Pass 0.4007 5 0 .0 Pass 0.4041 5 0 .0 Pass 0.4075 5 0 .0 Pass 0.4109 5 0 .0 Pass 0.4143 5 0 .0 Pass 0.4177 5 0 .0 Pass 0.4211 5 0 .0 Pass 0.4245 5 0 .0 Pass 0.4278 5 0 .0 Pass 0.4312 5 0 .0 Pass 0.4346 5 0 .0 Pass 0.4380 5 0 .0 Pass 0.4419 4 0 .0 Pass 0.9448 4 0 .0 Pass 0.4482 2 0 .0 Pass 0.4516 2 0 .0 Pass 0.4550 2 0 .0 Pass 0.4584 2 0 .0 Pass 0.4618 2 0 .0 Pass 0.4651 1 0 .0 Pass 0.4685 1 0 .0 Pass 0.4719 1 0 .0 Pass 0.4753 1 0 .0 Pass 0.9787 1 0 .0 Pass 0.4821 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.015 acre-feet On-line facility target £low: 0.09 cfs. Adjusted for 15 min: 0.1 cfs. Off-line Facility target flow: 0.06 cfs. Adjusted for 15 min: 0.07 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event sha]1 AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 ~kkkYkkkkkkk?a4Ps?Md3A:#.,>4A5(>dkkkkkkkk .~+.. w 1.0 ~ ,oc~r~oocAOOaoooa ~ ,yp0006OJ ~- o Predeveloped ,~ 10E-1 x Developed Mitigated ~ Yx v~ 1aE•s 1 10 20 70 d0 50 60 70 SO 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR F~oW t~> 100 9324 0 87 ___r r _ _ _a Pre~ueM~ped_ __ ~ 50 8716 -~ , ~ ~ ! ~ ; ! ` ~ 4 x Developed ~~ facility 3 25 8092 ---t ~ . ~ i , 0 72 . , , , . , . s ~ ... 10 ,7223 3 ~ - ~ 0 S7 .. _ _ e_.._ ... ~ ~ .. S 6504 ' ~~---°~~-r--- ~'y ~ , ~ ; t t~ ~~..._~_,. _ __ _____ a ...~__ _ ~. 042 }~ ~ ~ ~ ~ ~ ~ ~ ~ 2 ,5343 f; s f ~ J~ ~ _ .._ _ _. ._ ___ __ ~. _ _ . ~ __ ~ 0 27 ---_ ~ 1 ~~ f - , , 1~•5 ~ 10E-4 10E•3 1~~2 10E~1 1 10 - Percent Exceedin early Peaks for developed W/O Pond TEAR FLOW (cfs) 100 11 38 50 7 701 ~~ ~ ~ (; €,'~ a ~t(~3 i ~ ir 3~ ~ i 3 , 25 5 OAS - r f~ - _ ! t €F+ ~ ii ~ { , 1 ~ ~~ £3 10 ~ 2.6$1 ~ 7~~ i} '} ~ t ? ; ~ .i.~_ _ , : _ ' ~ 1 , ~ ' ,~ S ~ 1 Sib --~-- ~- ~-~ - - -~..•-F-'-~-----•'~' j ` 3 1 ; ' i ' ~ ~ , ~ ~ , , ~ ~ 2 5459 -- Duration Graph Yearly Peaks for Developed W/Pond CLEARHIS BSN M1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M1 0 08 7 83 0 0264 0 38 SBUH/SCS TYPE1A 6 mo BSN M1 0 14 7 83 0 0461 0 38 SBUH/SCS TYPEIA 2 yr BSN M1 0 22 7 83 0 0751 0 38 SBUH/SCS TYPEIA 10 yr BSN M1 0 27 7 83 0 0900 0 38 SBUH/SCS TYPE1A 25 yr BSN M1 0 29 7 83 0 0975 0 38 SBUHlSCS TYPEIA 50 yr BSN M1 0 31 7 83 0 1051 0 38 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN M1 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor: 484.00 SCS Abs: 0 20 Storm Dur: 24.00 hrs Intv: 10 00 min Area CN TC Pervious 0.1007 ac 78.00 0 03 hrs Impervious 0 2843 ac 98.00 0.05 hrs Total 0.3850 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.1007 ac Impervious CN Data: ROADWAY 98 00 0.2099 ac SIDWALK 98 00 0.0285 ac DRIVEWAY 98 00 0.0459 ac Pervious TC Data: Flow type: Description: Length Slope. Coeff• Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type: Description. Length: Slope: Coeff: Travel Time Shallow Along Flow Line of Gutter 233 00 ft 1 66% 27.0000 1.12 min Sheet Across Roadway 18 50 ft 2.00% 0.0110 0 40 min Channel Through Strom Water Pipe 100.00 ft 0.50% 21.0000 1.12 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20.00 ft 2 00% 0 0110 0.42 min BSN M2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M2 0 12 8 00 0 0394 0 49 SBUH/SCS TYPEIA 6 mo BSN M2 0 20 8 00 0 0669 0 49 SBUH/SCS TYPEIA 2 yr BSN M2 0 31 8 00 0 1062 0 49 SBUH/SCS TYPEIA 10 yr BSN M2 0 37 8 00 0 1261 0 49 SBUH/SCS TYPE1A 25 yr BSN M2 0 39 8 00 0 1361 0 49 SBUH/SCS TYPEIA 50 yr BSN M2 0 42 8 00 0 1461 0 49 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN M2 Hyd Method: SBUH Hyd Loss Method SCS CN Number Peak Factor: 484.00 SCS Abs. 0.20 Storm Dur 24 00 hrs Intv. 10 00 min Area CN TC Pervious 0.0586 ac 78 00 0 03 hrs Impervious 0.4363 ac 98.00 0 10 iirs Total 0.4949 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0586 ac Impervious CN Data: ROADWAY 98.00 0.2625 ac SIDWALK 98 00 0.1164 ac DRIVEWAY 98 00 0 0574 ac Pervious TC Data: Flow type. Description. Length: Slope Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description. Length: Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 212.00 ft 0.50% 27 0000 2.46 min Sheet Across Roadway 27.00 ft 2.00% 0.0110 0 54 mm Channel Through Strom Water Pipe 238.00 ft 0.50% 21 0000 2 67 min Sheet Across Sidewalks 12 00 ft 2.00% 0 0110 0.28 min ADDHYD [BSN M1] AS [6 mo) (BSN M2) AS [6 mo] TO [BSN M1 +BSN M2] Peak Flow: 0.1921 cfs Peak Time: 8 00 hrs Hyd Vol: 2867 14 cf - 0 0658 acft ADDHYD [BSN M1] AS [2 yr] [BSN M2] AS [2 yr] TO [BSN M1 +BSN M2] Peak Flow: 0.3271 cfs Peak Time: 8 00 hrs Hyd Vol: 4921.48 cf - 0 1130 acft ADDHYD [BSN M1] AS [10 yr] [BSN M2] AS [10 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 5224 cfs Peak Time: 8 00 hrs Hyd Vol: 7894 47 cf - 0.1812 acft ADDHYD [BSN M1] AS [25 yr] [BSN M2] AS [25 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 6229 cfs Peak Time: 7.83 hrs Hyd Vol: 9411 41 cf - 0.2161 acft ADDHYD (BSN M1] AS [50 yr] [BSN M2] AS [50 yr] TO [BSN M1 +BSN M2) Peak Flow. 0.6737 cfs Peak Time. 7 83 hrs Hyd Vol: 10174.60 cf - 0 2336 acft ADDHYD [BSN M1] AS [100 yr] [BSN M2] AS [100 yr] TO [BSN M1 +BSN M2] Peak Flow 0.7247 cfs Peak Time: 7 83 hrs Hyd Vol. 10940.68 cf - 0.2512 acft Hydrograph ID: BASIN M Area 0.8799 ac Hyd Int. 10.00 min Base Flow: Peak Flow: 0 7247 cfs Peak Time: 7 83 hrs Hyd Vol: 0.2512 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0.67 0 0024 8 67 0 3015 16 50 0 1011 0 83 0 0092 8 83 0 2579 16 67 0 1011 1 00 0 0171 9 00 0 2610 16 83 0 1012 1 17 0 0261 9 17 0 2248 17 00 0 1012 1 33 0 0347 9 33 0 1945 17 17 0 0976 1 50 0 0405 9 50 0 1969 17 33 0 0944 1 67 0 0472 9 67 0 1854 17 50 0 0947 1 83 0 0532 9 83 0 1766 17 67 0 0946 2 00 0 0570 10 00 0 1774 17 83 0 0946 2 17 0 0624 10 17 0 1666 18 00 0 0947 2 33 0 0673 10 33 0 1575 18 17 0 0910 2 50 0 0699 10 50 0 1583 18 33 0 0878 2 67 0 0722 10 67 0 1510 18 50 0 0881 2 83 0 0741 10 83 0 1449 18 67 0 0880 3 00 0 0757 3.17 0 0772 3 33 0 0785 3 50 0 0796 3 67 0 0832 3 83 0 0867 4 00 0 0875 4 17 0 0938 4 33 0 0997 4 50 0 1003 4 67 0 1067 4 83 0 1128 5 00 0 1139 5 17 0 1209 5.33 0 1274 5 50 0.1284 5 67 0 1356 5 83 0 1422 6 00 0 1431 6 17 0 1565 6 33 0 1689 6 50 0 1696 6 67 0 1899 6 83 0 2084 7 00 0 2091 7 17 0 2334 7 33 0 2554 7 50 0 2561 7 67 0 5000 7 83 0 7247 8 00 0 7215 8 17 0 5287 8 33 0 3456 8 50 0 3597 Hydrograph ID: BASIN M Area: 0 8799 ac Peak Flow. 0 7247 cfs 11 00 0 1455 18 83 0 0881 11 17 0 1418 19 00 0 0881 11 33 0 1389 19.17 0 0844 11 50 0 1392 19 33 0 0812 11 67 0 1356 19 50 0 0815 11 83 0 1326 19 67 0 0813 12 00 0.1329 19 83 0 0814 12 17 0 1293 20.00 0 0814 12 33 0 1262 20.17 0 0814 12 50 0 1265 20 33 0 0815 12 67 0 1229 20 50 0 0815 12 83 0 1198 20 67 0 0815 13 00 0 1201 20 83 0 0815 13 17 0 1201 21 00 0 0815 13 33 0 1202 21 17 0 0816 13 50 0 1202 21 33 0 0816 13 67 0 1167 21 50 0 0816 13 83 0 1136 21 67 0 0816 14 00 0 1139 21 83 0 0816 14 17 0 1138 22 00 0.0817 14 33 0 1139 22 17 0 0779 14 50 0 1139 22 33 0 0747 14 67 0 1104 22 50 0 0750 14 83 0.1072 22 67 0 0749 15 00 0 1075 22 83 0 0749 15 17 0.1074 23 00 0.0749 15 33 0 1075 23 17 0 0750 15 50 0 1076 23 33 0 0750 15 67 0 1039 23 50 0.0750 15.83 0 1008 23 67 0 0750 16 00 0.1011 23 83 0 0750 16.17 0 1010 24 00 0 0750 16 33 0 1011 24 17 0 0339 16 50 0 1011 24 33 0 0018 Hyd Int: 10.00 min Base Flow. Peak Time 7 83 hrs Hyd Vol. 0.2512 acft MOVEHYD [BASIN M] TO [BASIN M - 6 mo] AS [6 mo] Peak Flow• 0.1921 cfs Peak Time: 8.00 hrs Hyd Vol: 2867.14 cf - 0.0658 acft MOVEHYD [BASIN M] TO [BASIN M - 100 yr] AS [100 yr] Peak Flow: 0.7247 cfs Peak Time: 7 83 hrs Hyd Vol: 10940 68 cf - 0 2512 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp: Multiple Orifice Start EI Max EI Increment 324.0000 ft 328 5000 ft 0.10 Infil: 10.00 in/hr Multiplier 1.00 Reach ID: BIOSWALE M Section Properties: Shape• Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 140 0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh.1 v Routing Method. Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh.1v Up Node Dn Node Up Invert Dn Invert DUMMY M 0 0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Mln drop 0.5000 ft 1 0000 ft 3 0000 ft 0 5000 ft 1 0000 ft 0.0000 ft In/Exfd Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 8799 ac 1 1025 cf 1 1025 cf 1.4308 ft/s 0 1234 ft Ent Loss Exit Loss Frict Loss Start TW 0 000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN M - 6 mo] THRU [BIOSWALE M] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ftls ---------- BIOSWALE M 0 8799 0 1921 ---- 1 00 0 0569 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN M - 100 yr] THRU [BIOSWALE M] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0 8799 0 7247 ---- 1 00 0 1234 Ditch 0 9308 ----- BASIN M Node ID: INFILTRATION M Desc Manhole structure Start EI: 328.5000 ft Max EI• 329.5000 ft Contrib Basin: Contrib Hyd: Length Width Void Ratio 140 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN M RLP Desc• Manhole structure Start EI: 328 5000 ft Max EI 329 5000 ft Contrib Basin Contrib Hyd: Storage Id: INFILTRATION M Discharge Id' INFILTRATION RLPCOMPUTE [BASIN M RLP] SUMMARY 100 yr MatchQ=PeakO= 0.7247 cfs Peak Out Q. 0 4783 cfs -Peak Stg. 329 49 ft - Active Vol. 1336 12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra BASIN -M Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin M Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 DEVELOPED LAND USE Basin Basin M Flows To Bio-Infiltration Swale M Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale M Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Tlimcncinna Depth: aft. Bottom Length: 140ft. Bottom Width loft. Sa.de slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.019 acre-ft. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 328.0 0.032 0.000 0.000 0.000 328.1 0.034 0.003 0.000 0.324 328.2 0.035 0.005 0.000 0.329 328.2 0.037 0.008 0.000 0.329 328.3 0.039 0.011 0.000 0.329 ~~g~~ ~~ ~~`~r''Jt~ ~gEPN Dq~~ eoF waswt• 'o ~ ~~~ co 4 ~ y C7 ~~.-- ~S~S `~ FC~S'1 EµV K ,g {~ IO"~~~' d9-~2-05 CIXPIRFS• ! 1-22- 328.4 0.040 0.014 0.000 0.324 328.5 0.042 0.017 0.000 0.324 328.5 0.044 0.021 0.411 0.324 328.6 0.045 0.029 1.873 0.324 328.7 0.047 0.028 3.920 0.324 328.8 0.049 0.031 6.416 0.324 328.9 0.050 0.035 9.292 0.324 328.9 0.052 0.039 12.50 0.324 329.0 0.054 0.043 16.01 0.329 329.1 0.056 0.048 19.81 0.324 329.2 0.057 0.052 23.86 0.324 329.2 0.059 0.057 28.15 0.324 329.3 0.061 0.061 32_.67 0.324 329.4 0.063 0.066 37.42 0.324 329.5 0.064 0.071 42.37 0.324 329.6 0.066 0.076 47.53 0.324 329.6 0.068 0.081 52.88 0.324 329.7 0.070 0.087 58.41 0.329 329.8 0.072 0.092 64.13 0.324 329.9 0.074 0.098 70.02 0.324 329.9 0.075 0.104 76.08 0.324 330.0 0.077 0.110 82.31 0.324 330.1 0.079 0.116 88.70 0.324 330.2 0.081 0.122 95.24 0.324 330.3 0.083 0.128 101.9 0.324 330.3 0.085 0.135 108.8 0.324 330.4 0.087 0.141 115.8 0.324 330.5 0.089 0.148 122.9 0.324 330.6 0.091 0.155 130.2 0.324 330.6 0.093 0.162 137.6 0.324 330.7 0.095 0.170 145.2 0.324 330.8 0.096 0.177 152.9 0.324 330.9 0.098 0.185 160.7 0.329 331.0 0.100 0.192 168.6 0.324 331.0 0.102 0.200 176.7 0.329 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Flow (cfs) Predeveloped 0.292853 0.357773 0.398136 0.446964 0.482097 0.516377 Periods for Developed Unmitigated Flow (cfs ) 0.292853 0.357773 0.398136 0.946964 0.982097 0.516377 Periods for Developed Mitigated Flow (cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.281 0.000 1957 0.447 0.093 1958 0.256 0.000 1959 0.298 0.000 1960 0.328 0.000 1961 0.221 0.000 1962 0.235 0.000 1963 0.484 0.051 1964 0.343 0.000 1965 0.325 0.000 1966 0.227 0.000 1967 0.283 0.000 1968 0.218 0.000 1969 0.215 0.000 1970 0.214 0.000 1971 0.267 0.000 1972 0.332 0.000 1973 0.252 0.000 1974 0.293 0.000 1975 0.254 0.000 1976 0.294 0.000 1977 0.371 0.000 1978 0.315 0.000 1979 0.375 0.000 1980 0.281 0.000 1981 0.323 0.000 1982 0.371 0.000 1983 0.398 0.023 1984 0.243 0.000 1985 0.281 0.000 1986 0.315 0.000 1987 0.396 0.000 1988 0.186 0.000 1989 0.223 0.000 1990 0.440 0.057 1991 0.463 0.061 1992 0.273 0.000 1993 0.200 0.000 1994 0.223 0.000 1995 0.322 0.000 1996 0.327 0.000 1997 0.264 0.000 1998 0.369 0.000 1999 0.317 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4635 0.0608 2 0.9467 0.0567 3 0.9401 0.0511 4 0.3977 0.0233 5 0.3747 0.0000 6 0.3715 0.0000 7 0.3705 0.0000 8 0.3692 0.0000 9 0.3459 0.0000 10 0.3430 0.0000 11 0.3318 0.0000 12 0.3280 0.0000 13 0.3271 0.0000 19 0.3252 0.0000 15 0.3227 0.0000 16 0.3223 0.0000 17 0.3171 0.0000 18 0.3152 0.0000 19 0.3148 0.0000 20 0.2980 0.0000 0.2941 0.0000 0.2935 0.0000 0.2829 0.0000 0.2811 0.0000 0.2810 0.0000 0.2806 0.0000 0.2733 0.0000 0.2669 0.0000 0.2635 0.0000 0.2560 0.0000 0.2542 0.0000 0.2520 0.0000 0.2939 0.0000 0.2354 0.0000 0.2266 0.0000 0.2225 0.0000 0.2225 0.0000 0.2210 0.0000 0.2178 0.0000 0.2146 0.0000 0.2193 0.0000 0.2003 0.0000 0.1860 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1469 1041 0 .0 Pass 0.1498 977 0 .0 Pass 0.1532 893 0 .0 Pass 0.1566 831 0 .0 Pass 0.1600 783 0 .0 Pass 0.1634 716 0 .0 Pass 0.1668 667 0 .0 Pass 0.1702 613 0 .0 Pass 0.1736 573 0 .0 Pass 0.1769 535 0 .0 Pass 0.1803 489 0 .0 Pass 0.1837 457 0 .0 Pass 0.1871 419 0 .0 Pass 0.1905 384 0 .0 Pass 0.1939 356 0 .0 Pass 0.1973 330 0 .0 Pass 0.2007 313 0 .0 Pass 0.2041 291 0 .0 Pass 0.2075 266 0 .0 Pass 0.2108 253 0 .0 Pass 0.2142 235 0 .0 Pass 0.2176 215 0 .0 Pass 0.2210 193 0 .0 Pass 0.2244 181 0 .0 Pass 0.2278 170 0 .0 Pass 0.2312 163 0 .0 Pass 0.2346 158 0 .0 Pass 0.2380 152 0 .0 Pass 0.2414 145 0 .0 Pass 0.2448 141 0 .0 Pass 0.2481 137 0 .0 Pass 0.2515 131 0 .0 Pass 0.2549 122 0 .0 Pass 0.2583 113 0 .0 Pass 0.2617 108 0 .0 Pass 0.2651 99 0 .0 Pass 0.2685 93 0 .0 Pass 0.2719 89 0 .0 Pass 0.2753 85 0 .0 Pass 0.2787 78 0 .0 Pass 0.2821 72 0 .0 Pass 0.2854 69 0 .0 Pass 0.2888 65 0 .0 Pass 0.2922 60 0 .0 Pass 0.2956 57 0 .0 Pass 0.2990 52 0 .0 Pass 0.3024 97 0 .0 Pass 0.3058 47 0 .0 Pass 0.3092 93 0 .0 Pass 0.3126 40 0 .0 Pass 0.3160 38 0 .0 Pass 0.3193 35 0 .0 Pass 0.3227 30 0 .0 Pass 0.3261 27 0 .0 Pass 0.3295 25 0 .0 Pass 0.3329 24 0 .0 Pass 0.3363 21 0 .0 Pass 0.3397 20 0 .0 Pass 0.3431 19 0 .0 Pass 0.3465 16 0 .0 Pass 0.3499 16 0 .0 Pass 0.3533 16 0 .0 Pass 0.3566 16 0 .0 Pass 0.3600 13 0 .0 Pass 0.3634 12 0 .0 Pass 0.3668 12 0 .0 Pass 0.3702 11 0 .0 Pass 0.3736 9 0 .0 Pass 0.3770 8 0 .0 Pass 0.3804 8 0 .0 Pass 0.3838 8 0 .0 Pass 0.3872 8 0 .0 Pass 0.3906 8 0 .0 Pass 0.3939 7 0 .0 Pass 0.3973 7 0 .0 Pass 0.4007 5 0 .0 Pass 0.4041 5 0 .0 Pass 0.4075 5 0 .0 Pass 0.4109 5 0 .0 Pass 0.9143 5 0 .0 Pass 0.4177 5 0 .0 Pass 0.4211 5 0 .0 Pass 0.4245 5 0 .0 Pass 0.4278 5 0 .0 Pass 0.4312 5 0 .0 Pass 0.9346 5 0 .0 Pass 0.4380 5 0 .0 Pass 0.4419 4 0 .0 Pass 0.9448 9 0 .0 Pass 0.4482 2 0 .0 Pass 0.45]6 2 0 .0 Pass 0.4550 2 0 .0 Pass 0.4584 2 0 .0 Pass 0.4618 2 0 .0 Pass 0.4651 1 0 .0 Pass 0.4685 1 0 .0 Pass 0.4719 1 0 .0 Pass 0.4753 1 0 .0 Pass 0.4787 1 0 .0 Pass 0.4821 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.015 acre-feet On-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.1 cfs. Off-line facility target flow: 0.06 cfs. Adjusted for 15 min: 0.07 cfs. program and accompanying documentation as provided 'as-is' without warranty of any Y.ind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERR11 Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. in no event sha]1 AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEAR FLOW (ctsJ 100.9324 --------°- • 1Q~ kkkk`rkkkkkYkS0~44r+FS~9P?SOP4~OP'kk}skkkkk F , 50 .8716 _~ . ~._.: ?: , ', ° ~ 3 , ~ , ~ 25 ~ 8092 „ ~ ~; ~ ~; .~. ~ , ~ 1A 10 7223 ~ - - _` ; ~ ~ooooo0 nc~ 5 5504 , , , ~: 41 baaoaoo ~ ~ ~ o Predeveloped .2 ~ Sgg3 ~ ~ 'f0E-1 x Developed Mitigated , ~ ~ xx , " { 3 ~ 1 10 20 30 d0 30 60 70 80 90 99 Culnuiative_Probability Yearly Peaks for Predeveloped Flow Frequency Chart YEAR ~ FLOW (chJ 100: 9324 0 # -~° , , 0 87 __~ _~ __ _ __ _ o-Pre~uek~d -- 50 8716 ° f ~ i ~ ? ~ ~ ~ ~~~~ ~ ~ o x Developed w~ Facility 25 .8092 ~:,~...,....,~. ~ i ? 0 72 .... _ _ .. ... . u , . _. 3 10 .1223 '~ f ', ~ '> ; , ~ 0 57 - ~_ s 5 .5504 ~ ~ '' ~'j~ ~ 1, _ _ . ____ _ _ _._ ~~ ~4uI~~P 1, ~~ ~ 042 [ ~ 2 ,5343 ~ i ~ 3 I _ _ _ _ __~ .. _ . ~~ t: ~~ 33, ~ 027 3 ~ r ~ Y~A 3 ` , (i ~ N 3 1 ~, ~ ~ ' , , ~ , , : , ~ 10E-5 ~ 10E•4 10E•3 10E~2 10E•1 1 10 , 1 i , Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR FLOW {cis} 100 1138 -~--~-~--~- , ~i i ~ '3~ ' ;93, ~ I ~~i i ,i 1 ~ 3 , ~[;,~,~ ; $~ ,7 101 f ~ ~ r ~ ~~~ ~, ~ ~" ;~ j i s ~ ~ ~ 1 , , 25 ° 5 04.i 1 ~ ~ , , ~ ~ ~ !~ 5 1518 ~, ~1 ~ ~ ~ ~~ 2 .5459 'it, _ ;E i;, , Yearly Peaks for Developed W/Pond CLEARHIS BSN M1 Event Summary: BasmlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M1 0 08 7 83 0 0264 0 38 SBUH/SCS TYPEIA 6 mo BSN M1 0 14 7 83 0 0461 0 38 SBUH/SCS TYPE1A 2 yr BSN M1 0 22 7 83 0 0751 0 38 SBUH/SCS TYPE1A 10 yr BSN M1 0 27 7 83 0 0900 0 38 SBUH/SCS TYPEIA 25 yr BSN M1 0 29 7 83 0 0975 0 38 SBUH/SCS TYPEIA 50 yr BSN M1 0 31 7 83 0 1051 0 38 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN M1 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor 484.00 SCS Abs: 0 20 Storm Dur 24.00 hrs Inty: 10 00 min Area CN TC Pervious 0.1007 ac 78.00 0.03 hrs Impervious 0.2843 ac 98.00 0.05 hrs Total 0.3850 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0 1007 ac Impervious CN Data: ROADWAY 98.00 0 2099 ac SIDWALK 98.00 0 0285 ac DRIVEWAY 98.00 0 0459 ac Pervious TC Data: Flow type. Description• Length: Slope Coeff• Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description. Length Slope: Coeff Travel Time Shallow Along Flow Line of Gutter 233 00 ft 1.66% 27.0000 1.12 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 100.00 ft 0 50% 21 0000 1.12 min Sheet Across Sidewalks 5 00 ft 2.00% 0 0110 0.14 min Sheet Across Driveway 20.00 ft 2 00% 0 0110 0 42 min BSN M2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN M2 0 12 8 00 0 0394 0 49 SBUH/SCS TYPEIA 6 mo BSN M2 0 20 8 00 0 0669 0 49 SBUH/SCS TYPEIA 2 yr BSN M2 0 31 8 00 0 1062 0 49 SBUH/SCS TYPEIA 10 yr BSN M2 0 37 8 00 0 1261 0 49 SBUH/SCS TYPEIA 25 yr BSN M2 0 39 8 00 0 1361 0 49 SBUH/SCS TYPEIA 50 yr BSN M2 0.42 8 00 0 1461 0 49 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN M2 Hyd Method. SBUH Hyd Loss Method SCS CN Number Peak Factor: 484.00 SCS Abs• 0 20 Storm Dur• 24.00 hrs Intv: 10.00 min Area CN TC Pervious 0 0586 ac 78 00 0.03 hrs Impervious 0.4363 ac 98.00 0.10 hrs Total 0.4949 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0586 ac Impervious CN Data: ROADWAY 98.00 0.2625 ac SIDWALK 98.00 0.1164 ac DRIVEWAY 98.00 0.0574 ac Pervious TC Data: Flow type: Description: Length: Slope. Coeff. Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type: Description Length: Slope. Coeff Travel Time Shallow Along Flow Line of Gutter 212 00 ft 0 50% 27.0000 2.46 min Sheet Across Roadway 27 00 ft 2 00% 0.0110 0.54 min Channel Through Strom Water Pipe 238 00 ft 0 50% 21.0000 2.67 mm Sheet Across Sidewalks 12 00 ft 2.00% 0.0110 0.28 min ADDHYD [BSN M1] AS [6 mo] [BSN M2] AS (6 mo] TO [BSN M1 +BSN M2] Peak Flow 0 1921 cfs Peak Time: 8.00 hrs Hyd Vol: 2867 14 cf - 0 0658 acft ADDHYD [BSN M1] AS [2 yr] [BSN M2] AS [2 yr] TO [BSN M1 +BSN M2] Peak Flow 0 3271 cfs Peak Time. 8.00 hrs Hyd Vol: 4921.48 cf - 0.1130 acft ADDHYD [BSN M1] AS [10 yr] [BSN M2] AS [10 yr] TO [BSN M1 +BSN M2] Peak Flow: 0.5224 cfs Peak Time: 8 00 hrs Hyd Vol: 7894 47 cf - 0.1812 acft ADDHYD [BSN M1] AS [25 yr] [BSN M2] AS [25 yr] TO [BSN M1 +BSN M2] Peak Flow. 0.6229 cfs Peak Time 7 83 hrs Hyd Vol 9411 41 cf - 0 2161 acft ADDHYD [BSN M1] AS (50 yr] [BSN M2] AS [50 yr] TO [BSN M1 +BSN M2] Peak Flow: 0.6737 cfs Peak Time: 7 83 hrs Hyd Vol. 10174 60 cf - 0.2336 acft ADDHYD [BSN M1] AS (100 yr] [BSN M2] AS [100 yr] TO [BSN M1 +BSN M2] Peak Flow. 0.7247 cfs Peak Time. 7 83 hrs Hyd Vol• 10940.68 cf - 0.2512 acft Hydrograph ID: BASIN M Area 0 8799 ac Hyd Int• 10.00 mm Base Flow. Peak Flow: 0 7247 cfs Peak Time: 7 83 hrs Hyd Vol: 0.2512 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0024 8 67 0 3015 16 50 0 1011 0 83 0 0092 8 83 0 2579 16 67 0 1011 1 00 0 0171 9.00 0 2610 16 83 0 1012 1 17 0 0261 9 17 0 2248 17 00 0 1012 1 33 0 0347 9 33 0 1945 17 17 0 0976 1 50 0 0405 9 50 0 1969 17 33 0 0944 1 67 0 0472 9 67 0 1854 17 50 0 0947 1 83 0 0532 9 83 0 1766 17 67 0 0946 2 00 0 0570 10 00 0 1774 17 83 0 0946 2 17 0 0624 10 17 0 1666 18 00 0 0947 2 33 0 0673 10 33 0 1575 18 17 0 0910 2 50 0 0699 10 50 0 1583 18 33 0 0878 2 67 0 0722 10 67 0 1510 18 50 0 0881 2 83 0 0741 10 83 0 1449 18 67 0 0880 3 00 0 0757 3 17 0.0772 3 33 0.0785 3 50 0 0796 3.67 0 0832 3 83 0 0867 4 00 0 0875 4 17 0 0938 4 33 0 0997 4 50 0 1003 4 67 0 1067 4 83 0 1128 5 00 0 1139 5 17 0 1209 5 33 0 1274 5 50 0 1284 5 67 0.1356 5 83 0 1422 6 00 0 1431 6 17 0 1565 6 33 0 1689 6 50 0 1696 6 67 0 1899 6 83 0 2084 7 00 0 2091 7 17 0 2334 7 33 0 2554 7 50 0 2561 7 67 0 5000 7 83 0 7247 8 00 0 7215 8 17 0 5287 8 33 0 3456 8 50 0.3597 Hydrograph ID: BASIN M Area. 0.8799 ac Peak Flow: 0.7247 cfs 11 00 0 1455 18 83 0 0881 11 17 0 1418 19 00 0 0881 11 33 0.1389 19 17 0 0844 11 50 0 1392 19 33 0 0812 11 67 0 1356 19 50 0 0815 11 83 0 1326 19 67 0 0813 12 00 0 1329 19 83 0 0814 12 17 0 1293 20 00 0 0814 12 33 0 1262 20 17 0 0814 12 50 0 1265 20 33 0 0815 12 67 0 1229 20 50 0 0815 12 83 0.1198 20 67 0 0815 13 00 0.1201 20 83 0 0815 13 17 0 1201 21 00 0 0815 13 33 0 1202 21 17 0 0816 13 50 0 1202 21 33 0 0816 13 67 0 1167 21 50 0 0816 13 83 0 1136 21 67 0 0816 14 00 0 1139 21 83 0 0816 14 17 0 1138 22 00 0 0817 14 33 0 1139 22 17 0 0779 14 50 0 1139 22 33 0 0747 14 67 0 1104 22 50 0 0750 14 83 0 1072 22 67 0 0749 15 00 0 1075 22 83 0 0749 15 17 0 1074 23 00 0 0749 15 33 0 1075 23 17 0 0750 15 50 0 1076 23 33 0 0750 15 67 0 1039 23 50 0 0750 15 83 0 1008 23 67 0 0750 16 00 0 1011 23 83 0 0750 16.17 0 1010 24 00 0 0750 16 33 0 1011 24 17 0 0339 16 50 0 1011 24 33 0 0018 Hyd Int• 10 00 min Base Flow. Peak Time: 7 83 hrs Hyd Vol. 0 2512 acft MOVEHYD [BASIN M] TO [BASIN M - 6 mo] AS [6 mo] Peak Flow• 0.1921 cfs Peak Time: 8 00 hrs Hyd Vol: 2867 14 cf - 0.0658 acft MOVEHYD [BASIN M] TO [BASIN M - 100 yr] AS [100 yr] Peak Flow 0.7247 cfs Peak Time: 7.83 hrs Hyd Vol 10940.68 cf - 0 2512 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp. Multiple Orifice Start EI Max EI Increment 324.0000 ft 328 5000 ft 0.10 Infil: 10 00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE M Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 140 0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh 1 v Routing Method: Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh•1v Up Node Dn Node Up Invert Dn Invert DUMMY M 0 0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3 0000 ft 0 5000 ft 1.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Tnb Area Flow Capacity Velocity Normal Depth 0 8799 ac 1.1025 cf 1 1025 cf 1.4308 ft/s 0 1234 ft Ent Loss Exlt Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0 000000 ft 0 0000 ft ROUTEHYD (BASIN M - 6 mo] THRU [BIOSWALE M] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0 8799 0 1921 ---- 1 00 0 0569 Ditch 0 5681 ----- BASIN M ROUTEHYD (BASIN M - 100 yr] THRU [BIOSWALE M] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0 8799 0 7247 ---- 1 00 0 1234 Ditch 0 9308 ----- BASIN M Node ID: INFILTRATION M Desc Manhole structure Start EI 328.5000 ft Max EI 329.5000 ft Contnb Basin: Contnb Hyd. Length Width Void Ratio 140.0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN M RLP Desc: Manhole structure Start EI• 328.5000 ft Max EI. 329 5000 ft Contnb Basm. Contnb Hyd Storage Id: INFILTRATION M Discharge Id: INFILTRATION RLPCOMPUTE [BASIN M RLP] SUMMARY 100 yr MatchO=PeakQ= 0 7247 cfs Peak Out Q: 0.4783 cfs -Peak Stg: 329 49 ft - Active Vol. 1336 12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -M Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin M Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.31 IMPERVIOUS: 1.16 DEVELOPED LAND USE Basin Basin M Flows To Bio-Infiltration Swale M Groundwater: Yes ~'~,ti ~, Land Use Acres ~ ~ ^-. <~//r; OUTWASH GRASS: 1.31 /,J IMPERVIOUS: 1.16 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale M Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, ,.,o,. ~, .,,, e Depth: aft. Bottom Length: 140ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.019 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 ln. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 328.0 0.032 0.000 0.000 0.000 328.1 0.039 0.003 0.000 0.324 328.2 0.035 0.005 0.000 0.329 328.2 0.037 0.008 0.000 0.324 328.3 0.039 0.011 0.000 0.324 ,~gEPH Dq~~ eapwasWt ~O ~`P ~~~ co4_~ j.~5i5 ~ ~ AFC/STEK~'~~ ri` ,A ~~ 1~~~~a 09-~2-D5 IXPfftES• ! 1-22- 328.4 0.040 0.014 0.000 0.324 328.5 0.042 0.017 0.000 0.324 328.5 0.044 0.021 0.411 0.324 328.6 0.045 0.024 1.873 0.324 328.7 0.047 0.028 3.920 0.329 328.8 0.099 0.031 6.416 0.324 328.9 0.050 0.035 9.292 0.324 328.9 0.052 0.039 12.50 0.324 329.0 0.054 0.043 16.01 0.324 329.1 0.056 0.048 19.81 0.324 329.2 0.057 0.052 23.86 0.324 329.2 0.059 0.057 28.15 0.324 329.3 0.061 0.061 32.67 0.329 329.9 0.063 0.066 37.42 0.329 329.5 0.064 0.071 42.37 0.324 329.6 0.066 0.076 47.53 0.324 329.6 0.068 0.081 52.88 0.324 329.7 0.070 0.087 58.41 0.324 329.8 0.072 0.092 64.13 0.329 329.9 0.074 0.098 70.02 0.324 329.9 0.075 0.109 76.08 0.324 330.0 0.077 0.110 82.31 0.324 330.1 0.079 0.116 88.70 0.324 330.2 0.081 0.122 95.29 0.324 330.3 0.083 0.128 101.9 0.324 330.3 0.085 0.135 108.8 0.324 330.4 0.087 0.141 115.8 0.324 330.5 0.089 0.148 122.9 0.324 330.6 0.091 0.155 130.2 0.324 330.6 0.093 0.162 137.6 0.324 330.7 0.095 0.170 145.2 0.324 330.8 0.096 0.177 152.9 0.324 330.9 0.098 0.185 160.7 0.329 331.0 0.100 0.192 168.6 0.329 331.0 0.102 0.200 176.'1 0.329 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Predeveloped Flow (cfs) 0.292853 0.357773 0.398136 0.446964 0.482097 0.516377 Periods for Developed Unmitigated Flow (cfs) 0.292853 0.357773 0.398136 0.446964 0.482097 0.516377 Periods for Developed Mitigated Flow(cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.281 0.000 1957 0.447 0.093 1958 0.256 0.000 1959 0.298 0.000 1960 0.328 0.000 1961 0.221 0.000 1962 0.235 0.000 1963 0.484 0.051 1964 0.343 0.000 1965 0.325 0.000 1966 0.227 0.000 1967 0.283 0.000 1968 0.218 0.000 1969 0.215 0.000 1970 0.214 0.000 1971 0.267 0.000 1972 0.332 0.000 1973 0.252 0.000 1974 0.293 0.000 1975 0.254 0.000 1976 0.294 0.000 1977 0.371 0.000 1978 0.315 0.000 1979 0.375 0.000 1980 0.281 0.000 1981 0.323 0.000 1982 0.371 0.000 1983 0.398 0.023 1984 0.243 0.000 1985 0.281 0.000 1986 0.315 0.000 1987 0.346 0.000 1988 0.186 0.000 1989 0.223 0.000 1990 0.440 0.057 1991 0.463 0.061 1992 0.273 0.000 1993 0.200 0.000 1999 0.223 0.000 1995 0.322 0.000 1996 0.327 0.000 1997 0.264 0.000 1998 0.369 0.000 1999 0.317 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4635 0.0608 2 0.446? 0.0567 3 0.4901 0.0511 4 0.3977 0.0233 5 0.3747 0.0000 6 0.3715 0.0000 7 0.3705 0.0000 8 0.3692 0.0000 9 0.3459 0.0000 10 0.3430 0.0000 11 0.3318 0.0000 12 0.3280 0.0000 13 0.3271 0.0000 14 0.3252 0.0000 15 0.3227 0.0000 16 0.3223 0.0000 17 0.3171 0.0000 18 0.3152 0.0000 19 0.3198 0.0000 20 0.2980 0.0000 0.2941 0.0000 0.2935 0.0000 0.2829 0.0000 0.2811 0.0000 0.2810 0.0000 0.2806 0.0000 0.2733 0.0000 0.2669 0.0000 0.2635 0.0000 0.2560 0.0000 0.2542 0.0000 0.2520 0.0000 0.2934 0.0000 0.2354 0.0000 0.2266 0.0000 0.2225 0.0000 0.2225 0.0000 0.2210 0.0000 0.2178 0.0000 0.2146 0.0000 0.2143 0.0000 0.2003 0.0000 0.1860 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1464 1041 0 .0 Pass 0.1498 977 0 .0 Pass 0.1532 893 0 .0 Pass 0.1566 831 0 .0 Pass 0.1600 783 0 .0 Pass 0.1634 716 0 .0 Pass 0.1668 667 0 .0 Pass 0.1702 613 0 .0 Pass 0.1736 573 0 .0 Pass 0.1769 535 0 .0 Pass 0.1803 489 0 .0 Pass 0.1837 457 0 .0 Pass 0.1871 419 0 .0 Pass 0.1905 384 0 .0 Pass 0.1939 356 0 .0 Pass 0.1973 330 0 .0 Pass 0.2007 313 0 .0 Pass 0.2041 291 0 .0 Pass 0.2075 266 0 .0 Pass 0.2108 253 0 .0 Pass 0.2142 235 0 .0 Pass 0.2176 215 0 .0 Pass 0.2210 193 0 .0 Pass 0.2244 181 0 .0 Pass 0.2278 170 0 .0 Pass 0.2312 163 0 .0 Pass 0.2346 158 0 .0 Pass 0.2380 152 0 .0 Pass 0.2914 145 0 .0 Pass 0.2498 141 0 .0 Pass 0.2481 137 0 .0 Pass 0.2515 131 0 .0 Pass 0.2549 122 0 .0 Pass 0.2583 113 0 .0 Pass 0.2617 108 0 .0 Pass 0.2651 99 0 .0 Pass 0.2685 93 0 .0 Pass 0.2719 89 0 .0 Pass 0.2753 85 0 .0 Pass 0.2787 78 0 .0 Pass 0.2821 72 0 .0 Pass 0.2854 69 0 .0 Pass 0.2888 65 0 .0 Pass 0.2922 60 0 .0 Pass 0.2956 57 0 .0 Pass °0.2990 52 0 .0 Pass 0.3024 97 0 .0 Pass 0.3058 47 0 .0 Pass 0.3092 43 0 .0 Fass 0.3126 40 0 .0 Pass 0.3160 38 0 .0 Pass 0.3193 35 0 .0 Pass 0.3227 30 0 .0 Pass 0.3261 27 0 .0 Pass 0.3295 25 0 .0 Pass 0.3329 24 0 .0 Pass 0.3363 21 0 .0 Fass 0.3397 20 0 .0 Pass 0.3431 19 0 .0 Pass 0.3465 16 0 .0 Pass 0.3499 16 0 .0 Pass 0.3533 16 0 .0 Pass 0.3566 16 0 .0 Pass 0.3600 13 0 .0 Pass 0.3634 12 0 .0 Pass 0.3668 12 0 .0 Pass 0.3702 11 0 .0 Pass 0.3736 9 0 .0 Pass 0.3770 8 0 .0 Pass 0.3804 8 0 .0 Pass 0.3838 8 0 .0 Pass 0.3872 8 0 .0 Pass 0.3906 8 0 .0 Pass 0.3939 7 0 .0 Pass 0.3973 7 0 .0 Pass 0.4007 5 0 .0 Pass 0.4091 5 0 .0 Pass 0.9075 5 0 .0 Pass 0.9109 5 0 .0 Pass 0.4143 5 0 .0 Pass 0.9177 5 0 .0 Pass 0.4211 5 0 .0 Pass 0.4295 5 0 .0 Pass 0.4278 5 0 .0 Pass 0.4312 5 0 .0 Pass 0.4396 5 0 .0 Pass 0.9380 5 0 .0 Pass 0.4414 4 0 .0 Pass 0.4448 4 0 .0 Pass 0.4482 2 0 .0 Pass 0.4516 2 0 .0 Pass 0.4550 2 0 .0 Pass 0.4584 2 0 .0 Pass 0.9618 2 0 .0 Pass 0.4651 1 0 .0 Pass 0.4685 1 0 .0 Pass 0.4719 1 0 .0 Pass 0.4753 1 0 .0 Pass 0.4787 1 0 .0 Pass 0.4821 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.015 acre-feet On-line facility target flow: 0.09 cfs. Adjusted for 15 min: 0.1 cfs. Off-line facility target flow: 0.06 cfs. Adjusted £or 15 min: 0.07 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, ether expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 10.0 kkkXkkXkXkrkNYkStt~kkhkkkk}< .~., ~ 1.0 oa~oa>oooo000 Cl ~,a~ooooa~~~ LTf ~- o Predeveloped ,~ 10E-1 x Developed Mitigated v xx 1A k t~ t0E,2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probability 0 87 __ - -__ _ a Pred?utb~pesi - - - a o x Developed w~ Facility 072 .-, .,. ~ ...-. ,., _ ._ 0 57 - _ ~ _~ _ . _ , U ~,,. 0 ,~ _~ _ _ _ ~ ~.,~ _.. __ _ _ _ . 0 27 - ____ _ ~_ _ _ ~ _ ~ _ _ v to 1(~E•5 d 10E•d 10E•3 10E-2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph ifE AR FLOW ice) 100 1138 ~II~ r' > ~ 1 i i~~7 tE~ ' i' (( ~i~ ~~; 50 7701 - ; ~ ~ ~ r ~j ~j} n~ r 31~~ JS~SI jj( ij'i3 ;~3a ~ ~ ~ ' i 3 ]} 3 t j~ 55;~~ 73 10 2.~1 -._ ........_:. ~ 1 i 1 ~ ~ 9 5 1.518 - - ~~~E ~ ;~ early Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart e CLEARHIS BSN M1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN M1 0 08 7 83 BSN M1 0 14 7 83 BSN M1 0 22 7 83 BSN M1 0 27 7 83 BSN M1 0 29 7 83 BSN M1 0 31 7.83 yr Drainage Area: BSN M1 Hyd Method• SBUH Hyd Peak Factor: 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.1007 ac 78.00 Impervious 0.2843 ac 98.00 Total 0.3850 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type• Description Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN M2 Event Summary: BasmlD Peak Q Peak T Event ------- (cfs) (hrs) BSN M2 0 12 8 00 BSN M2 0 20 8 00 BSN M2 0 31 8 00 BSN M2 0 37 8 00 BSN M2 0 39 8 00 BSN M2 0 42 8 00 yr Drainage Area: BSN M2 Hyd Method. SBUH Hyd Peak Factor 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0586 ac 78 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0264 0 38 SBUH/SCS TYPEIA 6 mo 0 0461 0 38 SBUH/SCS TYPEIA 2 yr 0 0751 0 38 SBUH/SCS TYPEIA 10 yr 0 0900 0 38 SBUH/SCS TYPEIA 25 yr 0 0975 0 38 SBUH/SCS TYPEIA 50 yr 0 1051 0 38 SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs 0.20 Inty: 10 00 min TC 0.03 hrs 0.05 hrs 0 1007 ac 0 2099 ac 0 0285 ac 0 0459 ac Length: Slope: Coeff: Travel Time 6 00 ft 2 00% 0 2400 1 90 min Length• Slope Coeff: Travel Time 233 00 ft 1.66% 27.0000 1.12 min 18.50 ft 2 00% 0 0110 0.40 min 100.00 ft 0.50% 21 0000 1.12 mm 5.00 ft 2 00% 0 0110 0.14 mm 20.00 ft 2 00% 0 0110 0.42 min Peak Vol Area Method Ramtype (ac-ft) ac /Loss 0 0394 0 49 SBUH/SCS TYPE1A 6 mo 0 0669 0 49 SBUH/SCS TYPEIA 2 yr 0 1062 0 49 SBUHlSCS TYPEIA 10 yr 0 1261 0 49 SBUH/SCS TYPE1A 25 yr 0 1361 0 49 SBUH/SCS TYPEIA 50 yr 0 1461 0 49 SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs: 0.20 Intv: 10.00 min TC 0.03 hrs Impervious 0.4363 ac 98.00 0 10 hrs Total 0.4949 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0586 ac Impervious CN Data: ROADWAY 98.00 0.2625 ac SIDWALK 98.00 0 1164 ac DRIVEWAY 98.00 0 0574 ac Pervious TC Data: Flow type: Description. Length: Slope Coeff. Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description Length• Slope: Coeff Travel Time Shallow Along Flow Line of Gutter 212 00 ft 0 50% 27 0000 2 46 min Sheet Across Roadway 27 00 ft 2 00% 0 0110 0 54 min Channel Through Strom Water Pipe 238 00 ft 0 50% 21 0000 2 67 min Sheet Across Sidewalks 12.00 ft 2 00% 0 0110 0 28 min ADDHYD [BSN M1] AS [6 mo] [BSN M2] AS [6 mo] TO [BSN M1 +BSN M2] Peak Flow: 0.1921 cfs Peak Time: 8.00 hrs Hyd Vol. 2867.14 cf - 0.0658 acft ADDHYD [BSN M1] AS [2 yr] [BSN M2] AS [2 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 3271 cfs Peak Time: 8.00 hrs Hyd Vol: 4921 48 cf - 0 1130 acft ADDHYD [BSN M1] AS [10 yr] [BSN M2] AS [10 yr] TO [BSN M1 +BSN M2] Peak Flow: 0.5224 cfs Peak Time• 8 00 hrs Hyd Vol 7894 47 cf - 0.1812 acft ADDHYD (BSN M1] AS [25 yr] [BSN M2] AS [25 yr] TO [BSN M1 +BSN M2] Peak Flow 0.6229 cfs Peak Time 7 83 hrs Hyd Vol 9411.41 cf - 0.2161 acft ADDHYD [BSN M1] AS [50 yr] [BSN M2] AS [50 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 6737 cfs Peak Time• 7 83 hrs Hyd Vol• 10174.60 cf - 0 2336 acft ADDHYD [BSN M1] AS [100 yr] [BSN M2] AS [100 yr] TO [BSN M1 +BSN M2] Peak Flow: 0 7247 cfs Peak Time: 7.83 hrs Hyd Vol: 10940 68 cf - 0 2512 acft Hydrograph ID: BASIN M Area. 0 8799 ac Hyd Infi 10.00 min Base Flow. Peak Flow 0 7247 cfs Peak Time: 7 83 hrs Hyd Vol: 0.2512 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0024 8 67 0 3015 16 50 0 1011 0 83 0 0092 8 83 0 2579 16 67 0 1011 100 00171 900 02610 1683 01012 1.17 0 0261 9 17 0 2248 17 00 0 1012 1 33 0 0347 9 33 0 1945 17 17 0 0976 1 50 0 0405 9 50 0 1969 17 33 0 0944 1 67 0 0472 9 67 0 1854 17 50 0 0947 1 83 0 0532 9 83 0 1766 17 67 0 0946 2 00 0 0570 10 00 0 1774 17 83 0 0946 2 17 0 0624 10 17 0 1666 18 00 0 0947 2 33 0 0673 10 33 0 1575 18 17 0 0910 2 50 0 0699 10 50 0 1583 18 33 0 0878 2 67 0 0722 10 67 0 1510 18 50 0 0881 2 83 0 0741 10 83 0 1449 18 67 0 0880 3 00 0 0757 3 17 0 0772 3 33 0 0785 3 50 0 0796 3 67 0 0832 3.83 0 0867 4 00 0 0875 4 17 0 0938 4 33 0 0997 4 50 0 1003 4 67 0 1067 4 83 0.1128 5 00 0 1139 5 17 0 1209 5 33 0 1274 5 50 0 1284 5 67 0 1356 5 83 0 1422 6 00 0 1431 6 17 0 1565 6 33 0 1689 6 50 0 1696 6 67 0 1899 6 83 0 2084 7 00 0 2091 7 17 0 2334 7 33 0 2554 7 50 0 2561 7 67 0 5000 7.83 0 7247 8 00 0 7215 8 17 0 5287 8 33 0 3456 8 50 0 3597 Hydrograph ID: BASIN M Area 0.8799 ac Peak Flow. 0 7247 cfs 11 00 0 1455 18 83 0 0881 11 17 0 1418 19 00 0 0881 11 33 0 1389 19 17 0 0844 11 50 0 1392 19 33 0 0812 11 67 0 1356 19 50 0 0815 11 83 0 1326 19 67 0 0813 12 00 0 1329 19 83 0 0814 12 17 0 1293 20 00 0 0814 12 33 0 1262 20 17 0 0814 12 50 0.1265 20 33 0 0815 12 67 0 1229 20 50 0 0815 12 83 0 1198 20 67 0 0815 13 00 0 1201 20 83 0 0815 13 17 0 1201 21 00 0 0815 13 33 0 1202 21 17 0 0816 13 50 0 1202 21 33 0 0816 13 67 0 1167 21 50 0 0816 13 83 0 1136 21 67 0 0816 14 00 0 1139 21 83 0 0816 14 17 0 1138 22 00 0.0817 14 33 0 1139 22 17 0 0779 14 50 0 1139 22 33 0 0747 14 67 0 1104 22 50 0 0750 14 83 0 1072 22 67 0 0749 15 00 0 1075 22 83 0 0749 15 17 0 1074 23 00 0 0749 15 33 0 1075 23 17 0 0750 15 50 0 1076 23 33 0 0750 15 67 0 1039 23 50 0 0750 15 83 0 1008 23 67 0 0750 16 00 0 1011 23 83 0 0750 16 17 0.1010 24 00 0 0750 16 33 0.1011 24.17 0 0339 16 50 0 1011 24 33 0 0018 Hyd Int• 10.00 min Base Flow• Peak Time 7 83 hrs Hyd Vol: 0 2512 acft MOVEHYD [BASIN M] TO [BASIN M - 6 mo] AS [6 mo] Peak Flow: 0.1921 cfs Peak Time: 8.00 hrs Hyd Vol. 2867.14 cf - 0.0658 acft MOVEHYD [BASIN M] TO [BASIN M - 100 yr] AS [100 yr] Peak Flow 0.7247 cfs Peak Time 7 83 hrs Hyd Vol: 10940 68 cf - 0.2512 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 324.0000 ft 328.5000 ft 0.10 Infd• 10.00 in/hr Multiplier. 1.00 Reach ID: BIOSWALE M Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 140.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh 1 v Routing Method: Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3.OOh:1 v 0 Up Node Dn Node Up Invert Dn Invert DUMMY M 0 0000 ft 0 0000 ft Conduit Cons traints: Mm Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1 0000 ft 3.0000 ft 0.5000 ft 1.0000 ft 0 0000 ft In/Exfll Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Tnb Area Flow Capacity Velocity Normal Depth 0 8799 ac 1.1025 cf 1.1025 cf 1 4308 ft/s 0 1234 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN M - 6 mo] THRU [BIOSWALE M] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0 8799 0 1921 ---- 1.00 0 0569 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN M -100 yr] THRU [BIOSWALE M] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 0.8799 0 7247 ---- 1 00 0 1234 Ditch 0 9308 ----- BASIN M Node ID: INFILTRATION M Desc: Manhole structure Start EI: 328.5000 ft Max EI: 329.5000 ft Contrib Basin: Contrlb Hyd• Length Width Void Ratlo 140.0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN M RLP Desc: Manhole structure Start EI. 328.5000 ft Max EI• 329.5000 ft Contrlb Basin: Contrib Hyd Storage Id: INFILTRATION M Discharge Id: INFILTRATION RLPCOMPUTE [BASIN M RLP] SUMMARY 100 yr MatchQ=PeakQ= 0.7247 cfs Peak Out O 0 4783 cfs -Peak Stg: 329.49 ft - Active Vol 1336.12 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -L Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Preca.p Scale: 0.80 PREDEVELOPED LAND USE Basin Basin L Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 DEVELOPED LAND USE Basin Basin L Flows To Bio-Infiltration Swale L Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale L Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. T1~ mcnci nnc Depth: aft. Bottom Length: 200ft. Bottom Width 12ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0 ft. Riser Diameter: 0 in. 0.000 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Zn£ilt(cfs) 328.0 0.055 0.000 0.000 0.000 328.1 0.057 0.009 0.000 0.111 328.2 0.060 0.009 0.000 0.111 328.2 0.062 0.014 0.000 0.111 328.3 0.064 0.019 0.000 0.111 cd3 ~~ ~~ c> r~ C~ LT~' n $ r ~ ~~ - ~~~~- ~Og-ZZ~06 IXPIRES. i1-~2- ~..~. 328.4 0.067 0.024 0.000 0.117. 328.5 0.069 0.029 0.000 0.111 328.5 0.071 0.034 0.000 0.111 328.6 0.074 0.040 0.000 0.111 328.7 0.076 0.046 0.000 0.111 328.8 0.078 0.052 0.000 0.111 328.9 0.081 0.058 0.000 0.111 328.9 0.083 0.064 0.000 0.111 329.0 0.085 0.071 0.000 0.111 329.1 0.088 0.078 0.000 0.111 329.2 0.090 0.085 0.000 0.111 329.2 0.093 0.092 0.000 0.111 329.3 0.095 0.099 0.000 0.111 329.4 0.098 0.107 0.000 0.111 329.5 0.100 0.114 0.000 0.111 329.6 0.103 0.122 0.000 0.111 329.6 0.105 0.130 0.000 0.111 329.7 0.107 0.138 0.000 0.111 329.8 0.110 0.147 0.000 0.111 329.9 0.112 0.156 0.000 0.111 329.9 0.115 0.164 0.000 0.111 330.0 0.118 0.173 0.000 0.111 330.1 0.120 0.183 0.000 0.111 330.2 0.123 0.192 0.000 0.111 330.3 0.125 0.202 0.000 0.111 330.3 0.128 0.212 0.000 0.111 330.4 0.130 0.222 0.000 0.111 330.5 0.133 0.232 0.000 0.111 330.6 0.135 0.242 0.000 0.111 330.6 0.138 0.253 0.000 0.111 330.7 0.141 0.264 0.000 0.111 330.8 0.143 0.275 0.000 0.111 330.9 0.146 0.286 0.000 0.111 331.0 0.149 0.297 0.000 0.111 331.0 0.151 0.309 0.000 0.111 ANALYSIS RESULTS Flow Frequency Return Pera.ods for Predeveloped Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Unmitigated Flow (efs) 0.328599 0.398524 0.441759 0.49385 0.531201 0.56755 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed '1956 0.303 0.000 1957 0.503 0.000 1958 0.289 0.000 1959 0.339 0.000 1960 0.373 0.000 1961 0.244 0.000 1962 0.268 0.000 1963 0.519 0.000 1964 0.390 0.000 1965 0.361 0.000 1966 0.258 0.000 1967 0.305 0.000 1968 0.246 0.000 1969 0.244 0.000 1970 0.244 0.000 1971 0.302 0.000 1972 0.339 0.000 1973 0.287 0.000 1979 0.334 0.000 1975 0.289 0.000 1976 0.331 0.000 1977 0.421 0.000 1978 0.358 0.000 1979 0.426 0.000 1980 0.320 0.000 1981 0.364 0.000 1982 0.423 0.000 1983 0.452 0.000 1984 0.275 0.000 1985 0.319 0.000 1986 0.351 0.000 1987 0.363 0.000 1988 0.212 0.000 1989 0.253 0.000 1990 0.495 0.000 1991 0.472 0.000 1992 0.311 0.000 1993 0.228 0.000 1994 0.253 0.000 1995 0.367 0.000 1996 0.372 0.000 1997 0.300 0.000 1998 0.420 0.000 1999 0.361 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5028 0.0000 2 0.4954 0.0000 3 0.4719 0.0000 4 0.4524 0.0000 5 0.4263 0.0000 6 0.4226 0.0000 7 0.4214 0.0000 8 0.9200 0.0000 9 0.3903 0.0000 10 0.3731 0.0000 11 0.3721 0.0000 12 0.3667 0.0000 13 0.3636 0.0000 14 0.3639 0.0000 15 0.3611 0.0000 16 0.3608 0.0000 17 0.3581 0.0000 18 0.3507 0.0000 19 0.3390 0.0000 20 0.3385 0.0000 0.3338 0.0000 0.3310 0.0000 0.3197 0.0000 0.3193 0.0000 0.3109 0.0000 0.3098 0.0000 0.3025 0.0000 0.3019 0.0000 0.2998 0.0000 0.2892 0.0000 0.2888 0.0000 0.2867 0.0000 0.2747 0.0000 0.2678 0.0000 0.2579 0.0000 0.2532 0.0000 0.2532 0.0000 0.2461 0.0000 0.2942 0.0000 0.2441 0.0000 0.2938 0.0000 0.2278 0.0000 0.2116 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1643 1062 0 .0 Pass 0.1680 994 0 .0 Pass 0.1717 941 0 .0 Pass 0.1759 862 0 .0 Pass 0.1791 798 0 .0 Pass 0.1828 748 0 .0 Pass 0.1865 688 0 .0 Pass 0.1902 635 0 .0 Pass 0.1939 602 0 .0 Pass 0.1977 556 0 .0 Pass 0.2014 512 0 .0 Pass 0.2051 476 0 .0 Pass 0.2088 447 0 .0 Pass 0.2125 413 0 .0 Pass 0.2162 375 0 .0 Pass 0.2199 349 0 .0 Pass 0.2236 324 0 .0 Pass 0.2273 306 0 .0 Pass 0.2310 288 0 .0 Pass 0.2347 270 0 .0 Pass 0.2384 245 0 .0 Pass 0.2421 227 0 .0 Pass 0.2458 216 0 .0 Pass 0.2495 197 0 .0 Pass 0.2532 187 0 .0 Pass 0.2570 174 0 .0 Pass 0.2607 167 0 .0 Pass 0.2644 160 0 .0 Pass 0.2681 151 0 .0 Pass 0.2718 149 0 .0 Pass 0.2755 142 0 .0 Pass 0.2792 136 0 .0 Pass 0.2829 132 0 .0 Pass 0.2866 119 0 .0 Pass 0.2903 112 0 .0 Pass 0.2990 107 0 .0 Pass 0.2977 100 0 .0 Pass 0.3014 92 0 .0 Pass 0.3051 85 0 .0 Pass 0.3088 80 0 .0 Pass 0.3125 76 0 .0 Pass 0.3162 70 0 .0 Pass 0.3200 68 0 .0 Pass 0.3237 65 0 .0 Pass 0.3274 60 0 .0 Pass 0.3311 54 0 .0 Pass 0.3348 52 0 .0 Pass 0.3385 51 0 .0 Pass 0.3422 44 0 .0 Pass 0.3459 43 0 .0 Pass 0.3496 40 0 .0 Pass 0.3533 36 0 .0 Pass 0.3570 35 0 .0 Pass 0.3607 33 0 .0 Pass 0.3644 27 0 .0 Pass 0.3681 24 0 .0 Pass 0.3718 24 0 .0 Pass 0.3755 22 0 .0 Fass 0.3793 21 0 .0 Pass 0.3830 19 0 .0 Pass 0.3867 19 0 .0 Pass 0.3904 17 0 .0 Pass 0.3941 16 0 .0 Pass 0.3978 16 0 .0 Pass 0.4015 15 0 .0 Pass 0.4052 15 0 .0 Pass 0.4089 14 0 .0 Pass 0.9126 12 0 .0 Pass 0.4163 12 0 .0 Pass 0.4200 12 0 .0 Pass 0.4237 9 0 .0 Pass 0.4274 7 0 .0 Pass 0.4311 7 0 .0 Pass 0.4348 7 0 .0 Pass 0.4385 7 0 .0 Pass 0.4423 6 0 .0 Pass 0.4460 6 0 .0 Pass 0.4497 6 0 .0 Pass 0.4534 5 0 .0 Pass 0.9571 5 0 .0 Pass 0.4608 5 0 .0 Pass 0.4645 5 0 .0 Pass 0.4682 5 0 .0 Pass 0.4719 5 0 .0 Pass 0.4756 4 0 .0 Pass 0.4793 4 0 .0 Pass 0.4830 4 0 .0 Pass 0.4867 4 0 .0 Pass 0.4904 4 0 .0 Pass 0.4941 4 0 .0 Pass 0.4978 3 0 .0 Pass 0.5016 2 0 .0 Pass 0.5053 1 0 .0 Pass 0.5090 1 0 .0 Pass 0.5127 1 0 .0 Pass 0.5164 1 0 .0 Pass 0.5201 0 0 .0 Pass 0.5238 0 0 .0 Pass 0.5275 0 0 .0 Pass 0.5312 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.172 acre-feet On-la.ne facility target flow: 0.16 cfs. Adjusted for 15 m~.n: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 aun: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without lim~tatLOn to damages for loss of busrness profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEAR FLOPJ (cfs) 100 4500 _~____ 1Q0 kkxrxx~xx~xx~coxw~~xxMxxxk 50 ' 4301 ~ "" ~~~~~~, ,~ ' 25 ~ 3895 ' `' ,t~ 10 ~ _3463 ~° .. . - - -° i ~ 1.0 ,.., 5 311 ] ~--- ' ° ~ o~o~~~~'0'o Predsveloped 2 X551 ; ' ; ~ ~ ,~ 18E-1 x Devebpe~tditigated „~ ~ ~~ ' ~ ~ I ' ' ~ ' ~ , i ~ ~ 70E,2 ~' ~ ~ 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probability Yearly Peaks for Predeveloped Flow Frequency Chart ~ o Predevebped ~ x Developed w~ Facility 835 .....~ _.... ~ .. , ~ . ~ 0 27 v- t3 `r' 0 20 _ _ _ _ _~ Qt ~ 018 ___ _ _ _ _ ~_ _ _ ~ _ a t) to O 10E•5 ~ 10E-4 10E-3 10E~2 18E•1 1 10 percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph TEAR FLOW (cIs) 180 __ j 1138 ' ~ , i ~ , 50 i , :t? 3 f `~ t 7 701 ~.. _ f ~ ~ s , t3 ~ 3 ' ' 25 r ~ ~ z i.`3 ° ~> 5 845 ~° t ; ~ ~ ~ ! r ~ ~ 18 i~ ~~ 26$1 _.__..~....~..~.~~.~....~.. ~ i 5 1 1 5 8 ~j ~j, , ~ ~ s , it 11~SIi i v ~ ~ ry L ~ [p ...V. .5453 'early Peaks for Developed W/Pond CLEARHIS BSN L1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L1 0.05 7 83 BSN L1 0 08 7 83 BSN L1 0 13 7 83 BSN L1 0 15 7 83 BSN L1 0 17 7 83 BSN L1 0 18 7 83 yr Drainage Area: BSN L1 Hyd Method SBUH Hyd Peak Factor: 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0330 ac 78.00 Impervious 0 1676 ac 98.00 Total 0.2006 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN L2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L2 0 19 8 00 BSN L2 0 32 8 00 BSN L2 0 51 8 00 BSN L2 0 60 8 00 BSN L2 0 65 8 00 BSN L2 0 70 8 00 yr Drainage Area: BSN L2 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur 24.00 hrs Area CN Pervious 0.1093 ac 78 00 Impervious 0.7272 ac 98 00 Peak Vol Area (ac-ft) ac 0 0153 0 20 0 0261 0 20 0 0418 0 20 0 0498 0 20 0 0538 0 20 0 0578 0 20 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPE1A 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs~ 0.20 Intv 10.00 min TC 0.03 hrs 0 03 hrs 0.0330 ac 0.1213 ac 0 0463 ac Length Slope Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length: Slope. Coeff. Travel Time 137 00 ft 3 60% 27 0000 0 45 min 18 50 ft 2 00% 0 0110 0.40 min 50.00 ft 0 50% 21.0000 0.56 min 5.OOft 200% 00110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0658 0 84 SBUH/SCS TYPE1A 6 mo 0 1119 0 84 SBUH/SCS TYPEIA 2 yr 0 1780 0 84 SBUH/SCS TYPE1A 10 yr 0 2116 0 84 SBUH/SCS TYPEIA 25 yr 0 2284 0 84 SBUH/SCS TYPEIA 50 yr 0 2453 0 84 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs 0.20 Intv. 10.00 min TC 0 03 hrs 0 13 hrs Total 0.8365 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.1093 ac Impervious CN Data: ROADWAY 98 00 0 5053 ac SIDWALK 98 00 0 2219 ac Pervious TC Data: Flow type• Descnption• Length. Slope Coeff Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type. Description: Length• Slope Coeff: Travel Time Shallow Along Flow Line of Gutter 400 00 ft 0 85% 27 0000 2.68 min Sheet Across Roadway 27.00 ft 2.00% 0.0110 0.54 min Channel Through Strom Water Pipe 400.00 ft 0.50% 21 0000 4 49 mm Sheet Across Sidewalks 12.00 ft 2 00% 0 0110 0 28 min BSN L3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN L3 0 13 8 00 0 0439 0 53 SBUH/SCS TYPEIA 6 mo BSN L3 0 22 8 00 0 0741 0 53 SBUH/SCS TYPEIA 2 yr BSN L3 0 34 7 83 0 1170 0 53 SBUH/SCS TYPE1A 10 yr BSN L3 0 41 7 83 0 1387 0 53 SBUH/SCS TYPEIA 25 yr BSN L3 0 44 7 83 0 1496 0 53 SBUH/SCS TYPEIA 50 yr BSN L3 0 47 7 83 0 1605 0 53 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN L3 Hyd Method. SBUH Hyd Peak Factor 484.00 Storm Dur 24.00 hrs Area CN Pervious 0.0445 ac 78 00 Impervious 0.4891 ac 98 00 Total 0.5336 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 Pervious TC Data: Flow type' Description. Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method SCS CN Number SCS Abs: 0.20 Intv: 10 00 min TC 0.03 hrs 0.08 hrs 0.0445 ac 0 3883 ac 0 1008 ac Length• Slope: Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length. Slope Coeff Travel Time 252 00 ft 0 50% 27.0000 2 92 min 27 00 ft 2.00% 0 0110 0 54 min 80 00 ft 0.50% 21 0000 0 90 min 1200 ft 200% 00110 028 min ADDHYD [BSN L1] AS [6 mo] [BSN L2] AS [6 mo] TO [BSN L1 +BSN L2] Peak Flow. 0.2336 cfs Peak Time: 8 00 hrs Hyd Vol 3530.83 cf - 0.0811 acft ADDHYD [BSN L1] AS [2 yr] [BSN L2] AS [2 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.3947 cfs Peak Time. 8.00 hrs Hyd Vol: 6013.36 cf - 0.1380 acft ADDHYD [BSN L1] AS [10 yr] [BSN L2] AS [10 yr] TO [BSN L1 +BSN L2] Peak Flow• 0 6246 cfs Peak Time: 8 00 hrs Hyd Vol. 9574 92 cf - 0 2198 acft ADDHYD [BSN L1] AS [25 yr] [BSN L2] AS [25 yr] TO [BSN L1 +BSN L2] Peak Flow 0.7407 cfs Peak Time 8 00 hrs Hyd Vol• 11384 07 cf - 0 2613 acft ADDHYD [BSN L1] AS [50 yr] [BSN L2] AS [50 yr] TO [BSN L1 +BSN L2] Peak Flow: 0 7990 cfs Peak Time: 8 00 hrs Hyd Vol: 12293 08 cf - 0 2822 acft ADDHYD [BSN L1] AS [100 yr] [BSN L2] AS [100 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.8574 cfs Peak Time 8.00 hrs Hyd Vol 13204.63 cf - 0.3031 acft MOVEHYD [BSN L3] TO [BSN L3 - 6 mo] AS [6 mo] Peak Flow: 0 1312 cfs Peak Time: 8.00 hrs Hyd Vol: 1912.47 cf - 0 0439 acft MOVEHYD [BSN L3] TO [BSN L3 - 2 yr] AS [2 yr] Peak Flow• 0.2190 cfs Peak Time: 8 00 hrs Hyd Vol 3228.35 cf - 0.0741 acft MOVEHYD [BSN L3] TO [BSN L3 - 10 yr] AS [10 yr] Peak Flow 0.3436 cfs Peak Time: 7.83 hrs Hyd Vol: 5097 27 cf - 0.1170 acft MOVEHYD [BSN L3] TO [BSN L3 - 25 yr] AS [25 yr] Peak Flow: 0 4064 cfs Peak Time 7.83 hrs Hyd Vol 6041.61 cf - 0.1387 acft MOVEHYD [BSN L3] TO [BSN L3 - 50 yr] AS [50 yr] Peak Flow: 0.4378 cfs Peak Time• 7.83 hrs Hyd Vol: 6515 20 cf - 0.1496 acft MOVEHYD [BSN L3] TO [BSN L3 -100 yr] AS [100 yr] Peak Flow: 0.4693 cfs Peak Time: 7 83 hrs Hyd Vol. 6989.58 cf - 0.1605 acft ADDHYD [BSN L1 +BSN L2] AS [6 mo] [BSN L3] AS [6 mo] TO [BSN L1 +BSN L2 +BSN L3) Peak Flow: 0 3648 cfs Peak Time. 8.00 hrs Hyd Vol• 5443 3 cf - 0 1250 acft ADDHYD [BSN L1 +BSN L2] AS [2 yr] [BSN L3] AS [2 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 0.6137 cfs Peak Time. 8.00 hrs Hyd Vol: 9241.71 cf - 0.2121 acft ADDHYD [BSN L1 +BSN L2] AS [10 yr] [BSN L3] AS [10 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 0 9682 cfs Peak Time 8 00 hrs Hyd Vol 14672 19 cf - 0 3368 acft ADDHYD [BSN L1 +BSN L2] AS [25 yr] [BSN L3] AS [25 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow. 1.1471 cfs Peak Time 8.00 hrs Hyd Vol: 17425 68 cf - 0 3783 acft ADDHYD [BSN L1 +BSN L2] AS [50 yr] [BSN L3] AS [50 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow• 1 2368 cfs Peak Time: 8.00 hrs Hyd Vol• 18808 28 cf - 0.4318 acft ADDHYD [BSN L1 +BSN L2] AS [100 yr] [BSN L3] AS [100 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 1 3231 cfs Peak Time. 8 00 hrs Hyd Vol. 20194.22 cf - 0.4636 acft Hydrograph ID: BASIN L Area 1 5707 ac Hyd Int 10 00 mm Base Flow: Peak Flow: 1.3231 cfs Peak Time• 8.00 hrs Hyd Vol: 0.4636 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0042 8 83 0 4862 16 83 0 1836 0 83 0 0165 9 00 0 4808 17 00 0 1837 1 00 0 0313 9 17 0 4187 17 17 0.1776 1 17 0 0483 9 33 0 3639 17 33 0 1720 1.33 0 0648 9 50 0 3624 17 50 0 1719 1.50 0.0764 9 67 0 3415 17 67 0 1716 1 67 0 0893 9 83 0 3258 17.83 0 1717 1 83 0 1008 10 00 0 3251 18 00 0 1716 2 00 0 1085 10 17 0 3066 18 17 0 1656 2.17 0 1187 10 33 0 2902 18 33 0 1599 2 33 0 1282 10 50 0.2899 18 50 0 1599 2 50 0 1335 10 67 0.2771 18 67 0 1595 2 67 0 1380 10 83 0 2663 18 83 0 1596 2 83 0 1418 11 00 0 2661 19 00 0 1596 3 00 0 1451 11 17 0 2596 19 17 0 1535 3 17 0 1479 11 33 0 2543 19 33 0 1478 3 33 0 1504 11 50 0 2542 19 50 0 1478 3 50 0 1526 11 67 0 2480 19 67 0 1474 3 67 0.1593 11 83 0 2426 19 83 0 1475 3 83 0 1657 12 00 0 2425 20 00 0 1475 4 00 0 1677 12 17 0 2363 20 17 0 1475 4 17 0 1791 12 33 0 2308 20 33 0 1475 4 33 0 1901 12 50 0 2308 20 50 0 1476 4 50 0 1922 12 67 0 2245 20 67 0 1476 4 67 0 2039 12 83 0 2190 20 83 0 1476 4 83 0 2150 13 00 0 2189 21 00 0.1476 5 00 0 2177 13.17 0 2187 21 17 0 1477 5 17 0 2301 13 33 0 2188 21 33 0 1477 5 33 0 2418 13 50 0.2189 21 50 0 1477 5 50 0 2443 13 67 0 2129 21 67 0 1477 5 67 0 2568 13 83 0 2074 21 83 0 1478 5 83 0 2686 14 00 0 2073 22 00 0 1478 6 00 0 2709 14 17 0.2070 22 17 0 1416 6 17 0 2943 14 33 0 2072 22 33 0.1360 6 33 0 3165 14 50 0 2072 22 50 0 1359 6 50 0 3194 14 67 0 2012 22 67 0 1355 6 67 0 3547 14 83 0 1956 22 83 0 1356 6 83 0 3878 15 00 0 1956 23 00 0 1356 7 00 0 3915 15 17 0 1953 23 17 0 1356 7 17 0 4339 15 33 0 1954 23 33 0 1356 7 33 0 4729 15 50 0 1954 23 50 0 1356 7 50 0 4771 15 67 0 1894 23 67 0 1357 7.67 0 8947 15 83 0 1838 23 83 0 1357 7 83 1 2958 16 00 0 1837 24 00 0 1357 8 00 1 3231 16 17 0 1834 24 17 0 0676 8 17 1 0054 16 33 0 1835 24 33 0 0091 8 33 0 6764 16 50 0 1835 24 50 0 0021 8 50 0 6718 16 67 0 1836 24 67 0 0005 8 67 0.5632 16 83 0 1836 24 83 0 0001 Area 1.5707 ac Hyd Int: 10.00 min Base Flow MOVEHYD [BASIN L] TO (BASIN L - 6 mo] AS [6 mo] Peak Flow. 0.3648 cfs Peak Time 8 00 hrs Hyd Vol. 5443 3 cf - 0 1250 acft MOVEHYD (BASIN L] TO [BASIN L - 100 yr] AS [100 yr] Peak Flow: 1 3231 cfs Peak Time• 8 00 hrs Hyd Vol• 20194.22 cf - 0.4636 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip~ Bottom and Sides Start EI Max EI Increment 324.0000 ft 328.0000 ft 0.10 Infil: 10.00 in/hr Multiplier 1.00 Reach ID: BIOSWALE L Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 12 0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY M 0.0000 ft Routing Method Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh 1 v Dn Invert 0 0000 ft ROUTEHYD [BASIN L - 6 mo] THRU [BIOSWALE L] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 1 5707 0 3648 ---- 1 00 0 0969 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN L - 100 yr] THRU [BIOSWALE L] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE L 1 5707 1 3231 ---- 1 00 0 2234 Ditch 0 8964 ----- BASIN L Node ID: INFILTRATION L Desc. Bottom and Sides Start EI: 324.0000 ft Max EI: 329.0000 ft Contrib Basin: Contrib Hyd. Length Width Void Ratio 200.0000 ft 12 0000 ft 39 00 Bottom area only with infiltration COMPUTE [BASIN L] SUMMARY 100 yr MatchQ=PeakQ= 1.3231 cfs Peak Out O. 0 8732 cfs -Peak Stg: 330 49 ft -Active Vol: 2465.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -L Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin L Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 DEVELOPED LAND USE Basin Basin L Flows To Bio-Infiltration Swale L Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale L Pond Type: Trapezoldal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. T]i manci nns Depth: aft. Bottom Length: 200ft. Bottom Width 12ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.000 acre-ft. Discharge Structure Riser Height: 0 ft. Riser Diameter: 0 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 328.0 0.055 0.000 0.000 0.000 328.1 0.057 0.004 0.000 0.111 328.2 0.060 0.009 0.000 0.111 328.2 0.062 0.014 0.000 0.111 3?_8.3 0.064 0.019 0.000 0.111 ~~~: ~=~-, G" ~~~~ 3 b i~ Fxe~x~s ~)-z2 328.4 0.067 0.024 0.000 0.111 328.5 0.069 0.029 0.000 0.111 328.5 0.071 0.034 0.000 0.111 328.6 0.074 0.040 0.000 0.111 328.7 0.076 0.046 0.000 0.111 328.8 0.078 0.052 0.000 0.111 328.9 0.081 0.058 0.000 0.111 328.9 0.083 0.064 0.000 0.111 329.0 0.085 0.071 0.000 0.17.1 329.1 0.088 0.078 0.000 0.111 329.2 0.090 0.085 0.000 0.111 329.2 0.093 0.092 0.000 0.111 329.3 0.095 0.099 0.000 0.711 329.4 0.098 0.107 0.000 0.111 329.5 0.100 0.119 0.000 0.111 329.6 0.103 0.122 0.000 0.111 329.6 0.105 0.130 0.000 0.111 329.7 0.107 0.138 0.000 0.111 329.8 0.110 0.147 0.000 0.111 329.9 0.112 0.156 0.000 0.111 329.9 0.115 0.164 0.000 0.111 330.0 0.118 0.173 0.000 0.111 330.1 0.120 0.183 0.000 0.111 330.2 0.123 0.192 0.000 0.111 330.3 0.125 0.202 0.000 0.111 330.3 0.128 0.212 0.000 0.111 330.4 0.130 0.222 0.000 0.111 330.5 0.133 0.232 0.000 0.111 330.6 0.135 0.242 0.000 0.111 330.6 0.138 0.253 0.000 0.111 330.7 0.141 0.264 0.000 0.111 330.8 0.143 0.275 0.000 0.111 330.9 0.196 0.286 0.000 0.111 331.0 0.199 0.297 0.000 0.111 331.0 0.151 0.309 0.000 0.111 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.303 0.000 1957 0.503 0.000 1958 0.289 0.000 1959 0.339 0.000 1960 0.373 0.000 1961 0.244 0.000 1962 0.268 0.000 1963 0.519 0.000 1969 0.390 0.000 1965 0.361 0.000 1966 0.258 0.000 1967 0.305 0.000 1968 0.246 0.000 1969 0.244 0.000 1970 0.244 0.000 1971 0.302 0.000 1972 0.339 0.000 1973 0.287 0.000 1974 0.334 0.000 1975 0.289 0.000 1976 0.331 0.000 1977 0.421 0.000 1978 0.358 0.000 1979 0.426 0.000 1980 0.320 0.000 1981 0.364 0.000 1982 0.423 0.000 1983 0.452 0.000 1989 0.275 0.000 1985 0.319 0.000 1986 0.351 0.000 1987 0.363 0.000 1988 0.212 0.000 1989 0.253 0.000 1990 0.995 0.000 1991 0.472 0.000 1992 0.311 0.000 1993 0.228 0.000 1994 0.253 0.000 1995 0.367 0.000 1996 0.372 0.000 1997 0.300 0.000 1998 0.420 0.000 1999 0.361 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5028 0.0000 2 0.4959 0.0000 3 0.4719 0.0000 4 0.4524 0.0000 5 0.4263 0.0000 6 0.4226 0.0000 7 0.4219 0.0000 8 0.4200 0.0000 9 0.3903 0.0000 10 0.3731 0.0000 11 0.3721 0.0000 12 0.3667 0.0000 13 0.3636 0.0000 14 0.3634 0.0000 15 0.3611 0.0000 16 0.3608 0.0000 17 0.3581 0.0000 18 0.3507 0.0000 19 0.3390 0.0000 20 0.3385 0.0000 0.3338 0.0000 0.3310 0.0000 0.3197 0.0000 0.3193 0.0000 0.3109 0.0000 0.3048 0.0000 0.3025 0.0000 0.3019 0.0000 0.2998 0.0000 0.2892 0.0000 0.2888 0.0000 0.2867 0.0000 0.2747 0.0000 0.2678 0.0000 0.2579 0.0000 0.2532 0.0000 0.2532 0.0000 0.2461 0.0000 0.2442 0.0000 0.2941 0.0000 0.2938 0.0000 0.2278 0.0000 0.2116 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1693 1062 0 .0 Pass 0.1680 994 0 .0 Pass 0.1717 941 0 .0 Pass 0.1754 862 0 .0 Pass 0.1791 798 0 .0 Pass 0.1828 748 0 .0 Pass 0.1865 688 0 .0 Pass 0.1902 635 0 .0 Pass 0.1939 602 0 .0 Pass 0.1977 556 0 .0 Pass 0.2014 512 0 .0 Pass 0.2051 476 0 .0 Pass 0.2088 447 0 .0 Pass 0.2125 413 0 .0 Pass 0.2162 375 0 .0 Pass 0.2199 349 0 .0 Pass 0.2236 324 0 .0 Pass 0.2273 306 0 .0 Pass 0.2310 288 0 .0 Pass 0.2347 270 0 .0 Pass 0.2384 245 0 .0 Pass 0.2421 227 0 .0 Pass 0.2458 216 0 .0 Pass 0.2495 197 0 .0 Pass 0.2532 187 0 .0 Pass 0.2570 174 0 .0 Pass 0.2607 167 0 .0 Pass 0.2644 160 0 .0 Pass 0.2681 151 0 .0 Pass 0.2718 144 0 .0 Pass 0.2755 142 0 .0 Pass 0.2792 136 0 .0 Pass 0.2829 132 0 .0 Pass 0.2866 119 0 .0 Pass 0.2903 112 0 .0 Pass 0.2990 107 0 .0 Pass 0.2977 100 0 .0 Pass 0.3014 92 0 .0 Pass 0.3051 85 0 .0 Pass 0.3088 80 0 .0 Pass 0.3125 76 0 .0 Pass 0.3162 70 0 .0 Pass 0.3200 68 0 .0 Pass 0.3237 65 0 .0 Pass 0.3274 60 0 .0 Pass 0.3311 54 0 .0 Pass 0.3348 52 0 .0 Pass 0.3385 51 0 .0 Pass 0.3922 44 0 .0 Pass 0.3459 43 0 .0 Pass 0.3496 40 0 .0 Pass 0.3533 36 0 .0 Pass 0.3570 35 0 .0 Pass 0.3607 33 0 .0 Pass 0.3644 27 0 .0 Pass 0.3681 24 0 .0 Pass 0.3718 24 0 .0 Pass 0.3755 22 0 .0 Pass 0.3793 21 0 .0 Pass 0.3830 19 0 .0 Pass 0.3867 19 0 .0 Pass 0.3904 17 0 .0 Pass 0.3991 16 0 .0 Pass 0.3978 16 0 .0 Pass 0.4015 15 0 .0 Pass 0.4052 15 0 .0 Pass 0.4089 14 0 .0 Pass 0.4126 12 0 .0 Pass 0.4163 12 0 .0 Pass 0.4200 12 0 .0 Pass 0.4237 9 0 .0 Pass 0.4274 7 0 .0 Pass 0.4311 7 0 .0 Pass 0.4348 7 0 .0 Pass 0.4385 7 0 .0 Pass 0.4423 6 0 .0 Pass 0.4460 6 0 .0 Pass 0.4497 6 0 .0 Pass 0.4534 5 0 .0 Pass 0.4571 5 0 .0 Pass 0.4608 5 0 .0 Pass 0.4645 5 0 .0 Pass 0.4682 5 0 .0 Pass 0.4719 5 0 .0 Pass 0.9756 4 0 .0 Pass 0.9793 4 0 .0 Pass 0.4830 4 0 .0 Pass 0.4867 4 0 .0 Pass 0.4904 4 0 .0 Pass 0.9941 4 0 .0 Pass 0.4978 3 0 .0 Pass 0.5016 2 0 .0 Pass 0.5053 1 0 .0 Pass 0.5090 1 0 .0 Pass 0.5127 1 0 .0 Pass 0.5164 1 0 .0 Pass 0.5201 0 0 .0 Pass 0.5238 0 0 .0 Pass 0.5275 0 0 .0 Pass 0.5312 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.172 acre-feet On-line facility target flow: 0.18 cfs. Adjusted for 15 m3.n: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warrantees, erther expressed or unplied, including but not lrmrted to implied warrantres of program and accompanying documentation. In no event sha]1 AQUA TERRA Consultants and/or the Washington State Department of Ecology be lrable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 10.0 xxxx,xxxxxx~ea~~~+a~co~iaxxxxxxx 1.0 ,.. ,r.~caoooorraaooaooa ~ oaoaa4oaao"" ' o Predevelo ed ~ ~~_1 x Developec~fditlgated U k _~ ~ L3 t0E-2 1 10 20 30 d0 50 60 70 8D 90 99 Cumulative Probability ~ o Predeveloped ~ q, x Developed w~ facilitq 0 35 a ~. ___ ~ ._ _ ~ 0 27 - _ _ __ _ ___ _. _ w U "" 0 20 - _ _ _ _ ___ d m ~ 013 -~ - _ ___ ~_ __ U _N 1UE-5 a 10E~d 10E•3 10E~2 10E•1 1 10 Percent Exceedin TEAR f1044 (c1s) 100 1138 ;~, `_ ,~ ~, ~ ~ 3 .i~' ;~; is }~~ ;~i ;i~, ~ ;'~ 50 7 701 --~-~- ' , j ~; F1 ~ i 25 SD45 °~ ;~~ ~ a j . ~ j ~ ' 1 i S ; j ~ } 3~ i i~li 10 " 2.881 -° ~___ ._~. 5 1.518 ~_ ~ ~~ ~ ~ 1~ ,? 2 5459 Duration Graph aarly Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart Yearly Peaks for developed W/O Pond CLEARHIS BSN L1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L1 0 05 7.83 BSN L1 0 08 7 83 BSN L1 0 13 7 83 BSN L1 0 15 7 83 BSN L1 0 17 7 83 BSN L1 0 18 7 83 yr Drainage Area: BSN L1 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur 24.00 hrs Area CN Pervious 0.0330 ac 78.00 Impervious 0.1676 ac 98.00 Total 0.2006 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN L2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L2 0 19 8 00 BSN L2 0 32 8 00 BSN L2 0 51 8 00 BSN L2 0 60 8 00 BSN L2 0 65 8 00 BSN L2 0 70 8 00 yr Drainage Area: BSN L2 Hyd Method SBUH Hyd Peak Factor. 484 00 Storm Dur 24 00 hrs Area CN Pervious 0 1093 ac 78.00 Impervious 0 7272 ac 98.00 Peak Vol Area (ac-ft) ac 0 0153 0 20 0 0261 0 20 0 0418 0 20 0 0498 0 20 0 0538 0 20 0 0578 0 20 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPE1A 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs: 0 20 Intv 10.00 min TC 0 03 hrs 0.03 hrs 0 0330 ac 0 1213 ac 0 0463 ac Length. Slope: Coeff: Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length. Slope. Coeff Travel Time 137 00 ft 3.60% 27 0000 0 45 min 1850 ft 200% 00110 040 min 50.00 ft 0 50% 21.0000 0.56 mm 5.00 ft 2.00% 0.0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0658 0 84 SBUH/SCS TYPEIA 6 mo 0 1119 0 84 SBUH/SCS TYPE1A 2 yr 0 1780 0 84 SBUH/SCS TYPE1A 10 yr 0 2116 0 84 SBUH/SCS TYPE1A 25 yr 0 2284 0 84 SBUH/SCS TYPE1A 50 yr 0 2453 0 84 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs• 0 20 Intv• 10 00 min TC 0 03 hrs 013 hrs Total 0.8365 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0.1093 ac Impervious CN Data: ROADWAY 98.00 0 5053 ac SIDWALK 98 00 0 2219 ac Pervious TC Data: Flow type: Description: Length Slope Coeff• Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type: Description: Length• Slope Coeff. Travel Time Shallow Along Flow Line of Gutter 400.00 ft 0 85% 27 0000 2.68 min Sheet Across Roadway 27.00 ft 2 00% 0.0110 0.54 min Channel Through Strom Water Pipe 400.00 ft 0.50% 21.0000 4.49 min Sheet Across Sidewalks 12 00 ft 2.00% 0.0110 0.28 mm BSN L3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN L3 0 13 8 00 0 0439 0 53 SBUH/SCS TYPEIA 6 mo BSN L3 0 22 8 00 0 0741 0 53 SBUH/SCS TYPE1A 2 yr BSN L3 0 34 7 83 0 1170 0 53 SBUHlSCS TYPE1A 10 yr BSN L3 0 41 7 83 0 1387 0 53 SBUH/SCS TYPE1A 25 yr BSN L3 0 44 7 83 0 1496 0 53 SBUH/SCS TYPEIA 50 yr BSN L3 0 47 7 83 0.1605 0 53 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN L3 Hyd Method• SBUH Hyd Loss Metho d• SC S CN Number Peak Factor: 484.00 SCS Abs: 0.2 0 Storm Dur: 24.00 hrs Intv• 10 00 min Area CN TC Pervious 0.0445 ac 78.00 0.03 hrs Impervious 0.4891 ac 98.00 0.08 hrs Total 0 5336 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0445 ac Impervious CN Data: ROADWAY 98 00 0 3883 ac SIDWALK 98.00 0.1008 ac Pervious TC Data: Flow type Description: Length: Slope Coeff Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description Length• Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 252.00 ft 0 50% 27 0000 2 92 min Sheet Across Roadway 27.00 ft 2 00% 0.0110 0 54 min Channel Through Strom Water Pipe 80 00 ft 0 50% 21 0000 0 90 min Sheet Across Sidewalks 12.00 ft 2 00% 0 0110 0 28 min ADDHYD [BSN L1] AS [6 mo] [BSN L2] AS [6 mo] TO [BSN L1 +BSN L2] Peak Flow• 0 2336 cfs Peak Time 8 00 hrs Hyd Vol 3530 83 cf - 0 0811 acft ADDHYD [BSN L1] AS [2 yr] [BSN L2] AS [2 yr] TO [BSN L1 +BSN L2] Peak Flow• 0 3947 cfs Peak Time 8 00 hrs Hyd Vol: 6013.36 cf - 0 1380 acft ADDHYD [BSN L1] AS [10 yr] [BSN L2] AS [10 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.6246 cfs Peak Time 8 00 hrs Hyd Vol• 9574.92 cf - 0.2198 acft ADDHYD [BSN L1] AS [25 yr] [BSN L2] AS [25 yr] TO [BSN L1 +BSN L2] Peak Flow: 0 7407 cfs Peak Time. 8.00 hrs Hyd Vol. 11384 07 cf - 0 2613 acft ADDHYD [BSN L1] AS [50 yr] [BSN L2] AS [50 yr] TO [BSN L1 +BSN L2] Peak Flow. 0 7990 cfs Peak Time• 8 00 hrs Hyd Vol: 12293.08 cf - 0.2822 acft ADDHYD [BSN L1] AS [100 yr] [BSN L2] AS [100 yr] TO [BSN L1 +BSN LZ] Peak Flow: 0.8574 cfs Peak Time: 8.00 hrs Hyd Vol. 13204 63 cf - 0 3031 acft MOVEHYD [BSN L3] TO [BSN L3 - 6 mo] AS [6 mo] Peak Flow• 0.1312 cfs Peak Time 8.00 hrs Hyd Vol. 1912 47 cf - 0 0439 acft MOVEHYD [BSN L3] TO [BSN L3 - 2 yr] AS [2 yr] Peak Flow: 0.2190 cfs Peak Time: 8 00 hrs Hyd Vol: 3228.35 cf - 0.0741 acft MOVEHYD [BSN L3] TO [BSN L3 - 10 yr] AS (10 yr] Peak Flow 0.3436 cfs Peak Time: 7.83 hrs Hyd Vol 5097.27 cf - 0.1170 acft MOVEHYD [BSN L3] TO [BSN L3 - 25 yr] AS [25 yr] Peak Flow: 0.4064 cfs Peak Time: 7.83 hrs Hyd Vol 6041.61 cf - 0 1387 acft MOVEHYD [BSN L3] TO [BSN L3 - 50 yr] AS [50 yr] Peak Flow 0.4378 cfs Peak Time: 7.83 hrs Hyd Vol: 6515 20 cf - 0 1496 acft MOVEHYD [BSN L3] TO [BSN L3 - 100 yr] AS [100 yr] Peak Flow: 0 4693 cfs Peak Time 7 83 hrs Hyd Vol: 6989.58 cf - 0.1605 acft ADDHYD [BSN L1 +BSN L2] AS (6 mo] [BSN L3] AS [6 mo] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow• 0.3648 cfs Peak Time• 8.00 hrs Hyd Vol: 5443.3 cf - 0.1250 acft ADDHYD [BSN L1 +BSN L2] AS [2 yr] [BSN L3] AS [2 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow. 0.6137 cfs Peak Time• 8 00 hrs Hyd Vol 9241 71 cf - 0.2121 acft ADDHYD [BSN L1 +BSN L2] AS [10 yr] [BSN L3] AS [10 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 0 9682 cfs Peak Time: 8.00 hrs Hyd Vol• 14672 19 cf - 0.3368 acft ADDHYD [BSN L1 +BSN L2] AS [25 yr] [BSN L3] AS [25 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 1.1471 cfs Peak Time: 8 00 hrs Hyd Vol. 17425.68 cf - 0.3783 acft ADDHYD [BSN L1 +BSN L2] AS [50 yr] [BSN L3] AS [50 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Ffow 1.2368 cfs Peak Time: 8.00 hrs Hyd Vol. 18808 28 cf - 0 4318 acft ADDHYD [BSN L1 +BSN L2] AS [100 yr] [BSN L3] AS [100 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 1 3231 cfs Peak Time. 8 00 hrs Hyd Vol 20194 22 cf - 0.4636 acft Hydrograph ID: BASIN L Area 1 5707 ac Hyd Int 10.00 min Base Flow Peak Flow 1.3231 cfs Peak Time 8 00 hrs Hyd Vol 0 4636 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0.67 0 0042 8 83 0 4862 16 83 0 1836 0.83 0 0165 9 00 0 4808 17 00 0 1837 1.00 0 0313 9 17 0 4187 17 17 0.1776 1 17 0 0483 9 33 0 3639 17 33 0 1720 1 33 0 0648 9 50 0 3624 17 50 0 1719 1 50 0 0764 9 67 0 3415 17 67 0 1716 1 67 0 0893 9 83 0 3258 17 83 0 1717 1 83 0.1008 10 00 0 3251 18 00 0 1716 2 00 0 1085 10 17 0 3066 18 17 0 1656 2 17 0 1187 10 33 0 2902 18 33 0 1599 2 33 0 1282 10 50 0 2899 18 50 0 1599 2 50 0 1335 10 67 0 2771 18 67 0 1595 2 67 0 1380 10 83 0 2663 18 83 0.1596 2.83 0 1418 11 00 0 2661 19 00 0 1596 3 00 0 1451 11 17 0 2596 19 17 0 1535 3 17 0 1479 11 33 0 2543 19 33 0 1478 3 33 0 1504 11 50 0 2542 19 50 0 1478 3 50 0.1526 11 67 0 2480 19 67 0 1474 3 67 0 1593 11 83 0 2426 19 83 0 1475 3 83 0 1657 12 00 0 2425 20 00 0 1475 4 00 0 1677 12 17 0 2363 20 17 0 1475 4 17 0 1791 12 33 0 2308 20 33 0 1475 4 33 0 1901 12 50 0 2308 20 50 0 1476 4 50 0 1922 12 67 0 2245 20 67 0 1476 4 67 0 2039 12 83 0 2190 20 83 0 1476 4 83 0 2150 13 00 0 2189 21 00 0 1476 5 00 0 2177 13 17 0 2187 21 17 0 1477 5 17 0 2301 13 33 0 2188 21 33 0 1477 5 33 0 2418 13 50 0.2189 21 50 0 1477 5.50 0 2443 13 67 0 2129 21 67 0 1477 5 67 0 2568 13 83 0 2074 21 83 0 1478 5 83 0.2686 14 00 0 2073 22 00 0 1478 6 00 0 2709 14 17 0 2070 22 17 0 1416 6 17 0 2943 14 33 0 2072 22 33 0 1360 6 33 0 3165 14 50 0 2072 22 50 0 1359 6 50 0 3194 14 67 0 2012 22.67 0 1355 6 67 0 3547 14 83 0.1956 22 83 0.1356 6.83 0 3878 15 00 0 1956 23 00 0 1356 7.00 0 3915 15 17 0 1953 23 17 0 1356 7.17 0 4339 15 33 0 1954 23.33 0 1356 7 33 0 4729 15 50 0 1954 23 50 0 1356 7 50 0.4771 15 67 0 1894 23 67 0 1357 7 67 0 8947 15 83 0 1838 23 83 0 1357 7 83 1 2958 16 00 0 1837 24 00 0 1357 8 00 1 3231 16 17 0 1834 24 17 0 0676 8 17 1 0054 16 33 0 1835 24 33 0 0091 8 33 0 6764 16 50 0 1835 24 50 0 0021 8 50 0 6718 16 67 0 1836 24 67 0 0005 8 67 0 5632 16 83 0 1836 24 83 0 0001 Area 1.5707 ac Hyd Int: 10.00 min Base Flow: MOVEHYD [BASIN L] TO [BASIN L - 6 mo] AS [6 mo] Peak Flow: 0.3648 cfs Peak Time: 8 00 hrs Hyd Vol 5443 3 cf - 0 1250 acft MOVEHYD [BASIN L] TO [BASIN L - 100 yr] AS [100 yr] Peak Flow: 1.3231 cfs Peak Time: 8 00 hrs Hyd Vol. 20194 22 cf - 0.4636 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Bottom and Sides Start EI Max EI Increment 324 0000 ft 328.0000 ft 0.10 Infil• 10 00 In/hr Multiplier 1.00 Reach ID: BIOSWALE L Section Properties: Shape Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 12.0000 ft 3.0000 ft 3 OOh.1 v Up Node Dn Node Up Invert DUMMY M 0.0000 ft Routing Method Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh:1 v Dn Invert 0 0000 ft ROUTEHYD [BASIN L - 6 mo] THRU [BIOSWALE L] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin /Hyd ----- ac cfs cfs ratio ft ---- ftls ft/s ---------- BIOSWALE M 1 5707 0 3648 ---- 1.00 0 0969 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN L - 100 yr] THRU [BIOSWALE L] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE L 1 5707 1.3231 ---- 1 00 0 2234 Ditch 0 8964 ----- BASIN L Node ID: INFILTRATION L Desc. Bottom and Sides Start EI: 324 0000 ft Max EI: 329.0000 ft Contrib Basin: Contrib Hyd• Length Width Void Ratio 200 0000 ft 12 0000 ft 39 00 Bottom area only with infiltration COMPUTE [BASIN L] SUMMARY 100 yr MatchQ=PeakQ= 1 3231 cfs Peak Out O. 0 8732 cfs -Peak Stg: 330 49 ft -Active Vol: 2465 17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -L Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin L Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 DEVELOPED LAND USE Basin Basin L Flows To Bio-Infiltration Swale L Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale L Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 200ft. Bottom Width 12ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.000 acre-ft. Discharge Structure Riser Height: 0 ft. Riser Diameter: 0 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 328.0 0.055 0.000 0.000 0.000 328.1 0.057 0.004 0.000 0.111 328.2 0.060 0.009 0.000 0.111 328.2 0.062 0.014 0.000 0.111 328.3 0.064 0.019 0.000 0.111 ~~v s`' ~~ w~a C~~ ~OgEPH Dq~~ vJ of was~~ ~o %~ i C~ $ b b ~ gys,S O ^G,~ F~~s~ ~µF ~~. ~ ~~+°A~~-2Z 06 II{PIRES i1-22-/Jt7 i .328.4 0.067 0.024 0.000 0.111 328.5 0.069 0.029 0.000 0.111 328.5 0.071 0.034 0.000 0.111 328.6 0.074 0.090 0.000 0.111 328.7 0.076 0.096 0.000 0.111 328.8 0.078 0.052 0.000 0.111 328.9 0.081 0.058 0.000 0.111 328.9 0.083 0.064 0.000 0.111 329.0 0.085 0.071 0.000 0.111 329.1 0.088 0.078 0.000 0.111 329.2 0.090 0.085 0.000 0.111 329.2 0.093 0.092 0.000 0.111 329.3 0.095 0.099 0.000 0.111 329.4 0.098 0.107 0.000 0.111 329.5 0.100 0.114 0.000 0.111 329.6 0.103 0.122 0.000 0.111 329.6 0.105 0.130 0.000 0.111 329.7 0.107 0.138 0.000 0.111 329.8 0.110 0.197 0.000 0.111 329.9 0.112 0.156 0.000 0.111 329.9 0.115 0.169 0.000 0.111 330.0 0.118 0.173 0.000 0.111 330.1 0.120 0.183 0.000 0.111 330.2 0.123 0.192 0.000 0.111 330.3 0.125 0.202 0.000 0.111 330.3 0.128 0.212 0.000 0.111 330.4 0.130 0.222 0.000 0.111 330.5 0.133 0.232 0.000 0.111 330.6 0.135 0.242 0.000 0.111 330.6 0.138 0.253 0.000 0.111 330.7 0.141 0.264 0.000 0.111 330.8 0.143 0.275 0.000 0.111 330.9 0.146 0.286 0.000 0.111 331.0 0.149 0.297 0.000 0.111 331.0 0.151 0.309 0.000 0.111 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.303 0.000 1957 0.503 0.000 1958 0.289 0.000 1959 0.339 0.000 1960 0.373 0.000 1961 0.244 0.000 1962 0.268 0.000 1963 0.519 0.000 1964 0.390 0.000 1965 0.361 0.000 1966 0.258 0.000 1967 0.305 0.000 1968 0.296 0.000 1969 0.244 0.000 1970 0.244 0.000 1971 0.302 0.000 1972 0.339 0.000 1973 0.287 0.000 1974 0.334 0.000 1975 0.289 0.000 1976 0.331 0.000 1977 0.421 0.000 1978 0.358 0.000 1979 0.426 0.000 1980 0.320 0.000 1981 0.364 0.000 1982 0.423 0.000 1983 0.452 0.000 1984 0.275 0.000 1985 0.319 0.000 1986 0.351 0.000 1987 0.363 0.000 1988 0.212 0.000 1989 0.253 0.000 1990 0.995 0.000 1991 0.472 0.000 1992 0.311 0.000 1993 0.228 0.000 1994 0.253 0.000 1995 0.367 0.000 1996 0.372 0.000 1997 0.300 0.000 1998 0.420 0.000 1999 0.361 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5028 0.0000 2 0.9959 0.0000 3 0.4719 0.0000 4 0.9524 0.0000 5 0.4263 0.0000 6 0.4226 0.0000 7 0.4214 0.0000 8 0.4200 0.0000 9 0.3903 0.0000 10 0.3731 0.0000 11 0.3721 0.0000 12 0.3667 0.0000 13 0.3636 0.0000 14 0.3634 0.0000 _l5 0.3611 0.0000 16 0.3608 0.0000 17 0.3581 0.0000 18 0.3507 0.0000 19 0.3390 0.0000 20 0.3385 0.0000 .21 0.3338 0.0000 22 0.3310 0.0000 23 0.3197 0.0000 29 0.3193 0.0000 25 0.3109 0.0000 26 0.3048 0.0000 27 0.3025 0.0000 28 0.3019 0.0000 29 0.2998 0.0000 30 0.2892 0.0000 31 0.2888 0.0000 32 0.2867 0.0000 33 0.2747 0.0000 34 0.2678 0.0000 35 0.2579 0.0000 36 0.2532 0.0000 37 0.2532 0.0000 38 0.2461 0.0000 39 0.2442 0.0000 40 0.2441 0.0000 41 0.2438 0.0000 42 0.2278 0.0000 43 0.2116 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1643 1062 0 .0 Pass 0.1680 994 0 .0 Pass 0.1717 941 0 .0 Pass 0.1754 862 0 .0 Pass 0.1791 798 0 .0 Pass 0.1828 748 0 .0 Pass 0.1865 688 0 .0 Pass 0.1902 635 0 .0 Pass 0.1939 602 0 .0 Pass 0.1977 556 0 .0 Pass 0.2014 512 0 .0 Pass 0.2051 476 0 .0 Pass 0.2088 447 0 .0 Pass 0.2125 413 0 .0 Pass 0.2162 375 0 .0 Pass 0.2199 349 0 .0 Pass 0.2236 329 0 .0 Pass 0.2273 306 0 .0 Pass 0.2310 288 0 .0 Pass 0.2347 270 0 .0 Pass 0.2389 245 0 .0 Pass 0.2421 227 0 .0 Pass 0.2458 216 0 .0 Pass 0.2495 197 0 .0 Pass 0.2532 187 0 .0 Pass 0.2570 174 0 .0 Pass 0.2607 167 0 .0 Pass 0.2644 160 0 .0 Pass 0.2681 151 0 .0 Pass 0.2718 144 0 .0 Pass 0.2755 142 0 .0 Pass 0.2792 136 0 .0 Pass 0.2829 132 0 .0 Pass 0.2866 119 0 .0 Pass 0.2903 112 0 .0 Pass 0.2940 107 0 .0 Pass 0.2977 100 0 .0 Pass 0.3014 92 0 .0 Pass 0.3051 85 0 .0 Pass 0.3088 80 0 .0 Pass 0.3125 76 0 .0 Pass 0.3162 70 0 .0 Pass 0.3200 68 0 .0 Pass ,0.3237 65 0 .0 Pass 0.3274 60 0 .0 Pass 0.3311 54 0 .0 Pass 0.3348 52 0 .0 Pass 0.3385 51 0 .0 Pass 0.3422 49 0 .0 Pass 0.3459 43 0 .0 Pass 0.3496 40 0 .0 Pass 0.3533 36 0 .0 Pass 0.3570 35 0 .0 Pass 0.3607 33 0 .0 Pass 0.3644 27 0 .0 Pass 0.3681 24 0 .0 Pass 0.3718 29 0 .0 Pass 0.3755 22 0 .0 Pass 0.3793 21 0 .0 Pass 0.3830 19 0 .0 Pass 0.3867 19 0 .0 Pass 0.3904 17 0 .0 Pass 0.3941 16 0 .0 Pass 0.3978 16 0 .0 Pass 0.4015 15 0 .0 Pass 0.4052 15 0 .0 Pass 0.4089 14 0 .0 Pass 0.4126 12 0 .0 Pass 0.4163 12 0 .0 Pass 0.4200 12 0 .0 Pass 0.4237 9 0 .0 Pass 0.4274 7 0 .0 Pass 0.4311 7 0 .0 Pass 0.4348 7 0 .0 Pass 0.4385 7 0 .0 Pass 0.4423 6 0 .0 Pass 0.4460 6 0 .0 Pass 0.4497 6 0 .0 Pass 0.4534 5 0 .0 Pass 0.4571 5 0 .0 Pass 0.4608 5 0 .0 Pass 0.9645 5 0 .0 Pass 0.9682 5 0 .0 Pass 0.4719 5 0 .0 Pass 0.4756 4 0 .0 Pass 0.4793 9 0 .0 Pass 0.4830 4 0 .0 Pass 0.9867 4 0 .0 Pass 0.4904 4 0 .0 Pass 0.9941 4 0 .0 Pass 0.9978 3 0 .0 Pass 0.5016 2 0 .0 Pass 0.5053 1 0 .0 Pass 0.5090 1 0 .0 Pass 0.5127 1 0 .0 Pass 0.5164 1 0 .0 Pass 0.5201 0 0 .0 Pass 0.5238 0 0 .0 Pass 0.5275 0 0 .0 Pass 0.5312 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.172 acre-feet On-line facility target flow: 0.18 cfs. Adjusted for 15 min: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any darnages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 kkkkkkkkkkYk}yP?r:~W~~k}~kkkkk 1.0 ,.... ooooo~occ~`'~o Redeveloped ,~ 10E-1 x Developec~kliiigated ~ x ~ ~ 10E-2 1 10 20 10 40 50 60 ?0 80 90 99 Cumulative Probabili ~ o Predeveloped 0 q, x Developed wig facility 035 .. a ..._ ._ .. - . ~ 027 . - - ~ -._ w U "r' 020 ._ __. d C7f ~ 013 __. ._ ___ . L U _N 1pE•5 ~ 10E-4 10E•3 10E~2 10E-1 1 10 Percent Exceedin '1F,AR FLOW {Ns) 100 11 38 ~ 3 l'' ~~ i3 4£, E~ rr E ~ E~ 3t ~ E~ 3f ~ 50 7701 ~ ; ~ ~ ~ ~ ;3 , s ~E i ~i,E 25 5 045 _ ~ _ ; , ~ , 10 2.681 ._.,.~...~...__._.,_..a~,~, ~ . , ~ E , ; ~ ; , z E 3~ ,3 5 1.518 ---~--~-----?-°-- - `, , ` ` ~ E ~ 2 ..5459 _ ii ~~ €i ~ ~ ~ Duration Graph early Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart Yearly Peaks for developed W/0 Pond CLEARHIS BSN L1 Event Summary: BasmlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L1 0 05 7 83 BSN L1 0 08 7 83 BSN L1 0 13 7 83 BSN L1 0 15 7 83 BSN L1 0 17 7 83 BSN L1 0 18 7 83 yr Drainage Area: BSN L1 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0330 ac 78.00 Impervious 0.1676 ac 98 00 Total 0.2006 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 Pervious TC Data: Flow type. Description. Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN L2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L2 0 19 8 00 BSN L2 0 32 8 00 BSN L2 0 51 8 00 BSN L2 0 60 8 00 BSN L2 0 65 8 00 BSN L2 0 70 8 00 yr Drainage Area: BSN L2 Hyd Method. SBUH Hyd Peak Factor: 484.00 Storm Dur. 24.00 hrs Area CN Pervious 0.1093 ac 78 00 Impervious 0 7272 ac 98 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0153 0 20 SBUH/SCS TYPEIA 6 mo 0 0261 0 20 SBUH/SCS TYPEIA 2 yr 0 0418 0 20 SBUH/SCS TYPEIA 10 yr 0 0498 0 20 SBUH/SCS TYPE1A 25 yr 0 0538 0 20 SBUH/SCS TYPEIA 50 yr 0 0578 0 20 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs 0 20 Inty• 10 00 min TC 0.03 hrs 0.03 hrs 0 0330 ac 0.1213 ac 0.0463 ac Length: Slope Coeff Travel Time 6.00 ft 2.00% 0 2400 1 90 min Length. Slope: Coeff Travel Time 137 00 ft 3.60% 27 0000 0.45 min 18 50 ft 2.00% 0.0110 0.40 min 50 00 ft 0.50% 21.0000 0.56 min 5 00 ft 2.00% 0.0110 0 14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0658 0 84 SBUH/SCS TYPE1A 6 mo 0 1119 0 84 SBUH/SCS TYPEIA 2 yr 0 1780 0 84 SBUH/SCS TYPEIA 10 yr 0 2116 0 84 SBUH/SCS TYPEIA 25 yr 0 2284 0 84 SBUH/SCS TYPE1A 50 yr 0 2453 0 84 SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs 0 20 Intv. 10.00 min TC 0 03 hrs 0 13 hrs Total 0.8365 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 Pervious TC Data: Flow type Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN L3 Event Summary: BasinlD Peak Q Event ------- (cfs) BSN L3 0 13 BSN L3 0 22 BSN L3 0 34 BSN L3 0 41 BSN L3 0 44 BSN L3 0 47 yr Drainage Area: BSN L3 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur• 24.00 hrs 0.1093 ac 0 5053 ac 0.2219 ac Length: Slope Coeff• 6.00 ft 2 00% 0 2400 Travel Time 1.90 min Length: Slope. Coeff Travel Time 400.00 ft 0 85% 27.0000 2 68 mm 27.00 ft 2.00% 0.0110 0.54 min 400 00 ft 0.50% 21.0000 4.49 min 12.00 ft 2 00% 0 0110 0 28 mm Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0439 0 53 SBUH/SCS TYPE1A 6 mo 8 00 0 0741 0 53 SBUH/SCS TYPEIA 2 yr 7 83 0 1170 0 53 SBUH/SCS TYPEIA 10 yr 7 83 0 1387 0 53 SBUH/SCS TYPEIA 25 yr 7 83 0 1496 0 53 SBUHISCS TYPE1A 50 yr 7 83 0 1605 0 53 SBUH/SCS TYPEIA 100 Area CN Pervious 0.0445 ac 78 00 Impervious 0 4891 ac 98 00 Total 0.5336 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type' Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method• SCS CN Number SCS Abs: 0.20 Intv• 10.00 min TC 0.03 hrs 0 08 hrs 0 0445 ac 0 3883 ac 0.1008 ac Length: Slope. Coeff Travel Time 6.00 ft 2 00% 0 2400 1.90 min Length. Slope: Coeff: Travel Time 252 00 ft 0.50% 27.0000 2.92 min 27 00 ft 2.00% 0 0110 0.54 min 80 00 ft 0 50% 21 0000 0.90 min 1200 ft 200% 00110 028 min ADDHYD [BSN L1] AS [6 mo] [BSN L2] AS [6 mo] TO [BSN L1 +BSN L2] Peak Flow: 0 2336 cfs Peak Time: 8.00 hrs Hyd Vol: 3530 83 cf - 0 0811 acft ADDHYD [BSN L1] AS [2 yr] [BSN L2] AS [2 yr] TO [BSN L1 +BSN L2] Peak Flow 0.3947 cfs Peak Time• 8 00 hrs Hyd Vol. 6013.36 cf - 0 1380 acft ADDHYD [BSN L1] AS [10 yr] [BSN L2] AS [10 yr] TO [BSN L1 +BSN L2] Peak Flow. 0.6246 cfs Peak Time 8.00 hrs Hyd Vol: 9574.92 cf - 0.2198 acft ADDHYD [BSN L1] AS [25 yr] [BSN L2] AS [25 yr] TO [BSN L1 +BSN L2] Peak Flow 0.7407 cfs Peak Time 8 00 hrs Hyd Vol: 11384 07 cf - 0.2613 acft ADDHYD [BSN L1] AS [50 yr] [BSN L2] AS [50 yr] TO [BSN L1 +BSN L2] Peak Flow. 0.7990 cfs Peak Time 8.00 hrs Hyd Vol. 12293.08 cf - 0.2822 acft ADDHYD [BSN L1] AS [100 yr] [BSN L2] AS [100 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.8574 cfs Peak Time: 8.00 hrs Hyd Vol 13204.63 cf - 0 3031 acft MOVEHYD [BSN L3] TO [BSN L3 - 6 mo] AS [6 mo] Peak Flow• 0.1312 cfs Peak Time 8 00 hrs Hyd Vol 1912 47 cf - 0 0439 acft MOVEHYD [BSN L3] TO [BSN L3 - 2 yr] AS [2 yr] Peak Flow 0.2190 cfs Peak Time: 8.00 hrs Hyd Vol: 3228.35 cf - 0 0741 acft MOVEHYD [BSN L3] TO [BSN L3 - 10 yr] AS [10 yr] Peak Flow: 0.3436 cfs Peak Time 7 83 hrs Hyd Vol: 5097 27 cf - 0.1170 acft MOVEHYD [BSN L3] TO [BSN L3 - 25 yr] AS [25 yr] Peak Flow: 0.4064 cfs Peak Time. 7.83 hrs Hyd Vol: 6041 61 cf - 0.1387 acft MOVEHYD [BSN L3] TO [BSN L3 - 50 yr] AS [50 yr] Peak Flow• 0.4378 cfs Peak Time. 7 83 hrs Hyd Vol 6515.20 cf - 0 1496 acft MOVEHYD [BSN L3] TO [BSN L3 - 100 yr] AS [100 yr] Peak Flow: 0.4693 cfs Peak Time: 7 83 hrs Hyd Vol: 6989 58 cf - 0.1605 acft ADDHYD [BSN L1 +BSN L2] AS [6 mo] [BSN L3] AS [6 mo] TO [BSN L1 +BSN L2 +BSN L3j Peak Flow. 0.3648 cfs Peak Time: 8 00 hrs Hyd Vol: 5443 3 cf - 0 1250 acft ADDHYD [BSN L1 +BSN L2] AS [2 yr] [BSN L3] AS [2 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 0.6137 cfs Peak Time. 8 00 hrs Hyd Vol. 9241 71 cf - 0.2121 acft ADDHYD [BSN L1 +BSN L2] AS [10 yr] [BSN L3] AS [10 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 0.9682 cfs Peak Time 8.00 hrs Hyd Vol• 14672 19 cf - 0 3368 acft ADDHYD [BSN L1 +BSN L2] AS [25 yr] [BSN L3] AS [25 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow. 1.1471 cfs Peak Time. 8 00 hrs Hyd Vol 17425 68 cf - 0.3783 acft ADDHYD [BSN L1 +BSN L2] AS [50 yr] [BSN L3] AS [50 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 1 2368 cfs Peak Time: 8 00 hrs Hyd Vol. 18808 28 cf - 0 4318 acft ADDHYD [BSN L1 +BSN L2] AS [100 yr] [BSN L3] AS [100 yr) TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 1.3231 cfs Peak Time: 8 00 hrs Hyd Vol. 20194 22 cf - 0 4636 acft Hydrograph ID: BASIN L Area: 1.5707 ac Hyd Int. 10.00 min Base Flow. Peak Flow 1.3231 cfs Peak Time. 8 00 hrs Hyd Vol: 0.4636 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0042 8 83 0 4862 16 83 0 1836 0 83 0 0165 9 00 0 4808 17 00 0 1837 1 00 0 0313 9 17 0 4187 17 17 0.1776 1 17 0 0483 9 33 0 3639 17 33 0 1720 1 33 0.0648 9 50 0 3624 17 50 0 1719 1 50 0 0764 9 67 0 3415 17 67 0 1716 1.67 0 0893 9 83 0 3258 17 83 0 1717 1 83 0 1008 10 00 0 3251 18 00 0 1716 2 00 0 1085 10 17 0 3066 18 17 0 1656 2 17 0 1187 10 33 0 2902 18 33 0 1599 2 33 0 1282 10 50 0 2899 18 50 0 1599 2 50 0 1335 10 67 0 2771 18 67 0 1595 2 67 0 1380 10 83 0 2663 18 83 0 1596 2 83 0 1418 11 00 0 2661 19 00 0 1596 3 00 0 1451 11 17 0 2596 19 17 0 1535 3 17 0 1479 11 33 0 2543 19 33 0.1478 3 33 0 1504 11 50 0 2542 19 50 0 1478 3 50 0 1526 11 67 0 2480 19 67 0 1474 3.67 0 1593 11 83 0 2426 19 83 0 1475 3 83 0 1657 12 00 0 2425 20 00 0 1475 4 00 0 1677 12.17 0 2363 20 17 0.1475 4 17 0 1791 12 33 0 2308 20 33 0 1475 4 33 0 1901 12 50 0 2308 20 50 0 1476 4 50 0 1922 12 67 0 2245 20 67 0 1476 4 67 0 2039 12 83 0 2190 20 83 0 1476 4 83 0 2150 13 00 0 2189 21 00 0 1476 5.00 0 2177 13 17 0 2187 21 17 0 1477 5.17 0 2301 13 33 0 2188 21 33 0 1477 5 33 0.2418 13 50 0 2189 21 50 0 1477 5 50 0 2443 13 67 0 2129 21 67 0.1477 5.67 0 2568 13 83 0 2074 21 83 0 1478 5 83 0.2686 14 00 0.2073 22 00 0 1478 6 00 0 2709 14 17 0 2070 22 17 0.1416 6 17 0 2943 14 33 0 2072 22 33 0 1360 6 33 0 3165 14 50 0 2072 22 50 0 1359 6 50 0 3194 14 67 0 2012 22 67 0 1355 6.67 0.3547 14 83 0 1956 22.83 0 1356 6 83 0 3878 15 00 0.1956 23 00 0 1356 7 00 0 3915 15 17 0 1953 23 17 0 1356 7 17 0 4339 15 33 0 1954 23 33 0 1356 7 33 0 4729 15 50 0 1954 23 50 0 1356 7 50 0 4771 15 67 0 1894 23 67 0 1357 7 67 0 8947 15 83 0 1838 23 83 0 1357 7 83 1 2958 16 00 0 1837 24 00 0 1357 8 00 1 3231 16 17 0 1834 24 17 0 0676 8 17 1 0054 16 33 0 1835 24 33 0 0091 8 33 0 6764 16 50 0 1835 24 50 0.0021 8 50 0 6718 16 67 0 1836 24 67 0 0005 8 67 0 5632 16 83 0 1836 24 83 0 0001 Area 1 5707 ac Hyd Int~ 10.00 min Base Flow. MOVEHYD [BASIN L] TO [BA SIN L - 6 mo] AS [6 mo] Peak Flow. 0.3648 cfs Peak Time. 8 00 hrs Hyd Vol 5443 3 cf - 0.1250 acft MOVEHYD [BASIN L] TO [BASIN L - 100 yr] AS [100 yr] Peak Flow: 1.3231 cfs Peak Time 8.00 hrs Hyd Vol- 20194 22 cf - 0 4636 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp: Bottom and Sides Start EI Max EI Increment 324.0000 ft 328.0000 ft 0.10 Infil: 10.00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE L Section Properties: Shape• Ditch Slze Material Mannings n Corr Metal -normal Length Slope Entrance Loss 200.0000 ft 1 00 Width Bank Hgt ss1 12 0000 ft 3 0000 ft 3 OOh • 1 v Up Node Dn Node Up Invert DUMMY M 0.0000 ft Routing Method Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh•1v Dn Invert 0 0000 ft ROUTEHYD (BASIN L - 6 mo] THRU [BIOSWALE L] USING THUR100Y AND (6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 1 5707 0 3648 ---- 1 00 0 0969 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN L - 100 yr] THRU [BIOSWALE L] USING THUR100Y AND (100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ----- ac cfs cfs ratio ft ---- ftls ft/s ---------- BIOSWALE L 1 5707 1 3231 ---- 1 00 0 2234 Ditch 0 8964 ----- BASIN L Node ID: INFILTRATION L Desc: Bottom and Sides Start EI: 324.0000 ft Max EI• 329.0000 ft Contnb Basin: Contrib Hyd. Length Width Void Ratlo 200 0000 ft 12 0000 ft 39.00 Bottom area only with infiltration COMPUTE [BASIN L] SUMMARY 100 yr MatchO=PeakQ= 1 3231 cfs Peak Out Q. 0 8732 cfs -Peak Stg. 330.49 ft -Active Vol: 2465.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -L Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin L Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 DEVELOPED LAND USE Basin Basin L Flows To Bio-Infiltration Swale L Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.46 IMPERVIOUS: 1.32 e.~. ,~ RCHRES (POND) INFORMATION ~`~ Pond Name: Bio-Infiltration Swale L `'_ Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance '~`J Pond Rain / Evap is not activated. n, .., ~,., ~ , ,.., Depth: aft. Bottom Length: 200ft. Bottom Width 12ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0 ft. Riser Diameter: 0 in. 0.000 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 328.0 0.055 0.000 0.000 0.000 328.1 0.057 0.004 0.000 0.111 328.2 0.060 0.009 0.000 0.111 328.2 0.062 0.014 0.000 0.111 328.3 0.064 0.019 0.000 0.111 EXPIRES: i1-22- m~p$g 328.4 0.067 0.024 0.000 0.111 328.5 0.069 0.029 0.000 0.111 328.5 0.071 0.034 0.000 0.111 328.6 0.074 0.040 0.000 0.111 328.7 0.076 0.046 0.000 0.111 328.8 0.078 0.052 0.000 0.111 328.9 0.081 0.058 0.000 0.111 328.9 0.083 0.064 0.000 0.111 329.0 0.085 0.071 0.000 0.111 329.1 0.088 0.078 0.000 0.111 329.2 0.090 0.085 0.000 0.111 329.2 0.093 0.092 0.000 0.111 329.3 0.095 0.099 0.000 0.111 329.4 0.098 0.107 0.000 0.111 329.5 0.100 0.114 0.000 0.111 329.6 0.103 0.122 0.000 0.111 329.6 0.105 0.130 0.000 0.111 329.7 0.107 0.138 0.000 0.111 329.8 0.110 0.147 0.000 0.111 329.9 0.112 0.156 0.000 0.111 329.9 0.115 0.164 0.000 0.111 330.0 0.118 0.173 0.000 0.111 330.1 0.120 0.183 0.000 0.111 330.2 0.123 0.192 0.000 0.111 330.3 0.125 0.202 0.000 0.111 330.3 0.128 0.212 0.000 0.111 330.4 0.130 0.222 0.000 0.111 330.5 0.133 0.232 0.000 0.111 330.6 0.135 0.242 0.000 0.111 330.6 0.138 0.253 0.000 0.111 330.7 0.141 0.264 0.000 0.111 330.8 0.143 0.275 0.000 0.111 330.9 0.146 0.286 0.000 0.111 331.0 0.149 0.297 0.000 0.111 331.0 0.151 0.309 0.000 0.111 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(efs) 2 year 0.328599 5 year 0.398524 10 year 0.441759 25 year 0.49385 50 year 0.531201 100 year 0.56755 Flow Frequency Return Periods for Developed Ma.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Yeah Predeveloped Developed 1956 0.303 0.000 1957 0.503 0.000 1958 0.289 0.000 1959 0.339 0.000 1960 0.373 0.000 1961 0.244 0.000 1962 0.268 0.000 1963 0.519 0.000 1964 0.390 0.000 1965 0.361 0.000 1966 0.258 0.000 1967 0.305 0.000 1968 0.246 0.000 1969 0.244 0.000 1970 0.244 0.000 1971 0.302 0.000 1972 0.339 0.000 1973 0.287 0.000 1974 0.334 0.000 1975 0.289 0.000 1976 0.331 0.000 1977 0.421 0.000 1978 0.358 0.000 1979 0.426 0.000 1980 0.320 0.000 1981 0.364 0.000 1982 0.423 0.000 1983 0.452 0.000 1984 0.275 0.000 1985 0.319 0.000 1986 0.351 0.000 1987 0.363 0.000 1988 0.212 0.000 1989 0.253 0.000 1990 0.495 0.000 1991 0.472 0.000 1992 0.311 0.000 1993 0.228 0.000 1994 0.253 0.000 1995 0.367 0.000 1996 0.372 0.000 1997 0.300 0.000 1998 0.420 0.000 1999 0.361 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5028 0.0000 2 0.4954 0.0000 3 0.4719 0.0000 4 0.4524 0.0000 5 0.4263 0.0000 6 0.4226 0.0000 7 0.4214 0.0000 8 0.4200 0.0000 9 0.3903 0.0000 10 0.3731 0.0000 11 0.3721 0.0000 12 0.3667 0.0000 13 0.3636 0.0000 14 0.3634 0.0000 15 0.3611 0.0000 16 0.3608 0.0000 17 0.3581 0.0000 18 0.3507 0.0000 19 0.3390 0.0000 20 0.3385 0.0000 0.3338 0.0000 0.3310 0.0000 0.3197 0.0000 0.3193 0.0000 0.3109 0.0000 0.3048 0.0000 0.3025 0.0000 0.3019 0.0000 0.2998 0.0000 0.2892 0.0000 0.2888 0.0000 0.2867 0.0000 0.2747 0.0000 0.2678 0.0000 0.2579 0.0000 0.2532 0.0000 0.2532 0.0000 0.2461 0.0000 0.2442 0.0000 0.2441 0.0000 0.2438 0.0000 0.2278 0.0000 0.2116 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1643 1062 0 .0 Pass 0.1680 994 0 .0 Pass 0.1717 941 0 .0 Pass 0.1754 862 0 .0 Pass 0.1791 798 0 .0 Pass 0.1828 748 0 .0 Pass 0.1865 688 0 .0 Pass 0.1902 635 0 .0 Pass 0.1939 602 0 .0 Pass 0.1977 556 0 .0 Pass 0.2014 512 0 .0 Pass 0.2051 476 0 .0 Pass 0.2088 447 0 .0 Pass 0.2125 413 0 .0 Pass 0.2162 375 0 .0 Pass 0.2199 349 0 .0 Pass 0.2236 324 0 .0 Pass 0.2273 306 0 .0 Pass 0.2310 288 0 .0 Pass 0.2347 270 0 .0 Pass 0.2384 245 0 .0 Pass 0.2421 227 0 .0 Pass 0.2458 216 0 .0 Pass 0.2495 197 0 .0 Pass 0.2532 187 0 .0 Pass 0.2570 174 0 .0 Pass 0.2607 167 0 .0 Pass 0.2644 160 0 .0 Pass 0.2681 151 0 .0 Pass 0.2718 144 0 .0 Pass 0.2755 142 0 .0 Pass 0.2792 136 0 .0 Pass 0.2829 132 0 .0 Pass 0.2866 119 0 .0 Pass 0.2903 112 0 .0 Pass 0.2940 107 0 .0 Pass 0.2977 100 0 .0 Pass 0.3014 92 0 .0 Pass 0.3051 85 0 .0 Pass 0.3088 80 0 .0 Pass 0.3125 76 0 .0 Pass 0.3162 70 0 .0 Pass 0.3200 68 0 .0 Pass 0.3237 65 0 .0 Pass 0.3.274 60 0 .0 Pass 0.3311 54 0 .0 Pass 0.3348 52 0 .0 Pass 0.3385 51 0 .0 Pass 0.3422 44 0 .0 Pass 0.3459 43 0 .0 Pass 0.3496 40 0 .0 Pass 0.3533 36 0 .0 Pass 0.3570 35 0 .0 Pass 0.3607 33 0 .0 Pass 0.3644 27 0 .0 Pass 0.3681 24 0 .0 Pass 0.3718 24 0 .0 Pass 0.3755 22 0 .0 Pass 0.3793 21 0 .0 Pass 0.3830 19 0 .0 Pass 0.3867 19 0 .0 Pass 0.3904 17 0 .0 Pass 0.3941 16 0 .0 Pass 0.3978 16 0 .0 Pass 0.4015 15 0 .0 Pass 0.4052 15 0 .0 Pass 0.4089 14 0 .0 Pass 0.4126 12 0 .0 Pass 0.4163 12 0 .0 Pass 0.4200 12 0 .0 Pass 0.4237 9 0 .0 Pass 0.4274 7 0 .0 Pass 0.4311 7 0 .0 Pass 0.4348 7 0 .0 Pass 0.4385 7 0 .0 Pass 0.4423 6 0 .0 Pass 0.4460 6 0 .0 Pass 0.4497 6 0 .0 Pass 0.4534 5 0 .0 Pass 0.4571 5 0 .0 Pass 0.4608 5 0 .0 Pass 0.4645 5 0 .0 Pass 0.4682 5 0 .0 Pass 0.4719 5 0 .0 Pass 0.4756 4 0 .0 Pass 0.4793 4 0 .0 Pass 0.4830 4 0 .0 Pass 0.4867 4 0 .0 Pass 0.4904 4 0 .0 Pass 0.4941 4 0 .0 Pass 0.4978 3 0 .0 Pass 0.5016 2 0 .0 Pass 0.5053 1 0 .0 Pass 0.5090 1 0 .0 Pass 0.5127 1 0 .0 Pass 0.5164 1 0 .0 Pass 0.5201 0 0 .0 Pass 0.5238 0 0 .0 Pass 0.5275 0 0 .0 Pass 0.5312 0 0 .0 Pass Water Quality BMP Elow and Volume. On-line facility volume: 0.172 acre-feet On-la.ne facility target flow: 0.18 cfs. Adjusted for 15 ma.n: 0.2 cfs. Off-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. TEM ~flO}~rytVtcfs) U1 ! ~ 1 1~ ~ _ ~ ~ P ~ ~ ~ 1Q0 xxxxxxxxxxx~.~~~~ac~xxxxxxx ~y ~ y 3 ~ ~ ~ 33133 ~V YLV i ~.m..~.. s l 33 1 s 1111113 ryy ~y.~ ,{ r 25 31395 a ~ ~~ .~~~ 1 1 ,' 10 ~ 3d69 ~ _ ~ ~ ~ 1.0 f ' ~ 1 1 E 5 " .3117 ~ ~ ; ~ 1 ^ l r : ° ~ ~ ~ 1 ~ ~ ~ ~ ' ~ ~ L7i ~~(~TS~~ p'ppC> developed ~~, ~ ~ i 2 2551 ' ' ' _- ~ ,~ 10E-1 ed c~)ditigat ~ D ope `~~ ~ . ~ ~ ~ ~> ~ ~ ~ ~ .A, a 99~__ 1 "10 _ 28 3d ~)0 50 64°"~70. 8D°_-~9ii _ ~- _ ~ Cutnulat~-re ,Pr~kiabili Yearly Peaks for Predeveloped Flow Frequency Chart TE,gR fLOUl (~ 18Q .450U o PYedevelap~d ~t1 ~ .4291. `~ ~ , ; • ~ , ~ ~ 1 ' ~ ~ ~ A ~ x De~alop~d ~u F1~+j 25 ,~ , "~-,~` -~„ '14 ,,~~s ~ i i~ f~ ~ ~, ~ .,... 0.27 ,,, ~ .~.,~~._.,~~. ,,.. ~ ,o...~. ,,, ~E ~v ~ ~ ~ `~ ~ ~ r ~_~ ~. _' 2 ,255' _ - ~ ~ ' ~ Q.13 ~ - _ . ~... ~ ~ ___ ~-___ _~ ~ ~ ~ _ ~~ ,,, ~~ ~ _~ _ i , , 1 ~~-5 ~~ 10E-4 10E•3 1GE•2 ~ 14E~1 ~ 18 ~~ ~ rs.- ~= = P~r~~r~t ~xc~~din Yearly Peaks for developed W/O Pond ~ Duration Graph TSAR flQtU ~~) 1f~ ~ 1138 ~~ ~1 1l ~~~: 3 ~, 54 7.781 € ~ _ _ ?{ iil _ E 3 ~ i _~~AA~~ ~ 3 25 ~54^Tl 1jj3 3 7 ~ ~ 3 1t~ ' <.~1 ~- ...~.~ _. .~ 9 ;.i8 _ ~ , ~ , , _ _ ,~i~~ ~ W ~_ ~ 5459 `"v`•a`~,..:~.v'es5e«~:Er~ Yearly Peaks for Developed W/Pond CLEARHIS BSN L1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L1 0 05 7 83 BSN L1 0 08 7 83 BSN L1 0 13 7 83 BSN L1 0 15 7 83 BSN L1 0 17 7.83 BSN L1 0 18 7 83 yr Drainage Area: BSN L1 Hyd Method• SBUH Hyd Peak Factor 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0330 ac 78.00 Impervious 0 1676 ac 98.00 Total 0.2006 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type. Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN L2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN L2 0 19 8 00 BSN L2 0.32 8 00 BSN L2 0 51 8 00 BSN L2 0 60 8 00 BSN L2 0 65 8 00 BSN L2 0 70 8 00 yr Drainage Area: BSN L2 Hyd Method SBUH Hyd Peak Factor 484.00 Storm Dur 24 00 hrs Area CN Pervious 0.1093 ac 78.00 Impervious 0.7272 ac 98 00 Peak Vol Area (ac-ft) ac 0 0153 0 20 0 0261 0 20 0 0418 0 20 0 0498 0 20 0 0538 0 20 0 0578 0 20 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPE1A 2 yr SBUH/SCS TYPE1A 10 yr SBUH/SCS TYPE1A 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs. 0.20 Intv: 10.00 min TC 0.03 hrs 0 03 hrs 0.0330 ac 0.1213 ac 0.0463 ac Length: Slope: Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 mm Length: Slope: Coeff: Travel Time 137.00 ft 3.60% 27.0000 0.45 min 18.50 ft 2.00% 0.0110 0.40 min 50.00 ft 0 50% 21.0000 0.56 min 5.00 ft 2.00% 0.0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0658 0 84 SBUH/SCS TYPE1A 6 mo 0 1119 0 84 SBUH/SCS TYPE1A 2 yr 0 1780 0 84 SBUH/SCS TYPE1A 10 yr 0 2116 0 84 SBUH/SCS TYPE1A 25 yr 0 2284 0 84 SBUH/SCS TYPE1A 50 yr 0 2453 0 84 SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs 0.20 Intv: 10.00 min TC 0 03 hrs 0.13 hrs Total 0.8365 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.1093 ac Impervious CN Data: ROADWAY 98.00 0.5053 ac SIDWALK 98 00 0.2219 ac Pervious TC Data: Flow type: Description. Length: Slope• Coeff' Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description: Length. Slope: Coeff: Travel Time Shallow Along Flow Line of Gutter 400 00 ft 0.85% 27.0000 2.68 min Sheet Across Roadway 27.00 ft 2.00% 0.0110 0.54 min Channel Through Strom Water Pipe 400.00 ft 0.50% 21.0000 4.49 min Sheet Across Sidewalks 12.00 ft 2 00% 0 0110 0.28 min BSN L3 Event Summary: BasinlD Peak O Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN L3 0 13 8 00 0 0439 0 53 SBUH/SCS TYPE1A 6 mo BSN L3 0 22 8 00 0 0741 0 53 SBUH/SCS TYPE1A 2 yr BSN L3 0 34 7 83 0.1170 0 53 SBUH/SCS TYPE1A 10 yr BSN L3 0 41 7 83 0.1387 0 53 SBUH/SCS TYPE1A 25 yr BSN L3 0 44 7 83 0 1496 0 53 SBUH/SCS TYPE1A 50 yr BSN L3 0 47 7 83 0.1605 0 53 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN L3 Hyd Method• SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0445 ac 78.00 Impervious 0.4891 ac 98 00 Total 0.5336 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 Pervious TC Data: Flow type. Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10 00 min TC 0.03 hrs 0.08 hrs 0.0445 ac 0 3883 ac 0.1008 ac Length• Slope. Coeff: Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length• Slope• Coeff. Travel Time 252.00 ft 0.50% 27.0000 2.92 min 27.00 ft 2 00% 0.0110 0 54 min 80 00 ft 0.50% 21 0000 0.90 min 12.00 ft 2 00% 0.0110 0.28 mm ADDHYD [BSN L1] AS [6 mo] [BSN L2] AS [6 mo] TO [BSN L1 +BSN L2] Peak Flow 0.2336 cfs Peak Time: 8.00 hrs Hyd Vol. 3530.83 cf - 0.0811 acft ADDHYD [BSN L1] AS [2 yr] [BSN L2] AS [2 yr] TO [BSN L1 +BSN L2] Peak Flow. 0 3947 cfs Peak Time: 8 00 hrs Hyd Vol 6013.36 cf - 0.1380 acft ADDHYD [BSN L1] AS [10 yr] [BSN L2] AS [10 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.6246 cfs Peak Time: 8.00 hrs Hyd Vol: 9574.92 cf - 0.2198 acft ADDHYD [BSN L1] AS [25 yr] (BSN L2] AS [25 yr] TO [BSN L1 +BSN L2] Peak Flow. 0.7407 cfs Peak Time 8.00 hrs Hyd Vol: 11384.07 cf - 0.2613 acft ADDHYD [BSN L1] AS [50 yr] [BSN L2] AS [50 yr] TO [BSN L1 +BSN L2] Peak Flow: 0.7990 cfs Peak Time: 8 00 hrs Hyd Vol: 12293.08 cf - 0 2822 acft ADDHYD [BSN L1] AS [100 yr] [BSN L2] AS [100 yr] TO [BSN L1 +BSN L2] Peak Flow• 0.8574 cfs Peak Time: 8.00 hrs Hyd Vol. 13204.63 cf - 0 3031 acft MOVEHYD [BSN L3] TO [BSN L3 - 6 mo] AS [6 mo] Peak Flow: 0.1312 cfs Peak Time: 8.00 hrs Hyd Vol. 1912.47 cf - 0.0439 acft MOVEHYD [BSN L3] TO [BSN L3 - 2 yr] AS (2 yr] Peak Flow: 0 2190 cfs Peak Time: 8.00 hrs Hyd Vol: 3228 35 cf - 0.0741 acft MOVEHYD [BSN L3] TO [BSN L3 -10 yr] AS [10 yr] Peak Flow. 0 3436 cfs Peak Time: 7.83 hrs Hyd Vol: 5097.27 cf - 0.1170 acft MOVEHYD [BSN L3] TO [BSN L3 - 25 yr] AS [25 yr] Peak Flow. 0.4064 cfs Peak Time: 7.83 hrs Hyd Vol: 6041.61 cf - 0.1387 acft MOVEHYD [BSN L3] TO [BSN L3 - 50 yr] AS [50 yr] Peak Flow 0.4378 cfs Peak Time: 7 83 hrs Hyd Vol: 6515.20 cf - 0.1496 acft MOVEHYD [BSN L3] TO [BSN L3 -100 yr] AS [100 yr] Peak Flow• 0.4693 cfs Peak Time: 7.83 hrs Hyd Vol: 6989.58 cf - 0.1605 acft ADDHYD [BSN L1 +BSN L2] AS [6 mo] [BSN L3] AS [6 mo] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 0.3648 cfs Peak Time• 8.00 hrs Hyd Vol. 5443.3 cf - 0.1250 acft ADDHYD [BSN L1 +BSN L2] AS [2 yr] [BSN L3] AS [2 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 0.6137 cfs Peak Time: 8.00 hrs Hyd Vol. 9241.71 cf - 0.2121 acft ADDHYD [BSN L1 +BSN L2] AS [10 yr] [BSN L3] AS [10 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow 0 9682 cfs Peak Time: 8 00 hrs Hyd Vol: 14672.19 cf - 0.3368 acft ADDHYD [BSN L1 +BSN L2] AS [25 yr] [BSN L3] AS [25 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow. 1.1471 cfs Peak Time: 8.00 hrs Hyd Vol 17425.68 cf - 0.3783 acft ADDHYD [BSN L1 +BSN L2] AS [50 yr] [BSN L3] AS [50 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 1.2368 cfs Peak Time: 8.00 hrs Hyd Vol 18808.28 cf - 0.4318 acft ADDHYD [BSN L1 +BSN L2] AS [100 yr] [BSN L3] AS [100 yr] TO [BSN L1 +BSN L2 +BSN L3] Peak Flow: 1 3231 cfs Peak Time: 8.00 hrs Hyd Vol. 20194.22 cf - 0.4636 acft Hydrograph ID: BASIN L Area: 1.5707 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 1.3231 cfs Peak Time: 8.00 hrs Hyd Vol: 0.4636 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0042 8.83 0 4862 16 83 0 1836 0.83 0 0165 9 00 0 4808 17 00 0 1837 1 00 0 0313 9 17 0 4187 17 17 0 1776 1 17 0.0483 9 33 0 3639 17 33 0 1720 1 33 0 0648 9 50 0.3624 17 50 0.1719 1 50 0.0764 9 67 0 3415 17.67 0 1716 1 67 0 0893 9 83 0 3258 17 83 0 1717 1 83 0 1008 10 00 0 3251 18 00 0 1716 2.00 0 1085 10 17 0 3066 18 17 0 1656 2 17 0.1187 10 33 0 2902 18 33 0.1599 2 33 0 1282 10 50 0 2899 18 50 0 1599 2 50 0 1335 10 67 0.2771 18 67 0 1595 2.67 0 1380 10 83 0 2663 18.83 0 1596 2 83 0 1418 11 00 0 2661 19 00 0 1596 3 00 0 1451 11 17 0 2596 19 17 0 1535 3 17 0 1479 11.33 0 2543 19 33 0 1478 3 33 0.1504 11 50 0 2542 19 50 0 1478 3.50 0 1526 11.67 0 2480 19 67 0.1474 3 67 0 1593 11 83 0.2426 19 83 0 1475 3 83 0 1657 12 00 0 2425 20.00 0.1475 4 00 0 1677 12 17 0.2363 20 17 0 1475 4 17 0 1791 12 33 0 2308 20 33 0 1475 4 33 0 1901 12 50 0 2308 20 50 0 1476 4 50 0 1922 12 67 0 2245 20 67 0 1476 4 67 0 2039 12.83 0 2190 20 83 0.1476 4 83 0 2150 13 00 0.2189 21 00 0 1476 5 00 0 2177 13.17 0 2187 21.17 0 1477 5 17 0 2301 13 33 0 2188 21 33 0 1477 5 33 0 2418 13 50 0 2189 21 50 0 1477 5 50 0.2443 13.67 0 2129 21 67 0.1477 5 67 0 2568 13 83 0 2074 21 83 0 1478 5.83 0.2686 14 00 0 2073 22.00 0 1478 6 00 0 2709 14 17 0.2070 22 17 0 1416 6.17 0 2943 14 33 0 2072 22 33 0 1360 6.33 0 3165 14 50 0 2072 22 50 0.1359 6 50 0 3194 14 67 0 2012 22.67 0 1355 6 67 0 3547 14 83 0 1956 22 83 0.1356 6 83 0 3878 15 00 0.1956 23 00 0 1356 7 00 0 3915 15 17 0.1953 23 17 0 1356 7 17 0 4339 15 33 0 1954 23 33 0 1356 7 33 0 4729 15 50 0 1954 23 50 0 1356 7 50 0 4771 15 67 0 1894 23 67 0.1357 7 67 0 8947 15 83 0.1838 23 83 0 1357 7 g3 1 2958 16 00 0 1837 24 00 0 1357 8 00 1 3231 16.17 0 1834 24 17 0 0676 8 17 1 0054 16 33 0.1835 24 33 0 0091 8 33 0 6764 16 50 0 1835 24.50 0.0021 8 50 0 6718 16 67 0 1836 24 67 0 0005 8 67 0 5632 16 83 0 1836 24 83 0 0001 Area: 1.5707 ac Hyd Int~ 10 00 min Base Flow. MOVEHYD [BASIN L] TO [BASIN L - 6 mo] AS [6 mo] Peak Flow. 0.3648 cfs Peak Time. 8 00 hrs Hyd Vol: 5443.3 cf - 0.1250 acft MOVEHYD [BASIN L] TO [BASIN L -100 yr] AS [100 yr] Peak Flow 1 3231 cfs Peak Time: 8.00 hrs Hyd Vol: 20194.22 cf - 0 4636 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Bottom and Sides Start EI Max EI Increment 324.0000 ft 328.0000 ft 0.10 Infll: 10 00 In/hr Multiplier: 1.00 Reach ID: BIOSWALE L Section Prop erties: Shape: Ditch Routing Method. Travel Tlme Translation Size Material Mannings n Hyd params By Corr Metal -normal 0.0250 Mannings Formula Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 ss2 12.0000 ft 3.0000 ft 3.OOh:1 v 3.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY M 0.0000 ft 0.0000 ft ROUTEHYD (BASIN L - 6 mo] THRU [BIOSWALE L] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE M 1 5707 0 3648 ---- 1 00 0 0969 Ditch 0 5681 ----- BASIN M ROUTEHYD [BASIN L -100 yr] THRU [BIOSWALE L] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fl/el CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE L 1 5707 1 3231 ---- 1.00 0 2234 Ditch 0 8964 ----- BASIN L Node ID: INFILTRATION L Desc: Bottom and Sides Start EI: 324.0000 ft Max EI: 329.0000 ft Contrib Basin: Contrib Hyd: Length Width Void Ratio 200.0000 ft 12.0000 ft 39.00 Bottom area only with Infiltration COMPUTE (BASIN L] SUMMARY 100 yr MatchQ=PeakO= 1.3231 cfs Peak Out Q. 0 8732 cfs -Peak Stg. 330 49 ft -Active Vol: 2465.17 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -K Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin K Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 DEVELOPED LAND USE Basin Basin K Flows To Bio-Infiltration Swale K Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale K Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 250ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.033 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraula.c Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 330.3 0.057 0.000 0.000 0.000 330.4 0.060 0.005 0.000 0.579 330.5 0.063 0.009 0.000 0.579 330.5 0.066 0.019 0.000 0.579 330.6 0.069 0.020 0.000 0.579 `J~s~ < ~~;~G ~f ~~ggPH bq~~ of wAS~ l q~~~ (cT ~ ~ ~ jy5~5 ^~ ~' w ~+RFoisi ~~~p `~i~, '~ ~`OIYAL ~~ 09,~~.-~ °° ss ~~ Eic~r(~s: ~)-zz-Ob 330.7 0.071 0.025 0.000 0.579 330.8 0.074 0.031 0.000 0.579 330.8 0.077 0.037 0.411 0.579 330.9 0.080 0.043 1.873 0.579 331.0 0.083 0.049 3.920 0.579 331.1 0.086 0.056 6.416 0.579 331.2 0.089 0.062 9.292 0.579 331.2 0.092 0.069 12.50 0.579 331.3 0.094 0.077 16.01 0.579 331.4 0.097 0.084 19.81 0.579 331.5 0.100 0.092 23.86 0.579 331.5 0.103 0.100 28.15 0.579 331.6 0.106 0.108 32.67 0.579 331.7 0.109 0.116 37.42 0.5'79 331.8 0.112 0.125 42.37 0.579 331.9 0.115 0.134 47.53 0.579 331.9 0.118 0.143 52.88 0.579 332.0 0.121 0.152 58.41 0.579 332.1 0.124 0.162 64.13 0.579 332.2 0.127 0.171 70.02 0.579 332.2 0.130 0.181 76.08 0.579 332.3 0.133 0.192 82.31 0.579 332.4 0.136 0.202 88.70 0.579 332.5 0.139 0.213 95.24 0.579 332.6 0.142 0.224 101.9 0.579 332.6 0.145 0.235 108.8 0.579 332.7 0.149 0.246 115.8 0.579 332.8 0.152 0.2_58 122.9 0.579 332.9 0.155 0.270 130.2 0.579 332.9 0.158 0.282 137.6 0.579 333.0 0.161 0.294 145.2 0.579 333.1 0.164 0.307 152.9 0.579 333.2 0.167 0.320 160.7 0.579 333.3 0.170 0.333 168.6 0.579 333.3 0.174 0.347 176.7 0.579 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.539322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932428 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.534322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932428 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-NLitigated Year Predeveloped Developed 1956 0.503 0.000 1957 0.815 0.178 1958 0.468 0.000 1959 0.547 0.000 1960 0.602 0.000 1961 0.400 0.000 1962 0.432 0.000 1963 0.866 0.079 1964 0.630 0.000 1965 0.590 0.000 1966 0.416 0.000 1967 0.507 0.000 1968 0.399 0.000 1969 0.394 0.000 1970 0.393 0.000 1971 0.489 0.000 1972 0.580 0.000 1973 0.963 0.000 1974 0.539 0.000 1975 0.467 0.000 1976 0.537 0.000 1977 0.680 0.000 1978 0.578 0.000 1979 0.688 0.000 1980 0.516 0.000 1981 0.590 0.000 1982 0.682 0.000 1983 0.730 0.053 1984 0.445 0.000 1985 0.515 0.000 1986 0.573 0.000 1987 0.613 0.000 1988 0.341 0.000 1989 0.409 0.000 1990 0.804 0.118 1991 0.810 0.077 1992 0.502 0.000 1993 0.368 0.000 1994 0.409 0.000 1995 0.592 0.000 1996 0.601 0.000 1997 0.484 0.000 1998 0.678 0.000 1999 0.582 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8148 0.1180 2 0.8098 0.0790 3 0.8041 0.0766 4 0.7302 0.0525 5 0.6879 0.0000 6 0.6821 0.0000 7 0.6802 0.0000 8 0.6779 0.0000 9 ~ 0.6298 0.0000 10 0.6127 0.0000 11 0.6022 0.0000 12 0.6006 0.0000 13 0.5917 0.0000 14 0.5905 0.0000 15 0.5899 0.0000 16 0.5823 0.0000 17 0.5803 0.0000 18 0.5779 0.0000 19 0.5728 0.0000 20 0.5971 0.0000 21 0.5388 0.0000 22 0.5373 0.0000 23 0.5159 0.0000 29 0.5153 0.0000 25 0.5068 0.0000 26 0.5033 0.0000 27 0.5018 0.0000 28 0.4887 0.0000 29 0.4839 0.0000 30 0.4682 0.0000 31 0.4668 0.0000 32 0.4627 0.0000 33 0.4453 0.0000 34 0.9321 0.0000 35 0.4161 0.0000 36 0.4086 0.0000 37 0.4085 0.0000 38 0.4003 0.0000 39 0.3986 0.0000 40 0.3940 0.0000 41 0.3935 0.0000 42 0.3677 0.0000 43 0.3415 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2672 1046 0 .0 Pass 0.2733 976 0 .0 Pass 0.2794 911 0 .0 Pass 0.2855 843 0 .0 Pass 0.2916 788 0 .0 Pass 0.2977 720 0 .0 Pass 0.3038 671 0 .0 Pass 0.3099 624 0 .0 Pass 0.3160 582 0 .0 Pass 0.3221 536 0 .0 Pass 0.3282 498 0 .0 Pass 0.3343 460 0 .0 Pass 0.3404 434 0 .0 Pass 0.3465 399 0 .0 Pass 0.3526 364 0 .0 Pass 0.3587 391 0 .0 Pass 0.3649 315 0 .0 Pass 0.3710 297 0 .0 Pass 0.3771 278 0 .0 Pass 0.3832 254 0 .0 Pass 0.3893 240 0 .0 Pass 0.3954 223 0 .0 Pass 0.4015 202 0 .0 Pass 0.4076 190 0 .0 Pass 0.4137 174 0 .0 Pass 0.4198 168 0 .0 Pass 0.4259 161 0 .0 Pass 0.4320 155 0 .0 Pass 0.4381 147 0 .0 Pass 0.4492 142 0 .0 Pass 0.4503 138 0 .0 Pass 0.4569 136 0 .0 Pass 0.4625 129 0 .0 Pass 0.4686 117 0 .0 Pass 0.4748 109 0 .0 Pass 0.9809 104 0 .0 Pass 0.4870 98 0 .0 Pass 0.4931 90 0 .0 Pass 0.4992 87 0 .0 Pass 0.5053 82 0 .0 Pass 0.5114 79 0 .0 Pass 0.5175 67 0 .0 Pass 0.5236 66 0 .0 Pass 0.5297 61 0 .0 Pass 0.5358 59 0 .0 Pass 0.5419 55 0 .0 Pass 0.5480 50 0 .0 Pass 0.5541 46 0 .0 Pass 0.5602 46 0 .0 Pass 0.5663 41 0 .0 Pass 0.5724 38 0 .0 Pass 0.5786 36 0 .0 Pass 0.5847 34 0 .0 Pass 0.5908 29 0 .0 Pass 0.5969 26 0 .0 Pass 0.6030 24 0 .0 Pass 0.6091 23 0 .0 Pass 0.6152 19 0 .0 Pass 0.6213 19 0 .0 Pass 0.6274 18 0 .0 Pass 0.6335 16 0 .0 Pass 0.6396 16 0 .0 Pass 0.6457 16 0 .0 Pass 0.6518 15 0 .0 Pass 0.6579 14 0 .0 Pass 0.6640 12 0 .0 Pass 0.6701 12 0 .0 Pass 0.6762 12 0 .0 Pass 0.6823 10 0 .0 Pass 0.6885 8 0 .0 Pass 0.6946 8 0 .0 Pass 0.7007 8 0 .0 Pass 0.7068 8 0 .0 Pass 0.7129 7 0 .0 Pass 0.7190 6 0 .0 Pass 0.7251 6 0 .0 Pass 0.7312 5 0 .0 Pass 0.7373 5 0 .0 Pass 0.7434 5 0 .0 Pass 0.7495 5 0 .0 Pass 0.7556 5 0 .0 Pass 0.7617 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7739 5 0 .0 Pass 0.7800 5 0 .0 Pass 0.7861 5 0 .0 Pass 0.7922 5 0 .0 Pass 0.7984 5 0 .0 Pass 0.8045 5 0 .0 Pass 0.8106 3 0 .0 Pass 0.8167 1 0 .0 Pass 0.8228 1 0 .0 Pass 0.8289 1 0 .0 Pass 0.8350 1 0 .0 Pass 0.8911 1 0 .0 Pass 0.8472 1 0 .0 Pass 0.8533 1 0 .0 Pass 0.8594 1 0 .0 Pass 0.8655 1 0 .0 Pass 0.8716 0 0 .0 Pass Water Quala.ty BMP Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.17 cfs. Adjusted for 15 min: 0.2 cfs. Off-lane facility target flow: 0.12 cfs. Adjusted for 15 ma.n: 0.14 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or Implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 10.U kkkkxkkkkkkkkdCiS+.~S+9~Y.~?MO?OOskkkkkkk~ .~., "~ 1.0 xnoar,*~ooaooo~a ~ ~¢oooaoo" L o Predeveloped ~ ~pE_~ x De~reloped M>t~gated u, x x y! x G1 10E-2 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart --- TEAR FLptq (ct~ _.._._ 100> 0324 --- -- , ~ Og7 ____~ _ _~ ~ .oPredeve~:d_~_ ______ 50 ~ 8716 -~-Y; ,, , ~ , ~ ° ~ ° ~ ~. ~ ~ ~ x DeveMped w~h Facility _ , ,~ 25 ~ 8092 ..._...~.~..~ ~ ; ~ , ~ _ ~ ........... ~ . ~ ...~ ... ~ ~ w _ ~_ 'j'' 072 i ~~tr3 3 10 7223 `- `~ 11~ ~ 057 ~ - . __ ~_ __~_ ___ .0504 ~ "`;~" ~ ~ ~' 042 _____ __~ ~ _____~ _ __ _.~______ ~z 2 ,5343 ,, ~ ~ j ~ ~~ ~ ~ 0 27 -- - - - _. ~ _ _ _.._ _ ~_ ~„_ __ __ _ _ ~7 i'i ~~~ ~°~1 F ~ ~ Y N '~; ~ ~ 3 ~ ; ~ ; , , 10E-5 a 10E•4 10E•3 1UE•2 10E•1 1 10 Percent ~xceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR fL04V {cts) 100 1138 ___ _ _ _ _ , ~ ~ iii ?3 i~`' } ~ ( ~; ~I~ E 50 7701 ; ;~~ { 33 ~~~~ i 25 `5 ~ ~ i i ~~ ~( t: s 1p 2081 `.~._'! i.._..,~a,...; ~ , ; l _ i°t ~ ~~ 3 5 °1518 '~f`;; '" ~ ~' '~1 7 5459 _-`_ = i 'early Peaks for Developed W/Pond CLEARHIS BSN K1 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN K1 0 06 7 83 BSN K1 0 10 7 83 BSN K1 0 16 7 83 BSN K1 0 19 7 83 BSN K1 0 21 7 83 BSN K1 0 23 7 83 yr Drainage Area: BSN K1 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0.0744 ac 78.00 Impervious 0.2016 ac 98.00 Total 0.2760 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN K2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K2 0.10 8 00 BSN K2 0 18 8 00 BSN K2 0 28 8 00 BSN K2 0 34 8 00 BSN K2 0 36 8 00 BSN K2 0 39 8 00 yr Drainage Area: BSN K2 Hyd Method SBUH Hyd Peak Factor 484 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0188 0 28 SBUH/SCS TYPE1A 6 mo 0 0328 0 28 SBUH/SCS TYPEIA 2 yr 0 0535 0 28 SBUH/SCS TYPEIA 10 yr 0 0642 0 28 SBUH/SCS TYPEIA 25 yr 0 0696 0 28 SBUH/SCS TYPE1A 50 yr 0 0750 0 28 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs 0 20 Intv. 10 00 min TC 0.03 hrs 0.04 hrs 0.0744 ac 0 1240 ac 0.0202 ac 0 0574 ac Length. Slope. Coeff• Travel Time 6.00 ft 2 00% 0 2400 1.90 min Length• Slope: Coeff• Travel Time 126.00 ft 1 19% 27 0000 0 71 min 1850 ft 200% 00110 040 mm 68.00 ft 0 50% 21.0000 0 76 min 5 00 ft 2 00% 0 0110 0 14 min 20 00 ft 2 00% 0.0110 0 42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0356 0 48 SBUHlSCS TYPEIA 6 mo 0 0613 0 48 SBUH/SCS TYPE1A 2 yr 0 0986 0 48 SBUH/SCS TYPEIA 10 yr 0 1176 0 48 SBUH/SCS TYPEIA 25 yr 0 1272 0 48 SBUH/SCS TYPEIA 50 yr 0 1368 0 48 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs. 0 20 Storm Dur: 24.00 hrs Area CN Pervious 0.0938 ac 78.00 Impervious 0.3890 ac 98.00 Total 0.4828 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type' Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K3 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K3 0 09 7 83 BSN K3 0 15 7 83 BSN K3 0 24 7 83 BSN K3 0 29 7 83 BSN K3 0 31 7 83 BSN K3 0 34 7 83 yr Drainage Area: BSN K3 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.1009 ac 78 00 Impervious 0.3013 ac 98.00 Total 0.4022 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDEWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Inty• TC 0.03 hrs 0.12 hrs 0.0938 ac 0 2966 ac 0 0350 ac 0.0574 ac 10.00 min Length: Slope: Coeff• Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length. Slope. Coeff: Travel Time 315.00 ft 0.56% 27 0000 2.60 min 18 50 ft 2.00% 0 0110 0.40 min 340.00 ft 0 50% 21.0000 3.82 min 5 00 ft 2 00% 0.0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0279 0 40 SBUH/SCS TYPEIA 6 mo 0 0486 0 40 SBUH/SCS TYPEIA 2 yr 0 0790 0 40 SBUH/SCS TYPE1A 10 yr 0 0946 0 40 SBUH/SCS TYPEIA 25 yr 0 1025 0 40 SBUH/SCS TYPEIA 50 yr 0 1104 0 40 SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs 0 20 Intv• 10 00 min TC 0.03 hrs 0 04 hrs 0.1009 ac 0.2143 ac 0 0296 ac 0 0574 ac Length• Slope Coeff: Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length: Slope: Coeff: Travel Time 265.00 ft 1.58% 27 0000 1.30 mm 18.50 ft 2 00% 0.0110 0.40 mm Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K4 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K4 0 05 7 83 BSN K4 0 09 7 83 BSN K4 0 15 7 83 BSN K4 0 17 7 83 BSN K4 0 19 7 83 BSN K4 0 20 7.83 yr Drainage Area: BSN K4 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0282 ac 78 00 Impervious 0.1926 ac 98.00 Total 0.2208 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Wat er Pipe Sheet Across Sidewalks BSN K5 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN K5 0 15 8 00 BSN K5 0 25 8 00 BSN K5 0 39 8 00 BSN K5 0 46 8 00 BSN K5 0 49 8 00 BSN K5 0 53 8 00 yr Drainage Area: BSN K5 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur 24.00 hrs Area CN 60.00 ft 0.50% 21 0000 0.67 min 5.00 ft 2.00% 0 0110 0.14 min Peak Vol Area (ac-ft) ac 0 0174 0 22 0 0296 0 22 0 0471 0 22 0 0560 0 22 0 0604 0 22 0 0649 0 22 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPE1A 2 yr SBUH/SCS TYPE1A 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs. 0 20 Intv: 10 00 min TC 0.03 hrs 0.04 hrs 0.0282 ac 0 1493 ac 0.0204 ac 0.0229 ac Length: Slope. Coeff Travel Time 6.00 ft 2.00% 0.2400 1 90 min Length• Slope: Coeff: Travel Time 175.00 ft 0.73% 27.0000 1.26 min 18 50 ft 2 00% 0.0110 0.40 min 50 00 ft 0.50% 21 0000 0.56 min 5.00 ft 2.00% 0 0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0497 0 62 SBUH/SCS TYPEIA 6 mo 0 0844 0 62 SBUH/SCS TYPE1A 2 yr 0 1339 0 62 SBUH/SCS TYPEIA 10 yr 0 1590 0 62 SBUH/SCS TYPEIA 25 yr 0 1716 0 62 SBUH/SCS TYPEIA 50 yr 0 1843 0 62 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs 0 20 Intv 10 00 min TC Pervious 0 0721 ac 78 00 0.03 hrs Impervious 0 5512 ac 98 00 0.11 hrs Total 0.6233 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0 0721 ac Impervious CN Data: ROADWAY 98 00 0 3257 ac SIDWALK 98.00 0.1452 ac DRIVEWAY 98.00 0.0803 ac Pervious TC Data: Flow type: Description: Length• Slope. Coeff. Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type Description• Length: Slope• Coeff. Travel Time Shallow Along Flow Line of Gutter 268 00 ft 0 50% 27.0000 3 11 mm Sheet Across Roadway 27 00 ft 2.00% 0.0110 0 54 min Channel Through Strom Water Pipe 255.00 ft 0.50% 21 0000 2 86 min Sheet Across Sidewalks 12.00 ft 2.00% 0 0110 0 28 min ADDHYD [BSN K1] AS [6 mo] (BSN K2] AS [6 mo] TO (BSN K1 +BSN K2] Peak Flow 0.1560 cfs Peak Time 8 00 hrs Hyd Vol: 2369.71 cf - 0.0544 acft ADDHYD [BSN K1] AS [2 yr] [BSN K2] AS [2 yr] TO [BSN K1 +BSN K2] Peak Flow: 0.2683 cfs Peak Time: 8.00 hrs Hyd Vol. 4099.86 cf - 0.0941 acft ADDHYD [BSN K1] AS [10 yrJ [BSN K2] AS [10 yr] TO [BSN K1 +BSN K2] Peak Flow 0 4331 cfs Peak Time: 8 00 hrs Hyd Vol: 6624.56 cf - 0 1521 acft ADDHYD [BSN K1] AS [25 yr] [BSN K2] AS (25 yr] TO [BSN K1 +BSN K2] Peak Flow• 0 5173 cfs Peak Time 8 00 hrs Hyd Vol 7918.22 cf - 0 1818 acft ADDHYD [BSN K1] AS [50 yr] [BSN K2] AS (50 yr] TO [BSN K1 +BSN K2] Peak Flow• 0.5598 cfs Peak Time 8.00 hrs Hyd Vol. 8570 03 cf - 0.1967 acft ADDHYD [BSN K1] AS [100 yr] [BSN K2] AS [100 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 6024 cfs Peak Time• 8 00 hrs Hyd Vol: 9224.90 cf - 0 2118 acft ADDHYD [BSN K3] AS [6 mo] [BSN K4] AS [6 mo] TO [BSN K3 +BSN K4] Peak Flow 0 1397 cfs Peak Time 7 83 hrs Hyd Vol. 1976 00 cf - 0.0454 acft ADDHYD [BSN K3] AS [2 yr] [BSN K4] AS [2 yr] TO [BSN K3 +BSN K4] Peak Flow. 0.2381 cfs Peak Time: 7 83 hrs Hyd Vol: 3408.91 cf - 0 0783 acft ADDHYD [BSN K3] AS [10 yr] [BSN K4] AS [10 yr] TO [BSN K3 +BSN K4] Peak Flow 0.3848 cfs Peak Time 7 83 hrs Hyd Vol• 5493.47 cf - 0 1261 acft ADDHYD [BSN K3] AS [25 yr] [BSN K4J AS [25 yr] TO [BSN K3 +BSN K4] Peak Flow: 0.4598 cfs Peak Time: 7.83 hrs Hyd Vol: 6560.11 cf - 0.1506 acft ADDHYD [BSN K3] AS [50 yr] [BSN K4] AS [50 yr] TO [BSN K3 +BSN K4] Peak Flow: 0 4977 cfs Peak Time 7 83 hrs Hyd Vol: 7097 15 cf - 0 1629 acft ADDHYD [BSN K3] AS [100 yr] [BSN K4] AS [100 yr] TO [BSN K3 +BSN K4] Peak Flow 0 5356 cfs Peak Time: 7 83 hrs Hyd Vol 7636 58 cf - 0.1753 acft MOVEHYD [BSN K5] TO (BSN K5 - 6 mo] AS [6 mo] Peak Flow 0.1461 cfs Peak Time 8.00 hrs Hyd Vol 2166 67 cf - 0 0497 acft MOVEHYD [BSN K5] TO (BSN K5 - 2 yr] AS [2 yr] Peak Flow: 0.2459 cfs Peak Time: 8.00 hrs Hyd Vol. 3676.63 cf - 0.0844 acft MOVEHYD (BSN K5] TO [BSN K5 -10 yr] AS [10 yr] Peak Flow 0.3872 cfs Peak Time 8.00 hrs Hyd Vol 5834.09 cf - 0 1339 acft MOVEHYD [BSN K5] TO [BSN K5 - 25 yr] AS [25 yr] Peak Flow: 0 4583 cfs Peak Time: 8.00 hrs Hyd Vol 6927.65 cf - 0.1590 acft MOVEHYD [BSN K5] TO [BSN K5 - 50 yr] AS [50 yr] Peak Flow: 0 4940 cfs Peak Time: 8.00 hrs Hyd Vol: 7476 65 cf - 0.1716 acft MOVEHYD [BSN K5] TO [BSN K5 - 100 yr] AS [100 yr] Peak Flow: 0 5297 cfs Peak Time. 8.00 hrs Hyd Vol. 8027 03 cf - 0.1843 acft ADDHYD [BASIN K1-4] AS [6 mo] [BSN K5] AS [6 mo] TO [BASIN K1-4 +BSN K5] Peak Flow: 0 4418 cfs Peak Time: 7.83 hrs Hyd Vol 6512.38 cf - 0 1495 acft ADDHYD [BASIN K1-4] AS [2 yr] [BSN K5] AS [2 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 0.7523 cfs Peak Time. 7.83 hrs Hyd Vol: 11185.4 cf - 0.2568 acft ADDHYD [BASIN K1-4] AS [10 yr] [BSN K5] AS [10 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1.2051 cfs Peak Time. 7.83 hrs Hyd Vol: 17952.12 cf - 0.4121 acft ADDHYD [BASIN K1-4] AS [25 yr] [BSN K5] AS [25 yr] TO [BASIN K1-4 +BSN K5] Peak Flow. 1.4354 cfs Peak Time: 7 83 hrs Hyd Vol: 21405 98 cf - 0.4914 acft ADDHYD [BASIN K1-4] AS [50 yr] [BSN K5] AS [50 yr] TO [BASIN K1-4 +BSN K5] Peak Flow. 1.5515 cfs Peak Time 7 83 hrs Hyd Vol 23143 83 cf - 0.5312 acft ADDHYD [BASIN K1-4] AS [100 yr] [BSN K5] AS (100 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1 6391 cfs Peak Time: 7 83 hrs Hyd Vol. 24888.51 cf - 0.5714 acft Hydrograph ID: BASIN K Area. 2.0051 ac Hyd Int: 10.00 min Base Flow. Peak Flow 1.6391 cfs Peak Time. 7.83 hrs Hyd Vol: 0.5714 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0055 8 67 0 6812 16 50 0 2301 0 83 0 0210 8 83 0 5902 16.67 0 2303 1 00 0 0388 9 00 0 5963 16 83 0 2303 1 17 0 0592 9 17 0 5098 17 00 0 2304 1 33 0 0786 9 33 0 4441 17 17 0 2220 1 50 0 0917 9 50 0 4499 17 33 0 2150 1 67 0 1071 9 67 0 4211 17 50 0 2158 1 83 0 1206 9 83 0 4025 17 67 0 2153 2 00 0 1291 10 00 0 4043 17 83 0 2155 2.17 0 1416 10 17 0 3787 18 00 0 2155 2 33 0 1526 10 33 0 3589 18.17 0 2070 2 50 0 1584 10 50 0 3609 18 33 0 2000 2 67 0 1637 10 67 0 3432 18 50 0 2008 2 83 0 1681 10 83 0 3302 18 67 0 2003 3 00 0 1719 11 00 0 3316 18 83 0 2005 3 17 0 1752 11 17 0 3226 19 00 0 2005 3 33 0 1781 11 33 0 3162 19 17 0 1920 3 50 0 1807 11 50 0 3170 19 33 0 1850 3 67 0 1891 11 67 0 3084 19 50 0 1857 3 83 0 1966 11 83 0 3019 19 67 0 1852 4 00 0 1984 12 00 0 3027 19 83 0 1854 4 17 0 2131 12 17 0 2940 20 00 0 1854 4 33 0 2260 12 33 0 2875 20 17 0 1855 4 50 0 2274 12 50 0 2882 20 33 0 1855 4 67 0 2425 12 67 0 2795 20 50 0 1855 4 83 0 2559 12 83 0 2729 20 67 0 1856 5 00 0 2582 13 00 0 2736 20 83 0 1856 5 17 0 2748 13 17 0 2733 21 00 0 1857 5 33 0 2890 13 33 0 2736 21 17 0 1857 5 50 0 2912 13 50 0 2737 21 33 0 1858 5 67 0 3082 13 67 0 2655 21 50 0 1858 5 83 0 3226 13 83 0 2586 21 67 0 1859 6 00 0 3246 14 00 0 2594 21 83 0.1859 6 17 0 3560 14 17 0 2590 22 00 0 1860 6 33 0 3831 14 33 0 2593 22 17 0 1774 6 50 0 3847 14 50 0 2594 22 33 0 1703 6 67 0 4324 14 67 0 2511 22 50 0 1710 6 83 0 4728 14 83 0 2442 22 67 0.1705 7 00 0 4741 15 00 0 2450 22 83 0 1707 7 17 0 5318 15 17 0 2445 23 00 0 1707 7 33 0 5796 15 33 0 2448 23 17 0 1707 7 50 0 5808 15 50 0 2449 23 33 0.1707 7 67 1 1475 15 67 0 2365 23 50 0 1708 7 83 1 6391 15 83 0 2296 23 67 0 1708 8 00 1 6272 16 00 0 2303 23 83 0 1709 8 17 1.1967 16 17 0 2299 24 00 0 1709 8 33 0 7919 16 33 0 2301 24 17 0 0756 8 50 0 8304 16 50 0 2301 24 33 0 0075 Hydrograph ID: BASIN K Area: 2.0051 ac Hyd Int: 10 00 min Base Flow• Peak Flow: 1 6391 cfs Peak Time• 7.83 hrs Hyd Vol• 0.5714 acft MOVEHYD [BASIN K] TO [BASIN K - 6 mo] AS [6 mo] Peak Flow• 0.4418 cfs Peak Time. 7 83 hrs Hyd Vol 6512 38 cf - 0 1495 acft MOVEHYD (BASIN K] TO [BASIN K - 100 yr] AS [100 yr] Peak Flow: 1.6391 cfs Peak Time. 7.83 hrs Hyd Vol 24888.51 cf - 0 5714 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp. Multiple Orifice Start EI Max EI Increment 325.0000 ft 330.8000 ft 0.10 Infd: 10.00 m/hr Multiplier 1.00 Reach ID: BIOSWALE K Section Properties: Shape Ditch Slze Material Manrnngs n Corr Metal -n ormal Length Slope Entrance Loss 250.0000 ft 0 50 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY K 0.0000 ft Conduit Constraints: Mln Vel Max Vel Min Cov 0 50000 ft 1.0000 ft 3 0000 ft In/Exfll Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Tnb Area Flow Capacity 0.0000 ac 0.0000 cf 0 0000 cf Ent Loss Exlt Loss Frlct Loss 0.000000 ft 0.000000 ft 0 000000 ft Routing Method Travel Time Translation Hyd params By 0.0250 Manrnngs Formula ss2 3.OOh:1 v Dn Invert 0 0000 ft Mln Slope Max Slope Mln drop 0.5000 ft 2 0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN K - 6 MO] THRU [BIOSWALE K] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ftls ft/s ---------- BIOSWALE K 2 0051 0 4418 ---- 1 00 0 1948 Ditch 0 6737 ----- BASIN K ROUTEHYD [BASIN K - 100 YR] THRU [BIOSWALE K] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE K 2 0051 1 6391 ---- 1 00 0 3423 Ditch 0 9930 ----- BASIN K Node ID: INFILTRATION K Desc Manhole structure Start EI: 330.8000 ft Max EI 331 8000 ft Contnb Basin: Contnb Hyd. Length Width Void Ratio 250.0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN K RLP Desc: Manhole structure Start EI: 330.8000 ft Max EI. 331 8000 ft Contnb Basin: BASIN K Contnb Hyd Storage Id. INFILTRATION K Discharge Id. INFILTRATION RLPCOMPUTE [BASIN K RLP] SUMMARY 100 YR MatchQ=PeakO= 1.6391 cfs Peak Out Q: 1.0818 cfs -Peak Stg~ 331 61 ft -Active Vol. 2342.43 cf ¢' WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT v Project Name: Tahoma Terra_BASIN -K Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin K Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.69 IMPERVIOUS: 2.13 DEVELOPED LAND USE Basin Basin K Flows To Bio-Infiltration Swale K Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale K Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raan / Evap as not activated. n; .,,e., ~ , ,.., Depth: aft. Bottom Length: 250ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.033 acre-ft. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infa.lt(cfs) 330.3 0.057 0.000 0.000 0.000 330.4 0.060 0.005 0.000 0.579 330.5 0.063 0.009 0.000 0.579 330.5 0.066 0.014 0.000 0.579 330.6 0.069 0.020 0.000 0.579 ~~> ~ ~ ~~ ~ <(/~~ ~~gEPH D,q~"~ of WASH rl ~~`~ t°~ 4 ~ i 3.35?S ~ ~' ~~C/STEKw~~ SCE k •C' .4 f ~,~~ Og.-r'-~ EXPIRFS:11- Q +~+.rr~ra~s , .,.~,,,,e 30.7 0.071 0.025 0.000 0.579 330.8 0.074 0.031 0.000 0.579 130.8 0.077 0.037 0.411 0.579 330.9 0.080 0.043 1.873 0.579 331.0 0.083 0.049 3.920 0.579 331.1 0.086 0.056 6.416 0.579 331.2 0.089 0.062 9.292 0.579 331.2 0.092 0.069 12.50 0.579 331.3 0.094 0.077 16.01 0.579 331.4 0.097 0.084 19.81 0.579 331.5 0.100 0.092 23.86 0.579 331.5 0.103 0.100 28.15 0.579 331.6 0.106 0.108 32.67 0.579 331.7 0.109 0.116 37.92 0.579 331.8 0.112 0.125 92.37 0.579 331.9 0.115 0.134 47.53 0.579 331.9 0.118 0.143 52.88 0.579 332.0 0.121 0.152 58.41 0.579 332.1 0.124 0.162 64.13 0.579 332.2 0.127 0.171 70.02 0.579 33?_.2 0.130 0.181 76.08 0.579 332.3 0.133 0.192 82.31 0.579 332.4 0.136 0.202 88.70 0.579 332.5 0.139 0.213 95.29 0.579 332.6 0.142 0.224 101.9 0.579 332.6 0.145 0.235 108.8 0.579 332."7 0.149 0.246 115.8 0.579 332.8 0.152 0.258 122.9 0.579 332.9 0.155 0.270 130.2 0.579 332.9 0.158 0.282 137.6 0.579 333.0 0.161 0.294 145.2 0.579 333.1 0.164 0.307 152.9 0.579 333.2 0.167 0.320 160.7 0.579 333.3 0.170 0.333 168.6 0.579 333.3 0.174 0.347 176.7 0.579 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.534322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932928 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.534322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932428 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.503 0.000 1957 0.815 0.178 1958 0.468 0.000 1959 0.597 0.000 1960 0.602 0.000 1961 0.400 0.000 1962 0.432 0.000 1963 0.866 0.079 1964 0.630 0.000 1965 0.590 0.000 1966 0.416 0.000 1967 0.507 0.000 1968 0.399 0.000 1969 0.394 0.000 1970 0.393 0.000 1971 0.489 0.000 1972 0.580 0.000 1973 0.463 0.000 1974 0.539 0.000 1975 0.967 0.000 1976 0.537 0.000 1977 0.680 0.000 1978 0.578 0.000 1979 0.688 0.000 1980 0.516 0.000 1981 0.590 0.000 1982 0.682 0.000 1983 0.730 0.053 1984 0.495 0.000 1985 0.515 0.000 1986 0.573 0.000 1987 0.613 0.000 1988 0.341 0.000 1989 0.909 0.000 1990 0.804 0.118 1991 0.810 0.077 1992 0.502 0.000 1993 0.368 0.000 1994 0.409 0.000 1995 0.592 0.000 1996 0.601 0.000 1997 0.484 0.000 1998 0.678 0.000 1999 0.582 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8148 0.1180 2 0.8098 0.0790 3 0.8091 0.0766 4 0.7302 0.0525 5 0.6879 0.0000 6 0.6821 0.0000 7 0.6802 0.0000 8 0.6779 0.0000 9 0.6298 0.0000 10 0.6127 0.0000 11 0.6022 0.0000 12 0.6006 0.0000 13 0.5917 0.0000 14 0.5905 0.0000 15 0.5899 0.0000 16 0.5823 0.0000 17 0.5803 0.0000 18 0.5779 0.0000 19 0.5728 0.0000 20 0.5471 0.0000 21r~ 0.5388 0.0000 22 0.5373 0.0000 `~3 0.5159 0.0000 24 0.5153 0.0000 25 0.5068 0.0000 26 0.5033 0.0000 27 0.5018 0.0000 28 0.4887 0.0000 29 0.4839 0.0000 30 0.4682 0.0000 31 0.4668 0.0000 32 0.4627 0.0000 33 0.9953 0.0000 34 0.9321 0.0000 35 0.4161 0.0000 36 0.4086 0.0000 37 0.4085 0.0000 38 0.4003 0.0000 39 0.3986 0.0000 40 0.3940 0.0000 41 0.3935 0.0000 42 0.3677 0.0000 43 0.3415 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2672 1046 0 .0 Pass 0.2733 976 0 .0 Pass 0.2794 911 0 .0 Pass 0.2855 843 0 .0 Pass 0.2916 788 0 .0 Pass 0.2977 720 0 .0 Pass 0.3038 671 0 .0 Pass 0.3099 624 0 .0 Pass 0.3160 582 0 .0 Pass 0.3221 536 0 .0 Pass 0.3282 498 0 .0 Pass 0.3343 460 0 .0 Pass 0.3404 434 0 .0 Pass 0.3465 399 0 .0 Pass 0.3526 364 0 .0 Pass 0.3587 341 0 .0 Pass 0.3649 315 0 .0 Pass 0.3710 297 0 .0 Pass 0.3771 278 0 .0 Pass 0.3832 254 0 .0 Pass 0.3893 240 0 .0 Pass 0.3954 223 0 .0 Pass 0.4015 202 0 .0 Pass 0.4076 190 0 .0 Pass 0.4137 174 0 .0 Pass 0.4198 168 0 .0 Pass 0.4259 161 0 .0 Pass 0.4320 155 0 .0 Pass 0.4381 147 0 .0 Pass 0.4442 142 0 .0 Pass 0.4503 138 0 .0 Pass 0.9564 136 0 .0 Pass 0.9625 124 0 .0 Pass 0.4686 117 0 .0 Pass 0.4748 109 0 .0 Pass 0.4809 104 0 .0 Pass 0.4870 98 0 .0 Pass 0.4931 90 0 .0 Pass 0.4992 87 0 .0 Pass 0.5053 82 0 .0 Pass 0.5114 74 0 .0 Pass 0.5175 67 0 .0 Pass 0.5236 66 0 .0 Pass 0.'5297 61 0 .0 Pass 0.5358 59 0 .0 Pass 0.5419 55 0 .0 Pass 0.5480 50 0 .0 Pass 0.5541 46 0 .0 Pass 0.5602 46 0 .0 Pass 0.5663 91 0 .0 Pass 0.5724 38 0 .0 Pass 0.5786 36 0 .0 Pass 0.5847 34 0 .0 Pass 0.5908 29 0 .0 Pass 0.5969 26 0 .0 Pass 0.6030 24 0 .0 Pass 0.6091 23 0 .0 Pass 0.6152 19 0 .0 Pass 0.6213 19 0 .0 Pass 0.6274 18 0 .0 Pass 0.6335 16 0 .0 Pass 0.6396 16 0 .0 Pass 0.6457 16 0 .0 Fass 0.6518 15 0 .0 Pass 0.6579 14 0 .0 Pass 0.6640 12 0 .0 Pass 0.6701 12 0 .0 Pass 0.6762 12 0 .0 Pass 0.6823 10 0 .0 Pass 0.6885 8 0 .0 Pass 0.6946 8 0 .0 Pass 0.7007 8 0 .0 Pass 0.7068 8 0 .0 Pass 0.7129 7 0 .0 Pass 0.7190 6 0 .0 Pass 0.7251 6 0 .0 Pass 0.7312 5 0 .0 Pass 0.7373 5 0 .0 Pass 0.7434 5 0 .0 Pass 0.7495 5 0 .0 Pass 0.7556 5 0 .0 Pass 0.7617 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7739 5 0 .0 Pass 0.7800 5 0 .0 Pass 0.7861 5 0 .0 Pass 0.7922 5 0 .0 Pass 0.7984 5 0 .0 Pass 0.8045 5 0 .0 Pass 0.8106 3 0 .0 Pass 0.8167 1 0 .0 Pass 0.8228 1 0 .0 Pass 0.8289 1 0 .0 Pass 0.8350 1 0 .0 Pass 0.8411 1 0 .0 Pass 0.8972 1 0 .0 Pass 0.8533 1 0 .0 Pass 0.8594 1 0 .0 Pass 0.8655 1 0 .0 Pass 0.8716 0 0 .0 Pass Water Quality Bt3P Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.17 cfs. Adjusted for 15 min: 0.2 cfs. Off-line facility target flow: 0.12 cfs Adjusted for 15 min: 0.19 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program rs assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, ether expressed or ~mplred, includrng but not ltmit-ed to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Wash~_ngton State Department of Ecology has been advised of the possibility of such damages. v 1Q~ kkk7xkxkkNkYYYk4ttkW?dti2~"~r.~~D4C40~kkkXXkk7~ .~., v ~~~~ 000 ~ 10 ppp0 ~ np00~o00d'~ ~ o Predeveloped t 10E.1 x Developed Mdigated v xx ~ k C~ 10E-2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart YEAR FLOPI (cis) 1U0 .8324 , ~ 0 87 -_--~ - _._ __n-PredeveM~~~ f d' P d ~ ~ ° 50 8716 , ; ~ , i ~ ` ~ ~ 1 ~ ~ ~ ac t y x Develope w + 25 f aasz ---- ~ 3~ ~ o ~2 .. ~.. ..~ .........~.a. a_ 33 a 0.7223 "' ~ 31 ~ ~ 0 57 _ _ . J 8504 ~ ~ ' ~ r..Y O A~1 _ _"" _ _ _ _ ,..,..... ., __. _ ........ YG ~3 ' 2 .53.3 t + ~ ~ ~ 0.27 - --_ _ ___ . _ .~_.__ _ti ~_ _ ~~_ ~ F ' i / ~ als ~ . {i ~ b ~ O ~ 10E•5 ~ 10E•d 10E•3 10E•2 10E-1 1 10 ~, Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR FLOW (Hs) 100 11 38 ~-~---~-; , ` ~, =1= ;~ ~~~ ~ ~3 3~" ,i ~ i ~ ;i' `~~~ }~ ~`,1' 3 ?~~` ~ 3`1 'so 7ro1 ~ ~~~ ~` ' ~~ i s'( ;i i' '~ R ~ ~ ~~~ ~~~ ~ ~~i ~ ~~ ~ }} f~ ~ ii i, '~, ;~ 90 2.881 y~j ~, ~ '' ~ ~'I `~, 5 _`1.518 ~`~'~ j,z ii ~y [[ 3 i i 3 f dearly Peaks for Developed WlPond CLEARHIS BSN K1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K1 0 06 7 83 BSN K1 0 10 7 83 BSN K1 0 16 7 83 BSN K1 0 19 7 83 BSN K1 0 21 7 83 BSN K1 0 23 7 83 yr Drainage Area: BSN K1 Hyd Method : SBUH Hyd Peak Factor 484 00 Storm Dur. 24 00 hrs Area CN Pervious 0.0744 ac 78 00 Impervious 0 2016 ac 98.00 Total 0.2760 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN K2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K2 0 10 8 00 BSN K2 0 18 8 00 BSN K2 0 28 8 00 BSN K2 0 34 8 00 BSN K2 0 36 8 00 BSN K2 0 39 8 00 yr Drainage Area: BSN K2 Hyd Method: SBUH Hyd Peak Factor: 484.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0188 0 28 SBUH/SCS TYPEIA 6 mo 0 0328 0 28 SBUH/SCS TYPEIA 2 yr 0 0535 0 28 SBUHISCS TYPEIA 10 yr 0 0642 0 28 SBUH/SCS TYPE1A 25 yr 0 0696 0 28 SBUH/SCS TYPEIA 50 yr 0 0750 0 28 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs. 0 20 Intv 10.00 min TC 0.03 hrs 0 04 hrs 0.0744 ac 0 1240 ac 0.0202 ac 0 0574 ac Length• Slope• Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length Slope• Coeff. Travel Time 126 00 ft 1 19% 27.0000 0 71 mm 18 50 ft 2.00% 0.0110 0.40 mm 68.00 ft 0 50% 21.0000 0 76 min 5 00 ft 2.00% 0.0110 0 14 min 20 00 ft 2.00% 0 0110 0 42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0356 0 48 SBUH/SCS TYPE1A 6 mo 0 0613 0 48 SBUH/SCS TYPEIA 2 yr 0 0986 0 48 SBUH/SCS TYPE1A 10 yr 0 1176 0 48 SBUH/SCS TYPE1A 25 yr 0 1272 0 48 SBUH/SCS TYPEIA 50 yr 0 1368 0 48 SBUH/SCS TYPEIA 100 Loss Method• SCS CN Number SCS Abs 0 20 ~' Storm Dur. 24.00 hrs Area CN Pervious 0.0938 ac 78.00 Impervious 0 3890 ac 98 00 Total 0.4828 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip ' Impervious TC Data: Flow type Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K3 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K3 0 09 7 83 BSN K3 0.15 7 83 BSN K3 0 24 7 83 BSN K3 0 29 7 83 BSN K3 0 31 7 83 BSN K3 0 34 7 83 yr Drainage Area: BSN K3 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0 1009 ac 78.00 Impervious 0.3013 ac 98.00 Total 0.4022 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDEWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Intv: 10 00 min TC 0 03 hrs 0.12 hrs 0.0938 ac 0.2966 ac 0 0350 ac 0 0574 ac Length. Slope: Coeff Travel Time 6.00 ft 2 00% 0.2400 1.90 mm Length: Slope Coeff: Travel Time 315.00 ft 0.56% 27 0000 2.60 min 18.50 ft 2.00% 0.0110 0.40 min 340 00 ft 0 50% 21 0000 3.82 mm 5.00 ft 2.00% 0.0110 0 14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0279 0 40 SBUH/SCS TYPE1A 6 mo 0 0486 0 40 SBUH/SCS TYPEIA 2 yr 0 0790 0 40 SBUH/SCS TYPE1A 10 yr 0 0946 0 40 SBUH/SCS TYPEIA 25 yr 0 1025 0 40 SBUH/SCS TYPEIA 50 yr 0 1104 0 40 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs 0.20 Intv 10.00 min TC 0 03 hrs 0.04 hrs 0 1009 ac 0.2143 ac 0 0296 ac 0.0574 ac Length Slope Coeff: Travel Time 6.00 ft 2 00% 0.2400 1.90 min Length: Slope: Coeff: Travel Time 265.00 ft 1 58% 27 0000 1.30 min 18 50 ft 2 00% 0.0110 0.40 min Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K4 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K4 0 05 7 83 BSN K4 0 09 7 83 BSN K4 0.15 7 83 BSN K4 0 17 7 83 BSN K4 0 19 7 83 BSN K4 0 20 7 83 yr Drainage Area: BSN K4 Hyd Method SBUH Hyd Peak Factor. 484 00 Storm Dur. 24.00 hrs Area CN Pervious 0.0282 ac 78 00 Impervious 0.1926 ac 98 00 Total 0.2208 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description: Sheet Across Planter Stnp Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K5 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K5 0 15 8 00 BSN K5 0 25 8 00 BSN K5 0 39 8 00 BSN K5 0 46 8 00 BSN K5 0.49 8 00 BSN K5 0 53 8 00 yr Drainage Area: BSN K5 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur~ 24.00 hrs Area CN 60 00 ft 0 50% 21.0000 0 67 min 5.00 ft 2.00% 0.0110 0.14 min Peak Vol Area (ac-ft) ac 0 0174 0 22 0 0296 0 22 0 0471 0 22 0 0560 0 22 0 0604 0 22 0 0649 0 22 Method Ramtype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs~ 0.20 Intv: 10.00 min TC 0 03 hrs 0.04 hrs 0.0282 ac 0 1493 ac 0.0204 ac 0 0229 ac Length Slope. Coeff Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length Slope: Coeff. Travel Time 175 00 ft 0 73% 27.0000 1.26 min 18.50 ft 2.00% 0 0110 0.40 min 50 00 ft 0.50% 21.0000 0 56 mm 5.00 ft 2.00% 0 0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0497 0 62 SBUH/SCS TYPEIA 6 mo 0 0844 0 62 SBUH/SCS TYPEIA 2 yr 0 1339 0 62 SBUH/SCS TYPEIA 10 yr 0 1590 0 62 SBUH/SCS TYPEIA 25 yr 0.1716 0 62 SBUH/SCS TYPEIA 50 yr 0 1843 0 62 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs: 0 20 Intv: 10 00 min TC Pervious 0 0721 ac 78 00 Impervious 0.5512 ac 98 00 Total 0.6233 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Stnp Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks 0 03 hrs 0 11 hrs 0.0721 ac 0.3257 ac 0.1452 ac 0.0803 ac Length. Slope: Coeff: Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length Slope: Coeff: Travel Time 268.00 ft 0.50% 27 0000 3.11 min 27.00 ft 2.00% 0 0110 0 54 min 255 00 ft 0.50% 21 0000 2 86 min 12.00 ft 2.00% 0.0110 0 28 min ADDHYD [BSN K1] AS [6 mo] [BSN K2] AS [6 mo] TO [BSN K1 +BSN K2] Peak Flow: 0.1560 cfs Peak Time. 8.00 hrs Hyd Vol: 2369.71 cf - 0.0544 acft ADDHYD [BSN K1] AS [2 yr] [BSN K2] AS [2 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 2683 cfs Peak Time: 8.00 hrs Hyd Vol• 4099.86 cf - 0 0941 acft ADDHYD [BSN K1] AS [10 yr] [BSN K2] AS [10 yr] TO [BSN K1 +BSN K2] Peak Fiow. 0.4331 cfs Peak Time: 8 00 hrs Hyd Vol 6624 56 cf - 0.1521 acft ADDHYD [BSN K1] AS [25 yr] [BSN K2] AS [25 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 5173 cfs Peak Time: 8.00 hrs Hyd Vol. 7918 22 cf - 0.1818 acft ADDHYD [BSN K1] AS [50 yr] [BSN K2] AS [50 yr] TO (BSN K1 +BSN K2] Peak Flow: 0.5598 cfs Peak Time: 8 00 hrs Hyd Vol: 8570.03 cf - 0.1967 acft ADDHYD [BSN K1] AS [100 yr] [BSN K2] AS [100 yr] TO [BSN K1 +BSN K2] Peak Flow 0.6024 cfs Peak Time 8 00 hrs Hyd Vol. 9224.90 cf - 0 2118 acft ADDHYD [BSN K3] AS [6 mo] [BSN K4] AS [6 mo] TO [BSN K3 +BSN K4] Peak Flow 0.1397 cfs Peak Time 7 83 hrs Hyd Vol- 1976 00 cf - 0 0454 acft ADDHYD [BSN K3] AS [2 yr] [BSN K4] AS [2 yr] TO [BSN K3 +BSN K4] Peak Flow. 0.2381 cfs Peak Time 7 83 hrs Hyd Vol 3408 91 cf - 0.0783 acft ADDHYD [BSN K3] AS [10 yr] [BSN K4] AS [10 yr] TO [BSN K3 +BSN K4] Peak Flow 0.3848 cfs Peak Time: 7 83 hrs Hyd Vol: 5493 47 cf - 0.1261 acft ADDHYD [BSN K3] AS [25 yr] [BSN K4] AS [25 yr] TO [BSN K3 +BSN K4] Peak Flow. 0.4598 cfs Peak Time. 7 83 hrs Hyd Vol 6560 11 cf - 0 1506 acft ADDHYD [BSN K3] AS [50 yr] [BSN K4] AS [50 yr] TO [BSN K3 +BSN K4] Peak Flow 0 4977 cfs Peak Time. 7.83 hrs Hyd Vol: 7097 15 cf - 0.1629 acft ADDHYD [BSN K3] AS [100 yr] [BSN K4] AS [100 yr] TO [BSN K3 +BSN K4] Peak Flow 0.5356 cfs Peak Time: 7 83 hrs Hyd Vol: 7636.58 cf - 0 1753 acft MOVEHYD (BSN K5] TO (BSN K5 - 6 mo] AS (6 mo] Peak Flow: 0 1461 cfs Peak Time: 8 00 hrs Hyd Vol. 2166.67 cf - 0.0497 acft MOVEHYD [BSN K5] TO [BSN K5 - 2 yr] AS (2 yr] Peak Flow. 0.2459 cfs Peak Time 8.00 hrs Hyd Vol 3676 63 cf - 0.0844 acft MOVEHYD [BSN K5] TO [BSN K5 - 10 yr] AS [10 yr] Peak Flow: 0.3872 cfs Peak Time: 8.00 hrs Hyd Vol. 5834 09 cf - 0 1339 acft MOVEHYD [BSN K5] TO [BSN K5 - 25 yr] AS [25 yr] Peak Flow: 0.4583 cfs Peak Time: 8 00 hrs Hyd Vol 6927.65 cf - 0.1590 acft MOVEHYD [BSN K5] TO [BSN K5 - 50 yr] AS [50 yr] Peak Flow• 0 4940 cfs Peak Time: 8.00 hrs Hyd Vol: 7476.65 cf - 0 1716 acft MOVEHYD [BSN K5] TO [BSN K5 - 100 yr] AS [100 yr] Peak Flow: 0 5297 cfs Peak Time 8.00 hrs Hyd Vol 8027.03 cf - 0.1843 acft ADDHYD [BASIN K1-4] AS [6 mo] [BSN K5] AS [6 mo] TO [BASIN K1-4 +BSN K5] Peak Flow• 0 4418 cfs Peak Time: 7.83 hrs Hyd Vol: 6512 38 cf - 0 1495 acft ADDHYD [BASIN K1-4] AS [2 yr] [BSN K5] AS [2 yr] TO [BASIN K1-4 +BSN K5] Peak Flow• 0.7523 cfs Peak Time: 7.83 hrs Hyd Vol 11185 4 cf - 0 2568 acft ADDHYD [BASIN K1-4] AS [10 yr] (BSN K5] AS [10 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1 2051 cfs Peak Time. 7.83 hrs Hyd Vol: 17952.12 cf - 0.4121 acft ADDHYD [BASIN K1-4] AS [25 yr] [BSN K5] AS [25 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1 4354 cfs Peak Time: 7.83 hrs Hyd Vol 21405 98 cf - 0 4914 acft ADDHYD [BASIN K1-4] AS [50 yr] [BSN K5] AS [50 yr] TO [BASIN K1-4 +BSN K5] Peak Flow• 1.5515 cfs Peak Time 7 83 hrs Hyd Vol. 23143.83 cf - 0.5312 acft ADDHYD [BASIN K1-4] AS [100 yr] [BSN K5] AS [100 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1.6391 cfs Peak Time 7.83 hrs Hyd Vol. 24888.51 cf - 0 5714 acft Hydrograph ID: BASIN K Area. 2 0051 ac Hyd Int: 10 00 min Base Flow: Peak Flow. 1 6391 cfs Peak Time• 7.83 hrs Hyd Vol. 0.5714 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0.67 0.0055 8.67 0 6812 16 50 0 2301 0 83 0 0210 8 83 0 5902 16 67 0 2303 1 00 0 0388 9 00 0 5963 i 6 83 0 2303 1 17 0 0592 9 17 0 5098 17 00 - 0 2304 1 33 0 0786 9 33 0 4441 17 17 0 2220 1 50 0 0917 9 50 0 4499 17 33 0 2150 1.67 0 1071 9 67 0 4211 17 50 0 2158 1.83 0 1206 9 83 0 4025 17 67 0 2153 2 00 0 1291 10 00 0 4043 17 83 0 2155 2 17 0 1416 10 17 0 3787 18 00 0 2155 2 33 0 1526 10 33 0 3589 18 17 0 2070 2 50 0 1584 10 50 0 3609 18 33 0 2000 2 67 0 1637 10 67 0 3432 18 50 0 2008 2 83 0 1681 10 83 0 3302 18 67 0 2003 3 00 0 1719 11 00 0 3316 18 83 0 2005 3 17 0 1752 11 17 0 3226 19 00 0 2005 3 33 0 1781 11 33 0 3162 19 17 0 1920 3 50 0 1807 11 50 0 3170 19 33 0 1850 3 67 0 1891 11 67 0 3084 19 50 0 1857 3 83 0 1966 11 83 0 3019 19 67 0 1852 4 00 0 1984 12 00 0 3027 19 83 0.1854 4 17 0 2131 12 17 0 2940 20 00 0 1854 4.33 0 2260 12.33 0 2875 20 17 0 1855 4 50 0 2274 12 50 0 2882 20 33 0 1855 4 67 0 2425 12 67 0 2795 20 50 0 1855 4 83 0.2559 12 83 0 2729 20 67 0.1856 5 00 0 2582 13 00 0 2736 20 83 0 1856 5 17 0 2748 13 17 0 2733 21 00 0 1857 5 33 0 2890 13 33 0 2736 21 17 0 1857 5 50 0.2912 13 50 0 2737 21 33 0 1858 5 67 0 3082 13 67 0 2655 21 50 0 1858 5 83 0 3226 13 83 0 2586 21 67 0 1859 6 00 0 3246 14 00 0 2594 21 83 0 1859 6 17 0 3560 14 17 0 2590 22 00 0 1860 6 33 0 3831 14 33 0 2593 22 17 0.1774 6 50 0 3847 14 50 0 2594 22 33 0 1703 6 67 0 4324 14 67 0 2511 22 50 0 1710 6 83 0 4728 14 83 0 2442 22 67 0 1705 7 00 0 4741 15 00 0 2450 22 83 0 1707 7 17 0 5318 15 17 0 2445 23 00 0 1707 7 33 0 5796 15 33 0 2448 23 17 0 1707 7 50 0 5808 15 50 0 2449 23 33 0 1707 7 67 1 1475 15 67 0 2365 23 50 0 1708 7 83 1 6391 15 83 0 2296 23 67 0 1708 8 00 1 6272 16 00 0 2303 23 83 0 1709 8 17 1 1967 16 17 0 2299 24 00 0.1709 8 33 0 7919 16 33 0 2301 24 17 0 0756 8 50 0 8304 16 50 0 2301 24 33 0 0075 Hydrograph ID: BASIN K Area. 2.0051 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 1.6391 cfs Peak Time 7.83 hrs Hyd Vol• 0.5714 acft MOVEHYD [BASIN K] TO [BASIN K - 6 mo] AS [6 mo] Peak Flow: 0.4418 cfs Peak Time. 7 83 hrs Hyd Vol 6512 38 cf - 0.1495 acft MOVEHYD [BASIN K] TO [BASIN K - 100 yr] AS [100 yr] Peak Flow. 1.6391 cfs Peak Time: 7 83 hrs Hyd Vol• 24888.51 cf - 0.5714 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp. Multiple Orifice Start EI Max EI Increment 325.0000 ft 330.8000 ft 0.10 Infil: 10 00 inlhr Multiplier: 1.00 'd Reach ID: BIOSWALE K Section Properties: Shape. Ditch Routing Method. Travel Time Translation Size Material Mannings n Hyd params By Corr Metal -normal 0 0250 Mannings Formula Length Slope Entrance Loss 250.0000 ft 0 50 Width Bank Hgt ss1 ss2 10.0000 ft 3.0000 ft 3 OOh.1 v 3.OOh~1 v Up Node Dn Node Up Invert Dn Invert DUMMY K 0.0000 ft 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Min Slope Max Slope Mm drop 0 50000 ft 1.0000 ft 3 0000 ft 0 5000 ft 2 0000 ft 0 0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 0000 ac 0 0000 cf 0.0000 cf 0 0000 ft/s 0 0000 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0 0000 ft ROUTEHYD [BASIN K - 6 MO] THRU [BIOSWALE K] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE K 2 0051 0 4418 ---- 1 00 0 1948 Ditch 0 6737 ----- BASIN K ROUTEHYD [BASIN K - 100 YR] THRU [BIOSWALE K] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE K 2 0051 1 6391 ---- 1 00 0 3423 Ditch 0 9930 ----- BASIN K Node ID: INFILTRATION K Desc~ Manhole structure Start EI: 330 8000 ft Max EI: 331.8000 ft Contrib Basin Contrib Hyd. Length Width Void Ratio 250.0000 ft 10.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN K RLP Desc. Manhole structure Start EI: 330.8000 ft Contrib Basin BASIN K Storage Id INFILTRATION K Max EI 331.8000 ft Contrib Hyd Discharge Id: INFILTRATION RLPCOMPUTE [BASIN K RLP] SUMMARY 100 YR MatchO=PeakQ= 1.6391 cfs Peak Out Q: 1.0818 cfs -Peak Stg: 331 61 ft -Active Vol• 2342.43 cf ' WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -K Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin K Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 DEVELOPED LAND USE Basin Basin K Flows To Bio-Infiltration Swale K Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale K Pond Type: Trapezoidal Pond Pond Flows to Polnt of Compliance Pond Rain / Evap is not activated. Tlimcnainnc Depth: aft. Bottom Length: 250ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.033 acre-ft. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 330.3 0.057 0.000 0.000 0.000 330.4 0.060 0.005 0.000 0.579 330.5 0.063 0.009 0.000 0.579 330.5 0.066 0.019 0.000 0.579 330.6 0.069 0.020 0.000 0.579 4°~` .) r ~u ~~~, ~OgEPH Dq~r ~1 of waste ~~e ~~~ ~// nisi Ew S,~c' ,~ ~~IALx~-~4 ,,~®,~ 09-ZZ-~ 330.7 0.071 0.025 0.000 0.579 330.8 0.074 0.031 0.000 0.579 330.8 0.077 0.037 0.911 0.579 330.9 0.080 0.043 1.873 0.579 331.0 0.083 0.049 3.920 0.579 331.1 0.086 0.056 6.416 0.579 331.2 0.089 0.062 9.292 0.579 331.2 0.092 0.069 12.50 0.579 331.3 0.094 0.077 16.01 0.579 331.4 0.097 0.084 19.81 0.579 331.5 0.100 0.092 23.86 0.579 331.5 0.103 0.100 28.15 0.579 331.6 0.106 0.108 32.67 0.579 331.7 0.109 0.116 37.42 0.579 331.8 0.112 0.125 42.37 0.579 331.9 0.115 0.134 47.53 0.579 331.9 0.118 0.143 52.88 0.579 332.0 0.121 0.152 58.41 0.579 332.1 0.124 0.162 64.13 0.579 332.2 0.127 0.171 70.02 0.579 332.2 0.130 0.181 76.08 0.579 332.3 0.133 0.192 82.31 0.579 332.4 0.136 0.202 88.70 0.579 332.5 0.139 0.213 95.24 0.579 332.6 0.142 0.224 101.9 0.579 332.6 0.195 0.235 108.8 0.579 332.7 0.149 0.246 115.8 0.579 332.8 0.152 0.258 122.9 0.579 332.9 0.155 0.270 130.2 0.579 332.9 0.158 0.282 137.6 0.579 333.0 0.161 0.294 145.2 0.579 333.1 0.164 0.307 152.9 0.579 333.2 0.167 0.320 160.7 0.579 333.3 0.170 0.333 168.6 0.579 333.3 0.179 0.397 176.7 0.579 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Flow(cfs) Predeveloped 0.534322 0.650385 0.722346 0.809223 0.871623 0.932428 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.534322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932428 Flow Frequency Return Periods for Developed Ma.ta.gated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.049867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1'956 0.503 0.000 1957 0.815 0.178 1958 0.468 0.000 1959 0.547 0.000 1960 0.602 0.000 1961 0.900 0.000 1962 0.932 0.000 1963 0.866 0.079 1964 0.630 0.000 1965 0.590 0.000 1966 0.416 0.000 1967 0.507 0.000 1968 0.399 0.000 1969 0.394 0.000 1970 0.393 0.000 1971 0.489 0.000 1972 0.580 0.000 1973 0.463 0.000 1979 0.539 0.000 1975 0.467 0.000 1976 0.537 0.000 1977 0.680 0.000 1978 0.578 0.000 1979 0.688 0.000 1980 0.516 0.000 1981 0.590 0.000 1982 0.682 0.000 1983 0.730 0.053 1984 0.445 0.000 1985 0.515 0.000 1986 0.573 0.000 1987 0.613 0.000 1988 0.391 0.000 1989 0.409 0.000 1990 0.804 0.118 1991 0.810 0.077 1992 0.502 0.000 1993 0.368 0.000 1994 0.409 0.000 1995 0.592 0.000 1996 0.601 0.000 1997 0.489 0.000 1998 0.678 0.000 1999 0.582 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8198 0.1180 2 0.8098 0.0790 3 0.8041 0.0766 4 0.7302 0.0525 5 0.6879 0.0000 6 0.6821 0.0000 7 0.6802 0.0000 8 0.6779 0.0000 9 0.6298 0.0000 10 0.6127 0.0000 11 0.6022 0.0000 12 0.6006 0.0000 13 0.5917 0.0000 14 0.5905 0.0000 15 0.5899 0.0000 16 0.5823 0.0000 17 0.5803 0.0000 18 0.5779 0.0000 19 0.5728 0.0000 20 0.5471 0.0000 0.5388 0.0000 0.5373 0.0000 0.5159 0.0000 0.5153 0.0000 0.5068 0.0000 0.5033 0.0000 0.5018 0.0000 0.4887 0.0000 0.4839 0.0000 0.4682 0.0000 0.9668 0.0000 0.4627 0.0000 0.4453 0.0000 0.4321 0.0000 0.4161 0.0000 0.4086 0.0000 0.4085 0.0000 0.4003 0.0000 0.3986 0.0000 0.3940 0.0000 0.3935 0.0000 0.3677 0.0000 0.3415 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2672 1046 0 .0 Pass 0.2733 976 0 .0 Pass 0.2794 911 0 .0 Pass 0.2855 843 0 .0 Pass 0.2916 788 0 .0 Pass 0.2977 720 0 .0 Pass 0.3038 671 0 .0 Pass 0.3099 629 0 .0 Pass 0.3160 582 0 .0 Pass 0.3221 536 0 .0 Pass 0.3282 498 0 .0 Pass 0.3343 460 0 .0 Pass 0.3404 434 0 .0 Pass 0.3465 399 0 .0 Pass 0.3526 364 0 .0 Pass 0.3587 341 0 .0 Pass 0.3649 315 0 .0 Pass 0.3710 297 0 .0 Pass 0.3771 278 0 .0 Pass 0.3832 254 0 .0 Pass 0.3893 240 0 .0 Pass 0.3954 223 0 .0 Pass 0.4015 202 0 .0 Pass 0.4076 190 0 .0 Pass 0.9137 179 0 .0 Pass 0.4198 168 0 .0 Pass 0.4259 161 0 .0 Pass 0.4320 155 0 .0 Pass 0.4381 147 0 .0 Pass 0.4442 142 0 .0 Pass 0.9503 138 0 .0 Pass 0.4564 136 0 .0 Pass 0.4625 124 0 .0 Pass 0.4686 117 0 .0 Pass 0.4748 109 0 .0 Pass 0.4809 104 0 .0 Pass 0.4870 98 0 .0 Pass 0.4931 90 0 .0 Pass 0.4992 87 0 .0 Pass 0.5053 82 0 .0 Pass 0.5114 74 0 .0 Pass 0.5175 67 0 .0 Pass 0.5236 66 0 .0 Pass 0.5297 61 0 .0 Pass 0.5358 59 0 .0 Pass 0.5419 55 0 .0 Pass 0.5480 50 0 .0 Pass 0.5541 46 0 .0 Pass 0.5602 46 0 .0 Pass 0.5663 41 0 .0 Pass 0.5724 38 0 .0 Pass 0.5786 36 0 .0 Pass 0.5847 34 0 .0 Pass 0.5908 29 0 .0 Pass 0.5969 26 0 .0 Pass 0.6030 24 0 .0 Pass 0.6091 23 0 .0 Pass 0.6152 19 0 .0 Pass 0.6213 19 0 .0 Pass 0.6274 18 0 .0 Pass 0.6335 16 0 .0 Pass 0.6396 16 0 .0 Pass 0.6457 16 0 .0 Pass 0.6518 15 0 .0 Pass 0.6579 14 0 .0 Pass 0.6640 12 0 .0 Pass 0.6701 12 0 .0 Pass 0.6762 12 0 .0 Pass 0.6823 10 0 .0 Pass 0.6885 8 0 .0 Pass 0.6946 8 0 .0 Pass 0.7007 8 0 .0 Pass 0.7068 8 0 .0 Pass 0.7129 7 0 .0 Pass 0.7190 6 0 .0 Pass 0.7251 6 0 .0 Pass 0.7312 5 0 .0 Pass 0.7373 5 0 .0 Pass 0.7934 5 0 .0 Pass 0.7495 5 0 .0 Pass 0.7556 5 0 .0 Pass 0.7617 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7739 5 0 .0 Pass 0.7800 5 0 .0 Pass 0.7861 5 0 .0 Pass 0.7922 5 0 .0 Pass 0.7984 5 0 .0 Pass 0.8045 5 0 .0 Pass 0.8106 3 0 .0 Pass 0.8167 1 0 .0 Pass 0.8228 1 0 .0 Pass 0.8289 1 0 .0 Pass 0.8350 1 0 .0 Pass 0.8411 1 0 .0 Pass 0.8472 1 0 .0 Pass 0.8533 1 0 .0 Pass 0.8594 1 0 .0 Pass 0.8655 1 0 .0 Pass 0.8716 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.17 cfs. Adjusted £or 15 min: 0.2 cfs. Off-line facility target flow: 0.12 cfs. Adjusted for 15 m~.n: 0.19 c£s. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 11EAR~ FLOW (cis) 100 9324 ~-- - ----- ' z ~ , ~~' 10.0 kkkkkk:~kkY'Xk}??:~?^~+~4,100Rkk}skkkK}~ F1~, ~ S0 x_8716 a 25 ~ 8092 1'0 ~ ~ 10 .7223 1 L ~,oo~,oooo 5 6504 d 4000004 o Ptedeveloped ~ 10E-t x Developed Mitigated 2 5343 ,G v xx ~ x C~ 10E-2 ~ ~ ~ 1 10 20 30 d0 50 60 70 SO 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TE,pR ~LOtU (cfs) 100 ~ 9324 =~----~-~~- 0 87 _ ~ _ _ _ _ ___ _o Pxedeve~pv.~ _ __ __ ~ ___~ _ 50 i 8716 , : , 3 , ~ i x Developed wiC~ Faed'Ry 25 .849? -_~. ~ i9 0 T2 u.. _ R ~.. .._ ._~ _ _ - . _ . u .. . a 10 `.1223 ~ ~ ~ 0 57 __ _ ._ . __. _ _ _____~ _. s '--°-~,, ~ : 5 6504 ~ .___.. _._ _... ______ ..-__ . `~' 042 ~r (E ' Y, i ' ~ F ~ ; 2 .5343 `6 ~ 13 ~ n i~ .$ ~ 3 ' 027 _ ~. _ ._._~__~_ ~_._ __ _ __ L. ~ * / > > 3 ~ V 3 ~ i 3 . yy ~ V i :3~ 3 10E~5 ~ 10E~d 10E•3 10E•2 10E•1 1 10 Percent ~xceedin Yearly Peaks for developed WIO Pond Duration Graph ~R ° rIDW {~) - - 100 ~ 1138 ~~~ Iz 3 3 i ~~}; _ ~ ~3 Y ti3; ~ ~ F~i : ii ~~ 3 ~ ~ 3~~ ~~t t fit 3 ~ ji ' }' F ~ ~ i 255045 _ ,~1; f ~ _ j , r1j ~ i' SII i ' x ~~ i~ ., ~ E ~ 5 =`L518 - 11l' 2 .5459: ._.. _ .__~ - .r.. 'early Peaks for Developed W/Pond CLEARHIS BSN K1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K1 0 06 7 83 BSN K1 0 10 7 83 BSN K1 0 16 7 83 BSN K1 0 19 7 83 BSN K1 0 21 7 83 BSN K1 0 23 7 83 yr Drainage Area: BSN K1 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0744 ac 78.00 Impervious 0.2016 ac 98.00 Total 0 2760 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type. Description Sheet Across Planter Strip Impervious TC Data: Flow type: Descnption• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN K2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K2 0 10 8 00 BSN K2 0 18 8 00 BSN K2 0 28 8 00 BSN K2 0 34 8 00 BSN K2 0 36 8 00 BSN K2 0 39 8 00 yr Drainage Area: BSN K2 Hyd Method: SBUH Hyd Peak Factor 484 00 Peak Vol Area Method Ramtype (ac-ft) ac /Loss 0 0188 0 28 SBUH/SCS TYPEIA 6 mo 0 0328 0 28 SBUH/SCS TYPEIA 2 yr 0 0535 0 28 SBUH/SCS TYPEIA 10 yr 0 0642 0 28 SBUH/SCS TYPEIA 25 yr 0 0696 0 28 SBUH/SCS TYPEIA 50 yr 0 0750 0 28 SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs: 0 20 Intv: 10 00 min TC 0.03 hrs 0.04 hrs 0.0744 ac 0 1240 ac 0 0202 ac 0.0574 ac Length• Slope. Coeff• Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length. Slope• Coeff. Travel Time 126 00 ft 1.19% 27 0000 0 71 min 18 50 ft 2.00% 0 0110 0.40 min 68 00 ft 0.50% 21 0000 0.76 min 5.00 ft 2.00% 0.0110 0 14 min 20.00 ft 2 00% 0.0110 0 42 min Peak Vol Area Method Ramtype (ac-ft) ac /Loss 0 0356 0 48 SBUH/SCS TYPEIA 6 mo 0 0613 0 48 SBUHISCS TYPEIA 2 yr 0 0986 0 48 SBUHISCS TYPE1A 10 yr 0 1176 0 48 SBUH/SCS TYPE1A 25 yr 0 1272 0 48 SBUH/SCS TYPEIA 50 yr 0 1368 0 48 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs: 0 20 Storm Dur: 24 00 hrs Intv• 10.00 min Area CN TC Pervious 0.0938 ac 78.00 0.03 hrs Impervious 0.3890 ac 98.00 0.12 hrs Total 0.4828 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0938 ac Impervious CN Data: ROADWAY 98.00 0.2966 ac SIDWALK 98.00 0 0350 ac DRIVEWAY 98.00 0.0574 ac Pervious TC Data: Flow type Description: Length• Slope: Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type: Description. Length Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 315 00 ft 0 56% 27 0000 2.60 min Sheet Across Roadway 18 50 ft 2 00% 0.0110 0 40 min Channel Through Strom Wat er Pipe 340.00 ft 0 50% 21.0000 3.82 min Sheet Across Sidewalks 5.00 ft 2 00% 0 0110 0.14 mm BSN K3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN K3 0 09 7 83 0 0279 0 40 SBUH/SCS TYPEIA 6 mo BSN K3 0 15 7 83 0 0486 0 40 SBUH/SCS TYPEIA 2 yr BSN K3 0 24 7 83 0 0790 0 40 SBUH/SCS TYPEIA 10 yr BSN K3 0 29 7 83 0 0946 0 40 SBUH/SCS TYPEIA 25 yr BSN K3 0 31 7 83 0 1025 0 40 SBUH/SCS TYPE1A 50 yr BSN K3 0 34 7 83 0 1104 0 40 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN K3 Hyd Method• SBUH Hyd Loss Method. SCS CN Number Peak Factor: 484.00 SCS Abs: 0.20 Storm Dur: 24.00 hrs Intv• 10 00 min Area CN TC Pervious 0 1009 ac 78.00 0.03 hrs Impervious 0.3013 ac 98 00 0.04 hrs Total 0 4022 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.1009 ac Impervious CN Data: ROADWAY 98.00 0 2143 ac SIDEWALK 98 00 0.0296 ac DRIVEWAY 98 00 0.0574 ac Pervious TC Data: Flow type. Description: Length Slope Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type: Description Length: Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 265 00 ft 1 58% 27.0000 1.30 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K4 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K4 0 05 7 83 BSN K4 0 09 7 83 BSN K4 0 15 7 83 BSN K4 0 17 7 83 BSN K4 0 19 7 83 BSN K4 0 20 7.83 yr Drainage Area: BSN K4 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24.00 hrs Area CN Pervious 0.0282 ac 78.00 Impervious 0.1926 ac 98.00 Total 0.2208 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description• Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks BSN K5 Event Summary: BasinlD Peak Q Peak T Event ------ (cfs) (hrs) BSN K5 0 15 8 00 BSN K5 0 25 8 00 BSN K5 0 39 8 00 BSN K5 0 46 8 00 BSN K5 0 49 8.00 BSN K5 0 53 8 00 yr Drainage Area: BSN K5 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN 60 00 ft 0.50% 21.0000 0 67 min 5 00 ft 2.00% 0 0110 0.14 min Peak Vol Area (ac-ft) ac 0 0174 0 22 0 0296 0 22 0 0471 0 22 0 0560 0 22 0 0604 0 22 0 0649 0 22 Method Raintype /Loss SBUH/SCS TYPE1A 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs• 0 20 Intv: 10.00 mm TC 0 03 hrs 0.04 hrs 0.0282 ac 0.1493 ac 0 0204 ac 0.0229 ac Length' Slope Coeff• Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length Slope. Coeff• Travel Time 175 00 ft 0 73% 27.0000 1.26 min 18 50 ft 2 00% 0 0110 0.40 min 50 00 ft 0 50% 21.0000 0.56 mm 5.00 ft 2.00% 0.0110 0.14 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0497 0 62 SBUH/SCS TYPEIA 6 mo 0 0844 0.62 SBUH/SCS TYPE1A 2 yr 0 1339 0 62 SBUH/SCS TYPEIA 10 yr 0 1590 0 62 SBUH/SCS TYPEIA 25 yr 0 1716 0 62 SBUH/SCS TYPEIA 50 yr 0 1843 0 62 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs• 0.20 Intv: 10 00 min TC Pervious 0 0721 ac 78.00 0.03 hrs Impervious 0 5512 ac 98 00 0 11 hrs Total 0.6233 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0721 ac Impervious CN Data: ROADWAY 98.00 0 3257 ac SIDWALK 98.00 0 1452 ac DRIVEWAY 98 00 0 0803 ac Pervious TC Data: Flow type: Description: Length: Slope Coeff. Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0 2400 1 90 min Impervious TC Data: Flow type' Description: Length Slope: Coeff: Travel Time Shallow Along Flow Line of Gutter 268.00 ft 0.50% 27 0000 3 11 min Sheet Across Roadway 27 00 ft 2.00% 0 0110 0 54 min Channel Through Strom Water Pipe 255 00 ft 0 50% 21.0000 2.86 min Sheet Across Sidewalks 12.00 ft 2.00% 0.0110 0.28 min ADDHYD [BSN K1] AS [6 mo] (BSN K2] AS [6 mo] TO [BSN K1 +BSN K2] Peak Flow: 0 1560 cfs Peak Time: 8 00 hrs Hyd Vol: 2369.71 cf - 0 0544 acft ADDHYD [BSN K1] AS [2 yr] [BSN K2] AS [2 yr] TO [BSN K1 +BSN K2] Peak Flow. 0.2683 cfs Peak Time 8 00 hrs Hyd Vol: 4099.86 cf - 0.0941 acft ADDHYD [BSN K1] AS [10 yr] [BSN K2] AS [10 yr] TO [BSN K1 +BSN K2] Peak Flow• 0.4331 cfs Peak Time: 8 00 hrs Hyd Vol. 6624 56 cf - 0.1521 acft ADDHYD [BSN K1] AS [25 yr] [BSN K2] AS [25 yr] TO (BSN K1 +BSN K2] Peak Flow. 0.5173 cfs Peak Time: 8 00 hrs Hyd Vol: 7918.22 cf - 0 1818 acft ADDHYD [BSN K1] AS [50 yr] [BSN K2] AS [50 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 5598 cfs Peak Time: 8.00 hrs Hyd Vol. 8570 03 cf - 0.1967 acft ADDHYD [BSN K1] AS [100 yr] [BSN K2] AS [100 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 6024 cfs Peak Time• 8.00 hrs Hyd Vol• 9224.90 cf - 0.2118 acft ADDHYD [BSN K3] AS [6 mo] [BSN K4] AS [6 mo] TO [BSN K3 +BSN K4] Peak Flow 0.1397 cfs Peak Time 7 83 hrs Hyd Vol• 1976 00 cf - 0 0454 acft ADDHYD [BSN K3) AS [2 yr] [BSN K4] AS [2 yr] TO [BSN K3 +BSN K4] Peak Flow: 0 2381 cfs Peak Time• 7.83 hrs Hyd Vol 3408.91 cf - 0.0783 acft ADDHYD [BSN K3] AS [10 yr] [BSN K4] AS [10 yr] TO [BSN K3 +BSN K4] Peak Flow• 0.3848 cfs Peak Time: 7 83 hrs Hyd Vol: 5493.47 cf - 0.1261 acft ADDHYD [BSN K3] AS [25 yr] [BSN K4) AS [25 yr] TO [BSN K3 +BSN K4] Peak Flow. 0 4598 cfs Peak Time 7 83 hrs Hyd Vol: 6560 11 cf - 0 1506 acft ADDHYD [BSN K3] AS [50 yr] [BSN K4] AS [50 yr] TO [BSN K3 +BSN K4] Peak Flow 0 4977 cfs Peak Time: 7.83 hrs Hyd Vol: 7097.15 cf - 0.1629 acft ADDHYD [BSN K3] AS [100 yr] [BSN K4] AS [100 yr] TO [BSN K3 +BSN K4] Peak Flow 0.5356 cfs Peak Time: 7 83 hrs Hyd Vol: 7636.58 cf - 0 1753 acft MOVEHYD [BSN K5] TO [BSN K5 - 6 mo] AS [6 mo] Peak Flow• 0.1461 cfs Peak Time 8 00 hrs Hyd Vol: 2166.67 cf - 0.0497 acft MOVEHYD [BSN K5] TO [BSN K5 - 2 yr] AS [2 yr] Peak Flow: 0 2459 cfs Peak Time. 8.00 hrs Hyd Vol: 3676.63 cf - 0 0844 acft MOVEHYD [BSN K5] TO [BSN K5 - 10 yr] AS [10 yr] Peak Flow. 0.3872 cfs Peak Time• 8 00 hrs Hyd Vol. 5834.09 cf - 0 1339 acft MOVEHYD [BSN K5] TO [BSN K5 - 25 yr] AS [25 yr] Peak Flow: 0.4583 cfs Peak Time 8.00 hrs Hyd Vol 6927 65 cf - 0.1590 acft MOVEHYD [BSN K5] TO [BSN K5 - 50 yr] AS [50 yr] Peak Flow: 0.4940 cfs Peak Time: 8.00 hrs Hyd Vol: 7476.65 cf - 0 1716 acft MOVEHYD [BSN K5] TO [BSN K5 - 100 yr] AS [100 yr] Peak Flow: 0 5297 cfs Peak Time: 8.00 hrs Hyd Vol. 8027.03 cf - 0.1843 acft ADDHYD [BASIN K1-4] AS [6 mo] [BSN K5] AS [6 mo] TO [BASIN K1-4 +BSN K5] Peak Flow 0.4418 cfs Peak Time• 7.83 hrs Hyd Vol: 6512 38 cf - 0.1495 acft ADDHYD [BASIN K1-4] AS [2 yr] [BSN K5] AS [2 yr] TO [BASIN K1-4 +BSN K5] Peak Flow. 0.7523 cfs Peak Time: 7 83 hrs Hyd Vol 11185.4 cf - 0 2568 acft ADDHYD [BASIN K1-4] AS [10 yr] [BSN K5] AS [10 yr] TO [BASIN K1-4 +BSN K5] Peak Flow 1.2051 cfs Peak Time• 7.83 hrs Hyd Vol• 17952 12 cf - 0.4121 acft ADDHYD [BASIN K1-4] AS [25 yr] [BSN K5] AS [25 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1 4354 cfs Peak Time: 7.83 hrs Hyd Vol• 21405 98 cf - 0.4914 acft ADDHYD [BASIN K1-4] AS [50 yr] [BSN K5] AS [50 yr] TO [BASIN K1-4 +BSN K5] Peak Flow. 1 5515 cfs Peak Time: 7.83 hrs Hyd Vol• 23143 83 cf - 0.5312 acft ADDHYD [BASIN K1-4] AS [100 yr] [BSN K5] AS [100 yr] TO [BASIN K1-4 +BSN K5j Peak Flow• 1.6391 cfs Peak Time• 7 83 hrs Hyd Vol 24888.51 cf - 0 5714 acft Hydrograph ID: BASIN K Area: 2.0051 ac Hyd Int: 10.00 min Base Flow: Peak Flow. 1 6391 cfs Peak Time. 7 83 hrs Hyd Vol: 0 5714 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0055 8 67 0.6812 16 50 0 2301 0 83 0 0210 8 83 0 5902 16 67 0 2303 1 00 0 0388 9 00 0 5963 16 83 0 2303 1 17 0.0592 9 17 0 5098 17 00 0 2304 1 33 0 0786 9 33 0 4441 17 17 0 2220 1 50 0 0917 9 50 0 4499 17 33 0 2150 1 67 0 1071 9 67 0 4211 17 50 0 2158 1 83 0 1206 9 83 0 4025 17 67 0 2153 2 00 0 1291 10 00 0 4043 17 83 0 2155 2 17 0 1416 10 17 0 3787 18 00 0 2155 2 33 0 1526 10 33 0 3589 18 17 0 2070 2 50 0 1584 10 50 0 3609 18 33 0.2000 2 67 0 1637 10 67 0 3432 18 50 0 2008 2 83 0 1681 10 83 0 3302 18 67 0 2003 3 00 0 1719 11 00 0 3316 18 83 0 2005 3 17 0 1752 11 17 0 3226 19 00 0 2005 3 33 0 1781 11.33 0 3162 19 17 0 1920 3.50 0 1807 11 50 0 3170 19 33 0 1850 3 67 0 1891 11 67 0 3084 19 50 0 1857 3 83 0 1966 11 83 0 3019 19 67 0 1852 4 00 0 1984 12 00 0 3027 19 83 0 1854 4 17 0 2131 12 17 0 2940 20 00 0 1854 4 33 0 2260 12 33 0 2875 20 17 0 1855 4 50 0 2274 12 50 0 2882 20 33 0 1855 4 67 0 2425 12 67 0 2795 20 50 0 1855 4 83 0 2559 12 83 0 2729 20 67 0 1856 5 00 0 2582 13 00 0 2736 20 83 0 1856 5 17 0 2748 13 17 0 2733 21 00 0 1857 5.33 0 2890 13 33 0 2736 21 17 0 1857 5 50 0.2912 13 50 0 2737 21 33 0 1858 5 67 0 3082 13 67 0 2655 21 50 0 1858 5 83 0 3226 13 83 0 2586 21 67 0 1859 6 00 0 3246 14 00 0 2594 21 83 0 1859 6 17 0.3560 14 17 0.2590 22 00 0 1860 6 33 0 3831 14 33 0 2593 22 17 0 1774 6 50 0 3847 14 50 0 2594 22 33 0 1703 6 67 0 4324 14 67 0 2511 22 50 0 1710 6 83 0 4728 14 83 0 2442 22 67 0 1705 7 00 0 4741 15 00 0 2450 22 83 0 1707 7 17 0 5318 15 17 0 2445 23 00 0 1707 7 33 0 5796 15 33 0 2448 23 17 0 1707 7 50 0 5808 15 50 0 2449 23 33 0.1707 7 67 1 1475 15 67 0 2365 23 50 0 1708 7 83 1 6391 15 83 0 2296 23 67 0 1708 8.00 1 6272 16 00 0 2303 23 83 0 1709 8 17 1.1967 16 17 0 2299 24 00 0 1709 8 33 0 7919 16 33 0 2301 24 17 0 0756 8 50 0 8304 16.50 0.2301 24 33 0 0075 Hydrograph ID: BASIN K Area 2.0051 ac Hyd Int~ 10 00 min Base Flow. Peak Flow 1 6391 cfs Peak Time 7.83 hrs Hyd Vol 0.5714 acft MOVEHYD [BASIN K] TO [BASIN K - 6 mo] AS [6 mo] Peak Flow: 0.4418 cfs Peak Time. 7 83 hrs Hyd Vol: 6512.38 cf - 0.1495 acft MOVEHYD [BASIN K] TO (BASIN K - 100 yr] AS (100 yr] Peak Flow: 1.6391 cfs Peak Time: 7.83 hrs Hyd Vol 24888 51 cf - 0 5714 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 325 0000 ft 330.8000 ft 0 10 Infil: 10.00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE K Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 250 0000 ft 0.50 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh.1 v Up Node Dn Node Up Invert DUMMY K 0.0000 ft Conduit Cons traints: Min Vel Max Vel Mm Cov 0.50000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exlt Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh.1v Dn Invert 0 0000 ft Min Slope Max Slope Mln drop 0 5000 ft 2 0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN K - 6 MO] THRU [BIOSWALE K] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ftls ---------- BIOSWALE K 2 0051 0 4418 ---- 1 00 0 1948 Ditch 0 6737 ----- BASIN K ROUTEHYD [BASIN K - 100 YR] THRU [BIOSWALE K] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE K 2 0051 1 6391 ---- 1 00 0 3423 Ditch 0 9930 ----- BASIN K Node ID: INFILTRATION K Desc: Manhole structure Start EI• 330.8000 ft Max EI: 331.8000 ft Contnb Basin• Contnb Hyd Length Width Vold Ratio 250.0000 ft 10.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN K RLP Desc: Manhole structure Start EI• 330.8000 ft Max EI 331 8000 ft Contnb Basin: BASIN K Contnb Hyd Storage Id. INFILTRATION K Discharge Id' INFILTRATION RLPCOMPUTE [BASIN K RLP] SUMMARY 100 YR MatchO=PeakO= 1.6391 cfs Peak Out Q. 1.0818 cfs -Peak Stg 331 61 ft -Active Vol: 2342.43 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -K Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin K Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 DEVELOPED LAND USE Basin Basin K Flows To Bio-Infiltration Swale K Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.13 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale K Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, ,..e., ~ , ,,,, Depth: aft. Bottom Length: 250ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Da.ameter: 54 in. 0.033 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 330.3 0.057 0.000 0.000 0.000 330.4 0.060 0.005 0.000 0.579 330.5 0.063 0.009 0.000 0.579 330.5 0.066 0.014 0.000 0.579 330.6 0.069 0.020 0.000 0.579 ~:~ ~~ ~. ~S,%~, ~~ y~gfoPH Dq~'~ ~'" doe wAS~t fl era c~ ~// / jy5_S °~~'~OIVAL ~GC~'4" 09''~'~ _ ~ m'~o-® IXPIRES: i1-~~~ 330.7 0.071 0.025 0.000 0.579 330.8 0.074 0.031 0.000 0.579 3.30.8 0.077 0.037 0.411 0.579 330.9 0.080 0.043 1.873 0.579 331.0 0.083 0.099 3.920 0.579 331.1 0.086 0.056 6.416 0.579 331.2 0.089 0.062 9.292 0.579 331.2 0.092 0.069 12.50 0.579 331.3 0.094 0.077 16.01 0.579 331.4 0.097 0.084 19.81 0.579 331.5 0.100 0.092 23.86 0.579 331.5 0.103 0.100 28.15 0.579 331.6 0.106 0.108 32.67 0.579 331.7 0.109 0.116 37.42 0.579 331.8 0.112 0.125 42.37 0.579 331.9 0.115 0.134 47.53 0.579 331.9 0.118 0.143 52.88 0.579 332.0 0.121 0.152 58.41 0.579 332.1 0.124 0.162 64.13 0.579 332.2 0.127 0.171 70.02 0.579 332.2 0.130 0.181 76.08 0.579 332.3 0.133 0.192 82.31 0.579 332.4 0.136 0.202 88.70 0.579 332.5 0.139 0.213 95.2_4 0.579 332.6 0.142 0.224 101.9 0.579 332.6 0.145 0.235 108.8 0.579 332.7 0.149 0.246 115.8 0.579 332.8 0.152 0.258 1?_2.9 0.579 332.9 0.155 0.270 130.2 0.579 332.9 0.158 0.282 137.6 0.579 333.0 0.161 0.294 145.2 0.579 333.1 0.164 0.307 152.9 0.579 333.2 0.167 0.320 160.7 0.579 333.3 0.170 0.333 168.6 0.579 333.3 0.179 0.347 176.7 0.579 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Flow (cfs) Predeveloped 0.534322 0.650385 0.722346 0.809223 0.871623 0.932428 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.534322 5 year 0.650385 10 year 0.722346 25 year 0.809223 50 year 0.871623 100 year 0.932428 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.049867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 156 0.503 0.000 1957 0.815 0.178 1958 0.468 0.000 1959 0.597 0.000 1960 0.602 0.000 1961 0.400 0.000 1962 0.432 0.000 1963 0.866 0.079 1964 0.630 0.000 1965 0.590 0.000 1966 0.416 0.000 1967 0.507 0.000 1968 0.399 0.000 1969 0.394 0.000 1970 0.393 0.000 1971 0.489 0.000 1972 0.580 0.000 1973 0.463 0.000 1974 0.539 0.000 1975 0.467 0.000 1976 0.537 0.000 1977 0.680 0.000 1978 0.578 0.000 1979 0.688 0.000 1980 0.516 0.000 1981 0.590 0.000 1982 0.682 0.000 1983 0.730 0.053 1989 0.445 0.000 1985 0.515 0.000 1986 0.573 0.000 1987 0.613 0.000 1988 0.341 0.000 1989 0.409 0.000 1990 0.804 0.118 1991 0.810 0.077 1992 0.502 0.000 1993 0.368 0.000 1994 0.409 0.000 1995 0.592 0.000 1996 0.601 0.000 1997 0.489 0.000 1998 0.678 0.000 1999 0.582 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.8148 0.1180 2 0.8098 0.0790 3 0.8041 0.0766 4 0.7302 0.0525 5 0.6879 0.0000 6 0.6821 0.0000 7 0.6802 0.0000 B 0.6779 0.0000 9 0.6298 0.0000 10 0.6127 0.0000 11 0.6022 0.0000 12 0.6006 0.0000 13 0.5917 0.0000 14 0.5905 0.0000 15 0.5899 0.0000 16 0.5823 0.0000 17 0.5803 0.0000 18 0.5779 0.0000 19 0.5728 0.0000 20 0.5471 0.0000 0.5388 0.0000 0.5373 0.0000 0.5159 0.0000 0.5153 0.0000 0.5068 0.0000 0.5033 0.0000 0.5018 0.0000 0.4887 0.0000 0.4839 0.0000 0.4682 0.0000 0.9668 0.0000 0.4627 0.0000 0.4953 0.0000 0.4321 0.0000 0.4161 0.0000 0.9086 0.0000 0.4085 0.0000 0.4003 0.0000 0.3986 0.0000 0.3940 0.0000 0.3935 0.0000 0.3677 0.0000 0.3915 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2672 1046 0 .0 Pass 0.2733 976 0 .0 Pass 0.2794 911 0 .0 Pass 0.2855 843 0 .0 Pass 0.2916 788 0 .0 Pass 0.2977 720 0 .0 Pass 0.3038 671 0 .0 Pass 0.3099 624 0 .0 Pass 0.3160 582 0 .0 Pass 0.3221 536 0 .0 Pass 0.3282 998 0 .0 Pass 0.3343 460 0 .0 Pass 0.3404 434 0 .0 Pass 0.3465 399 0 .0 Pass 0.3526 364 0 .0 Pass 0.3587 341 0 .0 Pass 0.3649 315 0 .0 Pass 0.3710 297 0 .0 Pass 0.3771 278 0 .0 Pass 0.3832 254 0 .0 Pass 0.3893 240 0 .0 Pass 0.3959 223 0 .0 Pass 0.4015 202 0 .0 Pass 0.4076 190 0 .0 Pass 0.4137 174 0 .0 Pass 0.4198 168 0 .0 Pass 0.4259 161 0 .0 Pass 0.4320 155 0 .0 Pass 0.4381 197 0 .0 Pass 0.4492 142 0 .0 Pass 0.9503 138 0 .0 Pass 0.9564 136 0 .0 Pass 0.9625 129 0 .0 Pass 0.4686 117 0 .0 Pass 0.4748 109 0 .0 Pass 0.4809 104 0 .0 Pass 0.4870 98 0 .0 Pass 0.4931 90 0 .0 Pass 0.4992 87 0 .0 Pass 0.5053 82 0 .0 Pass 0.5114 74 0 .0 Pass 0.5175 67 0 .0 Pass 0.5236 66 0 .0 Pass 0.5297 61 0 .0 Pass 0.5358 59 0 .0 Pass 0.5419 55 0 .0 Pass 0.5480 50 0 .0 Pass 0.5541 46 0 .0 Pass 0.5602 46 0 .0 Pass 0.5663 41 0 .0 Pass 0.5724 38 0 .0 Pass 0.5786 36 0 .0 Pass 0.5847 34 0 .0 Pass 0.5908 29 0 .0 Pass 0.5969 26 0 .0 Pass 0.6030 24 0 .0 Pass 0.6091 23 0 .0 Pass 0.6152 19 0 .0 Pass 0.6213 19 0 .0 Pass 0.6274 18 0 .0 Pass 0.6335 16 0 .0 Pass 0.6396 16 0 .0 Pass 0.6457 16 0 .0 Pass 0.6518 15 0 .0 Pass 0.6579 14 0 .0 Pass 0.6640 12 0 .0 Pass 0.6701 12 0 .0 Pass 0.6762 12 0 .0 Pass 0.6823 10 0 .0 Pass 0.6885 8 0 .0 Pass 0.6946 8 0 .0 Pass 0.7007 8 0 .0 Pass 0.7068 8 0 .0 Pass 0.7129 7 0 .0 Pass 0.7190 6 0 .0 Pass 0.7251 6 0 .0 Pass 0.7312 5 0 .0 Pass 0.7373 5 0 .0 Pass 0.7439 5 0 .0 Pass 0.7995 5 0 .0 Pass 0.7556 5 0 .0 Pass 0.7617 5 0 .0 Pass 0.7678 5 0 .0 Pass 0.7739 5 0 .0 Pass 0.7800 5 0 .0 Pass 0.7861 5 0 .0 Pass 0.7922 5 0 .0 Pass 0.7984 5 0 .0 Pass 0.8095 5 0 .0 Pass 0.8106 3 0 .0 Pass 0.8167 1 0 .0 Pass 0.8228 1 0 .0 Pass 0.8289 1 0 .0 Pass 0.8350 1 0 .0 Pass 0.8411 1 0 .0 Pass 0.8472 1 0 .0 Pass 0.8533 1 0 .0 Pass 0.8594 1 0 .0 Pass 0.8655 1 0 .0 Pass 0.8716 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.17 c£s. Adjusted for 15 min: 0.2 cfs. Off-line facility target flow: 0.12 cfs. Adjusted for 15 min: 0.14 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEAR iLOW (Cts) tOta 8324 -- - ~_ _ _ ~ ~ 10.0 kkkkkkkkkYkkwkk:{~t+rK~+`~O~i^C~Oskk?<kkkkk 716 ~ .~...;~._ _ 1 S O ~ .8 ( ry~ • CJ 8492 - 3 3 s f s. ~, ~ 90 7223 ~ -" ~ , ~ 1.0 „_,,, oo*ao ~~,tAO~o 5 6584 ~ ~ ' i Ct ~ ~ aocroao~ ~ o Ptedeveio ed I 1 ~ ~ ~ t0E.1 x Developers Mitigated 2 5343 X X 3 1 3 _~ ~ ~ ~t i f I~r ~ ~ 1QE-2 ' 1 10 20 30 40 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart YEAR fLON! (ets) -- 104 8324 - ; , , , ~ , ; A S7 -- -- - ____ _ e Prndpuel4p?d__ __~ ____ ~ _~_4__ _ _ x Developed w~ Facilely ~,~ 50 " 8716. , : " ! ~3~ ~~ ,,, ?5 .$09? = `~ ., ~ ~ 072 _~ .. _.u.. ... _. ..,.. 10 , .7223 "" ° ~ ~ ; 1 N 0 57 __ _ . _ _ ~d ~ _ ~ .. w 5 6504 ----~ ~ ~~ ~~, ~' 042 _ .. ~_ _ _ ____ _ ~ __ _____ ? .5343 , ~ ~,`, ' ~ ~ 0?7 ~~_ _ _ .. __~_ _ __ ~~ ~ n, ;~ ~ 33 ~ . ; ~ ;~, _ _~;, :;;; _ 10E•5 ~ 10E•4 10E•3 tUE~? 14E•1 1 14 Percent Exceedin Yearly Peaks for developed WIO Pond Duration Graph YEAR' FLOW (~) 1~ ;1138 -~---~ - ~-~-- , , , . : ~ , .9 =~; ~ i~; .~° ,{ ;~I' ' f t { s 7701 °--~ 50 ~ ! i ~ ~~~ {3 ' ;i 1 i Ij{! f;3 -~j# ;; f , ' ~ , .~ j ~~ 3 ( i r ~ I { ~ ~ i ; '~ , i i ' ' ~ ~ 25 5045 ---- < ~ -~ i ' 31i t~~ i ~~'!f Ei j){ ~ '~ i 10 X2.681 ._._ ~~~~v ! ~~ ~r 3a ~ ;.~f.W~,$_i..ia_ i 31 1 j 3 1 i ~ 5 .1518 3 ~ ~ ' . ~ z ~;~;~~ ~° ~~ ~ ~ _ [,~y' ? ~ 5459 3 3 Yearly Peaks for Developed W/Pond CLEARHIS BSN K1 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN K1 0 06 7 83 BSN K1 0.10 7 83 BSN K1 0 16 7 83 BSN K1 0 19 7 83 BSN K1 0 21 7 83 BSN K1 0 23 7 83 yr Drainage Area: BSN K1 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0744 ac 78.00 Impervious 0 2016 ac 98 00 Total 0.2760 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description• Sheet Across Planter Stnp Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN K2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN K2 0 10 8 00 BSN K2 0 18 8 00 BSN K2 0.28 8 00 BSN K2 0 34 8 00 BSN K2 0 36 8 00 BSN K2 0 39 8 00 yr Drainage Area: BSN K2 Hyd Method: SBUH Hyd Peak Factor: 484.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0188 0 28 SBUH/SCS TYPEIA 6 mo 0 0328 0 28 SBUH/SCS TYPE1A 2 yr 0 0535 0 28 SBUH/SCS TYPE1A 10 yr 0 0642 0 28 SBUH/SCS TYPEIA 25 yr 0 0696 0 28 SBUH/SCS TYPE1A 50 yr 0 0750 0 28 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs: 0 20 Inty• 10 00 min TC 0.03 hrs 0 04 hrs 0 0744 ac 0.1240 ac 0.0202 ac 0.0574 ac Length: Slope: Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 mm Length Slope. Coeff• Travel Time 126 00 ft 1.19% 27.0000 0 71 mm 18.50 ft 2 00% 0.0110 0 40 min 68.00 ft 0 50% 21.0000 0.76 min 5 00 ft 2.00% 0.0110 0.14 min 20.00 ft 2 00% 0 0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0356 0 48 SBUH/SCS TYPE1A 6 mo 0 0613 0 48 SBUH/SCS TYPEIA 2 yr 0 0986 0 48 SBUH/SCS TYPE1A 10 yr 0 1176 0 48 SBUHlSCS TYPEIA 25 yr 0.1272 0 48 SBUHlSCS TYPEIA 50 yr 0 1368 0 48 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs 0 20 Storm Dur. 24.00 hrs Intv: 10.00 min Area CN TC Pervious 0 0938 ac 78.00 0 03 hrs Impervious 0.3890 ac 98 00 0.12 hrs Total 0 4828 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0 0938 ac Impervious CN Data: ROADWAY 98 00 0.2966 ac SIDWALK 98.00 0.0350 ac DRIVEWAY 98 00 0.0574 ac Pervious TC Data: Flow type. Description: Length: Slope: Coeff: Travel Time Sheet Across Planter Stnp 6.00 ft 2 00% 0 2400 1 90 mm Impervious TC Data: Flow type. Description: Length Slope. Coeff: Travel Time Shallow Along Flow Line of Gutter 315.00 ft 0.56% 27 0000 2 60 min Sheet Across Roadway 18 50 ft 2.00% 0 0110 0.40 min Channel Through Strom Water Pipe 340 00 ft 0 50% 21 0000 3.82 min Sheet Across Sidewalks 5.00 ft 2.00% 0.0110 0 14 min BSN K3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event (cfs) (hrs) (ac-ft) ac /Loss BSN K3 0 09 7 83 0 0279 0 40 SBUH/SCS TYPE1A 6 mo BSN K3 0 15 7 83 0 0486 0 40 SBUHlSCS TYPEIA 2 yr BSN K3 0 24 7 83 0 0790 0 40 SBUHlSCS TYPEIA 10 yr BSN K3 0 29 7 83 0 0946 0 40 SBUH/SCS TYPEIA 25 yr BSN K3 0 31 7 83 0 1025 0 40 SBUH/SCS TYPEIA 50 yr BSN K3 0 34 7 83 0 1104 0 40 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN K3 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur~ 24 00 hrs Area CN Pervious 0.1009 ac 78.00 Impervious 0.3013 ac 98.00 Total 0 4022 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDEWALK 98.OC DRIVEWAY 98.OC Pervious TC Data: Flow type Description: Sheet Across Planter Stnp Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Loss Method: SCS CN Number SCS Abs. 0.20 Inty 10.00 min TC 0.03 hrs 0 04 hrs 0.1009 ac 0 2143 ac 0.0296 ac 0 0574 ac Length. Slope: Coeff 6.00 ft 2 00% 0 2400 Length: Slope: Coeff 265.00 ft 1.58% 27 0000 18 50 ft 2 00% 0.0110 Travel Time 1 90 m m Travel Time 1.30 min 0.40 min Channel Through Strom Water Pipe 60.00 ft 0 50% 21.0000 0.67 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min BSN K4 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN K4 0 05 7 83 0 0174 0 22 SBUH/SCS TYPE1A 6 mo BSN K4 0 09 7 83 0 0296 0 22 SBUH/SCS TYPEIA 2 yr BSN K4 0 15 7 83 0 0471 0 22 SBUH/SCS TYPE1A 10 yr BSN K4 0 17 7 83 0 0560 0 22 SBUHISCS TYPEIA 25 yr BSN K4 0 19 7 83 0 0604 0 22 SBUH/SCS TYPEIA 50 yr BSN K4 0.20 7 83 0 0649 0 22 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN K4 Hyd Method SBUH Hyd Loss Method SCS CN Number Peak Factor 484 00 SCS Abs. 0.20 Storm Dur: 24 00 hrs Inty 10 00 min Area CN TC Pervious 0 0282 ac 78 00 0.03 hrs Impervious 0.1926 ac 98 00 0 04 hrs Total 0 2208 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0282 ac Impervious CN Data: ROADWAY 98.00 0 1493 ac SIDWALK 98.00 0.0204 ac DRIVEWAY 98 00 0 0229 ac Pervious TC Data: Flow type: Description Length: Slope• Coeff• Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type: Description Length• Slope. Coeff• Travel Time Shallow Along Flow Line of Gutter 175.00 ft 0 73% 27.0000 1.26 min Sheet Across Roadway 18 50 ft 2 00% 0.0110 0 40 min Channel Through Strom Water Pipe 50 00 ft 0.50% 21 0000 0.56 min Sheet Across Sidewalks 5 00 ft 2 00% 0.0110 0.14 min BSN K5 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN K5 0 15 8 00 0 0497 0 62 SBUH/SCS TYPEIA 6 mo BSN K5 0 25 8 00 0 0844 0 62 SBUH/SCS TYPEIA 2 yr BSN K5 0 39 8 00 0 1339 0 62 SBUH/SCS TYPEIA 10 yr BSN K5 0 46 8 00 0 1590 0 62 SBUH/SCS TYPEIA 25 yr BSN K5 0 49 8 00 0 1716 0 62 SBUH/SCS TYPEIA 50 yr BSN K5 0 53 8 00 0 1843 0 62 SBUHISCS TYPE1A 100 yr Drainage Area: BSN K5 Hyd Method: SBUH Hyd Loss Method SCS CN Number Peak Factor 484.00 SCS Abs 0 20 Storm Dur 24 00 hrs Intv 10.00 min Area CN TC Pervious 0 0721 ac 78 00 0 03 hrs Impervious 0.5512 ac 98.00 0.11 hrs Total 0.6233 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0721 ac Impervious CN Data: ROADWAY 98 00 0 3257 ac SIDWALK 98.00 0 1452 ac DRIVEWAY 98 00 0 0803 ac Pervious TC Data: Flow type: Description: Length: Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 mm Impervious TC Data: Flow type: Description: Length• Slope: Coeff: Travel Time Shallow Along Flow Line of Gutter 268.00 ft 0.50% 27 0000 3 11 min Sheet Across Roadway 27 00 ft 2 00% 0.0110 0.54 min Channel Through Strom Water Pipe 255.00 ft 0.50% 21 0000 2.86 min Sheet Across Sidewalks 12.00 ft 2 00% 0 0110 0 28 min ADDHYD [BSN K1] AS [6 mo] [BSN K2] AS [6 mo] TO [BSN K1 +BSN K2] Peak Flow: 0.1560 cfs Peak Time 8 00 hrs Hyd Vol: 2369.71 cf - 0.0544 acft ADDHYD (BSN K1] AS [2 yr] [BSN K2] AS [2 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 2683 cfs Peak Time 8 00 hrs Hyd Vol. 4099 86 cf - 0 0941 acft ADDHYD [BSN K1] AS [10 yr] [BSN K2] AS [10 yr] TO [BSN K1 +BSN K2] Peak Flow• 0.4331 cfs Peak Time: 8.00 hrs Hyd Vol. 6624.56 cf - 0.1521 acft ADDHYD [BSN K1] AS [25 yr] [BSN K2] AS [25 yr] TO [BSN K1 +BSN K2] Peak Flow: 0 5173 cfs Peak Time. 8.00 hrs Hyd Vol 7918 22 cf - 0 1818 acft ADDHYD [BSN K1] AS [50 yr] [BSN K2] AS [50 yr] TO [BSN K1 +BSN K2] Peak Flow• 0.5598 cfs Peak Time: 8 00 hrs Hyd Vol. 8570.03 cf - 0.1967 acft ADDHYD [BSN K1] AS [100 yr] [BSN K2] AS [100 yr] TO [BSN K1 +BSN K2] Peak Flow: 0.6024 cfs Peak Time 8 00 hrs Hyd Vol: 9224.90 cf - 0 2118 acft ADDHYD [BSN K3] AS (6 mo] [BSN K4] AS [6 mo] TO [BSN K3 +BSN K4] Peak Flow: 0 1397 cfs Peak Time. 7 83 hrs Hyd Vol 1976 00 cf - 0 0454 acft ADDHYD [BSN K3] AS [2 yr] [BSN K4] AS [2 yr] TO [BSN K3 +BSN K4] Peak Flow: 0 2381 cfs Peak Time 7.83 hrs Hyd Vol 3408 91 cf - 0 0783 acft ADDHYD [BSN K3] AS [10 yr] [BSN K4] AS [10 yr] TO [BSN K3 +BSN K4] Peak Flow 0 3848 cfs Peak Time: 7.83 hrs Hyd Vol 5493.47 cf - 0.1261 acft ADDHYD [BSN K3] AS [25 yr] [BSN K4] AS [25 yr] TO [BSN K3 +BSN K4] Peak Flow: 0 4598 cfs Peak Time: 7 83 hrs Hyd Vol: 6560.11 cf - 0.1506 acft ADDHYD [BSN K3] AS (50 yr] [BSN K4] AS [50 yr] TO [BSN K3 +BSN K4] Peak Flow: 0 4977 cfs Peak Time: 7 83 hrs Hyd Vol: 7097.15 cf - 0 1629 acft ADDHYD [BSN K3] AS [100 yr) [BSN K4] AS [100 yr] TO [BSN K3 +BSN K4] Peak Flow: 0.5356 cfs Peak Time: 7.83 hrs Hyd Vol• 7636.58 cf - 0.1753 acft MOVEHYD [BSN K5] TO [BSN K5 - 6 mo] AS [6 mo] Peak Flow 0 1461 cfs Peak Time• 8 00 hrs Hyd Vol. 2166 67 cf - 0 0497 acft MOVEHYD [BSN K5] TO [BSN K5 - 2 yr] AS [2 yr] Peak Flow. 0.2459 cfs Peak Time: 8.00 hrs Hyd Vol• 3676 63 cf - 0.0844 acft MOVEHYD [BSN K5] TO [BSN K5 - 10 yr] AS [10 yr] Peak Flow: 0 3872 cfs Peak Time. 8.00 hrs Hyd Vol 5834 09 cf - 0 1339 acft MOVEHYD [BSN K5] TO [BSN K5 - 25 yr] AS [25 yr] Peak Flow: 0.4583 cfs Peak Time. 8.00 hrs Hyd Vol 6927.65 cf - 0 1590 acft MOVEHYD [BSN K5] TO [BSN K5 - 50 yr] AS [50 yr] Peak Flow• 0.4940 cfs Peak Time• 8.00 hrs Hyd Vol: 7476.65 cf - 0 1716 acft MOVEHYD [BSN K5] TO [BSN K5 - 100 yr] AS [100 yr] Peak Flow. 0.5297 cfs Peak Time. 8.00 hrs Hyd Vol. 8027.03 cf - 0.1843 acft ADDHYD [BASIN K1-4] AS [6 mo] [BSN K5] AS [6 mo] TO [BASIN K1-4 +BSN K5] Peak Flow. 0.4418 cfs Peak Time: 7 83 hrs Hyd Vol 6512 38 cf - 0 1495 acft ADDHYD [BASIN K1-4] AS [2 yr] [BSN K5] AS [2 yr] TO [BASIN K1-4 +BSN K5] Peak Flow 0.7523 cfs Peak Time 7.83 hrs Hyd Vol: 11185.4 cf - 0.2568 acft ADDHYD [BASIN K1-4] AS [10 yr] [BSN K5] AS [10 yr] TO [BASIN K1-4 +BSN K5] Peak Flow: 1.2051 cfs Peak Time. 7.83 hrs Hyd Vol. 17952.12 cf - 0.4121 acft ADDHYD [BASIN K1-4] AS [25 yr] [BSN K5] AS [25 yr] TO [BASIN K1-4 +BSN K5] Peak Flow 1.4354 cfs Peak Time 7.83 hrs Hyd Vol: 21405.98 cf - 0.4914 acft ADDHYD [BASIN K1-4] AS [50 yr] [BSN K5] AS [50 yr] TO [BASIN K1-4 +BSN K5] Peak Flow• 1.5515 cfs Peak Time• 7 83 hrs Hyd Vol 23143.83 cf - 0.5312 acft ADDHYD [BASIN K1-4] AS [100 yr] [BSN K5] AS [100 yr] TO [BASIN K1-4 +BSN K5] Peak Flow. 1 6391 cfs Peak Time: 7.83 hrs Hyd Vol: 24888 51 cf - 0.5714 acft Hydrograph ID: BASIN K Area• 2.0051 ac Hyd Int 10 00 min Base Flow: Peak Flow: 1 6391 cfs Peak Time 7 83 hrs Hyd Vol: 0 5714 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0.0055 8 67 0 6812 16 50 0 2301 0 83 0 0210 8 83 0 5902 16 67 0 2303 1 00 0 0388 9 00 0 5963 16 83 0 2303 1 17 0 0592 9 17 0 5098 17 00 0 2304 1 33 0 0786 9 33 0 4441 17 17 0 2220 1 50 0 0917 9 50 0 4499 17 33 0 2150 1.67 0 1071 9 67 0 4211 17 50 0 2158 1 83 0 1206 9 83 0 4025 17 67 0 2153 2 00 0 1291 10 00 0.4043 17 83 0 2155 2 17 0 1416 10 17 0 3787 18 00 0 2155 2 33 0 1526 10 33 0 3589 18 17 0 2070 2 50 0 1584 10 50 0 3609 18 33 0 2000 2 67 0.1637 10 67 0 3432 18 50 0 2008 2 83 0 1681 10 83 0 3302 18 67 0 2003 3 00 0 1719 11 00 0 3316 18 83 0 2005 3 17 0 1752 11 17 0 3226 19 00 0 2005 3 33 0 1781 11 33 0 3162 19 17 0.1920 3 50 0 1807 11 50 0 3170 19 33 0 1850 3 67 0 1891 11 67 0 3084 19 50 0 1857 3 83 0 1966 11 83 0 3019 19 67 0 1852 4 00 0 1984 12.00 0 3027 19 83 0 1854 4 17 0 2131 12 17 0 2940 20 00 0 1854 4 33 0 2260 12 33 0 2875 20 17 0 1855 4 50 0 2274 12 50 0 2882 20 33 0 1855 4 67 0 2425 12 67 0 2795 20 50 0.1855 4 83 0 2559 12 83 0 2729 20 67 0 1856 5 00 0 2582 13 00 0 2736 20 83 0 1856 5 17 0 2748 13.17 0 2733 21 00 0 1857 5 33 0 2890 13 33 0.2736 21 17 0 1857 5 50 0 2912 13 50 0 2737 21 33 0.1858 5 67 0 3082 13.67 0 2655 21 50 0 1858 5 83 0 3226 13 83 0 2586 21 67 0 1859 6 00 0 3246 14 00 0 2594 21.83 0 1859 6.17 0 3560 14 17 0 2590 22 00 0 1860 6 33 0 3831 14.33 0 2593 22 17 0 1774 6 50 0 3847 14 50 0 2594 22 33 0 1703 6 67 0 4324 14 67 0 2511 22 50 0 1710 6 83 0 4728 14 83 0 2442 22 67 0 1705 7 00 0 4741 15.00 0 2450 22 83 0 1707 7 17 0 5318 15 17 0 2445 23 00 0 1707 7 33 0 5796 15 33 0 2448 23 17 0.1707 7 50 0 5808 15 50 0 2449 23 33 0 1707 7 67 1 1475 15 67 0 2365 23 50 0 1708 7 83 1 6391 15 83 0 2296 23 67 0 1708 8 00 1 6272 16 00 0 2303 23 83 0 1709 8 17 1 1967 16 17 0 2299 24 00 0 1709 8 33 0 7919 16 33 0 2301 24 17 0 0756 8 50 0.8304 16 50 0 2301 24 33 0 0075 Hydrograph ID: BASIN K Area: 2.0051 ac Hyd Int: 10 00 min Base Flow: Peak Flow• 1 6391 cfs Peak Time• 7 83 hrs Hyd Vol 0.5714 acft MOVEHYD [BASIN K] TO [BASIN K - 6 mo] AS [6 mo] Peak Flow: 0.4418 cfs Peak Time• 7 83 hrs Hyd Vol. 6512 38 cf - 0.1495 acft MOVEHYD (BASIN K] TO [BASIN K - 100 yr] AS [100 yr] Peak Flow. 1 6391 cfs Peak Time. 7 83 hrs Hyd Vol 24888 51 cf - 0 5714 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 325 0000 ft 330.8000 ft 0 10 Infil: 10.00 in/hr Multiplier. 1 00 Q Reach ID: BIOSWALE K Section Properties: Shape Ditch Size Material Manrnngs n Corr Metal -normal Length Slope Entrance Loss 250 0000 ft 0 50 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY K 0 0000 ft Conduit Cons traints: Mln Vel Max Vel Min Cov 0 50000 ft 1 0000 ft 3 0000 ft In/Exfll Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exlt Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method. Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh.1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0 5000 ft 2 0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN K - 6 MO] THRU [BIOSWALE K] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE K 2 0051 0 4418 ---- 1 00 0 1948 Ditch 0 6737 ----- BASIN K ROUTEHYD [BASIN K - 100 YR] THRU [BIOSWALE K] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE K 2 0051 1 6391 ---- 1 00 0 3423 Ditch 0 9930 ----- BASIN K Node ID: INFILTRATION K Desc. Manhole structure Start EI 330.8000 ft Max EI 331.8000 ft Contrib Basin Contnb Hyd Length Width Void Ratlo 250.0000 ft 10.0000 ft 39.00 Bottom area only with Infiltration Node ID: BASIN K RLP Desc: Manhole structure Start EI. 330.8000 ft Max EI~ 331 8000 ft Contnb Basln. BASIN K Contrib Hyd Storage Id. INFILTRATION K Discharge Id: INFILTRATION RLPCOMPUTE [BASIN K RLP] SUMMARY 100 YR MatchQ=PeakQ= 1 6391 cfs Peak Out Q: 1.0818 cfs -Peak Stg 331.61 ft -Active Vol: 2342 43 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -H Site Address: TaYioma 'Perm, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin H Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: l.ll IMPERVIOUS: 1.3 DEVELOPED LAND USE Basin Basin H Flows To Bio-Infiltration Swa]_e H Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.11 IMPERVIOUS: 1.3 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale H Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n;mo„~,...,~ liepth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 333.4 0.037 0.000 0.000 0.000 333.5 0.039 0.003 0.000 0.370 333.6 0.040 0.006 0.000 0.370 333.6 0.042 0.009 0.000 0.370 333.7 0.049 0.013 0.000 0.370 ~~ r=' ~,; 9 `~~ ~~ ~4NALk~~'~a# ~9~1.~~~fJ' ~~~~}1~ 333.8 0.046 0.016 0.000 0.370 333.9 0.047 0.020 0.000 0.370 333.9 0.049 0.023 0.411 0.370 339.0 0.051 0.027 1.873 0.370 334.1 0.053 0.031 3.920 0.370 334.2 0.055 0.036 6.416 0.370 334.3 0.057 0.040 9.292 0.370 334.3 0.058 0.049 12.50 0.370 334.9 0.060 0.099 16.01 0.370 339.5 0.062 0.054 19.81 0.370 334.6 0.064 0.059 23.86 0.370 334.6 0.066 0.064 28.15 0.370 334.7 0.068 0.069 32_.F,7 0.370 334.8 0.069 0.074 37.4?_ 0.370 334.9 0.071 0.080 42.37 0.370 335.0 0.073 0.085 47.53 0.370 335.0 0.075 0.091 52.88 0.370 335.1 0.077 0.097 58.41 0.370 335.2 0.079 0.103 64.13 0.370 335.3 0.081 0.109 70.02 0.370 335.3 0.083 0.116 76.08 0.370 335.9 0.085 0.122 82.31 0.370 335.5 0.086 0.129 88.70 0.370 335.6 0.088 0.136 95.24 0.370 335.7 0.090 0.142 101.9 0.370 335.7 0.092 0.150 108.8 0.370 335.8 0.094 0.157 115.8 0.370 335.9 0.096 0.164 122.9 0.370 336.0 0.098 0.172 130.2 0.370 336.0 0.100 0.179 137.6 0.370 336.1 0.102 0.187 145.2 0.370 336.2 0.104 0.195 152.9 0.370 336.3 0.106 0.209 160.7 0.370 336.4 0.108 0.212 168.6 0.370 336.4 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.495482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.495482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.309 0.000 1957 0.498 0.078 1958 0.286 0.000 1959 0.334 0.000 1960 0.368 0.000 1961 0.245 0.000 1962 0.264 0.000 1963 0.532 0.040 1969 0.384 0.000 1965 0.361 0.000 1966 0.254 0.000 1967 0.311 0.000 1968 0.243 0.000 1969 0.241 0.000 1970 0.290 0.000 1971 0.298 0.000 1972 0.358 0.000 1973 0.282 0.000 1974 0.329 0.000 1975 0.285 0.000 1976 0.328 0.000 1977 0.415 0.000 1978 0.353 0.000 1979 0.420 0.000 1980 0.315 0.000 1981 0.360 0.000 1982 0.416 0.000 1983 0.446 0.020 1984 0.272 0.000 1985 0.314 0.000 1986 0.350 0.000 1987 0.377 0.000 1988 0.208 0.000 1989 0.249 0.000 1990 0.491 0.031 1991 0.500 0.029 1992 0.306 0.000 1993 0.224 0.000 1994 0.249 0.000 1995 0.361 0.000 1996 0.367 0.000 1997 0.295 0.000 1998 0.414 0.000 1999 0.355 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5001 0.0403 2 0.4979 0.0313 3 0.4913 0.0295 4 0.4457 0.0196 5 0.4199 0.0000 6 0.4163 0.0000 7 0.4152 0.0000 8 0.9138 0.0000 9 0.3844 0.0000 10 0.3772 0.0000 11 0.3675 0.0000 12 0.3666 0.0000 13 0.3613 0.0000 14 0.3611 0.0000 15 0.3604 0.0000 16 0.3583 0.0000 17 0.3554 0.0000 18 0.3527 0.0000 19 0.3504 0.0000 20 0.3339 0.0000 0.3289 0.0000 0.3284 0.0000 0.3149 0.0000 0.3145 0.0000 0.3111 0.0000 0.3090 0.0000 0.3063 0.0000 0.2984 0.0000 0.2953 0.0000 0.2860 0.0000 0.2849 0.0000 0.2824 0.0000 0.2720 0.0000 0.2637 0.0000 0.2540 0.0000 0.2994 0.0000 0.2494 0.0000 0.2951 0.0000 0.2435 0.0000 0.2905 0.0000 0.2901 0.0000 0.2294 0.0000 0.2084 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1633 1047 0 .0 Pass 0.1670 972 0 .0 Pass 0.1708 916 0 .0 Pass 0.1745 843 0 .0 Pass 0.1783 785 0 .0 Pass 0.1820 713 0 .0 Pass 0.1858 673 0 .0 Pass 0.1895 629 0 .0 Pass 0.1932 580 0 .0 Pass 0.1970 542 0 .0 Pass 0.2007 504 0 .0 Pass 0.2095 459 0 .0 Pass 0.2082 429 0 .0 Pass 0.2120 400 0 .0 Pass 0.2157 362 0 .0 Pass 0.2194 339 0 .0 Pass 0.2232 315 0 .0 Pass 0.2269 301 0 .0 Pass 0.2307 278 0 .0 Pass 0.2344 254 0 .0 Pass 0.2382 238 0 .0 Pass 0.2419 224 0 .0 Pass 0.2956 203 0 .0 Pass 0.2499 189 0 .0 Pass 0.2531 172 0 .0 Pass 0.2569 167 0 .0 Pass 0.2606 161 0 .0 Pass 0.2644 154 0 .0 Pass 0.2681 145 0 .0 Pass 0.2718 193 0 .0 Pass 0.2756 138 0 .0 Pass 0.2793 136 0 .0 Pass 0.2831 121 0 .0 Pass 0.2868 117 0 .0 Pass 0.2906 110 0 .0 Pass 0.2943 103 0 .0 Pass 0.2980 96 0 .0 Pass 0.3018 91 0 .0 Pass 0.3055 87 0 .0 Pass 0.3093 82 0 .0 Pass 0.3130 74 0 .0 Pass 0.3168 69 0 .0 Pass 0.3205 66 0 .0 Pass 0.3242 60 0 .0 Pass 0.3280 59 0 .0 Pass 0.3317 54 0 .0 Pass 0.3355 50 0 .0 Pass 0.3392 46 0 .0 Pass 0.3930 46 0 .0 Pass 0.3467 91 0 .0 Pass 0.3504 38 0 .0 Pass 0.3592 36 0 .0 Pass 0.3579 34 0 .0 Pass 0.3617 28 0 .0 Pass 0.3654 26 0 .0 Pass 0.3692 23 0 .0 Pass 0.3729 23 0 .0 Pass 0.3766 20 0 .0 Pass 0.3804 19 0 .0 Pass 0.3841 17 0 .0 Pass 0.3879 16 0 .0 Pass 0.3916 16 0 .0 Pass 0.3954 16 0 .0 Pass 0.3991 15 0 .0 Pass 0.4028 14 0 .0 Pass 0.4066 12 0 .0 Pass 0.4103 12 0 .0 Pass 0.4141 11 0 .0 Pass 0.4178 9 0 .0 Pass 0.4216 8 0 .0 Pass 0.4253 8 0 .0 Pass 0.4291 8 0 .0 Pass 0.4328 8 0 .0 Pass 0.9365 8 0 .0 Pass 0.4403 6 0 .0 Pass 0.9440 6 0 .0 Pass 0.4478 5 0 .0 Pass 0.4515 5 0 .0 Pass 0.4553 5 0 .0 Pass 0.9590 5 0 .0 Pass 0.9627 5 0 .0 Pass 0.4665 5 0 .0 Pass 0.9702 5 0 .0 Pass 0.4740 5 0 .0 Pass 0.4777 5 0 .0 Pass 0.4815 5 0 .0 Pass 0.4852 5 0 .0 Pass 0.4889 5 0 .0 Pass 0.9927 4 0 .0 Pass 0.4969 4 0 .0 Pass 0.5002 2 0 .0 Pass 0.5039 1 0 .0 Pass 0.5077 1 0 .0 Pass 0.5114 1 0 .0 Pass 0.5151 1 0 .0 Pass 0.5189 1 0 .0 Pass 0.5226 1 0 .0 Pass 0.5264 1 0 .0 Pass 0.5301 1 0 .0 Pass 0.5339 0 0 .0 Pass Water Quality SMP Flow and Volume. On-line faeilaty volume: 0.012 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.05 cfs. Adjusted for 15 min: 0.06 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not 11rn~ted Lo rmplied warranLie, of program and accompanyrnq documenLal~on. In no event- Shall AQUA 'I'1•:RRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitat~_on to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~Q~ kkk'r`rkkkk`rYKtG'?C4~+r:333~Dh'+{~MOfvXkM?ckkk U ~"p .... 4~ ~ t~,q~~~~y,.Xx7yfY.xi~m~ga~?OOOOat~q ~ a o Redeveloped v t0E-1 x Develnpec~fdhigated ~ ~ toE2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Freauencv Chart 1rE/1R FLOW Imo? 1Cr0 .4500 :..._...... ~ , ~ ~ o Predeveloped 50 r 4201 ' ; i # . ~ ~ x beveloped w~h facildp 25 3895 =~-~- - ; ' ; ,~'~ 0 35 °~ 1, i t V 1 ti/ O 20 2 2$51 ' ` ` ~ l I ~ ~~ :; ~ 013 -- - _. ~. L ~~~ti~~ o 10E~5 ~ 10E•4 10E•3 1UE•2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YF,AR FLOW {tfs) 100 ~ 11 38 ° i ?i ~~: z ,l j ~ i , 50 7 701 --~-~- ~ ~ , '' j i '~ ;i 25 5 D45 -- ~ ~ ° ; ; , ~~ r~ ;i t I 10 2681 °~.`_° ~ ~ w ~~.. ~ i ~ 3 5 1 518 ` 1 5459 ~- ~ ' ' early Neaks for Developed W/Pond CLEARHIS BSN H1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN H1 0 07 7 83 BSN H1 0 12 7 83 BSN H1 0 20 7 83 BSN H1 0 24 7 83 BSN H1 0 26 7 83 BSN H1 0 27 7 83 yr Drainage Area: BSN H1 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur. 24 00 hrs Area CN Pervious 0 0727 ac 78.00 Impervious 0.2562 ac 98 00 Total 0.3289 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN H2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN H2 0 03 7 83 BSN H2 0 05 7 83 BSN H2 0 08 7 83 BSN H2 0 10 7 83 BSN H2 0 11 7 83 BSN H2 0.12 7 83 yr Drainage Area: BSN H2 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0236 0 33 SBUH/SCS TYPEIA 6 mo 0 0408 0 33 SBUH/SCS TYPEIA 2 yr 0 0660 0 33 SBUH/SCS TYPEIA 10 yr 0 0788 0 33 SBUH/SCS TYPEIA 25 yr 0 0853 0 33 SBUH/SCS TYPE1A 50 yr 0 0918 0 33 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs 0.20 Intv 10 00 min TC 0.03 hrs 0 06 hrs 0.0727 ac 0 1437 ac 0.0212 ac 0.0913 ac Length. Slope Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length. Slope Coeff: Travel Time 186 00 ft 0.54% 27.0000 1.56 min 18 50 ft 2 00% 0 0110 0.40 min 80 00 ft 0 50% 21 0000 0 90 min 5.00 ft 2 00% 0 0110 0.14 min 20 00 ft 2.00% 0 0110 0.42 min Peak Vol Area (ac-ft) ac 0 0100 0 14 0 0174 0 14 0 0283 0 14 0 0339 0 14 0 0367 0 14 0 0396 0 14 Method Raintype /Loss SBUH/SCS TYPE1A 6 mo SBUHlSCS TYPEIA 2 yr SBUH/SCS TYPE1A 10 yr SBUH/SCS TYPE1A 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPEIA 100 Hyd Method SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN ervious Loss Method. SCS CN Number SCS Abs 0 20 Inty: 10.00 min TC 0.0363 ac 78 00 0 03 hrs Impervious 0.1079 ac 98 00 0 06 hrs Total 0.1442 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0.0363 ac Impervious CN Data: ROADWAY 98.00 0.0712 ac DRIVEWAY 98 00 0 0367 ac Pervious TC Data: Flow type: Description: Length. Slope Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description Length• Slope• Coeff. Travel Time Shallow Along Flow Line of Gutter 184 00 ft 0 50% 27 0000 2.13 min Sheet Across Roadway 18.50 ft 2 00% 0.0110 0.40 min Channel Through Strom Wat er Pipe 50 00 ft 0 50% 21 0000 0.56 min Sheet Across Driveway 20 00 ft 2 00% 0 0110 0 42 min BSN H3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H3 0 06 7 83 0 0182 0 23 SBUH/SCS TYPEIA 6 mo BSN H3 0 10 7 83 0 0310 0 23 SBUH/SCS TYPE1A 2 yr BSN H3 0 15 7 83 0 0494 0 23 SBUH/SCS TYPEIA 10 yr BSN H3 0 18 7 83 0 0587 0.23 SBUH/SCS TYPE1A 25 yr BSN H3 0 20 7 83 0 0634 0 23 SBUH/SCS TYPE1A 50 yr BSN H3 0 21 7 83 0 0681 0 23 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN H3 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur• 24.00 hrs Area CN Pervious 0.0324 ac 78 00 Impervious 0 2009 ac 98.00 Total 0.2333 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method SCS CN Number SCS Abs: 0 20 Intv: 10 00 min TC 0.03 hrs 0 04 hrs 0.0324 ac 0.0862 ac 0.1147 ac Length: Slope. Coeff• Travel Time 6 00 ft 2 00% 0.2400 1 90 min Length: Slope: Coeff. Travel Time 125 00 ft 1.02% 27.0000 0.76 min 1600 ft 200% 00110 035 min 80 00 ft 0 50% 21 0000 0 90 min 500 ft 200% 00110 0.14 min ADDHYD [BSN H1] AS [6 mo] [BSN H2] AS [6 mo] TO [BSN H1 +BSN H2] Peak Flow 0 1006 cfs Peak Time. 7 83 hrs Hyd Vol 1463.86 cf - 0 0336 acft ADDHYD [BSN H1] AS [2 yr] [BSN H2] AS (2 yr] TO [BSN H1 +BSN H2] Peak Flow. 0.1723 cfs Peak Time: 7.83 hrs Hyd Vol 2537.14 cf - 0 0582 acft ADDHYD [BSN H1] AS [10 yr] [BSN HZ] AS [10 yr] TO [BSN H1 +BSN H2] Peak Flow 0.2807 cfs Peak Time: 7 83 hrs Flyd Vol. 4106 23 cf - 0.0943 acft ADDHYD [BSN H1] AS [25 yr] [BSN H2] AS [25 yr] TO [BSN H1 +BSN H2] Peak Flow. 0 3363 cfs Peak Time• 7 83 hrs Hyd Vol: 4910 93 cf - 0.1127 acft ADDHYD [BSN H1] AS [50 yr] [BSN H2] AS [50 yr] TO [BSN H1 +BSN H2] Peak Flow. 0.3644 cfs Peak Time: 7 83 hrs Hyd Vol: 5316.54 cf - 0.1221 acft ADDHYD [BSN H1] AS [100 yr] [BSN H2] AS [100 yr] TO [BSN H1 +BSN H2] Peak Flow: 0.3927 cfs Peak Time: 7.83 hrs Hyd Vol: 5724.05 cf - 0.1314 acft ADDHYD [BSN H1 +BSN H2] AS [6 mo] [BSN H3] AS [6 mo] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow: 0 1606 cfs Peak Time 7.83 hrs Hyd Vol• 2256 41 cf - 0 0518 acft ADDHYD [BSN H1 +BSN H2] AS [2 yr] [BSN H3] AS (2 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow. 0 2723 cfs Peak Time. 7 83 hrs Hyd Vol: 3885 55 cf - 0 0892 acft ADDHYD [BSN H1 +BSN H2] AS [10 yr] [BSN H3] AS [10 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow 0.4307 cfs Peak Time 7.83 hrs Hyd Vol• 6259 57 cf - 0.1437 acft ADDHYD [BSN H1 +BSN H2] AS [25 yr] [BSN H3] AS [25 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow: 0.5163 cfs Peak Time• 7.83 hrs Hyd Vol: 7466.18 cf - 0.1714 acft ADDHYD [BSN H1 +BSN H2] AS [50 yr] [BSN H3] AS [50 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow 0.5644 cfs Peak Time: 7 83 hrs Hyd Vol. 8080 38 cf - 0 1855 acft ADDHYD [BSN H1 +BSN H2] AS [100 yr] [BSN H3] AS [100 yr] TO [BSN H1 +BSN H2 + BSN H3] Peak Flow: 0 6031 cfs Peak Time: 7.83 hrs Hyd Vol. 8692 48 cf - 0.1996 acft Hydrograph ID: BASIN H Area: 0 7064 ac Hyd Int: 10 00 min Base Flow Peak Flow- 0.6031 cfs Peak Time: 7.83 hrs Hyd Vol• 0 1996 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0023 8 67 0 2299 16 33 0 0807 0 83 0 0083 8 83 0 2001 16 50 0 0807 1 00 0 0146 9 00 0 2085 16 67 0 0808 1 17 0.0219 9 17 0 1734 16 83 0 0808 1 33 0 0285 9 33 0 1510 17 00 0 0808 1 50 0 0326 9 50 0 1575 17 17 0 0774 1 67 0 0381 9 67 0 1457 17 33 0 0750 1 83 0 0426 9 83 0 1396 17 50 0 0757 2 00 0.0452 10 00 0 1415 17.67 0 0755 2.17 0 0498 10 17 0.1311 17 83 0 0756 2 33 0 0535 10 33 0 1243 18 00 0 0756 2 50 0 0551 10 50 0 1264 18 17 0 0722 2 67 0.0569 10 67 0 1192 18 33 0 0698 2 83 0 0583 10 83 0 1148 18 50 0 0705 3 00 0 0596 11 00 0 1161 18 67 0 0703 3 17 0 0607 11 17 0.1125 18 83 0 0704 3.33 0 0617 11 33 0 1103 19 00 0 0704 3 50 0 0626 11 50 0 1110 19 17 0 0669 3 67 0 0659 11 67 0 1076 19 33 0 0645 3 83 0 0684 11 83 0 1053 19 50 0 0652 4 00 0 0687 12 00 0 1061 19 67 0 0650 4 17 0 0746 12 17 0 1025 19 83 0 0651 4 33 0 0790 12 33 0 1003 20 00 0 0651 4 50 0 0787 12 50 0 1010 20 17 0 0651 4 67 0 0848 12 67 0 0975 20 33 0 0651 4 83 0.0892 12 83 0 0952 20 50 0 0651 5 00 0.0894 13 00 0 0959 20 67 0 0651 5 17 0 0960 13 17 0 0958 20 83 0 0652 5 33 0 1009 13.33 0 0959 21 00 0 0652 5 50 0 1009 13 50 0 0959 21 17 0 0652 5 67 0 1077 13 67 0 0926 21 33 0 0652 5 83 0 1127 13 83 0 0902 21 50 0 0652 6 00 0 1126 14 00 0 0910 21 67 0 0652 6 17 0 1254 14 17 0 0908 21 83 0 0653 6.33 0 1347 14 33 0 0909 22 00 0 0653 6 50 0 1336 14 50 0 0909 22 17 0 0618 6 67 0.1530 14 67 0 0876 22 33 0 0593 6 83 0 1669 14 83 0 0852 22 50 0 0600 7 00 0 1648 15 00 0 0859 22 67 0 0598 7 17 0.1883 15 17 0 0857 22 83 0 0599 7 33 0 2047 15 33 0 0859 23 00 0 0599 7 50 0 2022 15 50 0 0859 23 17 0 0599 7 67 0 4338 15 67 0 0825 23 33 0 0599 7 83 0 6031 15 83 0 0801 23 50 0 0600 8 00 0 5678 16 00 0 0808 23 67 0 0600 8 17 0 3913 16 17 0 0806 23 83 0 0600 8 33 0 2504 16 33 0 0807 24 00 0 0600 8.50 0 2908 16 50 0 0807 24 17 0 0213 Hydrograph ID: BASIN H Area: 0.7064 ac Hyd Int: 10.00 min Base Flow. Peak Flow: 0 6031 cfs Peak Time 7 83 hrs Hyd Vol: 0.1996 acft MOVEHYD [BASIN H] TO [BASIN H - 6 mo] AS [6 mo] Peak Flow• 0 1606 cfs Peak Time• 7.83 hrs Hyd Vol: 2256 41 cf - 0 0518 acft MOVEHYD [BASIN H] TO [BASIN H - 100 yr] AS [100 yr] Peak Flow: 0.6031 cfs Peak Time: 7.83 hrs Hyd Vol 8692.48 cf - 0.1996 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp: Multiple Orifice Start EI Max EI Increment 328.0000 ft 333.9000 ft 0.10 Infd• 10 00 in/hr Multiplier. 1.00 Reach ID: BIOSWALE H Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 160 0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY H 0 0000 ft Conduit Constraints: Mln Vel Max Vel Mln Cov 0.5000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0 000000 ft Routing Method. Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh 1v Dn Invert 0.0000 ft Mln Slope Max Slope Min drop 0 5000 ft 1.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN H - 6 MO] THRU [BIOSWALE H] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE H 0 7064 0 1606 ---- 1 00 0 0575 Ditch 0 4679 ----- BASIN H ROUTEHYD [BASIN H - 100 YR] THRU [BIOSWALE H] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE H 0 7064 0 6031 ---- 1 00 0 1246 Ditch 0 7094 ----- BASIN H Node ID: INFILTRATION H Desc~ Manhole structure Start EI 333.9000 ft Max EI~ 334 9000 ft Contrlb Basin: Contrlb Hyd. Length Width Vold Ratio 160.0000 ft 10.0000 ft 39.00 Node ID: BASIN H RPL Desc. Manhole structure Start EI 333.9000 ft Max EI 334.9000 ft Contrlb Basin: Contrlb Hyd' Storage Id INFILTRATION H Discharge Id INFILTRATION RLPCOMPUTE [BASIN H RPL] SUMMARY 100 YR Match O: 0 6031 cfs Peak Out O' 0.1992 cfs -Peak Stg 334 84 ft -Active Vol 1153 29 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -H Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin H Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: l.ll IMPERVIOUS: 1.3 DEVELOPED LAND USE Basin Basin H Flows To Bio-Infiltration Swale H Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.11 IMPERVIOUS: 1.3 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale H Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, r, e., ~ , ,,., uepth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 333.9 0.037 0.000 0.000 0.000 333.5 0.039 0.003 0.000 0.370 333.6 0.040 0.006 0.000 0.370 333.6 0.042 0.009 0.000 0.370 333.7 0.094 0.013 0.000 0.370 td'~,, ~-~ ~' c`'~ G. , yOgEPH p,~ `'~ ~7 , QoF wAS~ N~l~~, _°'~~ ~~ i13 ~. "~.1~ ~ R sss_t ~ ~ ~~~STE~~~ `~~ ~ `~ I ~~~~~ ~9~~'05 IXPIRES: it-21- 333.8 0.096 0.016 0.000 0.370 333.9 0.047 0.020 0.000 0.370 333.9 0.049 0.023 0.411 0.370 334.0 0.051 0.027 1.873 0.370 334.1 0.053 0.031 3.920 0.370 334.2 0.055 0.036 6.416 0.370 339.3 0.057 0.040 9.292 0.370 339.3 0.058 0.044 12.50 0.370 334.4 0.060 0.049 16.01 0.370 334.5 0.062 0.054 19.81 0.370 334.6 0.064 0.059 23.86 0.370 334.6 0.066 0.064 28.15 0.370 334.7 0.068 0.069 32.67 0.370 339.8 0.069 0.079 37.42 0.370 334.9 0.071 0.080 42.37 0.370 335.0 0.073 0.085 47.53 0.370 335.0 0.075 0.091 52.88 0.370 335.1 0.077 0.097 58.91 0.370 335.2 0.079 0.103 64.13 0.370 335.3 0.081 0.109 70.02 0.370 335.3 0.083 0.116 76.08 0.370 335.4 0.085 0.122 82.31 0.370 335.5 0.086 0.129 88.70 0.370 335.6 0.088 0.136 95.24 0.370 335.7 0.090 0.142 101.9 0.370 335.7 0.092 0.150 108.8 0.370 335.8 0.094 0.157 115.8 0.370 335.9 0.096 0.169 12?_.9 0.370 336.0 0.098 0.17?_ 130.2 0.370 336.0 0.100 0.179 137.6 0.370 336.1 0.102 0.187 145.2 0.370 336.2 0.104 0.195 152.9 0.370 336.3 0.106 0.204 160.7 0.370 336.4 0.108 0.212 168.6 0.370 336.9 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.995482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(efs) 2 year 0.326601 5 year 0.397868 10 year 0.492081 25 year 0.495482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Mita.gated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.309 0.000 1957 0.498 0.078 1958 0.286 0.000 1959 0.334 0.000 1960 0.368 0.000 1961 0.245 0.000 1962 0.269 0.000 1963 0.532 0.040 1964 0.384 0.000 1965 0.361 0.000 1966 0.254 0.000 1967 0.311 0.000 1968 0.243 0.000 1969 0.241 0.000 1970 0.240 0.000 1971 0.298 0.000 1972 0.358 0.000 1973 0.282 0.000 1974 0.329 0.000 1975 0.285 0.000 1976 0.328 0.000 1977 0.915 0.000 1978 0.353 0.000 1979 0.920 0.000 1980 0.315 0.000 1981 0.360 0.000 1982 0.416 0.000 1983 0.446 0.020 1984 0.272 0.000 1985 0.314 0.000 1986 0.350 0.000 1987 0.377 0.000 1988 0.208 0.000 1989 0.249 0.000 1990 0.491 0.031 1991 0.500 0.029 1992 0.306 0.000 1993 0.224 0.000 1994 0.249 0.000 1995 0.361 0.000 1996 0.367 0.000 1997 0.295 0.000 1998 0.414 0.000 1999 0.355 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5001 0.0403 2 0.4979 0.0313 3 0.4913 0.0295 4 0.4457 0.0196 5 0.4199 0.0000 6 0.4163 0.0000 7 0.4152 0.0000 8 0.9138 0.0000 9 0.3894 0.0000 10 0.3772 0.0000 11 0.3675 0.0000 12 0.3666 0.0000 13 0.3613 0.0000 14 0.3611 0.0000 15 0.3604 0.0000 16 0.3583 0.0000 17 0.3554 0.0000 18 0.3527 0.0000 19 0.3509 0.0000 20 0.3339 0.0000 0.3289 0.0000 0.3284 0.0000 0.3149 0.0000 0.3145 0.0000 0.3111 0.0000 0.3090 0.0000 0.3063 0.0000 0.2984 0.0000 0.2953 0.0000 0.2860 0.0000 0.2899 0.0000 0.2824 0.0000 0.2720 0.0000 0.2637 0.0000 0.2540 0.0000 0.2494 0.0000 0.2494 0.0000 0.2451 0.0000 0.2435 0.0000 0.2405 0.0000 0.2401 0.0000 0.2244 0.0000 0.2084 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1633 1047 0 .0 Pass 0.1670 972 0 .0 Pass 0.1708 916 0 .0 Pass 0.1745 843 0 .0 Pass 0.1783 785 0 .0 Pass 0.1820 713 0 .0 Pass 0.1858 673 0 .0 Pass 0.1895 624 0 .0 Pass 0.1932 580 0 .0 Pass 0.1970 542 0 .0 Pass 0.2007 504 0 .0 Pass 0.2095 459 0 .0 Pass 0.2082 929 0 .0 Pass 0.2120 400 0 .0 Pass 0.2157 362 0 .0 Pass 0.2199 339 0 .0 Pass 0.2232 315 0 .0 Pass 0.2269 301 0 .0 Pass 0.2307 278 0 .0 Pass 0.2344 254 0 .0 Pass 0.2382 238 0 .0 Pass 0.2419 224 0 .0 Pass 0.2456 203 0 .0 Pass 0.2494 189 0 .0 Pass 0.253] 172 0 .0 Pass 0.2569 167 0 .0 Pass 0.2606 161 0 .0 Pass 0.2644 159 0 .0 Pass 0.2681 145 0 .0 Pass 0.2718 143 0 .0 Pass 0.2756 138 0 .0 Pass 0.2793 136 0 .0 Pass 0.2831 121 0 .0 Pass 0.2868 117 0 .0 Pass 0.2906 110 0 .0 Pass 0.2943 103 0 .0 Pass 0.2980 96 0 .0 Pass 0.3018 91 0 .0 Pass 0.3055 87 0 .0 Pass 0.3093 82 0 .0 Pass 0.3130 74 0 .0 Pass 0.3168 69 0 .0 Pass 0.3205 66 0 .0 Pass 0.3292 60 0 .0 Pass 0.3280 59 0 .0 Pass 0.3317 54 0 .0 Pass 0.3355 50 0 .0 Pass 0.3392 46 0 .0 Pass 0.3430 46 0 .0 Pass 0.3467 41 0 .0 Pass 0.3504 38 0 .0 Pass 0.3542 36 0 .0 Pass 0.3579 34 0 .0 Pass 0.3617 28 0 .0 Pass 0.3654 26 0 .0 Pass 0.3692 23 0 .0 Pass 0.3729 23 0 .0 Pass 0.3766 20 0 .0 Pass 0.3804 19 0 .0 Pass 0.3841 17 0 .0 Pass 0.3879 16 0 .0 Pass 0.3916 16 0 .0 Pass 0.3954 16 0 .0 Pass 0.3991 15 0 .0 Pass 0.9028 14 0 .0 Pass 0.4066 12 0 .0 Pass 0.4103 12 0 .0 Pass 0.4141 11 0 .0 Pass 0.4178 9 0 .0 Pass 0.4216 8 0 .0 Pass 0.4253 8 0 .0 Pass 0.9291 8 0 .0 Pass 0.4328 8 0 .0 Pass 0.4365 8 0 .0 Pass 0.9403 6 0 .0 Pass 0.4440 6 0 .0 Pass 0.4478 5 0 .0 Pass 0.9515 5 0 .0 Pass 0.4553 5 0 .0 Pass 0.4590 5 0 .0 Pass 0.9627 5 0 .0 Pass 0.4665 5 0 .0 Pass 0.4702 5 0 .0 Pass 0.4740 5 0 .0 Pass 0.9777 5 0 .0 Pass 0.9815 5 0 .0 Pass 0.4852 5 0 .0 Pass 0.4889 5 0 .0 Pass 0.4927 4 0 .0 Pass 0.4964 4 0 .0 Pass 0.5002 2 0 .0 Pass 0.5039 1 0 .0 Pass 0.5077 1 0 .0 Pass 0.5114 1 0 .0 Pass 0.5151 1 0 .0 Pass 0.5189 1 0 .0 Pass 0.5226 1 0 .0 Pass 0.5264 1 0 .0 Pass 0.5301 1 0 .0 Pass 0.5339 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.012 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.05 cfs. Adjusted for 15 min: 0.06 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. e 1iQ0 kkk3~;~ki~kkkYX~0~4~C+~~+ryt•+3Q•~~pCyckkkkkkk ~ 1.0 ...~ 01 ~ x~ooecboaaaaaa44a ~ aoa~~o~~'`°'~"~ o Predeveloped U t0E-t x Oevelope~~,Atitigated ~ k C1 1OE-2 1 10 20 30 dO 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEAR .FLOW (cts} 100' ,4SQ0 --;------ 1 , 3 ° ~ o Predeveloped 54 ~'~~ A q x Developed ~~h Facilit~t 25 ` 3895 0 35 v - - _ e 10 ~ .3469 ~ 0 27 ° , - - _ 5 3117 tJ '"" 0 20 d> 2 2551 ~, _ _ _~_ ._ ~ 013 - _. L U _N ,,, ~ 10E-5 ~ 10E•4 10E•3 1UE-2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR FLOW (cts} 100 1138 ;' ~, ~' a 50 ~ 7 701 --~---~ ~ i ' ' ; ' ' ~ ; ' 1z :: ~ f 2S 5045 ~ °~-~- ~ ~ ~ ~, ~ € ~ ; 1Q 2.~1 ._.~»~.~. z , ~: ~ 5 1518 ;~ _ ~~ 2 5~9 ~ ~._.~_._, early Peaks for Developed W/Pond CLEARHIS BSN H1 Event Summary: BasinlD Peak Q Peak _r Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H1 0 07 7 83 0 0236 0 33 SBUH/SCS TYPEIA 6 mo BSN H1 0 12 7 83 0 0408 0 33 SBUH/SCS TYPE1A 2 yr BSN H1 0 20 7 83 0 0660 0 33 SBUH/SCS TYPEIA 10 yr BSN H1 0 24 7 83 0 0788 0 33 SBUH/SCS TYPEIA 25 yr BSN H1 0 26 7 83 0 0853 0 33 SBUH/SCS TYPEIA 50 yr BSN H1 0 27 7 83 0 0918 0 33 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN H1 Hyd Method: SBUH Hyd Loss Method. SCS CN Number Peak Factor 484 00 SCS Abs. 0.20 Storm Dur 24.00 hrs Intv. 10 00 min Area CN TC Pervious 0.0727 ac 78 00 0.03 hrs Impervious 0 2562 ac 98.00 0 06 hrs Total 0.3289 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0727 ac Impervious CN Data: ROADWAY 98.00 0.1437 ac SIDWALK 98.00 0 0212 ac DRIVEWAY 98 00 0.0913 ac Pervious TC Data: Flow type• Description. Length• Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description: Length Slope. Coeff• Travel Time Shallow Along Flow Line of Gutter 186 00 ft 0.54% 27.0000 1.56 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0 40 mm Channel Through Strom Water Pipe 80 00 ft 0 50% 21.0000 0.90 min Sheet Across Sidewalks 5 00 ft 2 00% 0.0110 0.14 min Sheet Across Driveway 20 00 ft 2 00% 0 0110 0.42 min BSN H2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H2 0 03 7 83 0 0100 0 14 SBUH/SCS TYPEIA 6 mo BSN H2 0 05 7 83 0 0174 0 14 SBUH/SCS TYPEIA 2 yr BSN H2 0 08 7 83 0 0283 0 14 SBUH/SCS TYPEIA 10 yr BSN H2 0 10 7 83 0 0339 0 14 SBUH/SCS TYPEIA 25 yr BSN H2 0 11 7 83 0 0367 0 14 SBUH/SCS TYPE1A 50 yr BSN H2 0 12 7 83 0 0396 0 14 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN H2 Hyd Method• SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484 00 SCS Abs 0 20 Storm Dur: 24 00 hrs Intv: 10.00 min Area CN TC Pervious 0.0363 ac 78 00 0 03 hrs Impervious 0.1079 ac 98 00 0 06 hrs Total 0.1442 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0363 ac Impervious CN Data: ROADWAY 98 00 0.0712 ac DRIVEWAY 98.00 0.0367 ac Pervious TC Data: Flow type: Description• Length. Slope Coeff: Travel Time Sheet Across Planter Stnp 6 00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type Description Length. Slope: Coeff Travel Time Shallow Along Flow Lme of Gutter 184 00 ft 0 50% 27 0000 2 13 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe 50 00 ft 0 50% 21 0000 0.56 min Sheet Across Driveway 20.00 ft 2 00% 0 0110 0.42 min BSN H3 Event Summary: BasinlD Peak O Peak T Peak Vol Are a Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H3 0.06 7 83 0 0182 0 23 SBUH/SCS TYPEIA 6 mo BSN H3 0.10 7 83 0 0310 0 23 SBUHlSCS TYPEIA 2 yr BSN H3 0 15 7 83 0 0494 0 23 SBUH/SCS TYPEIA 10 yr BSN H3 0 18 7 83 0 0587 0.23 SBUH/SCS TYPEIA 25 yr BSN H3 0 20 7 83 0 0634 0 23 SBUH/SCS TYPEIA 50 yr BSN H3 0 21 7 83 0 0681 0 23 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN H3 Hyd Method: SBUH Hyd Loss Method: SC S CN Number Peak Factor: 484.00 SCS Abs: 0 2 0 Storm Dur• 24.00 hrs Intv: 10 00 min Area CN TC Pervious 0.0324 ac 78 00 0.03 hrs Impervious 0.2009 ac 98 00 0.04 hrs Total 0.2333 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0 0324 ac Impervious CN Data: ROADWAY 98 00 0 0862 ac DRIVEWAY 98 00 0 1147 ac Pervious TC Data: Flow type: Description Length: Slope Coeff• Travel Time Sheet Across Planter Stnp 6 00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type: Description• Length. Slope Coeff: Travel Time Shallow Along Flow Line of Gutter 125 00 ft 1 02% 27 0000 0 76 min Sheet Across Roadway 16 00 ft 2 00% 0 0110 0 35 min Channel Through Strom Water Pipe 80 00 ft 0.50% 21.0000 0.90 min Sheet Across Sidewalks 5 00 ft 2 00% 0.0110 0.14 min ADDHYD [BSN H1] AS [6 mo] [BSN H2] AS [6 mo] TO [BSN H1 +BSN H2] Peak Flow 0 1006 cfs Peak Tirne 7 83 hrs Hyd Vol: 1463 86 cf - 0.0336 acft ADDHYD [BSN H1] AS [2 yr] [BSN H2] AS [2 yr] TO [BSN H1 +BSN H2] Peak Flow 0 1723 cfs Peak Time• 7.83 hrs Hyd Vol 2537.14 cf - 0 0582 acft ADDHYD [BSN H1) AS [10 yr] [BSN H2] AS [10 yr] TO [BSN H1 +BSN H2] Peak Flow• 0 2807 cfs Peak Time 7 83 hrs Hyd Vol 4106 23 cf - 0 0943 acft ADDHYD [BSN H1] AS (25 yr] [BSN H2] AS [25 yr] TO [BSN H1 +BSN H2] Peak Flow. 0 3363 cfs Peak Time. 7 83 hrs Hyd Vol 4910 93 cf - 0.1127 acft ADDHYD [BSN H1] AS [50 yr] (BSN H2] AS [50 yr] TO [BSN H1 +BSN H2] Peak Flow: 0 3644 cfs Peak Time• 7.83 hrs Hyd Vol: 5316 54 cf - 0.1221 acft ADDHYD [BSN H1] AS (100 yr] [BSN H2] AS [100 yr] TO [BSN H1 +BSN H2] Peak Flow 0.3927 cfs Peak Time. 7.83 hrs Hyd Vol• 5724.05 cf - 0.1314 acft ADDHYD [BSN H1 +BSN H2] AS [6 mo] (BSN H3] AS [6 mo] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow 0.1606 cfs Peak Time: 7 83 hrs Hyd Vol 2256.41 cf - 0 0518 acft ADDHYD [BSN H1 +BSN H2] AS [2 yr] [BSN H3] AS [2 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow• 0 2723 cfs Peak Time 7.83 hrs Hyd Vol. 3885.55 cf - 0 0892 acft ADDHYD [BSN H1 +BSN H2] AS [10 yr] [BSN H3] AS [10 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow 0 4307 cfs Peak Time 7 83 hrs Hyd Vol 6259.57 cf - 0 1437 acft ADDHYD [BSN H1 +BSN H2] AS [25 yr] [BSN H3] AS [25 yr] TO [BSN H1 +BSN H2 +BSN H 3] Peak Flow: 0.5163 cfs Peak Time• 7 83 hrs Hyd Vol. 7466 18 cf - 0.1714 acft ADDHYD [BSN H1 +BSN H2] AS [50 yr] [BSN H3] AS [50 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow. 0.5644 cfs Peak Time: 7.83 hrs Hyd Vol: 8080 38 cf - 0.1855 acft ADDHYD [BSN H1 +BSN H2] AS [100 yr] [BSN H3] AS [100 yr] TO [BSN H1 +BSN H2 + BSN H3] Peak Flow. 0.6031 cfs Peak Time: 7.83 hrs Hyd Vol. 8692 48 cf - 0.1996 acft Hydrograph ID: BASIN H Area: 0.7064 ac Hyd Int. 10.00 min Base Flow Peak Flow 0 6031 cfs Peak Time 7 83 hrs Hyd Vol: 0 1996 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0023 8 67 0 2299 16 33 0 0807 0 83 0 0083 8 83 0 2001 16 50 0 0807 1 00 0 0146 9 00 0 2085 16 67 0 0808 1 17 0 0219 9 17 0 1734 16 83 0 0808 1 33 0 0285 9 33 0 1510 17 00 0 0808 1 50 0 0326 9 50 0 1575 17 17 0 0774 1 67 0 0381 9 67 0 1457 17 33 0 0750 1 83 0 0426 9 83 0 1396 17 50 0 0757 2.00 0 0452 10 OU 0 1415 17 67 0 0755 2 17 0 0498 10 17 0 1311 17 83 0 0756 2 33 0 0535 10 33 0 1243 18 00 0 0756 2.50 0 0551 10 50 0 1264 18 17 0 0722 2 67 0 0569 10 67 0 1192 18 33 0 0698 2 83 0 0583 10 83 0 1148 18 50 0 0705 3 00 0 0596 11 00 0 1161 18 67 0 0703 3 17 0 0607 11 17 0 1125 18 83 0 0704 3 33 0 0617 11 33 0 1103 19 00 0 0704 3 50 0 0626 11 50 0 1110 19 17 0 0669 3 67 0 0659 11 67 0 1076 19 33 0 0645 3 83 0 0684 11 83 0 1053 19 50 0 0652 4 00 0 0687 12 00 0 1061 19 67 0 0650 4 17 0 0746 12 17 0 1025 19 83 0 0651 4 33 0 0790 12 33 0 1003 20 00 0 0651 4 50 0 0787 12 50 0 1010 20 17 0 0651 4 67 0 0848 12 67 0 0975 20 33 0 0651 4 83 0 0892 12 83 0 0952 20 50 0 0651 5 00 0 0894 13 00 0 0959 20 67 0 0651 5 17 0 0960 13 17 0 0958 20 83 0 0652 5 33 0 1009 13 33 0 0959 21 00 0 0652 5 50 0 1009 13 50 0 0959 21 17 0 0652 5 67 0 1077 13 67 0 0926 21 33 0 0652 5 83 0 1127 13 83 0 0902 21 50 0 0652 6 00 0 1126 14 00 0 0910 21 67 0 0652 6 17 0 1254 14 17 0 0908 21 83 0 0653 6 33 0.1347 14 33 0 0909 22 00 0 0653 6 50 0 1336 14 50 0 0909 22 17 0 0618 6 67 0 1530 14 67 0 0876 22 33 0 0593 6 83 0 1669 14 83 0 0852 22 50 0 0600 7 00 0 1648 15 00 0 0859 22.67 0 0598 7 17 0 1883 15 17 0 0857 22 83 0 0599 7 33 0 2047 15 33 0 0859 23 00 0 0599 7 50 0 2022 15 50 0 0859 23 17 0 0599 7 67 0 4338 15 67 0 0825 23 33 0 0599 7 83 0 6031 15 83 0 0801 23 50 0 0600 8 00 0 5678 16 00 0 0808 23 67 0 0600 8 17 0 3913 16 17 0 0806 23 83 0 0600 8 33 0 2504 16 33 0 0807 24 00 0 0600 8 50 0 2908 16 50 0 0807 24 17 0 0213 Hydrograp h ID: BASIN H Area. 0.7064 ac Hyd Int: 10 00 min Base Flow: Peak Flow. 0.6031 cfs Peak Time: 7 83 hrs Hyd Vol: 0 1996 acft MOVEHYD [BASIN H] TO [BASIN H - 6 mo] AS [6 mo] Peak Flow: 0.1606 cfs Peak Time: 7.83 hrs Hyd Vol 2256.41 cf - 0 0518 acft MOVEHYD [BASIN H] TO [BASIN H - 100 yr] AS [100 yr] Peak Flow 0.6031 cfs Peak Time. 7.83 hrs Hyd Vol. 8692 48 cf - 0 1996 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip~ Multiple Orifice Start EI Max EI Increment 328.0000 ft 333 9000 ft 0.10 Infil. 10 00 in/hr Multiplier 1 00 J Reach ID: BIOSWALE H Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 160.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh.1 v Up Node Dn Node Up Invert DUMMY H 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0 5000 ft 1 0000 ft 3 0000 ft InlExfil Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0.0000 cf 0.0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0 000000 ft Routing Method Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3.OOh.1 v Dn Invert 0.0000 ft Mm Slope Max Slope Min drop 0 5000 ft 1 0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN H - 6 MO] THRU [BIOSWALE H] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin /Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE H 0 7064 0 1606 ---- 1 00 0 0575 Ditch 0 4679 ----- BASIN H ROUTEHYD [BASIN H - 100 YR] THRU [BIOSWALE H] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin /Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE H 0 7064 0 6031 ---- 1 00 0 1246 Ditch 0 7094 ----- BASIN H Node ID: INFILTRATION H Desc. Manhole structure Start EI• 333.9000 ft Max EI• 334.9000 ft Contrib Basin. Contrib Hyd: Length Width Void Ratio 160.0000 ft 10 0000 ft 39 00 Node ID: BASIN H RPL Desc: Manhole structure Start EI• 333 9000 ft Max EI 334 9000 ft Contrib Basin• Contnb Hyd. Storage Id: INFILTRATION H Discharge Id INFILTRATION RLPCOMPUTE [BASIN H RPL] SUMMARY 100 YR Match O: 0.6031 cfs Peak Out O. 0 1992 cfs -Peak Stg: 334 84 ft -Active Vol• 1153 29 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -H Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin H Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: l.ll IMPERVIOUS: 1.3 DEVELOPED LAND USE Basin Basin H Flows To Bio-Infiltration Swale H Groundwater: Yes Land Use Acres OUTWASH GRASS: l.ll IMPERVIOUS: 1.3 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale H Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. r~,me„~,,.~~ Depth: aft. Bottom Length: 160ft. Bottom Wa.dth loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.021 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-£t) Dschrg(cfs) Znfilt(cfs) 333.4 0.037 0.000 0.000 0.000 333.5 0.039 0.003 0.000 0.370 333.6 0.040 0.006 0.000 0.370 333.6 0.042 0.009 0.000 0.370 333.7 0.044 0.013 0.000 0.370 R."~ ~~~ e;,: ~~ y~gEPH Dq~~ ~oF waste . ~O ~e~ ~o ~ _" ~ = A~i "~.~ tr 3455 /~ ~ ~~DISTEK~~ ~~r~' ~ 333.8 0.046 0.016 0.000 0.370 333.9 0.047 0.020 0.000 0.370 '333.9 0.049 0.023 0.411 0.370 334. 0 0.051 0.027 1 . 8 73 0. 3"10 334.1 0.053 0.031 3.920 0.370 339.2 0.055 0.036 6.416 0.370 339.3 0.057 0.040 9.292 0.3"10 334.3 0.058 0.044 12.50 0.370 339.4 0.060 0.049 16.01 0.370 334.5 0.062 0.054 19.81 0.370 334.6 0.064 0.059 23.86 0.370 334.6 0.066 0.064 28.15 0.370 339.7 0.068 0.069 32.67 0.310 334.8 0.069 0.079 37.92 0.370 339.9 0.071 0.080 42.37 0.370 335.0 0.073 0.085 47.53 0.370 335.0 0.075 0.091 52.88 0.370 335.1 0.077 0.097 58.41 0.370 335.2 0.079 0.103 64.13 0.370 335.3 0.081 0.109 70.02 0.370 335.3 0.083 0.116 76.08 0.370 335.4 0.085 0.122 82.31 0.370 335.5 0.086 0.129 88.70 0.370 335.6 0.088 0.136 95.24 0.370 335.7 0.090 0.142 101.9 0.370 335.7 0.092 0.150 108.8 0.370 335.8 0.094 0.157 115.8 0.370 335.9 0.096 0.164 122.9 0.370 336.0 0.098 0.172 130.?_ 0.370 336.0 0.100 0.179 137.6 0.370 336.1 0.102 0.187 145.2 0.370 336.2 0.104 0.195 152.9 0.370 336.3 0.106 0.204 160.7 0.370 336.4 0.108 0.212 168.6 0.370 336.4 0.110 0.220 176.7 0.370 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Flow (cfs ) Predeveloped 0.326601 0.397868 0.492081 0.495482 0.533853 0.571254 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.495482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Ma.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Ntitigated Year Predeveloped Developed `1956 0.309 0.000 1957 0.498 0.078 1958 0.286 0.000 1959 0.334 0.000 1960 0.368 0.000 1961 0.2_45 0.000 1962 0.2.64 0.000 1963 0.532 0.090 1964 0.389 0.000 1965 0.361 0.000 1966 0.259 0.000 1967 0.311 0.000 1968 0.243 0.000 1969 0.241 0.000 1970 0.240 0.000 1971 0.298 0.000 1972 0.358 0.000 1973 0.282 0.000 1979 0.329 0.000 1975 0.285 0.000 1976 0.328 0.000 1977 0.415 0.000 1978 0.353 0.000 1979 0.420 0.000 1980 0.315 0.000 1981 0.360 0.000 1982 0.416 0.000 1983 0.446 0.020 1984 0.272 0.000 1985 0.314 0.000 1986 0.350 0.000 1987 0.377 0.000 1988 0.208 0.000 1989 0.249 0.000 1990 0.491 0.031 1991 0.500 0.029 1992 0.306 0.000 1993 0.224 0.000 1994 0.249 0.000 1995 0.361 0.000 1996 0.367 0.000 1997 0.295 0.000 1998 0.414 0.000 1999 0.355 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5001 0.0903 2 0.4979 0.0313 3 0.4913 0.0295 4 0.4457 0.0196 5 0.4199 0.0000 6 0.4163 0.0000 7 0.4152 0.0000 8 0.4138 0.0000 9 0.3894 0.0000 10 0.3772 0.0000 11 0.3675 0.0000 12 0.3666 0.0000 13 0.3613 0.0000 14 0.3611 0.0000 15 0.3604 0.0000 16 0.3583 0.0000 17 0.3554 0.0000 18 0.3527 0.0000 19 0.3504 0.0000 20 0.3339 0.0000 0.3289 0.0000 0.3284 0.0000 0.3149 0.0000 0.3145 0.0000 0.3111 0.0000 0.3090 0.0000 0.3063 0.0000 0.2984 0.0000 0.2953 0.0000 0.2860 0.0000 0.2849 0.0000 0.2824 0.0000 0.2720 0.0000 0.2637 0.0000 0.2540 0.0000 0.2494 0.0000 0.2494 0.0000 0.2451 0.0000 0.2435 0.0000 0.2405 0.0000 0.2401 0.0000 0.2244 0.0000 0.2084 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1633 1047 0 .0 Pass 0.1670 972 0 .0 Pass 0.1708 916 0 .0 Pass 0.1745 843 0 .0 Pass 0.1783 785 0 .0 Pass 0.1820 713 0 .0 Pass 0.1858 673 0 .0 Pass 0.1895 624 0 .0 Pass 0.1932 580 0 .0 Pass 0.1970 542 0 .0 Pass 0.2007 504 0 .0 Pass 0.2045 959 0 .0 Pass 0.2082 429 0 .0 Pass 0.2120 400 0 .0 Pass 0.2157 362 0 .0 Pass 0.2194 339 0 .0 Pass 0.2232 315 0 .0 Pass 0.2269 301 0 .0 Pass 0.2307 278 0 .0 Pass 0.2344 254 0 .0 Pass 0.2382 238 0 .0 Pass 0.2419 224 0 .0 Pass 0.2456 203 0 .0 Pass 0.2494 189 0 .0 Pass 0.2531 172 0 .0 Pass 0.2569 167 0 .0 Pass 0.2606 161 0 .0 Pass 0.2644 154 0 .0 Pass 0.2681 145 0 .0 Pass 0.2718 193 0 .0 Pass 0.2756 138 0 .0 Pass 0.2793 136 0 .0 Pass 0.2831 12_1 0 .0 Pass 0.2868 117 0 .0 Pass 0.2906 110 0 .0 Pass 0.2943 103 0 .0 Pass 0.2980 96 0 .0 Pass 0.3018 91 0 .0 Pass 0.3055 87 0 .0 Pass 0.3093 82 0 .0 Pass 0.3130 74 0 .0 Pass 0.3168 69 0 .0 Pass 0.3205 66 0 .0 Pass 0.3242 60 0 .0 Pass 0.3280 59 0 .0 Pass x.3317 54 0 .0 Pass 0.3355 50 0 .0 Fass 0.3392 46 0 .0 Pass 0.3930 46 0 .0 Pass 0.3467 91 0 .0 Pass 0.3504 38 0 .0 Pass 0.3592 36 0 .0 Pass 0.3579 34 0 .0 Pass 0.3617 28 0 .0 Pass 0.3654 26 0 .0 Pass 0.3692 23 0 .0 Pass 0.3729 23 0 .0 Pass 0.3766 20 0 .0 Pass 0.3804 19 0 .0 Pass 0.3891 17 0 .0 Pass 0.3879 16 0 .0 Pass 0.3916 16 0 .0 Pass 0.3954 16 0 .0 Pass 0.3991 15 0 .0 Pass 0.4028 14 0 .0 Pass 0.9066 12 0 .0 Pass 0.4103 12 0 .0 Pass 0.4141 11 0 .0 Pass 0.4178 9 0 .0 Pass 0.4216 8 0 .0 Pass 0.4253 8 0 .0 Pass 0.4291 8 0 .0 Pass 0.4328 8 0 .0 Pass 0.4365 8 0 .0 Pass 0.4403 6 0 .0 Pass 0.4440 6 0 .0 Pass 0.4478 5 0 .0 Pass 0.4515 5 0 .0 Pass 0.4553 5 0 .0 Pass 0.4590 S 0 .0 Pass 0.4627 5 0 .0 Pass 0.9665 5 0 .0 Pass 0.4702 5 0 .0 Pass 0.4740 5 0 .0 Pass 0.4777 5 0 .0 Pass 0.9815 5 0 .0 Pass 0.4852 5 0 .0 Pass 0.4889 5 0 .0 Pass 0.4927 4 0 .0 Pass 0.4964 4 0 .0 Pass 0.5002 2 0 .0 Pass 0.5039 1 0 .0 Pass 0.5077 1 0 .0 Pass 0.5114 1 0 .0 Pass 0.5151 1 0 .0 Pass 0.5189 1 0 .0 Pass 0.5226 1 0 .0 Pass 0.5264 1 0 .0 Pass 0.5301 1 0 .0 Pass 0.5339 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.012 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 m~.n: 0.08 cfs. Off-line facility target flow: 0.05 cfs. Adjusted for 15 min: 0.06 cfs. program and accompanying documentation as provided 'as-ts' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either er.pressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 vxxxxk;~kxxxxraaer~~~xaoo-ae~exxxxx:*xx .-. '~ 1.0 u v ~ ou~~~~~`~'~'"~ o Nedeveloped v tot:-t x Deveinpec~~iftigated .c ~ ~ O 10E,2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Prvbabili Yearly Peaks for Predeveloped Flow Frequency Chart ~ o Predeveloped ~ q x Developed w~ Facilitp 0 35 0 a ... 0 2l - - -- U `~' 0 20 - - Q> ~ 013 - _ __ t) rn _., 10E•5 ~ 10E•d 10E•3 10E-2 10E-1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR 'FLOW (cts) 14~ 1138 ~, ~ ;, 9=, ~' 50 7 781 --~---~--` ~ ~ ~ 1 ~ ~ ` S ~ 3i ii r r~ 3 255045 --- ~; i ~~ ~ ~i' ~li I F > 10 2.681 ~ -~----~~-. r ~ F. ## }; s3 t; ii S 5 1[51[8 , ° , 2 5459 ~ i •~ ~ t~ F i i early Peaks for Developed W/Pond CLEARHIS BSN H1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H1 0 07 7 83 0 0236 0 33 SBUH/SCS TYPEIA 6 mo BSN H1 0 12 7 83 0 0408 0 33 SBUH/SCS TYPE1A 2 yr BSN H1 0 20 7 83 0 0660 0 33 SBUH/SCS TYPEIA 10 yr BSN H1 0 24 7 83 0 0788 0 33 SBUH/SCS TYPE1A 25 yr BSN H1 0 26 7 83 0 0853 0 33 SBUH/SCS TYPEIA 50 yr BSN H1 0 27 7 83 0.0918 0 33 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN H1 Hyd Method SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484 00 SCS Abs• 0 20 Storm Dur: 24 00 hrs Intv. 10.00 min Area CN TC Pervious 0.0727 ac 78 00 0 03 hrs Impervious 0 2562 ac 98 00 0 06 hrs Total 0 3289 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0727 ac Impervious CN Data: ROADWAY 98.00 0.1437 ac SIDWALK 98 00 0.0212 ac DRIVEWAY 98 00 0.0913 ac Pervious TC Data: Flow type• Description. Length: Slope Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description. Length: Slope• Coeff Travel Time Shallow Along Flow Line of Gutter 186 00 ft 0 54% 27.0000 1 56 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 80 00 ft 0 50% 21.0000 0.90 min Sheet Across Sidewalks 5 00 ft 2 00% 0.0110 0.14 min Sheet Across Driveway 20 00 ft 2.00% 0.0110 0.42 min BSN H2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H2 0 03 7 83 0 0100 0 14 SBUH/SCS TYPEIA 6 mo BSN H2 0 05 7 83 0 0174 0 14 SBUH/SCS TYPE1A 2 yr BSN H2 0 08 7 83 0 0283 0 14 SBUH/SCS TYPEIA 10 yr BSN H2 0 10 7 83 0 0339 0 14 SBUH/SCS TYPE1A 25 yr BSN H2 0 11 7 83 0 0367 0 14 SBUH/SCS TYPE1A 50 yr BSN H2 0 12 7 83 0 0396 0 14 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN H2 Hyd Method. SBUH Hyd Loss Method• SCS CN Number Peak Factor: 484 00 SCS Abs 0 20 Storm Dur: 24 00 hrs Intv. 10.00 min Area CN TC Pervious 0.0363 ac 78 00 0 03 hrs Impervious 0.1079 ac 98.00 0 06 hrs Total 0 1442 ac Supporting Data: Pervious CN Data: Type B Soils 78 UO 0.0363 ac Impervious CN Data: ROADWAY 98.00 0 0712 ac DRIVEWAY 98.00 0.0367 ac Pervious TC Data: Flow type. Description: Length: Slope: Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type. Description Length Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 184.00 ft 0 50% 27 0000 2 13 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe 50 00 ft 0 50% 21.0000 0 56 mm Sheet Across Driveway 20.00 ft 2 00% 0 0110 0.42 min BSN H3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H3 0 06 7 83 0 0182 0 23 SBUH/SCS TYPE1A 6 mo BSN H3 0 10 7 83 0 0310 0 23 SBUH/SCS TYPE1A 2 yr BSN H3 0 15 7 83 0 0494 0 23 SBUH/SCS TYPE1A 10 yr BSN H3 0 18 7 83 0 0587 0 23 SBUH/SCS TYPEIA 25 yr BSN H3 0 20 7 83 0 0634 0 23 SBUH/SCS TYPE1A 50 yr BSN H3 0 21 7 83 0 0681 0 23 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN H3 Hyd Method• SBUH Hyd Peak Factor 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0324 ac 78.00 Impervious 0 2009 ac 98 00 Total 0 2333 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type. Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method. SCS CN Number SCS Abs• 0.20 Intv• 10.00 min TC 0.03 hrs 0 04 hrs 0 0324 ac 0 0862 ac 0.1147 ac Length Slope. Coeff. Travel Time 6 00 ft 2 00% 0 2400 1 90 min Length• Slope: Coeff Travel Time 125 00 ft 1.02% 27.0000 0 76 min 1600 ft 200% 00110 035 min 80.00 ft 0 50% 21.0000 0.90 min 5 00 ft 2.00% 0.0110 0.14 min ADDHYD [BSN H1] AS [6 mo] [BSN H2] AS [6 mo] TO [BSN H1 +BSN H2] Peak Flow 0 1006 cfs Peak Time. 7 83 hrs Hyd Vol 1463 86 cf - 0.0336 acft ADDHYD [BSN H1] AS [2 yr] [BSN H2] AS [2 yr] TO [BSN H1 +BSN H2] Peak Flow: 0.1723 cfs Peak Time: 7 83 hrs Hyd Vol 2537 14 cf - 0.0582 acft ADDHYD [BSN H1] AS [10 yr] [BSN H2] AS [10 yr] TO [BSN H1 +BSN H2] Peak Flow: 0 2807 cfs Peak Time• 7 83 hrs Hyd Vol 4106.23 cf - 0 0943 acft ADDHYD [BSN H1] AS [25 yr] [BSN H2] AS [25 yr] TO [BSN H1 +BSN H2] Peak Flow: 0 3363 cfs Peak Time 7.83 hrs Hyd Vol: 4910 93 cf - 0 1127 acft ADDHYD [BSN H1] AS [50 yr] [BSN H2] AS [50 yr] TO [BSN H1 +BSN H2] Peak Flow: 0 3644 cfs Peak Time 7 83 hrs Hyd Vol 5316.54 cf - 0.1221 acft ADDHYD [BSN H1] AS (100 yr] [BSN H2] AS [100 yr] TO [BSN H1 +BSN H2] Peak Flow: 0 3927 cfs Peak Time• 7 83 hrs Hyd Vol. 5724 05 cf - 0.1314 acft ADDHYD [BSN H1 +BSN H2] AS [6 mo] [BSN H3] AS [6 mo] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow• 0 1606 cfs Peak Time: 7.83 hrs Hyd Vol 2256.41 cf - 0 0518 acft ADDHYD [BSN H1 +BSN H2] AS [2 yr] [BSN H3] AS [2 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow. 0.2723 cfs Peak Time: 7.83 hrs Hyd Vol 3885 55 cf - 0.0892 acft ADDHYD [BSN H1 +BSN H2] AS [10 yr] [BSN H3] AS [10 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow: 0.4307 cfs Peak Time: 7.83 hrs Hyd Vol. 6259.57 cf - 0 1437 acft ADDHYD [BSN H1 +BSN H2] AS [25 yr] [BSN H3] AS (25 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow 0.5163 cfs Peak Time 7.83 hrs Hyd Vol: 7466 18 cf - 0.1714 acft ADDHYD [BSN H1 +BSN H2] AS [50 yr] [BSN H3] AS [50 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow. 0.5644 cfs Peak Time: 7.83 hrs Hyd Vol: 8080.38 cf - 0.1855 acft ADDHYD [BSN H1 +BSN H2] AS [100 yr] [BSN H3] AS [100 yr] TO [BSN H1 +BSN HZ + BSN H3] Peak Flow 0 6031 cfs Peak Time: 7.83 hrs Hyd Vol• 8692.48 cf - 0 1996 acft Hydrograph ID: BASIN H Area• 0.7064 ac Hyd Int. 10 00 min Base Flow• Peak Flow. 0 6031 cfs Peak Time: 7.83 hrs Hyd Vol. 0 1996 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0023 8 67 0 2299 16 33 0 0807 0 83 0 0083 8 83 0 2001 16 50 0 0807 1 00 0 0146 9 00 0 2085 16 67 0 0808 1 17 0 0219 9 17 0 1734 16 83 0 0808 1 33 0 0285 9 33 0 1510 17 00 0 0808 1 50 0 0326 9 50 0 1575 17 17 0 0774 1 67 0 0381 9 67 0 1457 17 33 0 0750 1 83 0 0426 9 83 0 1396 17 50 0 0757 2 00 0 0452 10 00 0 1415 17 67 0 0755 2.17 0 0498 10 17 0 1311 17 83 0 0756 2 33 0 0535 10 33 0 1243 18 00 0 0756 2 50 0 0551 10 50 0 1264 18 17 0 0722 2 67 0 0569 10 67 0 1192 18 33 0 0698 2 83 0 0583 10 83 0 1148 18 50 0 0705 3 00 0 0596 11 00 0 1161 18 67 0 0703 3 17 0 0607 11 17 0 1125 18 83 0 0704 3 33 0 0617 11 33 0 1103 19 00 0 0704 3.50 0 0626 11 50 0 1110 19 17 0.0669 3 67 0 0659 11 67 0 1076 19 33 0 0645 3 83 0 0684 11 83 0 1053 19 50 0 0652 4 00 0 0687 12 00 0 1061 19 67 0 0650 4 17 0 0746 12 17 0 1025 19 83 0 0651 4 33 0 0790 12 33 0 1003 20 00 0 0651 4 50 0 0787 12 50 0 1010 20 17 0 0651 4 67 0 0848 12 67 0 0975 20 33 0 0651 4 83 0 0892 12 83 0 0952 20 50 0 0651 5 00 0 0894 13.00 0 0959 20 67 0 0651 5.17 0 0960 13 17 0 0958 20 83 0 0652 5 33 0 1009 13 33 0 0959 21 00 0 0652 5 50 0 1009 13 50 0 0959 21 17 0.0652 5 67 0 1077 13 67 0 0926 21 33 0 0652 5.83 0.1127 13.83 0 0902 21 50 0 0652 6 00 0 1126 14 00 0 0910 21 67 0 0652 6 17 0 1254 14 17 0 0908 21 83 0 0653 6 33 0 1347 14 33 0 0909 22 00 0 0653 6 50 0 1336 14 50 0 0909 22 17 0 0618 6 67 0 1530 14 67 0 0876 22 33 0 0593 6 83 0 1669 14 83 0 0852 22 50 0 0600 7.00 0 1648 15 00 0 0859 22 67 0 0598 7 17 0 1883 15 17 0 0857 22 83 0 0599 7.33 0 2047 15 33 0 0859 23 00 0 0599 7 50 0 2022 15 50 0 0859 23 17 0 0599 7 67 0 4338 15 67 0 0825 23 33 0 0599 7 83 0 6031 15 83 0 0801 23 50 0 0600 8 00 0 5678 16.00 0 0808 23 67 0 0600 8 17 0 3913 16 17 0 0806 23 83 0 0600 8 33 0 2504 16 33 0 0807 24 00 0 0600 8 50 0 2908 16 50 0 0807 24 17 0 0213 Hydrograph ID: BASIN H Area. 0.7064 ac Hyd Int• 10 00 min Base Flow. Peak Flow: 0 6031 cfs Peak Time: 7 83 hrs Hyd Vol. 0 1996 acft MOVEHYD [BASIN H] TO [BASIN H - 6 mo] AS (6 mo] Peak Flow. 0.1606 cfs Peak Time 7.83 hrs Hyd Vol: 2256 41 cf - 0.0518 acft MOVEHYD [BASIN H] TO [BASIN H - 100 yr] AS [100 yr] Peak Flow 0.6031 cfs Peak Time. 7.83 hrs Hyd Vol: 8692.48 cf - 0.1996 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp: Multiple Orifice Start EI Max EI Increment 328.0000 ft 333.9000 ft 0.10 Infil: 10 00 in/hr Multiplier 1 00 0 Reach ID: BIOSWALE H Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 160 0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY H 0 0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov 0 5000 ft 1.0000 ft 3.0000 ft In/Exfll Hold Up Hold Dn 10.0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh~1v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0 5000 ft 1.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN H - 6 MO] THRU [BIOSWALE H] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE H 0 7064 0 1606 ---- 1 00 0 0575 Ditch 0 4679 ----- BASIN H ROUTEHYD [BASIN H - 100 YR] THRU [BIOSWALE H] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE H 0 7064 0 6031 ---- 1 00 0 1246 Ditch 0 7094 ----- BASIN H Node ID: INFILTRATION H Desc. Manhole structure Start EI~ 333.9000 ft Max EI: 334.9000 ft Contrib Basin: Contrib Hyd. Length Width Void Ratio 160.0000 ft 10 0000 ft 39 00 Node ID: BASIN H RPL Desc Manhole structure Start EI: 333.9000 ft Max EI. 334.9000 ft Contnb Basin. Contrib Hyd Storage Id~ INFILTRATION H Discharge Id' INFILTRATION RLPCOMPUTE [BASIN H RPL] SUMMARY 100 YR Match O' 0 6031 cfs Peak Out O. 0.1992 cfs -Peak Stg 334 84 ft -Active Vol 1153 29 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -FI Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.£30 PREDEVELOPED LAND USE Basin Basin H Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: l.ll IMPERVIOUS: 1.3 DEVELOPED LAND USE Basin Basin H Flows To Bio-Infiltration Swale H Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.11 IMPERVIOUS: 1.3 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale H Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. T~imcnc~r... c. lleptri: aft . Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infalt(cfs) 333.4 0.037 0.000 0.000 0.000 333.5 0.039 0.003 0.000 0.370 333.6 0.040 0.006 0.000 0.370 333.6 0.042 0.009 0.000 0.370 333.7 0.044 0.013 0.000 0.370 ~~ ~~ ~- e~~~, ~~gEPH D,~f~ ,' e0p WASH `CO ~ y~~ Y~~/JZi ~- _ t~ $ ~F~~STEKE~ ~ ~ ~~ j ~A~~~ ~ ~9~~~0J~ EXPIRES: 11-22- V f 333:8 0.046 0.016 0.000 0.370 333.9 0.047 0.020 0.000 0.370 333.9 0.099 0.023 0.417_ 0.370 334.0 0.051 0.027 1.873 0.370 334.1 0.053 0.031 3.920 0.370 334.2 0.055 0.036 6.416 0.370 334.3 0.057 0.040 9.292 0.370 334.3 0.058 0.044 12.50 0.370 339.4 0.060 0.049 16.01 0.370 334.5 0.062 0.054 19.81 0.370 339.6 0.064 0.059 23.86 0.370 334.6 0.066 0.064 28.15 0.370 334.7 0.068 0.069 32_.67 0.370 334.8 0.069 0.074 37.42 0.370 339.9 0.071 0.080 42.37 0.370 335.0 0.073 0.085 47.53 0.370 335.0 0.075 0.091 52_.88 0.370 335.1 0.077 0.097 58.41 0.370 335.2 0.079 0.103 64.13 0.370 335.3 0.081 0.109 70.02 0.370 335.3 0.083 0.116 76.08 0.370 335.4 0.085 0.122 82.31 0.370 335.5 0.086 0.129 88.70 0.370 335.6 0.088 0.136 95.24 0.370 335.7 0.090 0.192 101.9 0.370 335.7 0.092 0.150 108.8 0.370 335.8 0.094 0.157 115.8 0.370 335.9 0.096 0.164 122.9 0.370 336.0 0.098 0.172 130.2 0.370 336.0 0.100 0.179 137.6 0.370 336.1 0.102 0.187 145.2 0.370 336.2 0.104 0.195 152.9 0.370 336.3 0.106 0.204 160.7 0.370 336.4 0.108 0.212 168.6 0.370 336.4 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.495482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.326601 5 year 0.397868 10 year 0.442081 25 year 0.995482 50 year 0.533853 100 year 0.571254 Flow Frequency Return Periods for Developed Mita.gated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.099867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed •1956 0.309 0.000 1957 0.498 0.078 1958 0.286 0.000 1959 0.334 0.000 1960 0.368 0.000 1961 0.245 0.000 1962 0.264 0.000 1963 0.532 0.040 1964 0.384 0.000 1965 0.361 0.000 1966 0.259 0.000 1967 0.311 0.000 1968 0.243 0.000 1969 0.241 0.000 1970 0.290 0.000 1971 0.298 0.000 1972 0.358 0.000 1973 0.282 0.000 1974 0.329 0.000 1975 0.285 0.000 1976 0.328 0.000 1977 0.415 0.000 1978 0.353 0.000 1979 0.420 0.000 1980 0.315 0.000 1981 0.360 0.000 1982 0.416 0.000 1983 0.446 0.020 1984 0.272 0.000 1985 0.314 0.000 1986 0.350 0.000 1987 0.377 0.000 1988 0.208 0.000 1989 0.249 0.000 1990 0.491 0.031 1991 0.500 0.029 1992 0.306 0.000 1993 0.229 0.000 1994 0.249 0.000 1995 0.361 0.000 1996 0.367 0.000 1997 0.295 0.000 1998 0.414 0.000 1999 0.355 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5001 0.0403 2 0.4979 0.0313 3 0.4913 0.0295 4 0.4457 0.0196 5 0.4199 0.0000 6 0.4163 0.0000 7 0.4152 0.0000 8 0.4138 0.0000 9 0.3849 0.0000 10 0.3772 0.0000 11 0.3675 0.0000 12 0.3666 0.0000 13 0.3613 0.0000 14 0.3611 0.0000 15 0.3604 0.0000 16 0.3583 0.0000 17 0.3554 0.0000 18 0.3527 0.0000 19 0.3504 0.0000 20 0.3339 0.0000 0.3289 0.0000 0.3284 0.0000 0.3149 0.0000 0.3145 0.0000 0.3111 0.0000 0.3090 0.0000 0.3063 0.0000 0.2984 0.0000 0.2953 0.0000 0.2860 0.0000 0.2899 0.0000 0.2824 0.0000 0.2720 0.0000 0.2637 0.0000 0.2540 0.0000 0.2494 0.0000 0.2499 0.0000 0.2451 0.0000 0.2435 0.0000 0.2405 0.0000 0.2401 0.0000 0.2244 0.0000 0.2084 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1633 1047 0 .0 Pass 0.1670 972 0 .0 Pass 0.1708 916 0 .0 Pass 0.1745 843 0 .0 Pass 0.1783 785 0 .0 Pass 0.1820 713 0 .0 Pass 0.1858 673 0 .0 Pass 0.1895 629 0 .0 Pass 0.1932 580 0 .0 Pass 0.1970 542 0 .0 Pass 0.2007 509 0 .0 Pass 0.2045 459 0 .0 Pass 0.2082 429 0 .0 Pass 0.2120 900 0 .0 Pass 0.2157 362 0 .0 Pass 0.2194 339 0 .0 Pass 0.2232 315 0 .0 Pass 0.2269 301 0 .0 Pass 0.2307 278 0 .0 Pass 0.2344 254 0 .0 Pass 0.2382 238 0 .0 Pass 0.2419 229 0 .0 Pass 0.2956 203 0 .0 Pass 0.2494 189 0 .0 Pass 0.2531 172 0 .0 Pass 0.2569 167 0 .0 Pass 0.2606 161 0 .0 Pass 0.2644 159 0 .0 Pass 0.2681 145 0 .0 Pass 0.2718 143 0 .0 Pass 0.2756 138 0 .0 Pass 0.2793 136 0 .0 Pass 0.2831 121 0 .0 Pass 0.2868 117 0 .0 Pass 0.2906 110 0 .0 Pass 0.2943 103 0 .0 Pass 0.2980 96 0 .0 Pass 0.3018 91 0 .0 Pass 0.3055 87 0 .0 Pass 0.3093 82 0 .0 Pass 0.3130 74 0 .0 Pass 0.3168 69 0 .0 Pass 0.3205 66 0 .0 Pass 0.3242 60 0 .0 Pass 0.3280 59 0 .0 Pass !J.3317 54 0 .0 Pass 0.3355 50 0 .0 Pass 0.3392 46 0 .0 Pass 0.3430 46 0 .0 Pass 0.3467 41 0 .0 Pass 0.3504 38 0 .0 Pass 0.3542 36 0 .0 Pass 0.3579 34 0 .0 Pass 0.3617 28 0 .0 Pass 0.3654 26 0 .0 Pass 0.3692 23 0 .0 Pass 0.3729 2_3 0 .0 Pass 0.3766 20 0 .0 Pass 0.3804 19 0 .0 Pass 0.3841 17 0 .0 Pass 0.3879 16 0 .0 Pass 0.3916 16 0 .0 Pass 0.3954 16 0 .0 Pass 0.3991 15 0 .0 Pass 0.4028 14 0 .0 Pass 0.9066 12 0 .0 Pass 0.4103 12 0 .0 Pass 0.4141 11 0 .0 Pass 0.4178 9 0 .0 Pass 0.4216 8 0 .0 Pass 0.4253 8 0 .0 Pass 0.9291 8 0 .0 Pass 0.4328 8 0 .0 Pass 0.4365 8 0 .0 Pass 0.4403 6 0 .0 Pass 0.4440 6 0 .0 Pass 0.4478 5 0 .0 Pass 0.4515 5 0 .0 Pass 0.9553 5 0 .0 Pass 0.4590 5 0 .0 Pass 0.4627 5 0 .0 Pass 0.9665 5 0 .0 Pass 0.4702 5 0 .0 Pass 0.9740 5 0 .0 Pass 0.4777 5 0 .0 Pass 0.9815 5 0 .0 Pass 0.4852 5 0 .0 Pass 0.4889 5 0 .0 Pass 0.4927 4 0 .0 Pass 0.4964 4 0 .0 Pass 0.5002 2 0 .0 Pass 0.5039 1 0 .0 Pass 0.5077 1 0 .0 Pass 0.5114 1 0 .0 Pass 0.5151 1 0 .0 Pass 0.5189 1 0 .0 Pass 0.5226 1 0 .0 Pass 0.5264 1 0 .0 Pass 0.5301 1 0 .0 Pass 0.5339 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.012 acre-feet On-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. Off-line facility target flow: 0.05 cfs. Adjusted for 15 min: 0.06 cfs. program and accompanying documentation as provided 'as-IS' without warranty of any kind. The entire risk regarding the performance and results of this program Is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology dlsclalms all warranties, either expressed or implied, Including but not limited to implied warrantees of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or Inability to use this program even If AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the posslblllty of such damages. 1Q0 ,xkY'rxkxkxxYk}C0~4's:S+2~".fiDWJOCt7hkxkkk .~., '~ 1.0 V «.~ {71 z~:,trxr+~ra~aooaaoa '- aaoaa~..~x~ o Predeveloped w 10E-t x Develope~c~t<irtigated t ~ ;~ 1aE.~ 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TF.,RR ` FLOW (ch) ~ ~~_.-_ ~ 0 o Predeveloped ~ 50 4201 ~ x Developed rub Facility 25 , 3895 0 35 •~ 10 3469 0 27 - 5 3117 ~ Q~ 2 2551 i. ~ .C C> N O 013 - - -._ - ,, ,, 10E•5 Perc a 10E•d 10E•3 10E~2 10E-1 1 10 ent Exceedin Yearly Peaks for developed W/O Pond Duration Graph r~ F~ow t~> 100 i 1138 ~ ~ 1 ~ i ~ 3 50 7 T01 ~ ~ i£; i ~ ~ ~ ~ it ~ i;s i t t 25 SD45 ;i ~ i i~l 1' I ~~ ~ ;i Ei ~ > ~ ~~ i: 3 _.. ~..~ -.... -_ _ - ' i 10 2 681 i ; ryry ., . , S ~ 51Q ~ ~ ; ' 2 54 ~ 59 _p 9' early Peaks for Developed W/Pond CLEARHIS BSN H1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN H1 0 07 7 83 BSN H1 0 12 7 83 BSN H1 0 20 7 83 BSN H1 0 24 7 83 BSN H1 0 26 7 83 BSN H1 0 27 7 83 yr Drainage Area: BSN H1 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.0727 ac 78 00 Impervious 0 2562 ac 98.00 Total 0 3289 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type' Description: Sheet Across Planter Strip Impervious TC Data: Flow type Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN H2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN H2 0 03 7 83 BSN H2 0 05 7 83 BSN H2 0 08 7 83 BSN H2 0 10 7 83 BSN H2 0 11 7 83 BSN H2 0 12 7 83 yr Drainage Area: BSN H2 Hyd Method• SBUH Hyd Peak Factor: 484 00 Storm Dur 24 00 hrs Area CN Pervious 0 0363 ac 78 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0236 0 33 SBUH/SCS TYPEIA 6 mo 0 0408 0 33 SBUH/SCS TYPE1A 2 yr 0 0660 0 33 SBUH/SCS TYPEIA 10 yr 0 0788 0 33 SBUH/SCS TYPEIA 25 yr 0 0853 0 33 SBUH/SCS TYPEIA 50 yr 0 0918 0 33 SBUH/SCS TYPE1A 100 Loss Method. SCS CN Number SCS Abs. 0.20 Intv. 10.00 min TC 0 03 hrs' 0 06 hrs 0.0727 ac 0.1437 ac 0 0212 ac 0.0913 ac Length• Slope: Coeff: Travel Time 6 00 ft 2.00% 0 2400 1 90 min Length. Slope Coeff: Travel Time 186.00 ft 0.54% 27.0000 1.56 min 18 50 ft 2.00% 0.0110 0.40 min 80 00 ft 0.50% 21 0000 0 90 min 500 ft 200% 00110 014 min 2000 ft 200% 00110 042 mm Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0100 0 14 SBUH/SCS TYPEIA 6 mo 0 0174 0 14 SBUH/SCS TYPEIA 2 yr 0 0283 0 14 SBUH/SCS TYPEIA 10 yr 0 0339 0 14 SBUH/SCS TYPEIA 25 yr 0 0367 0 14 SBUH/SCS TYPEIA 50 yr 0 0396 0 14 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs. 0 20 Intv. 10.00 min TC 0.03 hrs Impervious 0.1079 ac 98.00 0.06 hrs Total 0.1442 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0363 ac Impervious CN Data: ROADWAY 98.00 0.0712 ac DRIVEWAY 98 00 0 0367 ac Pervious TC Data: Flow type Description: Length: Slope• Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type• Description. Length: Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 184 00 ft 0.50% 27.0000 2.13 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 50 00 ft 0 50% 21 0000 0 56 mm Sheet Across Driveway 20 00 ft 2 00% 0.0110 0 42 min BSN H3 Event Summary: BasinlD Peak Q Peak T Peak Vol Are a Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN H3 0 06 7 83 0 0182 0 23 SBUH/SCS TYPEIA 6 mo BSN H3 0 10 7 83 0 0310 0 23 SBUH/SCS TYPEIA 2 yr BSN H3 0 15 7 83 0 0494 0 23 SBUH/SCS TYPEIA 10 yr BSN H3 0.18 7 83 0 0587 0 23 SBUHlSCS TYPEIA 25 yr BSN H3 0 20 7 83 0 0634 0 23 SBUH/SCS TYPE1A 50 yr BSN H3 0 21 7 83 0 0681 0 23 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN H3 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484.00 SCS Abs: 0.20 Storm Dur• 24.00 hrs Intv: 10 00 min Area CN TC Pervious 0.0324 ac 78 00 0 03 hrs Impervious 0.2009 ac 98.00 0.04 hrs Total 0.2333 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0324 ac Impervious CN Data: ROADWAY 98.00 0.0862 ac DRIVEWAY 98 00 0 1147 ac Pervious TC Data: Flow type: Description Length: Slope. Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0 2400 1.90 min Impervious TC Data: Flow type: Description. Length: Slope• Coeff: Travel Time Shallow Along Flow Lme of Gutter 125.00 ft 1 02% 27 0000 0.76 min Sheet Across Roadway 16 00 ft 2.00% 0.0110 0 35 min Channel Through Strom Water Pipe 80 00 ft 0 50% 21 0000 0.90 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0 14 min ADDHYD [BSN H1] AS [6 mo] [BSN H2] AS [6 mo] TO [BSN H1 +BSN H2) Peak Flow: 0 1006 cfs Peak Time: 7 83 hrs Hyd Vol 1463 86 cf - 0 0336 acft ADDHYD [BSN H1] AS [2 yr] [BSN H2] AS [2 yr] TO (BSN H1 +BSN H2] Peak Flow: 0 1723 cfs Peak Time: 7 83 hrs Hyd Vol• 2537.14 cf - 0 0582 acft ADDHYD [BSN H1] AS [10 yr] [BSN H2] AS [10 yr] TO [BSN H1 +BSN H2] Peak Flow• 0 2807 cfs Peak Time• 7 83 hrs Hyd Vol 4106 23 cf - 0 0943 acft ADDHYD [BSN H1] AS [25 yr] [BSN H2] AS [25 yr] TO [BSN H1 +BSN H2] Peak Flow• 0 3363 cfs Peak Time. 7 83 hrs Hyd Vol 4910.93 cf - 0 1127 acft ADDHYD [BSN H1] AS [50 yr) [BSN H2) AS [50 yr] TO [BSN H1 +BSN H2) Peak Flow• 0 3644 cfs Peak Time 7 83 hrs Hyd Vol. 5316.54 cf - 0 1221 acft ADDHYD [BSN H1] AS [100 yr] [BSN H2] AS [100 yr] TO [BSN H1 +BSN H2] Peak Flow. 0 3927 cfs Peak Time. 7 83 hrs Hyd Vol 5724.05 cf - 0 1314 acft ADDHYD [BSN H1 +BSN H2] AS [6 mo] [BSN H3] AS [6 mo] TO (BSN H1 +BSN H2 +BSN H3] Peak Flow. 0.1606 cfs Peak Time: 7.83 hrs Hyd Vol: 2256 41 cf - 0.0518 acft ADDHYD [BSN H1 +BSN H2] AS [2 yr] [BSN H3] AS [2 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow: 0.2723 cfs Peak Time: 7.83 hrs Hyd Vol: 3885 55 cf - 0 0892 acft ADDHYD [BSN H1 +BSN H2] AS [10 yr] [BSN H3] AS [10 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow• 0.4307 cfs Peak Time: 7 83 hrs Hyd Vol. 6259 57 cf - 0.1437 acft ADDHYD [BSN H1 +BSN H2] AS [25 yr] [BSN H3] AS [25 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow: 0 5163 cfs Peak Time: 7.83 hrs Hyd Vol: 7466.18 cf - 0.1714 acft ADDHYD [BSN H1 +BSN H2] AS [50 yr] [BSN H3] AS [50 yr] TO [BSN H1 +BSN H2 +BSN H3] Peak Flow. 0.5644 cfs Peak Time 7 83 hrs Hyd Vol. 8080 38 cf - 0.1855 acft ADDHYD [BSN H1 +BSN H2] AS [100 yr] [BSN H3] AS [100 yr] TO [BSN H1 +BSN H2 + BSN H3] Peak Flow• 0 6031 cfs Peak Time: 7 83 hrs Hyd Vol 8692.48 cf - 0.1996 acft Hydrograph ID: BASIN H Area• 0.7064 ac Hyd Int. 10 00 min Base Flow. Peak Flow: 0.6031 cfs Peak Time: 7 83 hrs Hyd Vol 0 1996 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0023 8 67 0 2299 16 33 0 0807 0 83 0 0083 8 83 0 2001 16 50 0 0807 1 00 0 0146 9 00 0 2085 16 67 0 0808 1.17 0 0219 9 17 0 1734 16 83 0 0808 1 33 0 0285 9 33 0 1510 17 00 0 0808 1 50 0 0326 9 50 0 1575 17 17 0 0774 1 67 0 0381 9 67 0 1457 17 33 0 0750 1 83 0 0426 9 83 0 1396 17 50 0 0757 2.00 0 0452 10 00 0 1415 17 67 0 0755 2 17 0 0498 10 17 0 1311 17 83 0 0756 2 33 0 0535 10 33 0 1243 18 00 0 0756 2 50 0 0551 10 50 0 1264 18 17 0 0722 2 67 0 0569 10 67 0 1192 18 33 0 0698 2 83 0 0583 10 83 0 1148 18 50 0 0705 3 00 0 0596 11 00 0 1161 18 67 0 0703 3 17 0 0607 11 17 0 1125 18 83 0 0704 3 33 0 0617 11 33 0 1103 19 00 0 0704 3 50 0 0626 11 50 0 1110 19 17 0 0669 3 67 0 0659 11 67 0 1076 19 33 0 0645 3 83 0.0684 11 83 0 1053 19 50 0 0652 4 00 0 0687 12.00 0.1061 19 67 0 0650 4 17 0 0746 12 17 0 1025 19 83 0 0651 4 33 0 0790 12 33 0 1003 20 00 0 0651 4 50 0 0787 12 50 0 1010 20 17 0 0651 4 67 0 0848 12 67 0 0975 20 33 0 0651 4.83 0 0892 12 83 0 0952 20 50 0 0651 5 00 0 0894 13 00 0 0959 20 67 0 0651 5 17 0 0960 13 17 0 0958 20 83 0 0652 5 33 0 1009 13 33 0 0959 21 00 0 0652 5 50 0.1009 13 50 0 0959 21 17 0 0652 5 67 0 1077 13 67 0 0926 21 33 0 0652 5 83 0 1127 13 83 0 0902 21 50 0 0652 6 00 0 1126 14 00 0 0910 21 67 0 0652 6 17 0 1254 14 17 0 0908 21 83 0 0653 6 33 0 1347 14 33 0 0909 22 00 0 0653 6 50 0 1336 14 50 0 0909 22 17 0 0618 6 67 0 1530 14 67 0 0876 22 33 0 0593 6 83 0 1669 14 83 0 0852 22 50 0 0600 7 00 0 1648 15 00 0 0859 22 67 0 0598 7 17 0.1883 15 17 0 0857 22 83 0 0599 7.33 0 2047 15 33 0 0859 23 00 0 0599 7 50 0 2022 15 50 0 0859 23 17 0 0599 7 67 0 4338 15 67 0 0825 23 33 0 0599 7 83 0 6031 15 83 0 0801 23 50 0 0600 8 00 0 5678 16 00 0 0808 23 67 0 0600 8 17 0 3913 16 17 0 0806 23 83 0 0600 8 33 0 2504 16 33 0 0807 24 00 0 0600 8 50 0 2908 16 50 0 0807 24 17 0 0213 Hydrograph ID: BASIN H Area: 0.7064 ac Hyd Int: 10 00 min Base Flow: Peak Flow• 0.6031 cfs Peak Time: 7 83 hrs Hyd Vol• 0 1996 acft MOVEHYD [BASIN H] TO [BASIN H - 6 mo] AS [6 mo] Peak Flow: 0 1606 cfs Peak Time: 7.83 hrs Hyd Vol 2256 41 cf - 0 0518 acft MOVEHYD [BASIN H] TO [BASIN H - 100 yr] AS [100 yr] Peak Flow: 0.6031 cfs Peak Time: 7 83 hrs Hyd Vol 8692 48 cf - 0.1996 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp: Multiple Orifice Start EI Max EI Increment 328.0000 ft 333 9000 ft 0.10 Infil: 10 00 in/hr Multiplier. 1.00 Reach ID: BIOSWALE H Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 160.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh~1v Up Node Dn Node Up Invert DUMMY H 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0.5000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 10 0000 in/hr NO NO Conduit Summary: Trib Area Flow Capacity 0.0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh 1v Dn Invert 0.0000 ft Min Slope Max Slope Min drop 0.5000 ft 1 0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0.0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN H - 6 MO] THRU [BIOSWALE H] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE H 0 7064 0 1606 ---- 1 00 0 0575 Ditch 0 4679 ----- BASIN H ROUTEHYD [BASIN H - 100 YR] THRU [BIOSWALE H] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE H 0 7064 0 6031 ---- 1 00 0 1246 Ditch 0 7094 ----- BASIN H Node ID: INFILTRATION H Desc: Manhole structure Start EI: 333 9000 ft Max EI~ 334.9000 ft Contnb Basin Contnb Hyd Length Width Void Ratio 160 0000 ft 10 0000 ft 39 00 Node ID: BASIN H RPL Desc: Manhole structure Start EI 333.9000 ft Max EI 334 9000 ft Contrib Basin Contrib Hyd Storage Id: INFILTRATION H Discharge Id. INFILTRATION RLPCOMPUTE [BASIN H RPL] SUMMARY 100 YR Match Q: 0 6031 cfs Peak Out Q 0.1992 cfs -Peak Stg. 334.84 ft -Active Vol. 1153.29 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -G Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin G Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 DEVELOPED LAND USE Basan Basin G Flows To Bio-Infiltration Swale G Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.69 IMPERVIOUS: 2.07 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale G Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. nimancinnc Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.02_1 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infa.lt(cfs) 332.5 0.037 0.000 0.000 0.000 332.6 0.039 0.003 0.000 0.370 332.7 0.040 0.006 0.000 0.370 332.7 0.092 0.009 0.000 0.370 332.8 0.044 0.013 0.000 0.370 ~_ ~,-- ,~ <E~; ~J ;~gEPH Dq,~~ ~cp WASy~ ~O ~ 1~T 4. q n °. n `p`~ }.155 ^~' ~'" RFC/S'I F.Rt,, C`C' ,~ EXP1 ~~ t 332.9 0.046 0.016 0.000 0.370 333.0 0.047 0.020 0.000 0.370 333.0 0.049 0.023 0.411 0.370 333.1 0.051 0.027 1.873 0.370 333.2 0.053 0.031 3.920 0.370 333.3 0.055 0.036 6.416 0.370 333.4 0.057 0.040 9.292 0.370 333.4 0.058 0.044 12.50 0.370 333.5 0.060 0.049 16.01 0.370 333.6 0.062 0.054 19.81 0.3"10 333.7 0.064 0.059 23.86 0.370 333.7 0.066 0.064 28.15 0.370 333.8 0.068 0.069 32.67 0.370 333.9 0.069 0.074 37.42_ 0.370 334.0 0.071 0.080 42.37 0.370 334.1 0.073 0.085 47.53 0.370 334.1 0.075 0.091 52.88 0.370 334.2 0.077 0.097 58.41 0.370 334.3 0.079 0.103 69.13 0.370 334.4 0.081 0.109 70.02 0.370 339.4 0.083 0.116 76.08 0.370 334.5 0.085 0.122 82.31 0.370 334.6 0.086 0.129 88.70 0.370 334.7 0.088 0.136 95.24 0.370 334.8 0.090 0.142 101.9 0.370 334.8 0.092 0.150 108.8 0.370 334.9 0.094 0.157 115.8 0.370 335.0 0.096 0.164 122.9 0.370 335.1 0.098 0.172 130.2 0.370 335.1 0.100 0.179 137.6 0.370 335.2 0.102 0.187 195.2 0.370 335.3 0.104 0.195 152.9 0.370 335.4 0.106 0.204 160.7 0.370 335.5 0.108 0.212 168.6 0.370 335.5 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(efs) 2 year 0.519477 5 year 0.632449 10 year 0.702504 25 year 0.787089 50 year 0.847899 100 year 0.907062 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.519977 5 year 0.632449 10 year 0.702504 25 year 0.787089 50 year 0.847899 100 year 0.907062 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.990 0.062 1957 0.792 0.441 1958 0.455 0.000 1959 0.532 0.005 1960 0.585 0.178 1961 0.389 0.000 1962 0.420 0.000 1963 0.843 0.274 1964 0.612 0.181 1965 0.579 0.222 1966 0.404 0.000 1967 0.493 0.056 1968 0.387 0.000 1969 0.383 0.000 1970 0.382 0.000 1971 0.475 0.022 1972 0.566 0.194 1973 0.450 0.000 1974 0.524 0.122 1975 0.454 0.016 1976 0.522 0.059 1977 0.661 0.155 1978 0.562 0.113 1979 0.669 0.086 1980 0.501 0.000 1981 0.573 0.187 1982 0.663 0.182 1983 0.710 0.277 1984 0.433 0.000 1985 0.501 0.000 1986 0.557 0.161 1987 0.597 0.240 1988 0.332 0.000 1989 0.397 0.000 1990 0.782 0.413 1991 0.789 0.411 1992 0.488 0.033 1993 0.357 0.000 1994 0.397 0.000 1995 0.575 0.220 1996 0.584 0.199 1997 0.470 0.053 1998 0.659 0.170 1999 0.566 0.168 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7921 0.4131 2 0.7895 0.4111 3 0.7816 0.2767 4 0.7096 0.2744 5 0.6685 0.2400 6 0.6629 0.2222 7 0.6611 0.2200 8 0.6588 0.1993 9 0.6121 0.1992 10 0.5968 0.1868 11 0.5852 0.1822 12 0.5837 0.1813 13 0.5751 0.1781 14 0.5742 0.1700 15 0.5735 0.1677 16 0.5659 0.1608 17 0.5657 0.1550 18 0.5616 0.1216 19 0.5570 0.1135 20 0.5317 0.0861 21 0.5236 0.0616 22 0.5224 0.0587 23 0.5014 0.0563 29 0.5007 0.0532 25 0.9933 0.0332 26 0.4899 0.02?_9 27 0.4877 0.0161 28 0.4750 0.0054 29 0.4703 0.0000 30 0.4551 0.0000 31 0.4536 0.0000 32 0.4497 0.0000 33 0.4328 0.0000 34 0.4200 0.0000 35 0.4044 0.0000 36 0.3971 0.0000 37 0.3970 0.0000 38 0.3894 0.0000 39 0.3875 0.0000 40 0.3829 0.0000 41 0.3824 0.0000 42 0.3573 0.0000 43 0.3318 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2597 1051 1] 1.0 Pass 0.2657 981 9 .0 Pass 0.2716 913 8 .0 Pass 0.2776 842 5 .0 Pass 0.2835 788 5 .0 Pass 0.2894 719 5 .0 Pass 0.2954 669 5 .0 Pass 0.3013 624 5 .0 Pass 0.3073 583 5 .0 Pass 0.3132 535 5 .0 Pass 0.3191 498 5 1.0 Pass 0.3251 456 5 1.0 Pass 0.3310 428 5 1.0 Pass 0.3370 399 5 1.0 Pass 0.3429 365 5 1.0 Pass 0.3488 340 5 1.0 Pass 0.3548 315 4 1.0 Pass 0.3607 297 4 1.0 Pass 0.3667 278 9 1.0 Pass 0.3726 255 9 1.0 Pass 0.3785 241 4 1.0 Pass 0.3845 223 4 1.0 Pass 0.3904 202_ 9 1.0 Pass 0.3969 190 4 2.0 Pass 0.4023 174 4 2.0 Pass 0.4083 167 3 1.0 Pass 0.9192 161 1 .0 Pass 0.4201 154 1 .0 Pass 0.4261 147 1 .0 Pass 0.4320 142 1 .0 Pass 0.4380 138 1 .0 Pass 0.4939 137 0 .0 Pass 0.4498 124 0 .0 Pass 0.4558 117 0 .0 Pass 0.4617 108 0 .0 Pass 0.9677 104 0 .0 Pass 0.4736 97 0 .0 Pass 0.4795 91 0 .0 Pass 0.4855 87 0 .0 Pass 0.4914 82 0 .0 Pass 0.4974 74 0 .0 Pass 0.5033 67 0 .0 Pass 0.5092 66 0 .0 Pass 0.5152 60 0 .0 Pass 0.5211 58 0 .0 Pass 0.5271 54 0 .0 Pass 0.5330 50 0 .0 Pass 0.5389 46 0 .0 Pass 0.5449 46 0 .0 Pass 0.5508 41 0 .0 Fass 0.5568 38 0 .0 Pass 0.5627 36 0 .0 Pass 0.5686 34 0 .0 Pass 0.5746 29 0 .0 Pass 0.5805 26 0 .0 Pass 0.5865 23 0 .0 Pass 0.5924 23 0 .0 Pass 0.5983 19 0 .0 Pass 0.6043 19 0 .0 Pass 0.6102 18 0 .0 Pass 0.6162 16 0 .0 Pass 0.6221 16 0 .0 Pass 0.6281 16 0 .0 Pass 0.6340 15 0 .0 Pass 0.6399 14 0 .0 Pass 0.6459 12 0 .0 Pass 0.6518 12 0 .0 Pass 0.6578 12 0 .0 Pass 0.6637 9 0 .0 Pass 0.6696 8 0 .0 Pass 0.6756 8 0 .0 Pass 0.6815 8 0 .0 Pass 0.6875 8 0 .0 Pass 0.6934 7 0 .0 Pass 0.6993 6 0 .0 Pass 0.7053 6 0 .0 Pass 0.7112 5 0 .0 Pass 0.7172 5 0 .0 Pass 0.7231 5 0 .0 Pass 0.7290 5 0 .0 Pass 0.7350 5 0 .0 Pass 0.7409 5 0 .0 Pass 0.7469 5 0 .0 Pass 0.7528 5 0 .0 Pass 0.7587 5 0 .0 Pass 0.7697 5 0 .0 Pass 0.7706 5 0 .0 Pass 0.7766 5 0 .0 Pass 0.7825 4 0 .0 Pass 0.7884 4 0 .0 Pass 0.7944 1 0 .0 Pass 0.8003 1 0 .0 Pass 0.8063 1 0 .0 Pass 0.8122 1 0 .0 Pass 0.8181 1 0 .0 Pass 0.8241 1 0 .0 Pass 0.8300 1 0 .0 Pass 0.8360 1 0 .0 Pass 0.8419 1 0 .0 Pass 0.8478 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.138 acre-feet On-line Facility target flow: 0.9 cfs. Adjusted for 15 min: 0.96 cfs. Off-line facility target flow: 0.2 cfs. Adjusted for 15 min: 0.22 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanyrny documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (tncluding wrthout limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possrbility of such damages 90.0 ~xkrt,xxx:~~rra~+wo{,,oosk~k~xkx w 1.0 U ..... Q1 ~ccr.,c~~6~jp°°Oa ~ p~o~oodooc~scxxxa~~+carx o PrEdeveloped ~ toE-9 x Developec~Witigated r» x d 10E2 1 10 IO 30 d0 30 60 70 60 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart ~ o Predeveloped 4 a x Developed w~h faaldy 035 _e a .a ~ u ._ .... ~^y 027 _. _ - ~ ~ __. . _ m_ V "' 0 20 - d m ~ 013 ~ ______ ____ s c~ L1 10E~5 ~ 10E-d 10E 3 10E 2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TSAR F104q (tfs) 100 1138 .!° ' 333 < } 3 ~ ' 50 7 ~~~ ' i ~ ~ > ~ 3i _ '~[. ~{ ~, 25 5045 ~ , ~ ' ` ; a 3 ~; ,t', ° ~ ~ 3 3 ~ J ~ ..~... ~... _._._ . -. ~ , ; p ~ , ; 10 2 881 :.~.~ ,1 ~ , 4 . 3 5 1r51p$ l ~~ _~ ~ '~ ~ 5459 £ ~ ~~ 3 i " early Peaks for Developed W/Pond CLEARHIS BSN G1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G1 0 08 7 83 BSN G1 0 13 7 83 BSN G1 0 22 7 83 BSN G1 0 26 7 83 BSN G1 0 28 7 83 BSN G1 0 30 7 83 yr Drainage Area: BSN G1 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur 24 00 hrs Area CN Pervious 0.0841 ac 78 00 Impervious 0.2862 ac 98.00 Total 0.3703 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type Description. Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Driveway BSN G2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G2 0 04 7 83 BSN G2 0 07 7 83 BSN G2 0 11 7 83 BSN G2 0 13 7 83 BSN G2 0 14 7 83 BSN G2 0 15 7 83 yr Drainage Area: BSN G2 Hyd Method SBUH Hyd Peak Factor 484 00 Storm Dur• 24.00 hrs Area CN Pervious 0 0320 ac 78.00 Impervious 0.1423 ac 98.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0264 0 37 SBUH/SCS TYPE1A 6 mo 0 0457 0 37 SBUH/SCS TYPEIA 2 yr 0 0739 0 37 SBUH/SCS TYPE1A 10 yr 0 0884 0 37 SBUH/SCS TYPEIA 25 yr 0 0957 0 37 SBUH/SCS TYPEIA 50 yr 0 1030 0 37 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs: 0 20 Intv: 10 00 min TC 0.03 hrs 0 07 hrs 0 0841 ac 0 1714 ac 01148 ac Length: Slope: Coeff: Travel Time 6 00 ft 2 00% 0 2400 1 90 min Length Slope: Coeff• Travel Time 444 00 ft 1 77% 27 0000 2 06 min 1850 ft 200% 00110 040 min 100 00 ft 0.50% 21 0000 1 12 min 20 00 ft 2 00% 0 0110 0 42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0130 0 17 SBUH/SCS TYPE1A 6 mo 0 0223 0 17 SBUHlSCS TYPEIA 2 yr 0 0358 0 17 SBUH/SCS TYPEIA 10 yr 0 0427 0 17 SBUH/SCS TYPEIA 25 yr 0 0462 0 17 SBUH/SCS TYPE1A 50 yr 0 0497 0 17 SBUH/SCS TYPEIA 100 Loss Method. SCS CN Number SCS Abs• 0 20 Intv: 10.00 min TC 0.03 hrs 0.06 hrs Total 0.1743 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0320 ac Impervious CN Data: ROADWAY 98.00 0.0849 ac DRIVEWAY 98.00 0 0574 ac Pervious TC Data: Flow type: Description Length: Slope Coeff' Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type: Description: Length: Slope Coeff: Travel Time Shallow Along Flow Lme of Gutter 198 00 ft 0.50% 27 0000 2.30 min Sheet Across Roadway 18 50 ft 2.00% 0 0110 0 40 mm Channel Through Strom Water Pipe 50 00 ft 0.50% 21 0000 0 56 min Sheet Across Driveway 20 00 ft 2.00% 0 0110 0 42 min BSN G3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN G3 0 07 7 83 0 0220 0 28 SBUH/SCS TYPE1A 6 mo BSN G3 0 11 7 83 0 0373 0 28 SBUH/SCS TYPEIA 2 yr BSN G3 0 18 7 83 0 0592 0 28 SBUH/SCS TYPEIA 10 yr BSN G3 0 21 7 83 0 0703 0 28 SBUH/SCS TYPE1A 25 yr BSN G3 0 23 7 83 0 0759 0 28 SBUH/SCS TYPEIA 50 yr BSN G3 0 25 7 83 0 0815 0 28 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN G3 Hyd Method SBUH Hyd Loss Method SC S CN Number Peak Factor 484 00 SCS Abs 0 2 0 Storm Dur: 24.00 hrs Intv 10 00 min Area CN TC Pervious 0.0318 ac 78 00 0 03 hrs Impervious 0.2437 ac 98 00 0 05 hrs Total 0 2755 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0 0318 ac Impervious CN Data: ROADWAY 98 00 0 1629 ac DRIVEWAY 98.00 0 0574 ac SIDEWALK 98 00 0.0234 ac Pervious TC Data: Flow type Description: Length Slope Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0 2400 1 90 min Impervious TC Data: Flow type: Description Length Slope: Coeff. Travel Time Shallow Along Flow Line of Gutter 194 00 ft 0 54% 27 0000 1 63 min Sheet Across Roadway 18.50 ft 2 00% 0 0110 0.40 min Channel Through Strom Water Pipe 100 00 ft 0.50% 21 0000 1.12 min Sheet Across Sidewalks 5.00 ft 2 00% 0.0110 0 14 min BSN G4 Event Summary: BasinlD Peak O Event ------- (cfs) BSN G4 0 06 BSN G4 0 10 BSN G4 0 16 BSN G4 0 19 BSN G4 0 21 BSN G4 0 22 yr Drainage Area: BSN G4 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0194 0.25 SBUH/SCS TYPEIA 6 mo 7 83 0 0331 0 25 SBUH/SCS TYPE1A 2 yr 7 83 0 0528 0 25 SBUH/SCS TYPEIA 10 yr 7.83 0 0628 0 25 SBUHISCS TYPE1A 25 yr 7 83 0 0678 0 25 SBUH/SCS TYPE1A 50 yr 7 83 0 0729 0 25 SBUHISCS TYPEIA 100 Area CN Pervious 0.0377 ac 78.00 Impervious 0 2134 ac 98.00 Total 0.2511 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method SCS CN Number SCS Abs 0 20 Intv 10 00 min TC 0 03 hrs 0 04 hrs 0.0377 ac 0.1441 ac 0 0234 ac 0 0459 ac Length: Slope: Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length Slope: Coeff: Travel Time 173 00 ft 2 28% 27.0000 0.71 min 18.50 ft 2 00% 0.0110 0 40 min 100 00 ft 0.50% 21.0000 1.12 min 5.00 ft 2.00% 0 0110 0.14 min ADDHYD [BSN G1] AS [6 mo] [BSN G2] AS [6 mo] TO [BSN G1 +BSN G2] Peak Flow 0 1169 cfs Peak Time: 7.83 hrs Hyd Vol: 1716 22 cf - 0 0394 acft ADDHYD [BSN G1] AS [2 yr] [BSN G2] AS [2 yr] TO [BSN G1 +BSN G2] Peak Flow: 0 1997 cfs Peak Time: 7 83 hrs Hyd Vol: 2964 38 cf - 0 0681 acft ADDHYD [BSN G1] AS [10 yr] [BSN G2] AS [10 yr] TO [BSN G1 +BSN G2] Peak Flow 0.3240 cfs Peak Time. 7.83 hrs Hyd Vol. 4782.34 cf - 0.1098 acft ADDHYD [BSN G1] AS [25 yr] [BSN G2] AS (25 yr] TO [BSN G1 +BSN G2] Peak Flow: 0 3876 cfs Peak Time 7.83 hrs Hyd Vol 5713 03 cf - 0 1312 acft ADDHYD [BSN G1] AS [50 yr] [BSN G2] AS [50 yr] TO [BSN G1 +BSN G2] Peak Flow: 0 4197 cfs Peak Time. 7 83 hrs Hyd Vol. 6181 85 cf - 0 1419 acft ADDHYD [BSN G1] AS [100 yr] [BSN G2] AS [100 yr] TO [BSN G1 +BSN G2] Peak Flow 0.4520 cfs Peak Time. 7.83 hrs Hyd Vol. 6652.71 cf - 0 1527 acft ADDHYD [BSN G3] AS [6 mo] [BSN G4] AS [6 mo] TO [BSN G3 +BSN G4] Peak Flow: 0.1281 cfs Peak Time. 7 83 hrs Hyd Vol• 1802.40 cf - 0 0414 acft ADDHYD [BSN G3] AS [2 yr] [BSN G4] AS [2 yr] TO [BSN G3 +BSN G4] Peak Flow: 0.2159 cfs Peak Time 7.83 hrs Hyd Vol. 3066 86 cf - 0.0704 acft ADDHYD [BSN G3] AS [10 yr] [BSN G4] AS [10 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 3427 cfs Peak Time 7 83 hrs Hyd Vol 4879.12 cf - 0.1120 acft ADDHYD (BSN G3] AS [25 yr] [BSN G4] AS [25 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 4067 cfs Peak Time. 7 83 hrs Hyd Vol 5799.30 cf - 0.1331 acft ADDHYD (BSN G3] AS [50 yr] [BSN G4] AS [50 yr] TO [BSN G3 +BSN G4] Peak Flow. 0.4389 cfs Peak Time 7 83 hrs Hyd Vol 6261.49 cf - 0 1437 acft ADDHYD [BSN G3] AS [100 yr] [BSN G4] AS [100 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 4711 cfs Peak Time• 7.83 hrs Hyd Vol• 6724.85 cf - 0.1544 acft ADDHYD [BSN G1 +BSN G2] AS [6 mo] [BSN G3 +BSN G4] AS [6 mo] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4) Peak Flow: 0 2450 cfs Peak Time 7.83 hrs Hyd Vol 3518.62 cf - 0.0808 acft ADDHYD (BSN G1 +BSN G2] AS [2 yr] [BSN G3 +BSN G4] AS [2 yr] TO (BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 4156 cfs Peak Time• 7 83 hrs Hyd Vol 6031 24 cf - 0 1802 acft ADDHYD (BSN G1 +BSN G2] AS [10 yr] [BSN G3 +BSN G4] AS [10 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow. 0.6667 cfs Peak Time: 7 83 hrs Hyd Vol• 9661.46 cf - 0.2218 acft ADDHYD [BSN G1 +BSN G2] AS [25 yr] [BSN G3 +BSN G4] AS [25 yr] TO (BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0.7943 cfs Peak Time• 7.83 hrs Hyd Vol: 11512.33 cf - 0.2749 acft ADDHYD [BSN G1 +BSN G2] AS [50 yr] [BSN G3 +BSN G4] AS (50 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 8586 cfs Peak Time: 7.83 hrs Hyd Vol: 12443 34 cf - 0.2856 acft ADDHYD [BSN G1 +BSN G2] AS [100 yr] [BSN G3 +BSN G4] AS [100 yr] TO [BSN G1 + BSN G2 +BSN G3 +BSN G4] Peak Flow• 0 9231 cfs Peak Time• 7.83 hrs Hyd Vol• 13377 56 cf - 0.3071 acft Hydrograph ID: BASIN G Area 1.0712 ac Hyd Int. 10.00 min Base Flow: Peak Flow. 0.9231 cfs Peak Time 7.83 hrs Hyd Vol: 0.3071 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 3581 16 33 0 1233 0 83 0 0126 8 83 0 3082 16 50 0 1233 1 00 0 0225 9 00 0 3195 16 67 0 1234 1 17 0 0338 9 17 0 2685 16 83 0 1234 1 33 0 0443 9 33 0 2327 17 00 0 1235 1 50 0 0509 9 50 0 2410 17 17 0 1184 1 67 0 0593 9 67 0 2244 17 33 0 1146 1 83 0 0665 9 83 0 2143 17 50 0 1155 2 00 0 0707 10 00 0 2168 17 67 0 1153 2 17 0 0777 10.17 0 2017 17 83 0 1155 2 33 0 0836 10 33 0 1909 18 00 0 1155 2 50 0 0863 10 50 0 1935 18 17 0 1104 2 67 0 0891 10 67 0.1831 18 33 0 1066 2 83 0 0914 10 83 0 1760 18 50 0 1075 3 00 0 0934 11 00 0.1778 18 67 0 1073 3 17 0 0951 11 17 0 1725 18 83 0 1074 3 33 0 0967 11 33 0 1690 19 00 0 1074 3 50 0 0980 11.50 0 1700 19 17 0 1023 3.67 0 1030 11 67 0 1649 19 33 0 0985 3 83 0.1072 11 83 0 1613 19 50 0 0994 4 00 0 1077 12 00 0 1623 19 67 0 0992 4 17 0 1165 12 17 0 1572 19 83 0 0993 4 33 0 1236 12 33 0 1536 20 00 0 0993 4 50 0 1233 12 50 0 1545 20 17 0 0993 4 67 0 1324 12 67 0 1494 20 33 0 0994 4 83 0 1396 12 83 0 1458 20 50 0 0994 5 00 0 1400 13 00 0 1467 20 67 0 0994 5 17 0 1498 13 17 0 1465 20 83 0 0994 5 33 0 1575 13 33 0 1467 21 00 0 0994 5 50 0 1577 13 50 0 1468 21.17 0 0995 5.67 0.1677 13 67 0 1418 21 33 0 0995 5 83 0 1755 13 83 0 1381 21 50 0 0995 6 00 0 1755 14 00 0 1390 21 67 0 0995 6 17 0 1943 14 17 0 1388 21 83 0 0996 6 33 0 2091 14 33 0 1390 22 00 0 0996 6 50 0 2079 14 50 0 1390 22 17 0 0945 6 67 0 2364 14 67 0.1341 22 33 0 0906 6 83 0 2584 14 83 0 1303 22 50 0 0915 7 00 0 2560 15 00 0 1312 22 67 0 0913 7 17 0 2903 15 17 0 1311 22 83 0 0914 7 33 0 3163 15 33 0 1312 23 00 0 0914 7 50 0 3133 15 50 0 1312 23 17 0 0914 7 67 0 6550 15 67 0 1262 23 33 0 0914 7 83 0 9231 15.83 0 1225 23 50 0 0915 8 00 0 8788 16 00 0 1234 23 67 0 0915 8 17 0 6131 16 17 0 1232 23 83 0 0915 8 33 0 3922 16 33 0 1233 24 00 0 0915 8 50 0 4432 16 50 0 1233 24 17 0.0348 Hydrograph ID: BASIN G Area: 1.0712 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 0 9231 cfs Peak Time 7 83 hrs Hyd Vol. 0 3071 acft MOVEHYD (BASIN G] TO [BASIN G - 6 mo] AS [6 mo] Peak Flow: 0.2450 cfs Peak Time 7 83 hrs Hyd Vol 3518.62 cf - 0.0808 acft MOVEHYD [BASIN G] TO [BASIN G - 100 yr] AS [100 yr] Peak Flow: 0.9231 cfs Peak Time 7 83 hrs Hyd Vol: 13377 56 cf - 0.3071 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Onf~ces Start EI Max EI Increment 327.0000 ft 333 0000 ft 0.10 Infil: 10 00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE G Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -normal Routing Method Travel Time Translation Hyd params By 0 0250 Mannings Formula Length Slope Entrance Loss 160 0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3 0000 ft 2.OOh:1 v 2.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY G 0 0000 ft 0.0000 ft Conduit Constraints: Mm Vel Max Vel Min Cov Mln Slope Max Slope Mln drop 0.5000 ft 1 0000 ft 3 0000 ft 0 5000 ft 1 0000 ft 0 0000 ft In/Exfd Hold Up Hold Dn Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Trlb Area Flow Capacity Velocity Normal Depth 0 0000 ac 0 0000 cf 0 0000 cf 0 0000 ft/s 0 0000 ft Ent Loss Exlt Loss Fnct Loss Start TW 0.000000 ft 0 000000 ft 0 000000 ft 0 0000 ft ROUTEHYD [BASIN G - 6 MO] THRU [BIOSWALE G] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE G 1 0712 0 2450 ---- 1 00 0 0673 Ditch 0 5603 ----- BASIN G ROUTEHYD [BASIN G - 100 YR] THRU [BIOSWALE G] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE G 1 0712 0 9231 ---- 1 00 0 1455 Ditch 0 7811 ----- BASIN G Node ID: INFILTRATION G Desc Manhole structure Start EI: 333.0000 ft Max EI: 334.0000 ft Contrib Basin. Contrib Hyd• Length Width Void Ratio 160 0000 ft 10 0000 ft 39 00 Node ID: BASIN G RPL Desc• Manhole structure Start EI 333.0000 ft Max EI: 334 0000 ft Contrib Basin Contrib Hyd• Storage Id• INFILTRATION G Discharge Id• INFILTRATION RLPCOMPUTE [BASIN G RPL] SUMMARY 100 YR MatchO=PeakQ= 0 9231 cfs Peak Out O: 0 3141 cfs -Peak Stg• 333 90 ft - Active Vol 1314.99 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -G Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin G Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 DEVELOPED LAND USE Basin Basin G Flows To Bio-Infiltration Swale G Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale G Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 160f_t. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.5 0.037 0.000 0.000 0.000 332.6 0.039 0.003 0.000 0.370 332.7 0.040 0.006 0.000 0.370 332.7 0.042 0.009 0.000 0.370 332_.8 0.049 0.013 0.000 0.370 r~ ~. C~PJ ~~ a- ~ < }' v~ ~gEPH Dq~~ ~~oF wasy~(c~OQ ~P p ." q ~ A ~. Ca ~rs~rKt~ .~~ ~ L~'~ 4 ~~~~ 0~-zZ--05 EXPIRES• I1-22- --'~}} .r...,........,...l,~,.-t 332.9 0.046 0.016 0.000 0.370 333.0 0.097 0.020 0.000 0.370 333.0 0.049 0.023 0.411 0.370 333.1 0.051 0.027 1.873 0.370 333.2 0.053 0.031 3.920 0.370 333.3 0.055 0.036 6.416 0.370 333.9 0.057 0.040 9.292 0.370 333.4 0.058 0.044 12.50 0.370 333.5 0.060 0.049 16.01 0.370 333.6 0.062 0.054 19.81 0.370 333.7 0.064 0.059 23.86 0.370 333.7 0.066 0.064 28.15 0.370 333.8 0.068 0.069 32..67 0.370 333.9 0.069 0.074 31.42 0.370 339.0 0.071 0.080 42.37 0.37() 339.1 0.073 0.085 47.53 0.370 334.1 0.075 0.091 52.88 0.370 334.2 0.077 0.097 58.41 0.370 339.3 0.079 0.103 64.13 0.370 334.4 0.081 0.109 70.02 0.370 334.4 0.083 0.116 76.08 0.370 339.5 0.085 0.122 82.31 0.370 334.6 0.086 0.129 88.70 0.370 334.7 0.088 0.136 95.24 0.370 334.8 0.090 0.142 101.9 0.370 339.8 0.092 0.150 108.8 0.370 334.9 0.094 0.157 115.8 0.370 335.0 0.096 0.164 122.9 0.370 335.1 0.098 0.172 130.2 0.370 335.1 0.100 0.179 137.6 0.370 335.2 0.102 0.187 145.2 0.370 335.3 0.104 0.195 152.9 0.370 335.4 0.106 0.204 160.7 0.370 335.5 0.108 0.212 168.6 0.370 335.5 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.519977 5 year 0.632449 10 year 0.702504 25 year 0.787089 50 year 0.847849 100 year 0.907062 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Unmitigated Flow (cfs) 0.519477 0.632449 0.702504 0.787089 0.847899 0.907062 Periods for Developed M~.tigated Flow (cfs ) 0.54587 1.518176 2.680528 5.049867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.490 0.062 1957 0.792 0.441 1958 0.455 0.000 1959 0.532 0.005 1960 0.585 0.178 1961 0.389 0.000 1962 0.420 0.000 1963 0.893 0.274 1964 0.612 0.181 1965 0.574 0.2.22 1966 0.409 0.000 1967 0.493 0.056 1968 0.387 0.000 1969 0.383 0.000 1970 0.382 0.000 1971 0.475 0.022 1972 0.566 0.194 1973 0.450 0.000 1979 0.524 0.122 1975 0.454 0.016 1976 0.522 0.059 1977 0.661 0.155 1978 0.562 0.113 1979 0.669 0.086 1980 0.501 0.000 ]981 0.573 0.187 1982 0.663 0.182 1983 0.710 0.277 1984 0.433 0.000 1985 0.501 0.000 1986 0.557 0.161 1987 0.597 0.240 1988 0.332 0.000 1989 0.397 0.000 1990 0.782 0.913 1991 0.789 0.411 1992 0.488 0.033 1993 0.357 0.000 1994 0.397 0.000 1995 0.575 0.220 1996 0.584 0.199 1997 0.470 0.053 1998 0.659 0.170 1999 0.566 0.168 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7921 0.4131 2 0.7895 0.4111 3 0.7816 0.2767 4 0.7096 0.2744 5 0.6685 0.2900 6 0.6629 0.2222 7 0.6611 0.2200 8 0.6588 0.1993 9 0.6121 0.1992 10 0.5968 0.1868 11 0.5852 0.1822 12 0.5837 0.1813 13 0.5751 0.1781 14 0.5742 0.1700 15 0.5735 0.1677 16 0.5659 0.1608 17 0.5657 0.1550 18 0.5616 0.1216 19 0.5570 0.1135 20 0.5317 0.0861 0.5236 0.0616 0.5229 0.0587 0.5014 0.0563 0.5007 0.0532 0.4933 0.0332 0.4899 0.0224 0.4877 0.0161 0.4750 0.0054 0.4703 0.0000 0.4551 0.0000 0.4536 0.0000 0.4497 0.0000 0.4328 0.0000 0.4200 0.0000 0.4044 0.0000 0.3971 0.0000 0.3970 0.0000 0.3894 0.0000 0.3875 0.0000 0.3829 0.0000 0.3824 0.0000 0.3573 0.0000 0.3318 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2597 1051 11 1.0 Pass 0.2657 981 9 .0 Pass 0.2716 913 8 .0 Pass 0.2776 842 5 .0 Pass 0.2835 788 5 .0 Pass 0.2894 719 5 .0 Pass 0.2954 669 5 .0 Pass 0.3013 629 5 .0 Pass 0.3073 583 5 .0 Pass 0.3132 535 5 .0 Pass 0.3191 498 5 1.0 Pass 0.3251 956 5 1.0 Pass 0.3310 428 5 1.0 Pass 0.3370 399 5 1.0 Pass 0.3429 365 5 1.0 Pass 0.3988 340 5 1.0 Pass 0.3548 315 4 1.0 Pass 0.3607 297 4 1.0 Pass 0.3667 278 4 1.0 Pass 0.3726 255 4 1.0 Pass 0.3785 241 4 1.0 Pass 0.3845 223 9 1.0 Pass 0.3909 202 4 1.0 Pass 0.3964 190 4 2.0 Pass 0.4023 174 4 2.0 Pass 0.4083 167 3 1.0 Pass 0.4142 161 1 .0 Pass 0.4201 154 1 .0 Pass 0.4261 147 1 .0 Pass 0.4320 142 1 .0 Pass 0.4380 138 1 .0 Pass 0.4439 137 0 .0 Pass 0.9998 124 0 .0 Pass 0.4558 117 0 .0 Pass 0.9617 108 0 .0 Pass 0.9677 109 0 .0 Pass 0.4736 97 0 .0 Pass 0.9795 91 0 .0 Pass 0.4855 87 0 .0 Pass 0.4919 82 0 .0 Pass 0.4974 74 0 .0 Pass 0.5033 67 0 .0 Pass 0.5092 66 0 .0 Pass 0.5152 60 0 .0 Pass 0.5211 58 0 .0 Pass 0.5271 54 0 .0 Pass 0.5330 50 0 .0 pass 0.5389 46 0 .0 Pass 0.5449 46 0 .0 Pass 0.5508 41 0 .0 Pass 0.5568 38 0 .0 Pass 0.5627 36 0 .0 Pass 0.5686 34 0 .0 Pass 0.5746 29 0 .0 pass 0.5805 26 0 .0 Pass 0.5865 23 0 .0 P~;; 0.5924 23 0 .0 Pass 0.5983 19 0 .0 Pass 0.6043 19 0 .0 Pass 0.6102 18 0 .0 Pass 0.6162 16 0 .0 Pass 0.6221 16 0 .0 Pass 0.6281 16 0 .0 Pass 0.6340 15 0 .0 Pass 0.6399 14 0 .0 Pass 0.6459 12 0 .0 Pass 0.6518 12 0 .0 Pass 0.6578 12 0 .0 Pass 0.6637 9 0 .0 Pass 0.6696 8 0 .0 Pass 0.6756 8 0 .0 Pass 0.6815 8 0 .0 Pass 0.6875 8 0 .0 Pass 0.6939 7 0 .0 Pass 0.6993 6 0 .0 Pass 0.7053 6 0 .0 Pass 0.7112 5 0 .0 Pass 0.7172 5 0 .0 Pass 0.7231 5 0 .0 Pass 0.7290 5 0 .0 Pass 0.7350 5 0 .0 Pass 0.7409 5 0 .0 Pass 0.7969 5 0 .0 Pass 0.7528 5 0 .0 Pass 0.7587 5 0 .0 Pass 0.7647 5 0 .0 Pass 0.7706 5 0 .0 Pass 0.7766 5 0 .0 Pass 0.7825 4 0 .0 Pass 0.7884 4 0 .0 Pass 0.7944 1 0 .0 Pass 0.8003 1 0 .0 Pass 0.8063 1 0 .0 Pass 0.8122 1 0 .0 Pass 0.8181 1 0 .0 Pass 0.8241 1 0 .0 Pass 0.8300 1 0 .0 Pass 0.8360 1 0 .0 Pass 0.8419 1 0 .0 Pass 0.8478 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.138 acre-feet On-line facility target flow: 0.9 cfs. Adjusted for 15 min: 0.96 cfs. Off-line facility target flow: 0.2 cfs. Adjusted for 15 min: 0.22 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of busrness information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~Q~ jAkkkxkhk;+~kk7>44GG~{-:di~?P~fi~D4L~Opskkkkhkk ~,a4~~~~~"'~'~~''~ o Predevelvped x Deveivpec~kiitigated x x 99 Yearly Peaks for Predeveloped Flow Frequency Chart PEAR FLOW {Ns) 100 ° 4500 .-°-...-°--_ ~ o Pre4e+reloped 50 .4201 ~ ~ ~ ~ x Deuelopsd w~ Facii~ 25 3$95 0 35 ~ ~. 10 3459 "` 0 27 - _ e ~ ~ ~ _ __ro _ . e .._ 5 3117 U "' 020 - - - - _- 2 2551 ~ 013 - - - - - ___ t V N_ 1~-5 ~ 10E•d 10E•3 10E~2 10E.1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph 'TEAR FLOW {t?s) 100 11 38 13 ~~ 1 50 ~~1 .: ~ ~~ y~~ ~` i~ [ i f£ #3 '3= ~jl 25 SD45 ~';~' ~;; ;,' i 10 2,8$1 ~ ~ ~ ~' ~ ; ~ , ! ~ ~ 5 1518 i; _ ; 2 5459 ' ` ' ` i ~ ~ ma 'early Peaks for Developed W/Pond CLEARHIS BSN G1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G1 0 08 7 83 BSN G1 0 13 7 83 BSN G1 0 22 7 83 BSN G1 0 26 7 83 BSN G1 0 28 7 83 BSN G1 0 30 7 83 yr Drainage Area: BSN G1 Hyd Method SBUH Hyd Peak Factor: 484.00 Storm Dur 24.00 hrs Area CN Pervious 0 0841 ac 78.00 Impervious 0.2862 ac 98.00 Total 0.3703 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type. Description Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Driveway BSN G2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G2 0 04 7 83 BSN G2 0 07 7 83 BSN G2 0 11 7 83 BSN G2 0 13 7 83 BSN G2 0 14 7 83 BSN G2 0 15 7 83 yr Drainage Area: BSN G2 Hyd Method• SBUH Hyd Peak Factor. 484 00 Storm Dur 24 00 hrs Area CN Pervious 0.0320 ac 78.00 Impervious 0.1423 ac 98.00 Peak Vol Area (ac-ft) ac 0 0264 0 37 0 0457 0 37 0 0739 0 37 0 0884 0 37 0 0957 0 37 0 1030 0 37 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUHlSCS TYPE1A 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUHlSCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs 0.20 Intv• 10.00 mm TC 0 03 hrs 0 07 hrs 0.0841 ac 0.1714 ac 0.1148 ac Length Slope: Coeff. Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length: Slope Coeff. Travel Time 444.00 ft 1 77% 27.0000 2 06 min 1850 ft 200% 00110 0.40 min 100.00 ft 0 50% 21.0000 1.12 min 20.00 ft 2.00% 0 0110 0.42 min Peak Vol Area (ac-ft) ac 0 0130 0 17 0 0223 0 17 0 0358 0 17 0 0427 0 17 0 0462 0 17 0 0497 0 17 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPEIA 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPEIA 50 yr SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs 0.20 Intv: 10 00 mm TC 0 03 hrs 0.06 hrs Total 0 1743 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0320 ac Impervious CN Data: ROADWAY 98 00 0.0849 ac DRIVEWAY 98.00 0 0574 ac Pervious TC Data: Flow type Description: Length• Slope: Coeff Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type: Description• Length: Slope• Coeff. Travel Time Shallow Along Flow Line of Gutter 198.00 ft 0 50% 27 0000 2.30 min Sheet Across Roadway 18.50 ft 2 00% 0.0110 0 40 mm Channel Through Strom Water Pipe 50 00 ft 0 50% 21 0000 0 56 min Sheet Across Driveway 20 00 ft 2.00% 0 0110 0.42 min BSN G3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN G3 0 07 7 83 0 0220 0 28 SBUH/SCS TYPE1A 6 mo BSN G3 0 11 7 83 0 0373 0 28 SBUHlSCS TYPE1A 2 yr BSN G3 0 18 7 83 0 0592 0 28 SBUH/SCS TYPEIA 10 yr BSN G3 0 21 7 83 0 0703 0 28 SBUH/SCS TYPE1A 25 yr BSN G3 0 23 7 83 0 0759 0 28 SBUH/SCS TYPEIA 50 yr BSN G3 0 25 7 83 0 0815 0 28 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN G3 Hyd Method: SBUH Hyd Loss Metho d: SC S CN Number Peak Factor 484.00 SCS Abs. 0 2 0 Storm Dur• 24 00 hrs Intv. 10. 00 min Area CN TC Pervious 0 0318 ac 78 00 0 03 hrs Impervious 0.2437 ac 98.00 0 05 hrs Total 0.2755 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0 0318 ac Impervious CN Data: ROADWAY 98 00 0.1629 ac DRIVEWAY 98.00 0 0574 ac SIDEWALK 98.00 0 0234 ac Pervious TC Data: Flow type' Description' Length: Slope: Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1 90 min Impervious TC Data: Flow type: Description• Length. Slope. Coeff• Travel Time Shallow Along Flow Line of Gutter 194.00 ft 0.54% 27.0000 1.63 min Sheet Across Roadway 18.50 ft 2.00% 0 0110 0.40 min Channel Through Strom Water Pipe 100 00 ft 0 50% 21 0000 1 12 min Sheet Across Sidewalks 5.00 ft 2.00% 0 0110 0.14 min BSN G4 Event Summary: BasinlD Peak Q Event ------- (cfs) BSN G4 0 06 BSN G4 0 10 BSN G4 0 16 BSN G4 0 19 BSN G4 0 21 BSN G4 0 22 yr Drainage Area: BSN G4 Hyd Method• SBUH Hyd Peak Factor. 484.00 Storm Dur• 24.00 hrs Peak T Peak Vol Area Method Ramtype (hrs) (ac-ft) ac /Loss 7 83 0 0194 0 25 SBUH/SCS TYPE1A 6 mo 7 83 0 0331 0 25 SBUH/SCS TYPE1A 2 yr 7 83 0 0528 0 25 SBUH/SCS TYPEIA 10 yr 7 83 0 0628 0 25 SBUH/SCS TYPEIA 25 yr 7 83 0 0678 0 25 SBUH/SCS TYPEIA 50 yr 7 83 0 0729 0 25 SBUH/SCS TYPEIA 100 Area CN Pervious 0.0377 ac 78.00 Impervious 0.2134 ac 98.00 Total 0.2511 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method SCS CN Number SCS Abs 0 20 Inty. 10 00 min TC 0 03 hrs 0 04 hrs 0 0377 ac 0.1441 ac 0 0234 ac 0 0459 ac Length: Slope• Coeff: Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length Slope Coeff Travel Time 173.00 ft 2 28% 27 0000 0.71 min 18.50 ft 2 00% 0.0110 0 40 min 100 00 ft 0.50% 21.0000 1.12 min 5 00 ft 2.00% 0 0110 0.14 mm ADDHYD [BSN G1] AS [6 mo] [BSN G2] AS (6 mo] TO [BSN G1 +BSN G2] Peak Flow: 0 1169 cfs Peak Time• 7.83 hrs Hyd Vol: 1716 22 cf - 0 0394 acft ADDHYD [BSN G1] AS [2 yrj [BSN G2] AS [2 yrj TO [BSN G1 +BSN G2] Peak Flow: 0 1997 cfs Peak Time• 7 83 hrs Hyd Vol. 2964 38 cf - 0 0681 acft ADDHYD [BSN G1] AS [10 yr] [BSN G2] AS [10 yr] TO [BSN G1 +BSN G2] Peak Flow 0.3240 cfs Peak Time 7 83 hrs Hyd Vol: 4782 34 cf - 0.1098 acft ADDHYD [BSN G1] AS [25 yr] [BSN G2] AS [25 yr] TO [BSN G1 +BSN G2j Peak Flow: 0.3876 cfs Peak Time 7 83 hrs Hyd Vol: 5713 03 cf - 0 1312 acft ADDHYD [BSN G1] AS [50 yr] [BSN G2] AS [50 yr] TO [BSN G1 +BSN G2] Peak Flow• 0 4197 cfs Peak Time• 7 83 hrs Hyd Vol 6181 85 cf - 0 1419 acft ADDHYD [BSN G1] AS [100 yr] [BSN G2] AS [100 yr] TO [BSN G1 +BSN G2j Peak Flow 0.4520 cfs Peak Time 7 83 hrs Hyd Vol 6652 71 cf - 0.1527 acft ADDHYD [BSN G3] AS [6 mo] [BSN G4) AS [6 mo) TO [BSN G3 +BSN G4] Peak Flow• 0 1281 cfs Peak Time 7.83 hrs Hyd Vol. 1802.40 cf - 0.0414 acft ADDHYD [BSN G3] AS [2 yr] [BSN G4] AS (2 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 2159 cfs Peak Time 7.83 hrs Hyd Vol 3066 86 cf - 0.0704 acft ADDHYD [BSN G3] AS [10 yr] [BSN G4) AS (10 yr) TO [BSN G3 +BSN G4] Peak Flow. 0.3427 cfs Peak Time 7 83 hrs Hyd Vol: 4879 12 cf - 0 1120 acft ADDHYD [BSN G3] AS [25 yr] [BSN G4] AS [25 yr] TO [BSN G3 +BSN G4] Peak Flow: 0.4067 cfs Peak Time• 7 83 hrs Hyd Vol 5799.30 cf - 0.1331 acft ADDHYD [BSN G3] AS [50 yr] [BSN G4] AS [50 yr] TO [BSN G3 +BSN G4] Peak Flow• 0 4389 cfs Peak Time 7.83 hrs Hyd Vol• 6261.49 cf - 0 1437 acft ADDHYD [BSN G3] AS [100 yr] [BSN G4] AS (100 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 4711 cfs Peak Time• 7.83 hrs Hyd Vol• 6724 85 cf - 0 1544 acft ADDHYD [BSN G1 +BSN G2] AS [6 mo] (BSN G3 +BSN G4] AS [6 mo) TO (BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow• 0.2450 cfs Peak Time• 7.83 hrs Hyd Vol: 3518 62 cf - 0 0808 acft ADDHYD [BSN G1 +BSN G2] AS [2 yr] (BSN G3 +BSN G4] AS [2 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow. 0.4156 cfs Peak Time: 7.83 hrs Hyd Vol: 6031 24 cf - 0 1802 acft ADDHYD [BSN G1 +BSN G2] AS [10 yr] [BSN G3 +BSN G4) AS [10 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow 0.6667 cfs Peak Time. 7 83 hrs Hyd Vol: 9661 46 cf - 0 2218 acft ADDHYD [BSN G1 +BSN G2] AS [25 yr] [BSN G3 +BSN G4) AS [25 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0.7943 cfs Peak Time: 7.83 hrs Hyd Vol: 11512.33 cf - 0 2749 acft ADDHYD [BSN G1 +BSN G2] AS [50 yr] [BSN G3 +BSN G4] AS [50 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 8586 cfs Peak Time• 7 83 hrs Hyd Vol• 12443 34 cf - 0 2856 acft ADDHYD [BSN G1 +BSN G2] AS (100 yr] [BSN G3 +BSN G4] AS [100 yr) TO [BSN G1 + BSN G2 +BSN G3 +BSN G4] Peak Flow. 0 9231 cfs Peak Time: 7.83 hrs Hyd Vol• 13377.56 cf - 0 3071 acft Hydrograph ID: BASIN G Area: 1.0712 ac Hyd Int: 10.00 min Base Flow: Peak Flow 0 9231 cfs Peak Time: 7 83 hrs Hyd Vol: 0.3071 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 3581 16 33 0 1233 0 83 0 0126 8 83 0 3082 16 50 0 1233 1 00 0 0225 9 00 0 3195 16 67 0 1234 1 17 0 0338 9 17 0 2685 16 83 0 1234 1 33 0 0443 9 33 0 2327 17 00 0 1235 1 50 0 0509 9 50 0 2410 17 17 0 1184 1 67 0 0593 9 67 0 2244 17 33 0 1146 1 83 0 0665 9 83 0 2143 17 50 0 1155 2 00 0 0707 10 00 0 2168 17 67 0 1153 2 17 0 0777 10 17 0 2017 17 83 0 1155 2 33 0 0836 10 33 0.1909 18 00 0 1155 2 50 0 0863 10 50 0 1935 18 17 0 1104 2 67 0 0891 10 67 0 1831 18 33 0 1066 2 83 0 0914 10 83 0 1760 18 50 0 1075 3 00 0 0934 11 00 0 1778 18 67 0 1073 3 17 0 0951 11 17 0.1725 18 83 0 1074 3 33 0 0967 11 33 0 1690 19 00 0 1074 3 50 0 0980 11 50 0 1700 19 17 0 1023 3 67 0 1030 11 67 0 1649 19 33 0 0985 3 83 0 1072 11 83 0 1613 19 50 0 0994 4 00 0 1077 12 00 0 1623 19 67 0 0992 4 17 0 1165 12 17 0 1572 19 83 0 0993 4 33 0 1236 12 33 0 1536 20 00 0 0993 4 50 0 1233 12 50 0 1545 20 17 0 0993 4 67 0 1324 12 67 0 1494 20 33 0 0994 4 83 0 1396 12 83 0 1458 20 50 0 0994 5 00 0 1400 13 00 0 1467 20 67 0 0994 5 17 0 1498 13 17 0 1465 20 83 0 0994 5 33 0 1575 13 33 0 1467 21 00 0 0994 5 50 0 1577 13 50 0 1468 21 17 0 0995 5 67 0 1677 13 67 0 1418 21 33 0 0995 5 83 0.1755 13 83 0 1381 21 50 0 0995 6 00 0 1755 14 00 0 1390 21 67 0 0995 6 17 0 1943 14 17 0 1388 21 83 0 0996 6 33 0 2091 14 33 0 1390 22 00 0 0996 6 50 0 2079 14 50 0 1390 22 17 0 0945 6.67 0 2364 14 67 0 1341 22 33 0 0906 6 83 0 2584 14 83 0 1303 22 50 0 0915 7 00 0 2560 15 00 0 1312 22 67 0 0913 7 17 0 2903 15 17 0 1311 22 83 0 0914 7 33 0 3163 15 33 0 1312 23 00 0 0914 7 50 0 3133 15 50 0 1312 23 17 0 0914 7 67 0 6550 15 67 0 1262 23 33 0 0914 7 83 0 9231 15 83 0 1225 23 50 0 0915 8 00 0 8788 16 00 0 1234 23 67 0 0915 8 17 0 6131 16 17 0 1232 23 83 0 0915 8 33 0 3922 16 33 0 1233 24 00 0 0915 8.50 0 4432 16 50 0 1233 24 17 0 0348 Hydrograph ID: BASIN G Area: 1.0712 ac Hyd Int 10 00 min Base Flow. Peak Flow• 0.9231 cfs Peak Time 7 83 hrs Hyd Vol 0 3071 acft MOVEHYD [BASIN G] TO [BASIN G - 6 mo] AS [6 mo] Peak Flow: 0.2450 cfs Peak Time: 7.83 hrs Hyd Vol• 3518 62 cf - 0 0808 acft MOVEHYD [BASIN G] TO [BASIN G - 100 yr] AS [100 yr] Peak Flow: 0.9231 cfs Peak Time. 7 83 hrs Hyd Vol: 13377 56 cf - 0 3071 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifices Start EI Max EI Increment 327 0000 ft 333.0000 ft 0.10 Infil 10.00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE G Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Routing Method• Travel Time Translation Hyd params By 0 0250 Mannings Formula Length Slope Entrance Loss 160.0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3.0000 ft 2 OOh.1 v 2.OOh.1 v Up Node Dn Node Up Invert Dn Invert DUMMY G 0 0000 ft 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0 5000 ft 1 0000 ft 3 0000 ft 0 5000 ft 1 0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.0000 ac 0.0000 cf 0 0000 cf 0 0000 ft/s 0.0000 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0 000000 ft 0 0000 ft ROUTEHYD [BASIN G - 6 MO] THRU [BIOSWALE G] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE G 1 0712 0 2450 ---- 1 00 0 0673 Ditch 0 5603 ----- BASIN r ROUTEHYD [BASIN G - 100 YR] THRU [BIOSWALE G] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE G 1.0712 0 9231 ---- 1 00 0 1455 Ditch 0 7811 ----- BASIN G Node ID: INFILTRATION G Desc: Manhole structure Start EI. 333 0000 ft Max EI 334 0000 ft Contrib Basin. Contrib Hyd: Length Width Void Ratio 160 0000 ft 10.0000 ft 39 00 Node ID: BASIN G RPL Desc: Manhole structure Start EI: 333.0000 ft Max EI• 334.0000 ft Contnb Basin. Contrib Hyd Storage Id• INFILTRATION G Discharge Id• INFILTRATION RLPCOMPUTE [BASIN G RPL] SUMMARY 100 YR MatchO=PeakQ= 0 9231 cfs Peak Out O. 0 3141 cfs -Peak Stg 333.90 ft - Actlve Vol: 1314.99 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -G Sate Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precap Scale: 0.80 PREDEVELOPED LAND USE Basin Basin Flows To Point Groundwater: No Land Use OUTWASH GRASS IMPERVIOUS: G of Compliance Acres 1.64 2.07 DEVELOPED LAND USE Basin Basin G Flows To Bio-Infiltration Swale G Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale G Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raan / Evap is not activated. DimPnClnnR Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.021 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.5 0.037 0.000 0.000 0.000 332.6 0.039 0.003 0.000 0.370 332.7 0.090 0.006 0.000 0.370 332.7 0.042 0.009 0.000 0.370 332.8 0.049 0.013 0.000 0.370 ~° -. ~'~ ~ ~~ v ~ v~,~• ,~SEPH D,~If~ ' ~~0~ WAS}U(C `~Q ,t. T ,~ O „" /!~ RF 3y5~s `, ~~ a IDIYAL~~~~ ~OJ tia(v~s~s• (i-n- o 332.9 0.096 0.016 0.000 0.370 333.0 0.047 0.020 0.000 0.370 333.0 0.049 0.023 0.411 0.370 333.1 0.051 0.027 1.873 0.370 333.2 0.053 0.031 3.920 0.370 333.3 0.055 0.036 6.916 0.370 333.4 0.057 0.040 9.2_92 0.370 333.4 0.058 0.044 12.50 0.370 333.5 0.060 0.049 16.01 0.370 333.6 0.062 0.059 19.81 0.370 333.7 0.064 0.059 23.86 0.370 333.7 0.066 0.064 28.15 0.370 333.8 0.068 0.069 32.67 0.370 333.9 0.069 0.074 37.42 0.370 334.0 0.071 0.080 42.37 0.370 339.1 0.073 0.085 47.53 0.370 334.1 0.075 0.091 52.88 0.370 334.2 0.077 0.097 58.41 0.370 334.3 0.079 0.103 64.13 0.370 334.4 0.081 0.109 70.02 0.370 334.9 0.083 0.116 76.08 0.370 334.5 0.085 0.122 82.31 0.370 339.6 0.086 0.129 88.70 0.370 334.7 0.088 0.136 95.24 0.370 334.8 0.090 0.142 101.9 0.370 334.8 0.092 0.150 108.8 0.370 334.9 0.094 0.157 115.8 0.370 335.0 0.096 0.169 122_.9 0.370 335.1 0.098 0.172 130.2 0.370 335.1 0.100 0.179 137.6 0.370 335.2 0.102 0.187 195.2 0.370 335.3 0.104 0.195 152.9 0.370 335.4 0.106 0.204 160.7 0.370 335.5 0.108 0.212 168.6 0.370 335.5 0.110 0.220 176.7 0.370 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.519477 5 year 0.632449 10 year 0.702509 25 year 0.787089 50 year 0.847849 100 year 0.907062 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.519477 5 year 0.632449 10 year 0.702504 25 year 0.787089 50 year 0.897899 100 year 0.907062 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.490 0.062 1957 0.792 0.441 1958 0.455 0.000 1959 0.532 0.005 1960 0.585 0.178 1961 0.389 0.000 1962 0.420 0.000 1963 0.843 0.274 1969 0.612 0.181 1965 0.574 0.222 1966 0.404 0.000 1967 0.493 0.056 1968 0.387 0.000 1969 0.383 0.000 1970 0.382 0.000 1971 0.475 0.022 1972 0.566 0.194 1973 0.450 0.000 1974 0.524 0.122 1975 0.459 0.016 1976 0.522 0.059 1977 0.661 0.155 1978 0.562 0.113 1979 0.669 0.086 1980 0.501 0.000 1981 0.573 0.187 1982 0.663 0.182 1983 0.710 0.277 1984 0.433 0.000 1985 0.501 0.000 1986 0.557 0.161 1987 0.597 0.290 1988 0.332 0.000 1989 0.397 0.000 1990 0.782 0.413 1991 0.789 0.411 1992 0.488 0.033 1993 0.357 0.000 1994 0.397 0.000 1995 0.575 0.220 1996 0.584 0.199 1997 0.470 0.053 1998 0.659 0.170 1999 0.566 0.168 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7921 0.4131 2 0.7895 0.4111 3 0.7816 0.2767 4 0.7096 0.2744 5 0.6685 0.2400 6 0.6629 0.2222 7 0.6611 0.2200 8 0.6588 0.1993 9 0.6121 0.1942 10 0.5968 0.1868 11 0.5852 0.1822 12 0.5837 0.1813 13 0.5751 0.1781 14 0.5742 0.1700 15 0.5735 0.1677 16 0.5659 0.1608 17 0.5657 0.1550 18 0.5616 0.1216 19 0.5570 0.1135 20 0.5317 0.0861 21 0.5236 0.0616 22 0.5229 0.0587 23 0.5014 0.0563 24 0.5007 0.0532 25 0.9933 0.0332 26 0.9899 0.0229 27 0.9877 0.0161 28 0.4750 0.0059 29 0.4703 0.0000 30 0.4551 0.0000 31 0.4536 0.0000 32 0.4497 0.0000 33 0.9328 0.0000 34 0.4200 0.0000 35 0.4044 0.0000 36 0.3971 0.0000 37 0.3970 0.0000 38 0.3899 0.0000 39 0.3875 0.0000 40 0.3829 0.0000 41 0.3829 0.0000 42 0.3573 0.0000 43 0.3318 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final 0.2597 1051 11 0.2657 981 9 0.2716 913 8 0.2776 842 5 0.2835 788 5 0.2899 719 5 0.2959 669 5 0.3013 624 5 0.3073 583 5 0.3132 535 5 0.3191 498 5 0.3251 456 5 0.3310 428 5 0.3370 399 5 0.3429 365 5 0.3488 390 5 0.3598 315 4 0.3607 297 4 0.3667 278 4 0.3726 255 4 0.3785 241 4 0.3845 223 4 0.3904 202 4 0.3964 190 4 0.4023 174 9 0.4083 167 3 0.4142 161 1 0.4201 154 1 0.4261 147 1 0.4320 142 1 0.4380 138 1 0.4939 137 0 0.9498 124 0 0.4558 117 0 0.4617 108 0 0.4677 104 0 0.4736 97 0 0.4795 91 0 0.4855 87 0 0.4914 82 0 0.4974 79 0 0.5033 67 0 0.5092 66 0 Percentage Pass/Fail 1.0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 1.0 Pass 2.0 Pass 2.0 Pass 1.0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass .0 Pass 0.5152 60 0 .0 Pass 0.5211 58 0 .0 Pass 0.5271 54 0 .0 Pass 0.5330 50 0 .0 Pass 0.5389 46 0 .0 Pass 0.5449 96 0 .0 Pass 0.5508 41 0 .0 Pass 0.5568 38 0 .0 Pass 0.5627 36 0 .0 Pass 0.5686 34 0 .0 Pass 0.5746 29 0 .0 Fass 0.5805 26 0 .0 Pass 0.5865 23 0 .0 Pass 0.5924 23 0 .0 Pass 0.5983 19 0 .0 Pass 0.6043 19 0 .0 Pass 0.6102 18 0 .0 Pass 0.6162 16 0 .0 Pass 0.6221 16 0 .0 Pass 0.6281 16 0 .0 Pass 0.6340 15 0 .0 Pass 0.6399 14 0 .0 Pass 0.6459 12 0 .0 Pass 0.6518 12 0 .0 Pass 0.6578 12 0 .0 Pass 0.6637 9 0 .0 Pass 0.6696 8 0 .0 Pass 0.6756 8 0 .0 Pass 0.6815 8 0 .0 Pass 0.6875 8 0 .0 Pass 0.6934 7 0 .0 Pass 0.6993 6 0 .0 Pass 0.7053 6 0 .0 Pass 0.7112 5 0 .0 Pass 0.7172 5 0 .0 Pass 0.7231 5 0 .0 Pass 0.7290 5 0 .0 Pass 0.7350 5 0 .0 Pass 0.7409 5 0 .0 Pass 0.7469 5 0 .0 Pass 0.7528 5 0 .0 Pass 0.7587 5 0 .0 Pass 0.7697 5 0 .0 Pass 0.7706 5 0 .0 Pass 0.7766 5 0 .0 Pass 0.7825 4 0 .0 Pass 0.7884 4 0 .0 Pass 0.7944 1 0 .0 Pass 0.8003 1 0 .0 Pass 0.8063 1 0 .0 Pass 0.8122 1 0 .0 Pass 0.8181 1 0 .0 Pass 0.8241 1 0 .0 Pass 0.8300 1 0 .0 Pass 0.8360 1 0 .0 Pass 0.8419 1 0 .0 Pass 0.8478 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.138 acre-feet On-line facility target flow: 0.9 cfs. Ad3usted for 15 min: 0.46 cfs. Off-line facility target flow: 0.2 cfs. Adjusted for 15 min: 0.22 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (tncluding without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even ~F AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 kXkXYkkkkkYYSSti°~Mtd4s14CdSfl4C~00skkkkkxk '~ 1-Q ...r ~ a paGOGOdaO~ GGGGGOac{~%~ o Ptedeveloped y 1uE-1 x Developec~~iitigated ~ ~x C! 10E-2 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart ~ o Predeveloped ~ q x Developed w~ factlrt~ 0 35 ~ . v - ~ 0 27 _- _ _ .._ - _ - _ w U m ~ 013 -. ~-_ _~__ .__ .C U N_ 1UE~5 ~ 10E•4 10E•3 10E~2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph PEAR FLpW {c1s) -- 100 ~ 11 38 ~~,,,~ ~; ;~ 50 ~ 7 701 ~ ~ ° ~ ` 25 5 b45 , ~ ~ , 1 { 1 i ~3~~ j 10 2.681 ......~. , I 1 z ~_ ~ , S Q 1 518 ~-- _ ` _ , 2 .5459 ~ ~ ~ ~ ' early Peaks for Developed WlPond CLEARHIS BSN G1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN G1 0 08 7 83 0 0264 0 37 SBUH/SCS TYPEIA 6 mo BSN G1 0 13 7 83 0 0457 0 37 SBUH/SCS TYPEIA 2 yr BSN G1 0 22 7 83 0 0739 0 37 SBUH/SCS TYPE1A 10 yr BSN G1 0 26 7 83 0 0884 0 37 SBUH/SCS TYPEIA 25 yr BSN G1 0 28 7 83 0 0957 0 37 SBUH/SCS TYPEIA 50 yr BSN G1 0 30 7 83 0 1030 0 37 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN G1 Hyd Method. SBUH Hyd Loss Metho d: SC S CN Number Peak Factor: 484 00 SCS Abs 0.2 0 Storm Dur 24 00 hrs Intv 10 00 min Area CN TC Pervious 0 0841 ac 78 00 0 03 hrs Impervious 0 2862 ac 98.00 0.07 hrs Total 0.3703 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 0 0841 ac Impervious CN Data: ROADWAY 98 00 0.1714 ac DRIVEWAY 98 00 0 1148 ac Pervious TC Data: Flow type. Description: Length: Slope Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0 2400 1 90 min Impervious TC Data: Flow type: Description: Length: Slope Coeff. Travel Time Shallow Along Flow Lme of Gutter 444.00 ft 1.77% 27 0000 2.06 min Sheet Across Roadway 18 50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 100.00 ft 0.50% 21 0000 1.12 min Sheet Across Driveway 20.00 ft 2.00% 0 0110 0.42 min BSN G2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN G2 0 04 7 83 0 0130 0 17 SBUH/SCS TYPEIA 6 mo BSN G2 0 07 7 83 0 0223 0 17 SBUH/SCS TYPEIA 2 yr BSN G2 0 11 7 83 0 0358 0 17 SBUH/SCS TYPEIA 10 yr BSN G2 0 13 7 83 0 0427 0 17 SBUH/SCS TYPEIA 25 yr BSN G2 0 14 7 83 0 0462 0 17 SBUH/SCS TYPE1A 50 yr BSN G2 0.15 7 83 0 0497 0 17 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN G2 Hyd Method: SBUH Hyd Loss Method SCS CN Number Peak Factor 484 00 SCS Abs~ 0 20 Storm Dur 24 00 hrs Intv 10 00 min Area CN TC Pervious 0.0320 ac 78.00 0 03 hrs Impervious 0.1423 ac 98 00 0 06 hrs Total 0 1743 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0320 ac Impervious CN Data: ROADWAY 98 00 0.0849 ac DRIVEWAY 98 00 0.0574 ac Pervious TC Data: Flow type Description Length. Slope• Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1 90 min Impervious TC Data: Flow type: Description. Length Slope: Coeff Travel Time Shallow Along Flow Line of Gutter 198 00 ft 0 50% 27 0000 2 30 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 50 00 ft 0 50% 21 0000 0.56 min Sheet Across Driveway 20.00 ft 2.00% 0.0110 0 42 min BSN G3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN G3 0 07 7 83 0 0220 0 28 SBUH/SCS TYPEIA 6 mo BSN G3 0 11 7 83 0 0373 0 28 SBUH/SCS TYPEIA 2 yr BSN G3 0 18 7 83 0 0592 0 28 SBUH/SCS TYPEIA 10 yr BSN G3 0.21 7 83 0 0703 0 28 SBUH/SCS TYPEIA 25 yr BSN G3 0 23 7 83 0 0759 0 28 SBUH/SCS TYPEIA 50 yr BSN G3 0 25 7 83 0 0815 0 28 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN G3 Hyd Method: SBUH Hyd Loss Method. SC S CN Number Peak Factor. 484.00 SCS Abs 0.2 0 Storm Dur 24 00 hrs Intv 10. 00 min Area CN TC Pervious 0.0318 ac 78 00 0 03 hrs Impervious 0.2437 ac 98.00 0.05 hrs Total 0.2755 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0318 ac Impervious CN Data: ROADWAY 98.00 0 1629 ac DRIVEWAY 98.00 0.0574 ac SIDEWALK 98.00 0 0234 ac Pervious TC Data: Flow type. Description: Length• Slope• Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0 2400 1 90 min Impervious TC Data: Flow type: Description Length: Slope: Coeff• Travel Time Shallow Along Flow Line of Gutter 194.00 ft 0.54% 27.0000 1 63 min Sheet Across Roadway 18.50 ft 2.00% 0 0110 0 40 min Channel Through Strom Water Pipe 100.00 ft 0 50% 21 0000 1 12 min Sheet Across Sidewalks 5.00 ft 2.00% 0 0110 0.14 min BSN G4 Event Summary: BasinlD Peak Q Event ------- (cfs) BSN G4 0 06 BSN G4 0 10 BSN G4 0 16 BSN G4 0 19 BSN G4 0 21 BSN G4 0 22 yr Drainage Area: BSN G4 Hyd Method SBUH Hyd Peak Factor: 484.00 Storm Dur. 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0194 0 25 SBUH/SCS TYPE1A 6 mo 7 83 0 0331 0.25 SBUH/SCS TYPEIA 2 yr 7 83 0 0528 0 25 SBUH/SCS TYPE1A 10 yr 7 83 0 0628 0 25 SBUH/SCS TYPEIA 25 yr 7 83 0 0678 0 25 SBUH/SCS TYPEIA 50 yr 7 83 0 0729 0 25 SBUH/SCS TYPE1A 100 Area CN Pervious 0 0377 ac 78 00 Impervious 0.2134 ac 98 00 Total 0.2511 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description: Sheet Across Planter Stnp Impervious TC Data: Flow type. Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method. SCS CN Number SCS Abs 0 20 Intv: 10 00 min TC 0 03 hrs 0 04 hrs 0 0377 ac 0 1441 ac 0.0234 ac 0 0459 ac Length Slope Coeff• Travel Time 6 00 ft 2 00% 0 2400 1 90 min Length: Slope. Coeff Travel Time 173.00 ft 2.28% 27 0000 0 71 min 18 50 ft 2 00% 0.0110 0.40 min 100.00 ft 0.50% 21.0000 1.12 min 5.00 ft 2.00% 0.0110 0.14 min ADDHYD [BSN G1] AS [6 mo] [BSN G2] AS [6 mo] TO [BSN G1 +BSN G2] Peak Flow: 0.1169 cfs Peak Time: 7.83 hrs Hyd Vol: 1716.22 cf - 0.0394 acft ADDHYD [BSN G1] AS [2 yr] [BSN G2] AS [2 yr] TO [BSN G1 +BSN G2] Peak Flow• 0.1997 cfs Peak Time• 7 83 hrs Hyd Vol: 2964 38 cf - 0 0681 acft ADDHYD [BSN G1] AS [10 yr] [BSN G2] AS [10 yr] TO [BSN G1 +BSN G2] Peak Flow. 0.3240 cfs Peak Time 7 83 hrs Hyd Vol• 4782 34 cf - 0.1098 acft ADDHYD [BSN G1] AS [25 yr] [BSN G2] AS [25 yr] TO [BSN G1 +BSN G2] Peak Flow: 0.3876 cfs Peak Time 7 83 hrs Hyd Vol: 5713 03 cf - 0 1312 acft ADDHYD [BSN G1] AS [50 yr] [BSN G2] AS [50 yr] TO [BSN G1 +BSN G2] Peak Flow 0.4197 cfs Peak Time. 7 83 hrs Hyd Vol: 6181.85 cf - 0.1419 acft ADDHYD [BSN G1] AS [100 yr] [BSN G2] AS [100 yr] TO [BSN G1 +BSN G2] Peak Flow 0 4520 cfs Peak Time. 7.83 hrs Hyd Vol 6652 71 cf - 0 1527 acft ADDHYD [BSN G3] AS [6 mo] [BSN G4] AS [6 mo] TO [BSN G3 +BSN G4] Peak Flow: 0.1281 cfs Peak Time. 7 83 hrs Hyd Vol. 1802.40 cf - 0.0414 acft ADDHYD [BSN G3] AS [2 yr] [BSN G4] AS [2 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 2159 cfs Peak Time: 7 83 hrs Hyd Vol• 3066.86 cf - 0 0704 acft ADDHYD [BSN G3] AS (10 yr] [BSN G4) AS [10 yr] TO [BSN G3 +BSN G4] Peak Flow: 0.3427 cfs Peak Time• 7 83 hrs Hyd Vol 4879 12 cf - 0 1120 acft ADDHYD [BSN G3] AS [25 yr] [BSN G4] AS [25 yr] TO [BSN G3 +BSN G4) Peak Flow. 0.4067 cfs Peak Time• 7 83 hrs Hyd Vol 5799 30 cf - 0 1331 acft ADDHYD [BSN G3] AS (50 yr] [BSN G4] AS [50 yr] TO [BSN G3 +BSN G4] Peak Flow 0 4389 cfs Peak Time: 7 83 hrs Hyd Vol: 6261.49 cf - 0.1437 acft ADDHYD [BSN G3] AS [100 yr] [BSN G4] AS [100 yr] TO [BSN G3 +BSN G4] Peak Flow 0 4711 cfs Peak Time. 7 83 hrs Hyd Vol: 6724.85 cf - 0 1544 acft ADDHYD [BSN G1 +BSN G2] AS [6 mo] [BSN G3 +BSN G4] AS [6 mo] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow 0.2450 cfs Peak Time: 7 83 hrs Hyd Vol: 3518 62 cf - 0.0808 acft ADDHYD [BSN G1 +BSN G2] AS [2 yr] [BSN G3 +BSN G4] AS (2 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow. 0.4156 cfs Peak Time. 7 83 hrs Hyd Vol: 6031.24 cf - 0.1802 acft ADDHYD [BSN G1 +BSN G2] AS [10 yr] [BSN G3 +BSN G4] AS [10 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow• 0.6667 cfs Peak Time: 7 83 hrs Hyd Vol: 9661.46 cf - 0.2218 acft ADDHYD [BSN G1 +BSN G2] AS [25 yr] [BSN G3 +BSN G4] AS [25 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow 0.7943 cfs Peak Time 7.83 hrs Hyd Vol: 11512.33 cf - 0.2749 acft ADDHYD [BSN G1 +BSN G2] AS [50 yr] [BSN G3 +BSN G4] AS [50 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow 0.8586 cfs Peak Time• 7.83 hrs Hyd Vol: 12443.34 cf - 0.2856 acft ADDHYD [BSN G1 +BSN G2] AS [100 yr] [BSN G3 +BSN G4] AS [100 yr] TO [BSN G1 + BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 9231 cfs Peak Time 7 83 hrs Hyd Vol 13377 56 cf - 0 3071 acft Hydrograph ID: BASIN G Area 1 0712 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 0 9231 cfs Peak Time 7.83 hrs Hyd Vol: 0.3071 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 3581 16 33 0 1233 0 83 0 0126 8.83 0 3082 16 50 0 1233 1 00 0 0225 9 00 0 3195 16.67 0 1234 1 17 0 0338 9 17 0 2685 16 83 0 1234 1 33 0 0443 9 33 0 2327 17 00 0 1235 1 50 0 0509 9 50 0 2410 17 17 0 1184 1 67 0 0593 9 67 0 2244 17 33 0 1146 1 83 0 0665 9 83 0 2143 17 50 0 1155 2 00 0 0707 10.00 0 2168 17 67 0 1153 2 17 0 0777 10 17 0 2017 17 83 0 1155 2 33 0 0836 10 33 0 1909 18 00 0 1155 2 50 0 0863 10 50 0.1935 18 17 0 1104 2 67 0 0891 10 67 0 1831 18 33 0 1066 2 83 0 0914 10 83 0 1760 18 50 0 1075 3 00 0 0934 11 00 0 1778 18 67 0 1073 3 17 0 0951 11.17 0.1725 18 83 0 1074 3 33 0 0967 11 33 0 1690 19 00 0 1074 3 50 0 0980 11 50 0 1700 19 17 0 1023 3 67 0 1030 11 67 0 1649 19 33 0 0985 3 83 0 1072 11 83 0 1613 19 50 0 0994 4 00 0 1077 12 00 0 1623 19 67 0 0992 4.17 0 1165 12 17 0 1572 19 83 0 0993 4 33 0 1236 12 33 0 1536 20 00 0.0993 4 50 0 1233 12 50 0 1545 20 17 0 0993 4 67 0 1324 12 67 0 1494 20 33 0 0994 4 83 0.1396 12 83 0 1458 20 50 0 0994 5 00 0.1400 13 00 0 1467 20 67 0 0994 5 17 0 1498 13 17 0 1465 20 83 0 0994 5 33 0 1575 13 33 0 1467 21 00 0 0994 5 50 0 1577 13.50 0 1468 21 17 0 0995 5 67 0 1677 13 67 0 1418 21 33 0 0995 5 83 0 1755 13 83 0 1381 21 50 0 0995 6 00 0 1755 14 00 0 1390 21 67 0 0995 6 17 0 1943 14 17 0 1388 21 83 0 0996 6 33 0 2091 14 33 0 1390 22 00 0 0996 6 50 0 2079 14 50 0.1390 22 17 0 0945 6 67 0 2364 14 67 0 1341 22 33 0 0906 6 83 0 2584 14 83 0 1303 22 50 0 0915 7 00 0 2560 15 00 0 1312 22 67 0 0913 7 17 0 2903 15 17 0 1311 22 83 0 0914 7 33 0 3163 15 33 0 1312 23 00 0 0914 7 50 0 3133 15 50 0 1312 23 17 0 0914 7 67 0 6550 15 67 0 1262 23 33 0 0914 7 83 0 9231 15 83 0 1225 23 50 0 0915 8 00 0 8788 16 00 0 1234 23 67 0 0915 8 17 0 6131 16 17 0 1232 23 83 0.0915 8 33 0 3922 16 33 0 1233 24.00 0 0915 8 50 0 4432 16 50 0 1233 24 17 0 0348 Hydrograph ID: BASIN G Area: 1.0712 ac Hyd Int 10 00 min Base Flow Peak Flow• 0.9231 cfs Peak Time 7 83 hrs Hyd Vol 0 3071 acft MOVEHYD [BASIN G] TO [BASIN G - 6 mo] AS [6 mo] Peak Flow: 0 2450 cfs Peak Time 7 83 hrs Hyd Vol. 3518.62 cf - 0 0808 acft MOVEHYD [BASIN G) TO [BASIN G - 100 yr) AS [100 yr] Peak Flow 0.9231 cfs Peak Time: 7 83 hrs Hyd Vol• 13377 56 cf - 0.3071 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifices Start EI Max EI Increment 327 0000 ft 333 0000 ft 0.10 Infil: 10.00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE G Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Routing Method• Travel Time Translation Hyd params By 0 0250 Mannings Formula Length Slope Entrance Loss 160.0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3.0000 ft 2.OOh:1 v 2.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY G 0 0000 ft 0.0000 ft Conduit Cons traints: Mm Vel Max Vel Min Cov Min Slope Max Slope Mm drop 0 5000 ft 1 0000 ft 3 0000 ft 0 5000 ft 1 0000 ft 0.0000 ft In/Exfd Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 0000 ac 0.0000 cf 0 0000 cf 0 0000 ft/s 0.0000 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0 000000 ft 0.0000 ft ROUTEHYD [BASIN G - 6 MO] THRU [BIOSWALE G] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE G 1 0712 0 2450 ---- 1 00 0 0673 Ditch 0 5603 ----- BASIN G ROUTEHYD [BASIN G - 100 YR] THRU [BIOSWALE G] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE G 1 0712 0.9231 ---- 1 00 0 1455 Ditch 0.7811 ----- BASIN G Node ID: INFILTRATION G Desc. Manhole structure Start EI. 333.0000 ft Max EI. 334.0000 ft Contrib Basin: Contrib Hyd Length Width Void Ratlo 160 0000 ft 10.0000 ft 39.00 Node ID: BASIN G RPL Desc: Manhole structure Start EI: 333 0000 ft Max EI 334 0000 ft Contrib Basin Contrib Hyd. Storage Id' INFILTRATION G Discharge Id. INFILTRATION RLPCOMPUTE [BASIN G RPL] SUMMARY 100 YR MatchO=PeakO= 0.9231 cfs Peak Out O 0 3141 cfs -Peak Stg: 333.90 ft - Active Vol 1314 99 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 e PROJECT REPORT Project Name: Tahoma Terra_BASIN -G Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin G Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 DEVELOPED LAND USE Basin Basin G Flows To Bio-Infiltration Swale G Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.64 IMPERVIOUS: 2.07 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale G Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 160ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.021 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 332.5 0.037 0.000 0.000 0.000 332.6 0.039 0.003 0.000 0.370 \ 332.7 0.040 0.006 0.000 0.370 \ 332.7 332.8 0.042 0.044 0.009 0.013 0.000 0.000 0.370 0.370 ~- a.~, J y ') 'G ~ J ~ `~~~' ~gEPH D,~~ I ~~~oF was~1cT~OQ~ q ~ 34S'_S tl ~~ FCIS1 E~~ ~`C' ~ S ~ ,~~a~ ~~-ZZ~O~ x~ mra Fx~RFS• ~~-n- 332.9 0.046 0.016 0.000 0.370 333.0 0.047 0.020 0.000 0.370 333.0 0.049 0.023 0.411 0.370 333.1 0.051 0.027 1.873 0.370 333.2 0.053 0.031 3.920 0.370 333.3 0.055 0.036 6.416 0.370 333.4 0.057 0.040 9.292 0.370 333.4 0.058 0.044 12.50 0.370 333.5 0.060 0.049 16.01 0.370 333.6 0.062 0.054 19.81 0.370 333.7 0.064 0.059 23.86 0.370 333.7 0.066 0.064 28.15 0.370 333.8 0.068 0.069 32.67 0.370 333.9 0.069 0.074 37.42 0.370 334.0 0.071 0.080 42.37 0.370 334.1 0.073 0.085 47.53 0.370 334.1 0.075 0.091 52.88 0.370 334.2 0.077 0.097 58.41 0.370 334.3 0.079 0.103 64.13 0.370 334.4 0.081 0.109 70.02 0.370 334.4 0.083 0.116 76.08 0.370 334.5 0.085 0.122 82.31 0.370 334.6 0.086 0.129 88.70 0.370 334.7 0.088 0.136 95.24 0.370 334.8 0.090 0.142 101.9 0.370 334.8 0.092 0.150 108.8 0.370 334.9 0.094 0.157 115.8 0.370 335.0 0.096 0.164 122.9 0.370 335.1 0.098 0.172 130.2 0.370 335.1 0.100 0.179 137.6 0.370 335.2 0.102 0.187 145.2 0.370 335.3 0.104 0.195 152.9 0.370 335.4 0.106 0.204 160.7 0.370 335.5 0.108 0.212 168.6 0.370 335.5 0.110 0.220 176.7 0.370 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year ANALYSIS RESULTS Periods for Predeveloped Flow(cfs) 0.519477 0.632449 0.702504 0.787089 0.847849 0.907062 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.519477 5 year 0.632449 10 year 0.702504 25 year 0.787089 50 year 0.847849 100 year 0.907062 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(efs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.490 0.062 1957 0.792 0.441 1958 0.455 0.000 1959 0.532 0.005 1960 0.585 0.178 1961 0.389 0.000 1962 0.420 0.000 1963 0.843 0.274 1964 0.612 0.181 1965 0.574 0.222 1966 0.404 0.000 1967 0.493 0.056 1968 0.387 0.000 1969 0.383 0.000 1970 0.382 0.000 1971 0.475 0.022 1972 0.566 0.194 1973 0.450 0.000 1974 0.524 0.122 1975 0.454 0.016 1976 0.522 0.059 1977 0.661 0.155 1978 0.562 0.113 1979 0.669 0.086 1980 0.501 0.000 1981 0.573 0.187 1982 0.663 0.182 1983 0.710 0.277 1984 0.433 0.000 1985 0.501 0.000 1986 0.557 0.161 1987 0.597 0.240 1988 0.332 0.000 1989 0.397 0.000 1990 0.782 0.413 1991 0.789 0.411 1992 0.488 0.033 1993 0.357 0.000 1994 0.397 0.000 1995 0.575 0.220 1996 0.584 0.199 1997 0.470 0.053 1998 0.659 0.170 1999 0.566 0.168 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.7921 0.4131 2 0.7895 0.4111 3 0.7816 0.2767 4 0.7096 0.2744 5 0.6685 0.2400 6 0.6629 0.2222 7 0.6611 0.2200 8 0.6588 0.1993 9 0.6121 0.1942 10 0.5968 0.1868 11 0.5852 0.1822 12 0.5837 0.1813 13 0.5751 0.1781 14 0.5742 0.1700 15 0.5735 0.1677 16 0.5659 0.1608 17 0.5657 0.1550 18 0.5616 0.1216 19 0.5570 0.1135 20 0.5317 0.0861 21 0.5236 0.0616 22 0.5224 0.0587 23 0.5014 0.0563 24 0.5007 0.0532 25 0.4933 0.0332 26 0.4899 0.0224 27 0.4877 0.0161 28 0.4750 0.0054 29 0.4703 0.0000 30 0.4551 0.0000 31 0.4536 0.0000 32 0.4497 0.0000 33 0.4328 0.0000 34 0.4200 0.0000 35 0.4044 0.0000 36 0.3971 0.0000 37 0.3970 0.0000 38 0.3894 0.0000 39 0.3875 0.0000 40 0.3829 0.0000 41 0.3824 0.0000 42 0.3573 0.0000 43 0.3318 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.2597 1051 11 1.0 Pass 0.2657 981 9 .0 Pass 0.2716 913 8 .0 Pass 0.2776 842 5 .0 Pass 0.2835 788 5 .0 Pass 0.2894 719 5 .0 Pass 0.2954 669 5 .0 Pass 0.3013 624 5 .0 Pass 0.3073 583 5 .0 Pass 0.3132 535 5 .0 Pass 0.3191 498 5 1.0 Pass 0.3251 456 5 1.0 Pass 0.3310 428 5 1.0 Pass 0.3370 399 5 1.0 Pass 0.3429 365 5 1.0 Pass 0.3488 340 5 1.0 Pass 0.3548 315 4 1.0 Pass 0.3607 297 4 1.0 Pass 0.3667 278 4 1.0 Pass 0.3726 255 4 1.0 Pass 0.3785 241 4 1.0 Pass 0.3845 223 4 1.0 Pass 0.3904 202 4 1.0 Pass 0.3964 190 4 2.0 Pass 0.4023 174 4 2.0 Pass 0.4083 167 3 1.0 Pass 0.4142 161 1 .0 Pass 0.4201 154 1 .0 Pass 0.4261 147 1 .0 Pass 0.4320 142 1 .0 Pass 0.4380 138 1 .0 Pass 0.4439 137 0 .0 Pass 0.4498 124 0 .0 Pass 0.4558 117 0 .0 Pass 0.4617 108 0 .0 Pass 0.4677 104 0 .0 Pass 0.4736 97 0 .0 Pass 0.4795 91 0 .0 Pass 0.4855 87 0 .0 Pass 0.4914 82 0 .0 Pass 0.4974 74 0 .0 Pass 0.5033 67 0 .0 Pass 0.5092 66 0 .0 Pass 0.5'152 60 0 .0 Pass 0.5211 58 0 .0 Pass 0.5271 54 0 .0 Pass 0.5330 50 0 .0 Pass 0.5389 46 0 .0 Pass 0.5449 46 0 .0 Pass 0.5508 41 0 .0 Pass 0.5568 38 0 .0 Pass 0.5627 36 0 .0 Pass 0.5686 34 0 .0 Pass 0.5746 29 0 .0 Pass 0.5805 26 0 .0 Pass 0.5865 23 0 .0 Pass 0.5924 23 0 .0 Pass 0.5983 19 0 .0 Pass 0.6043 19 0 .0 Pass 0.6102 18 0 .0 Pass 0.6162 16 0 .0 Pass 0.6221 16 0 .0 Pass 0.6281 16 0 .0 Pass 0.6340 15 0 .0 Pass 0.6399 14 0 .0 Pass 0.6459 12 0 .0 Pass 0.6518 12 0 .0 Pass 0.6578 12 0 .0 Pass 0.6637 9 0 .0 Pass 0.6696 8 0 .0 Pass 0.6756 8 0 .0 Pass 0.6815 8 0 .0 Pass 0.6875 8 0 .0 Pass 0.6934 7 0 .0 Pass 0.6993 6 0 .0 Pass 0.7053 6 0 .0 Pass 0.7112 5 0 .0 Pass 0.7172 5 0 .0 Pass 0.7231 5 0 .0 Pass 0.7290 5 0 .0 Pass 0.7350 5 0 .0 Pass 0.7409 5 0 .0 Pass 0.7469 5 0 .0 Pass 0.7528 5 0 .0 Pass 0.7587 5 0 .0 Pass 0.7647 5 0 .0 Pass 0.7706 5 0 .0 Pass 0.7766 5 0 .0 Pass 0.7825 4 0 .0 Pass 0.7884 4 0 .0 Pass 0.7944 1 0 .0 Pass 0.8003 1 0 .0 Pass 0.8063 1 0 .0 Pass 0.8122 1 0 .0 Pass 0.8181 1 0 .0 Pass 0.8241 1 0 .0 Pass 0.8300 1 0 .0 Pass 0.8360 1 0 .0 Pass 0.8419 1 0 .0 Pass 0.8478 0 0 .0 Pass Water Quality BMP Flow and volume. On-line facility volume: 0.138 acre-feet On-line facility target flow: 0.4 c£s. Adjusted for 15 min: 0.46 cfs. Off-line facility target flow: 0.2 cfs. Adjusted for 15 min: 0.22 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 10.0 ~xxxxxxxxxkx~~xkrxxxx „-.` ~ 1.0 w,w ~ ~~e~c`'"~'~~oa R$~f elnp~d ,~ 10E-7 x Deuetopec~piitigated u ~ ~ ~ _~, ~~ toE-2 7' 10 `20 ~~~dO=50 BO 70 ~~ 9U 94 C~mulatrve,~Pr~b`abilit~ ~E Rtt : fCO~I ~C~ 1C~! ~ .509 ~ o Pr~de~elope~i a0 .291 ;= ' r) ' , _ 0 x D~+~1~ ed u~~ F~c~lp~~ r r j '~7 25 ~ 93S _~. .o.........R ,P~.~ .~~ ,..........~u.. ~u..u~.,.~u.. w u.u- ~~ 19 ,3463 ' ~ ~ ~ ~ ~ 0 ~7 ~... ,~,w,~,,, ~,~,,,~„ ~,,,.,,,~ ,~ ,_,~.... 5 X117 ;, ~ ~ ~ ~ ~ `~' 9.~9 -__. --- ~~_ ~_~ ....._..............._. ~. }~ ~ °~ ~~~~ _ ,, ~ P ~ 0.13 -~_ _ ~ .~_ _ ~ _ _W~_~ _ r ~'~'° (~,- ~~-~ € ice,? _ .. iii ~ ___, ..~. 10E.5 ~ 10E•4 f 10E•_; 1~E-~ 10E•1, 1 10 `''Percent ~xc~edEn (early Peaks for developed W/O Pond 1'f,Ait FLOW (~? 109 11 38 , i~x3~ t ' j ~{s~ $9 ~ ~ ~~ .'r""` ~ ~ { ~ ~ 25 ~ x.045 ~."""_ 1 3 '~ i~~;~~ ri' ~ > £ a s } ~ / ~ £ i 10 2',6$1 `~°` , 5 .1.518 ;, C ~ t'Y~ ©.FM:'*.1'""J'.T:JV'*'~'i"..~'dE~'bt'1-':'~!'d`~'N _m.:.:"+'.-~»_~~_..'.t~y Duration Graph Yearly Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart CLEARHIS BSN G1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G1 0 08 7 83 BSN G1 0 13 7.83 BSN G1 0.22 7 83 BSN G1 0 26 7 83 BSN G1 0 28 7 83 BSN G1 0 30 7 83 yr Drainage Area: BSN G1 Hyd Method. SBUH Hyd Peak Factor 484.00 Storm Dur. 24.00 hrs Area CN Pervious 0.0841 ac 78.00 Impervious 0.2862 ac 98 00 Total 0.3703 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type• Description. Sheet Across Planter Strip Impervious TC Data: Flow type Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Driveway BSN G2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN G2 0 04 7 83 BSN G2 0 07 7 83 BSN G2 0 11 7 83 BSN G2 0 13 7 83 BSN G2 0 14 7 83 BSN G2 0 15 7 83 yr Drainage Area: BSN G2 Hyd Method: SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.0320 ac 78.00 Impervious 0.1423 ac 98.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0264 0 37 SBUH/SCS TYPE1A 6 mo 0 0457 0 37 SBUH/SCS TYPE1A 2 yr 0 0739 0 37 SBUH/SCS TYPEIA 10 yr 0 0884 0 37 SBUH/SCS TYPE1A 25 yr 0 0957 0 37 SBUH/SCS TYPE1A 50 yr 0.1030 0 37 SBUH/SCS TYPE1A 100 Loss Method: SCS CN Number SCS Abs. 0.20 Intv. 10 00 min TC 0.03 hrs 0.07 hrs 0 0841 ac 0.1714 ac 01148 ac Length: Slope: Coeff: Travel Time 6 00 ft 2.00% 0.2400 1 90 min Length: Slope Coeff: Travel Time 444.00 ft 1.77% 27.0000 2.06 min 18.50 ft 2.00% 0.0110 0.40 min 100.00 ft 0.50% 21 0000 1.12 min 20.00 ft 2.00% 0.0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0130 0 17 SBUH/SCS TYPEIA 6 mo 0 0223 0 17 SBUH/SCS TYPEIA 2 yr 0 0358 0 17 SBUH/SCS TYPE1A 10 yr 0 0427 0 17 SBUH/SCS TYPE1A 25 yr 0 0462 0 17 SBUH/SCS TYPE1A 50 yr 0 0497 0 17 SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs: 0.20 Intv: 10.00 min TC 0.03 hrs 0 06 hrs Total 0 1743 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0.0320 ac Impervious CN Data: ROADWAY 98.00 0.0849 ac DRIVEWAY 98 00 0.0574 ac Pervious TC Data: Flow type: Description: Length: Slope: Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description: Length: Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 198.00 ft 0.50% 27.0000 2.30 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 min Channel Through Strom Water Pipe 50.00 ft 0.50% 21.0000 0.56 min Sheet Across Driveway 20.00 ft 2.00% 0.0110 0.42 min BSN G3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event (cfs) (hrs) (ac-ft) ac /Loss BSN G3 0.07 7 83 0 0220 0 28 SBUH/SCS TYPE1A 6 mo BSN G3 0 11 7 83 0 0373 0.28 SBUH/SCS TYPE1A 2 yr BSN G3 0 18 7 83 0 0592 0 28 SBUH/SCS TYPE1A 10 yr BSN G3 0 21 7 83 0 0703 0 28 SBUH/SCS TYPEIA 25 yr BSN G3 0 23 7 83 0 0759 0 28 SBUH/SCS TYPE1A 50 yr BSN G3 0 25 7 83 0 0815 0.28 SBUH/SCS TYPE1A 100 yr Drainage Area: BSN G3 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0318 ac 78.00 Impervious 0 2437 ac 98.00 Total 0.2755 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 Impervious CN Data: ROADWAY 98.00 DRIVEWAY 98.00 SIDEWALK 98.00 Pervious TC Data: Flow type' Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method• SCS CN Number SCS Abs: 0 20 Intv. 10.00 mm TC 0 03 hrs 0.05 hrs 0.0318 ac 0 1629 ac 0.0574 ac 0.0234 ac Length: Slope: Coeff• Travel Time 6.00 ft 2 00% 0.2400 1.90 mm Length. Slope: Coeff: Trave- Time 194.00 ft 0.54% 27.0000 1 63 min 18.50 ft 2.00% 0.0110 0.40 min 100 00 ft 0 50% 21.0000 1.12 min 5.00 ft 2 00% 0.0110 0.14 min BSN G4 Event Summary: BasinlD Peak Q Event (cfs) BSN G4 0 06 BSN G4 0 10 BSN G4 0 16 BSN G4 0 19 BSN G4 0 21 BSN G4 0 22 yr Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 7 83 0 0194 0 25 SBUH/SCS TYPE1A 6 mo 7 83 0 0331 0 25 SBUH/SCS TYPE1A 2 yr 7 83 0 0528 0 25 SBUH/SCS TYPE1A 10 yr 7 83 0 0628 0 25 SBUH/SCS TYPEIA 25 yr 7 83 0 0678 0 25 SBUH/SCS TYPEIA 50 yr 7 83 0 0729 0 25 SBUH/SCS TYPE1A 100 Drainage Area: BSN G4 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur• 24.00 hrs Area CN Pervious 0 0377 ac 78.00 Impervious 0.2134 ac 98 00 Total 0.2511 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type. Descnption• Sheet Across Planter Stnp Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Loss Method: SCS CN Number SCS Abs: 0.20 Intv• 10 00 min TC 0.03 hrs 0.04 hrs 0 0377 ac 0.1441 ac 0.0234 ac 0.0459 ac Length• Slope: Coeff. Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length Slope: Coeff: Travel Time 173.00 ft 2.28% 27.0000 0 71 min 18.50 ft 2 00% 0.0110 0.40 mm 100.00 ft 0.50% 21.0000 1.12 min 5.00 ft 2.00% 0.0110 0.14 min ADDHYD [BSN G1] AS [6 mo] [BSN G2] AS [6 mo] TO [BSN G1 +BSN G2] Peak Flow 0 1169 cfs Peak Time• 7.83 hrs Hyd Vol: 1716 22 cf - 0.0394 acft ADDHYD [BSN G1] AS [2 yr] [BSN G2] AS [2 yr] TO [BSN G1 +BSN G2] Peak Flow: 0.1997 cfs Peak Time: 7.83 hrs Hyd Vol: 2964.38 cf - 0.0681 acft ADDHYD [BSN G1] AS [10 yr] [BSN G2] AS [10 yr] TO [BSN G1 +BSN G2] Peak Flow: 0.3240 cfs Peak Time: 7.83 hrs Hyd Vol: 4782.34 cf - 0.1098 acft ADDHYD [BSN G1] AS [25 yr] [BSN G2] AS [25 yr] TO [BSN G1 +BSN G2] Peak Flow: 0.3876 cfs Peak Time: 7 83 hrs Hyd Vol: 5713 03 cf - 0.1312 acft ADDHYD [BSN G1] AS [50 yr] [BSN G2] AS [50 yr] TO [BSN G1 +BSN G2] Peak Flow. 0.4197 cfs Peak Time: 7 83 hrs Hyd Vol: 6181 85 cf - 0 1419 acft ADDHYD [BSN G1] AS [100 yr] [BSN G2] AS [100 yr] TO [BSN G1 +BSN G2] Peak Flow• 0.4520 cfs Peak Time. 7 83 hrs Hyd Vol 6652.71 cf - 0.1527 acft ADDHYD [BSN G3] AS [6 mo] [BSN G4] AS [6 mo] TO [BSN G3 +BSN G4] Peak Flow• 0.1281 cfs Peak Time 7.83 hrs Hyd Vol: 1802.40 cf - 0.0414 acft ADDHYD [BSN G3] AS (2 yr] [BSN G4] AS (2 yr] TO [BSN G3 +BSN G4] Peak Flow: 0.2159 cfs Peak Time• 7.83 hrs Hyd Vol• 3066 86 cf - 0.0704 acft ADDHYD [BSN G3] AS [10 yr] [BSN G4] AS [10 yr] TO [BSN G3 +BSN G4] Peak Flow• 0.3427 cfs Peak Time 7.83 hrs Hyd Vol: 4879.12 cf - 0.1120 acft ADDHYD [BSN G3] AS [25 yr] [BSN G4] AS [25 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 4067 cfs Peak Time 7.83 hrs Hyd Vol• 5799 30 cf - 0.1331 acft ADDHYD [BSN G3] AS [50 yr] [BSN G4] AS [50 yr] TO [BSN G3 +BSN G4] Peak Flow• 0.4389 cfs Peak Time: 7.83 hrs Hyd Vol: 6261.49 cf - 0 1437 acft ADDHYD [BSN G3] AS [100 yr] [BSN G4] AS [100 yr] TO [BSN G3 +BSN G4] Peak Flow: 0 4711 cfs Peak Time 7.83 hrs Hyd Vol: 6724 85 cf - 0.1544 acft ADDHYD [BSN G1 +BSN G2] AS [6 mo] [BSN G3 +BSN G4] AS [6 mo] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0.2450 cfs Peak Time: 7.83 hrs Hyd Vol: 3518.62 cf - 0.0808 acft ADDHYD [BSN G1 +BSN G2] AS [2 yr] [BSN G3 +BSN G4] AS [2 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow. 0.4156 cfs Peak Time: 7.83 hrs Hyd Vol: 6031.24 cf - 0.1802 acft ADDHYD [BSN G1 +BSN G2] AS [10 yr] [BSN G3 +BSN G4] AS [10 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow. 0.6667 cfs Peak Time: 7.83 hrs Hyd Vol: 9661.46 cf - 0.2218 acft ADDHYD [BSN G1 +BSN G2] AS [25 yr] [BSN G3 +BSN G4] AS [25 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 7943 cfs Peak Time• 7.83 hrs Hyd Vol: 11512.33 cf - 0.2749 acft ADDHYD [BSN G1 +BSN G2] AS [50 yr] [BSN G3 +BSN G4] AS [50 yr] TO [BSN G1 +BSN G2 +BSN G3 +BSN G4] Peak Flow: 0 8586 cfs Peak Time: 7.83 hrs Hyd Vol: 12443.34 cf - 0.2856 acft ADDHYD (BSN G1 +BSN G2] AS [100 yr] [BSN G3 +BSN G4] AS [100 yr] TO [BSN G1 + BSN G2 +BSN G3 +BSN G4] Peak Flow• 0.9231 cfs Peak Time: 7.83 hrs Hyd Vol: 13377.56 cf - 0.3071 acft Hydrograph ID: BASIN G Area: 1.0712 ac Hyd Int: 10 00 min Base Flow. Peak Flow: 0 9231 cfs Peak Time: 7.83 hrs Hyd Vol• 0 3071 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 3581 16 33 0 1233 0 83 0 0126 8 83 0 3082 16 50 0.1233 1.00 0 0225 9 00 0 3195 16 67 0 1234 1 17 0 0338 9 17 0 2685 16 83 0 1234 1 33 0 0443 9 33 0 2327 17 00 0 1235 1 50 0 0509 9 50 0 2410 17 17 0 1184 1 67 0 0593 9 67 0 2244 17 33 0 1146 1 83 0 0665 9 83 0 2143 17 50 0 1155 2 00 0 0707 10 00 0 2168 17 67 0 1153 2 17 0 0777 10 17 0 2017 17 83 0 1155 2 33 0 0836 10 33 0 1909 18 00 0 1155 2 50 0 0863 10.50 0.1935 18 17 0 1104 2.67 0 0891 10 67 0 1831 18 33 0 1066 2 83 0 0914 10 83 0 1760 18 50 0 1075 3 00 0 0934 11 00 0 1778 18 67 0 1073 3 17 0 0951 11 17 0.1725 18.83 0 1074 3 33 0 0967 11 33 0 1690 19 00 0.1074 3 50 0 0980 11 50 0 1700 19 17 0 1023 3 67 0 1030 11 67 0 1649 19 33 0 0985 3 83 0 1072 11.83 0 1613 19 50 0 0994 4 00 0 1077 12 00 0.1623 19 67 0 0992 4 17 0 1165 12 17 0 1572 19 83 0 0993 4 33 0 1236 12 33 0 1536 20 00 0 0993 4 50 0.1233 12 50 0 1545 20 17 0 0993 4 67 0 1324 12 67 0 1494 20 33 0 0994 4 83 0 1396 12 83 0.1458 20 50 0 0994 5 00 0 1400 13.00 0 1467 20 67 0.0994 5 17 0 1498 13 17 0 1465 20 83 0 0994 5 33 0 1575 13 33 0 1467 21 00 0 0994 5 50 0 1577 13 50 0 1468 21 17 0 0995 5 67 0 1677 13 67 0 1418 21.33 0 0995 5 83 0 1755 13.83 0 1381 21 50 0 0995 6 00 0 1755 14 00 0 1390 21 67 0 0995 6 17 0 1943 14 17 0.1388 21 83 0 0996 6 33 0 2091 14.33 0 1390 22 00 0 0996 6 50 0 2079 14 50 0 1390 22.17 0 0945 6 67 0 2364 14 67 0 1341 22 33 0 0906 6 83 0 2584 14 83 0 1303 22 50 0 0915 7 00 0 2560 15 00 0 1312 22.67 0.0913 7 17 0 2903 15.17 0 1311 22 83 0.0914 7 33 0.3163 15 33 0 1312 23 00 0 0914 7 50 0 3133 15 50 0 1312 23.17 0 0914 7 67 0 6550 15.67 0 1262 23 33 0 0914 7 83 0 9231 15 83 0 1225 23 50 0 0915 8 00 0 8788 16 00 0 1234 23.67 0 0915 8 17 0 6131 16.17 0 1232 23 83 0 0915 8 33 0 3922 16 33 0 1233 24 00 0 0915 8 50 0 4432 16 50 0 1233 24.17 0 0348 Hydrograph ID: BASIN G Area' 1.0712 ac Hyd Int: 10.00 min Base Flow: Peak Flow: 0 9231 cfs Peak Time: 7.83 hrs Hyd Vol: 0.3071 acft MOVEHYD [BASIN G] TO [BASIN G - 6 mo] AS [6 mo] Peak Flow: 0.2450 cfs Peak Time: 7.83 hrs Hyd Vol: 3518.62 cf - 0.0808 acft MOVEHYD [BASIN G] TO [BASIN G - 100 yr] AS [100 yr] Peak Flow: 0.9231 cfs Peak Time 7 83 hrs Hyd Vol• 13377.56 cf - 0.3071 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifices Start EI Max EI Increment 327.0000 ft 333.0000 ft 0.10 Infil: 10 00 in/hr Multiplier: 1 00 Reach ID: BIOSWALE G Section Properties: Shape Ditch Size Material Manrnngs n Corr Metal -normal Routing Method: Travel Time Translation Hyd params By 0 0250 Mannings Formula Length Slope Entrance Loss 160 0000 ft 1 00 Width Bank Hgt ss1 ss2 10 0000 ft 3.0000 ft 2 OOh:1v 2.OOh~1v Up Node Dn Node Up Invert Dn Invert DUMMY G 0 0000 ft 0 0000 ft Conduit Cons traints: Mln Vel Max Vel Mln Cov Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3 0000 ft 0 5000 ft 1 0000 ft 0 0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.000OIn/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.0000 ac 0.0000 cf 0.0000 cf 0 0000 ft/s 0.0000 ft Ent Loss Exlt Loss Frlct Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0.0000 ft ROUTEHYD [BASIN G - 6 MO] THRU [BIOSWALE G] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE G 1 0712 0 2450 ---- 1 00 0 0673 Ditch 0.5603 ----- BASIN G ROUTEHYD [BASIN G - '100 YR] THRU [BIOSWALE G] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE G 1.0712 0 9231 ---- 1 00 0.1455 Ditch 0 7811 ----- BASIN G Node ID: INFILTRATION G Desc: Manhole structure Start EI: 333.0000 ft Max EI: 334 0000 ft Contrlb Basin: Contrib Hyd: Length Width Vold Ratio 160.0000 ft 10.0000 ft 39.00 Node ID: BASIN G RPL Desc: Manhole structure Start EI 333.0000 ft Max EI: 334.0000 ft Contrib Basin: Contrlb Hyd: Storage Id: INFILTRATION G Discharge Id. INFILTRATION RLPCOMPUTE [BASIN G RPL] SUMMARY 100 YR MatchO=PeakQ= 0 9231 cfs Peak Out Q 0 3141 cfs -Peak Stg: 333 90 ft - Actlve Vol. 1314 99 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -F Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin F Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 DEVELOPED LAND USE Basin Basin F Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale F Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. nimana~nnc llepth: aft. Bottom Length: 70ft. Bottom Wa.dth loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.009 acre-ft. Discharge Structure Ra.ser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 336.5 0.016 0.000 0.000 0.000 336.6 0.017 0.001 0.000 0.162 336.7 0.018 0.003 0.000 0.162 336.7 0.019 0.004 0.000 0.162 336.8 0.019 0.006 0.000 0.162 ~~ h ~ ~~ C ~ ~• ~~gEPH ~q~~ ~pPwasy~( ~~ ~`, ~~ co 4 .wAy ~ ~~ ~ ~ 3.t ~, c ~ t~ ~F~~s~ eK~ ~~`,r~ ~~ IXPiRFS• 11-22- P .~ 336.9 0.020 0.007 0.000 0.162 33'7.0 0.021 0.009 0.000 0.162 337.0 0.022 0.010 0.411 0.162 337.1 0.023 0.012 1.873 0.162 337.2 0.024 0.014 3.920 0.162 337.3 0.024 0.016 6.916 0.162 337.4 0.025 0.018 9.292 0.162 337.4 0.026 0.020 12.50 0.162_ 337.5 0.027 0.022 16.01 0.162 337.6 0.028 0.024 19.81 0.162 337.7 0.029 0.026 23.86 0.162 337.7 0.030 0.028 28.]5 0.162 337.8 0.031 0.031 32_.67 0.16?_ 337.9 0.031 0.033 37.42 0.162 338.0 0.032 0.036 92.37 0.162 338.1 0.033 0.038 47.53 0.162 338.1 0.034 0.091 52.88 0.162 338.2 0.035 0.043 58.41 0.162 338.3 0.036 0.046 64.13 0.162 338.4 0.037 0.049 70.02 0.162 338.4 0.038 0.052 76.08 0.162 338.5 0.039 0.055 82.31 0.162 338.6 0.090 0.058 88.70 0.162 338.7 0.041 0.061 95.24 0.162 338.8 0.042 0.064 101.9 0.162 338.8 0.043 0.068 108.8 0.162 338.9 0.044 0.071 115.8 0.162 339.0 0.095 0.074 122.9 0.162 339.1 0.096 0.078 130.2 0.162 339.1 0.047 0.081 137.6 0.162 339.2 0.048 0.085 145.2 0.162 339.3 0.049 0.089 152.9 0.162 339.4 0.050 0.093 160.7 0.162 339.5 0.051 0.097 168.6 0.162 339.5 0.052 0.101 176.7 0.162 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(efs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272471 50 year 0.293769 100 year 0.314542 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272971 50 year 0.293769 100 year 0.314592 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.171 0.000 1957 0.273 0.116 1958 0.157 0.000 1959 0.182_ 0.000 1960 0.201 0.000 1961 0.135 0.000 1962 0.144 0.000 1963 0.294 0.070 1964 0.210 0.001 1965 0.198 0.000 1966 0.139 0.000 1967 0.172 0.000 1968 0.133 0.000 1969 0.131 0.000 1970 0.131 0.000 1971 0.163 0.000 1972 0.200 0.012 1973 0.154 0.000 1974 0.180 0.000 1975 0.156 0.000 1976 0.180 0.000 1977 0.227 0.022 1978 0.193 0.000 1979 0.229 0.000 1980 0.172 0.000 1981 0.197 0.024 1982 0.227 0.000 1983 0.243 0.053 1984 0.149 0.000 1985 0.172 0.000 1986 0.192 0.006 1987 0.210 0.037 1988 0.114 0.000 1989 0.136 0.000 1990 0.269 0.100 1991 0.280 0.106 1992 0.167 0.000 1993 0.123 0.000 1994 0.136 0.000 1995 0.197 0.021 1996 0.200 0.022 1997 0.161 0.000 1998 0.226 0.000 1999 0.194 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2798 0.1057 2 0.2729 0.0999 3 0.2690 0.0696 4 0.2434 0.0533 5 0.2293 0.0366 6 0.2274 0.0244 7 0.2268 0.0229 8 0.2260 0.0217 9 0.2099 0.0207 10 0.2096 0.0121 11 0.2007 0.0057 12 0.2004 0.0007 13 0.2002 0.0005 14 0.1984 0.0000 15 0.1973 0.0000 16 0.1972 0.0000 17 0.1941 0.0000 18 0.1926 0.0000 19 0.1924 0.0000 20 0.1824 0.0000 21 0.1798 0.0000 22~ 0.1796 0.0000 23 0.1720 0.0000 24 0.1720 0.0000 25 0.1718 0.0000 26 0.1709 0.0000 27 0.1673 0.0000 28 0.1632 0.0000 29 0.1613 0.0000 30 0.1565 0.0000 31 0.1556 0.0000 32 0.1542 0.0000 33 0.1488 0.0000 39 0.1990 0.0000 35 0.1387 0.0000 36 0.1362 0.0000 37 0.1362 0.0000 38 0.1347 0.0000 39 0.1332 0.0000 40 0.1314 0.0000 41 0.1312 0.0000 42 0.1226 0.0000 43 0.1138 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0895 1099 5 .0 Pass 0.0915 979 5 .0 Pass 0.0936 915 5 .0 Pass 0.0957 848 5 .0 Pass 0.0977 788 5 .0 Pass 0.0998 728 5 .0 Pass 0.1018 680 3 .0 Pass 0.1039 627 3 .0 Pass 0.1060 599 3 .0 Pass 0.1080 528 1 .0 Pass 0.1101 492 1 .0 Pass 0.1122 956 1 .0 Pass 0.1142 422 1 .0 Pass 0.1163 388 0 .0 Pass 0.1184 356 0 .0 Pass 0.1204 335 0 .0 Pass 0.1225 316 0 .0 Pass 0.1245 299 0 .0 Pass 0.1266 276 0 .0 Pass 0.1287 257 0 .0 Pass 0.1307 241 0 .0 Pass 0.1328 222 0 .0 Pass 0.1349 202 0 .0 Pass 0.1369 191 0 .0 Pass 0.1390 175 0 .0 Pass 0.1411 165 0 .0 Pass 0.1431 158 0 .0 Pass 0.1452 152 0 .0 Pass 0.1972 196 0 .0 Pass 0.1493 141 0 .0 Pass 0.1514 138 0 .0 Pass 0.1534 133 0 .0 Pass 0.1555 122 0 .0 Pass 0.1576 115 0 .0 Pass 0.1596 109 0 .0 Pass 0.1617 104 0 .0 Pass 0.1638 98 0 .0 Pass 0.1658 90 0 .0 Pass 0.1679 89 0 .0 Pass 0.1699 81 0 .0 Pass 0.1720 71 0 .0 Pass 0.1741 69 0 .0 Pass 0.1761 63 0 .0 Pass 0.1782 60 0 .0 Pass 0.1803 57 0 .0 Pass 0.1823 54 0 .0 Pass 0.1844 48 0 .0 Pass 0.1865 47 0 .0 Pass 0.1885 44 0 .0 Pass 0.1906 40 0 .0 Pass 0.1926 39 0 .0 Pass 0.1947 36 0 .0 Pass 0.1968 33 0 .0 Pass 0.1988 28 0 .0 Pass 0.2009 27 0 .0 Pass 0.2030 24 0 .0 Pass 0.2050 20 0 .0 Pass 0.2071 20 0 .0 Pass 0.2092 19 0 .0 Pass 0.2112 16 0 .0 Pass 0.2133 16 0 .0 Pass 0.2153 16 0 .0 Pass 0.2174 16 0 .0 Pass 0.2195 15 0 .0 Pass 0.2215 13 0 .0 Pass 0.2236 12 0 .0 Pass 0.2257 12 0 .0 Pass 0.2277 10 0 .0 Pass 0.2298 9 0 .0 Pass 0.2319 8 0 .0 Pass 0.2339 8 0 .0 Pass 0.2360 8 0 .0 Pass 0.2380 8 0 .0 Pass 0.2401 7 0 .0 Pass 0.2422 7 0 .0 Pass 0.2442 5 0 .0 Pass 0.2463 5 0 .0 Pass 0.2484 5 0 .0 Pass 0.2504 5 0 .0 Pass 0.2525 5 0 .0 Pass 0.2546 5 0 .0 Pass 0.2566 5 0 .0 Pass 0.2587 5 0 .0 Pass 0.2608 5 0 .0 Pass 0.2628 5 0 .0 Pass 0.2699 5 0 .0 Pass 0.2669 5 0 .0 Pass 0.2690 4 0 .0 Pass 0.2711 4 0 .0 Pass 0.2731 2 0 .0 Pass 0.2752 2 0 .0 Pass 0.2773 2 0 .0 Pass 0.2793 2 0 .0 Pass 0.2814 1 0 .0 Pass 0.2835 1 0 .0 Pass 0.2855 1 0 .0 Pass 0.2876 1 0 .0 Pass 0.2896 1 0 .0 Pass 0.2917 1 0 .0 Pass 0.2938 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.026 acre-feet On-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 efs. Off-line facility target flow: 0.07 cfs. Adjusted for 15 min: 0.08 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclarms alt warranties, either expressed or implied, including but not limited to Implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limrtation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q0 xxxxxx~xxxxw~aoc~xxMxxxx '~ 1.0 i1 ....~ W ~ aaacao~ooc~~x'"~`'~y00'' Predeveloped v 10E-1 x bevelopec~,~iitigated ~_ x t0E,2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEEM : FL04+! (cts) 100 ~ .454iDD =-. ;_..-_ ~ ; . , , ; ~ o Predevebped 50 4209 i ~ ~ ~ _ ~ ~ ; ~ _ , ~ ~ x Developed witl~ Facil~Fy 25 .3895 _._~ .~ ' ' ? ~ ~ ~ ~ ` , 0 3S .. ... . ~ .... , .. _ . ~3 10 3459 -~--~ ~ ; ~ 0 27 ~_ _ ~_ . ~ 3117 ~ ~~ n ~ ... - _ ` . A - ., ~ ~,~> ~ ~ ~~ ~ 020 _ _ ~ __ . I ~ ~ 2 2551 ~ = 0 93 i ~ '' ~ D 10E~5 ~ 10E•d 90E 3 101:•2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR , F~ow ice) - 100 ` 11 38 ,~~,i~~ ' j ~ ;~,zi t~, fit <' 33 ~i j ~ ;~j= _~ t ;;; 50 7701 ~ _;: i~~ t ~ r3 > 3 ( S ~ 'i: r~ i ~ ~ , 25 5 045 - _ ~ ,, # i 3 ' ~ 7 ~ S ~ ; ; i 10 2.689 '`_ ,,, 5 '1.518 ~ ~ ~ ~ _;' ~`_ ~ `~;, 2 5459 0 early Peaks for Developed W/Pond CLEARHIS BSN F1 Event Summary: BasinlD Peak O Event ------- (cfs) BSN F1 0.11 BSN F1 0 19 BSN F1 0 31 BSN F1 0 37 BSN F1 0 40 BSN F1 0 43 yr Drainage Area: BSN F1 Hyd Method: SBUH Hyd Peak Factor 484.00 Storm Dur. 24 00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0386 0 52 SBUH/SCS TYPE1A 6 mo 8 00 0 0664 0 52 SBUH/SCS TYPEIA 2 yr 8 00 0 1068 0 52 SBUH/SCS TYPEIA 10 yr 8 00 0 1274 0 52 SBUH/SCS TYPEIA 25 yr 8 00 0 1378 0 52 SBUHISCS TYPEIA 50 yr 8 00 0 1482 0 52 SBUH/SCS TYPE1A 100 Area CN Pervious 0.1025 ac 78.00 Impervious 0 4210 ac 98 00 Total 0.5235 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description• Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Lme of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method SCS CN Number SCS Abs. 0.20 Intv 10 00 min TC 0.03 hrs 0.10 hrs 0.1025 ac 0 2907 ac 0 0500 ac 0 0803 ac Length Slope: Coeff: Travel Time 6.00 ft 2 00% 0 2400 1.90 min Length. Slope: Coeff• Travel Time 330 00 ft 0 50% 27 0000 3.83 min 1850 ft 200% 00110 0.40 min 100 00 ft 0 50% 21 0000 1.12 min 5 00 ft 2.00% 0 0110 0 14 min 20 00 ft 2.00% 0.0110 0.42 min MOVEHYD [BSN F1] TO [BSN F1 - 6 mo] AS [6 mo] Peak Flow 0.1125 cfs Peak Time• 8 00 hrs Hyd Vol. 1679 87 cf - 0 0386 acft MOVEHYD [BSN F1] TO [BSN F1 - 2 yr] AS [2 yr] Peak Flow• 0 1923 cfs Peak Time• 8 00 hrs Hyd Vol 2891.63 cf - 0.0664 acft MOVEHYD [BSN F1] TO [BSN F1 - 10 yr] AS [10 yr] Peak Flow: 0 3083 cfs Peak Time: 8 00 hrs Hyd Vol• 4650 47 cf - 0 1068 acft MOVEHYD [BSN F1] TO [BSN F1 - 25 yr] AS [25 yr] Peak Flow: 0 3673 cfs Peak Time. 8 00 hrs Hyd Vol 5549.24 cf - 0.1274 acft MOVEHYD [BSN F1] TO [BSN F1 - 50 yr] AS [50 yr] Peak Flow. 0 3970 cfs Peak Time 8 00 hrs Hyd Vol 6001 69 cf - 0 1378 acft ~~'v~. J~ ~~ MOVEHYD [BSN F1] TO [BSN F1 - 100 yr] AS [100 yr] Peak Flow: 0 4268 cfs Peak Tnne. 8.00 hrs Hyd Vol: 6456 02 cf - 0.1482 acft Hydrograph ID: BASIN F - 6 mo Area: 0.5235 ac Hyd Int 10 00 min Base Flow. Peak Flow: 0.1125 cfs Peak Time: 8.00 hrs Hyd Vol. 0 0386 acft Hydrograph ID: BASIN F - 100 yr Area: 0 5235 ac Hyd Int: 10 00 min Base Flow Peak Flow: 0 4268 cfs Peak Time 8 00 hrs Hyd Vol: 0.1482 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0012 8 67 0 1812 16 50 0 0599 0 83 0 0049 8 83 0 1548 16 67 0 0599 1 00 0.0095 9 00 0 1539 16 83 0 0600 1 17 0 0147 9 17 0 1349 17 00 0 0600 1 33 0 0198 9 33 0 1166 17 17 0 0580 1 50 0 0233 9 50 0 1162 17 33 0.0561 1 67 0 0272 9 67 0 1102 17 50 0 0561 1 83 0 0307 9 83 0 1049 17 67 0 0561 2 00 0 0331 10 00 0.1049 17 83 0 0561 2 17 0 0361 10 17 0 0991 18 00 0 0561 2 33 0 0390 10 33 0 0936 18 17 0 0541 2 50 0 0407 10 50 0 0936 18 33 0 0522 2 67 0 0420 10 67 0 0897 18 50 0 0522 2 83 0 0432 10 83 0 0861 18 67 0 0522 3 00 0 0442 11 00 0 0861 18 83 0 0522 3 17 0 0450 11 17 0 0841 19 00 0 0522 3 33 0 0458 11 33 0 0823 19 17 0 0502 3 50 0 0464 11 50 0 0824 19 33 0 0483 3 67 0 0484 11 67 0 0804 19 50 0 0483 3 83 0 0504 11 83 0 0786 19 67 0 0482 4 00 0 0511 12 00 0 0786 19 83 0.0483 4 17 0 0544 12 17 0 0767 20 00 0.0483 4 33 0 0579 12 33 0 0749 20 17 0 0483 4 50 0 0586 12 50 0.0749 20 33 0 0483 4 67 0 0619 12 67 0 0729 20 50 0 0483 4 83 0 0656 12 83 0 0711 20 67 0 0483 5 00 0 0666 13 00 0 0711 20 83 0 0483 5 17 0 0703 13 17 0 0711 21 00 0 0483 5 33 0 0742 13 33 0 0712 21 17 0 0484 5 50 0 0752 13 50 0 0712 21 33 0 0484 5 67 0 0790 13 67 0 0693 21 50 0 0484 5 83 0 0829 13 83 0 0674 21 67 0 0484 6 00 0 0839 14 00 0 0674 21 83 0 0484 6 17 0 0910 14 17 0 0674 22 00 0.0484 6 33 0 0984 14 33 0 0675 22 17 0 0464 6 50 0 0996 14 50 0.0675 22 33 0 0445 6 67 0 1103 14 67 0 0656 22 50 0 0445 6 83 0 1214 14 83 0 0637 22 67 0 0444 7 00 0 1229 15 00 0 0637 22 83 0 0444 7 17 0.1358 15 17 0 0636 23 00 0 0444 7 33 0 1490 15 33 0 0637 23 17 0 0445 7 50 0 1508 15.50 0 0637 23 33 0 0445 7 67 0 2804 15 67 0 0618 23.50 0 0445 7 83 0 4149 15 83 0 0599 23 67 0 0445 8.00 0 4268 16 00 0 0599 23 83 0 0445 8 17 0 3230 16 17 0 0598 24 00 0 0445 8 33 0 2140 16 33 0 0599 24 17 0 0222 8 50 0 2112 16 50 0 0599 24 33 0 0017 Hydrograph ID: BASIN F - 100 yr Area. 0 5235 ac Hyd Int. 10 00 min Base Flow: Peak Flow: 0 4268 cfs Peak Tlme: 8 00 hrs Hyd Vol. 0.1482 acft MOVEHYD [BASIN F] TO [BASIN F - 6 mo] AS [6 mo] Peak Flow 0.1125 cfs Peak Time 8.00 hrs Hyd Vol: 1679.87 cf - 0.0386 acft MOVEHYD [BASIN F] TO [BASIN F - 100 yr] AS [100 yr] Peak Flow: 0 4268 cfs Peak Time 8 00 hrs Hyd Vol 6456.02 cf - 0.1482 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 331.0000 ft 337.0000 ft 0.10 Infil~ 10.00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE F Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 70 0000 ft 1.00 Width Bank Hgt ss1 10 0000 ft 3.0000 ft 3 OOh:1 v Up Node Dn Node Up Invert DUMMY F 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0 50000 ft 1 0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 0.0000 in/hr NO NO Conduit Sum mary: Trib Area Flow Capacity 0 0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh.1v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 0 0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN F - 6 MO] THRU [BIOSWALE F] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 1690 ---- 1 00 0.0873 Ditch 0 5672 ----- BASIN F ROUTEHYD [BASIN F - 100 YRJ THRU [BIOSWALE F] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 6766 ---- 1 00 0 1882 Ditch 0 9148 ----- BASIN F Node ID: INFILTRATION F Desc: Manhole structure Start EI 337.0000 ft Max EI: 338.0000 ft Contnb Basin: Contrib Hyd Length Width Void Ratio 70 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN F RPL Desc. Manhole structure Start EI. 337.0000 ft Max EI. 338 0000 ft Contrib Basin Contrib Hyd: Storage Id: INFILTRATION F Discharge Id' INFILTRATION RLPCOMPUTE [BASIN F RPL] SUMMARY 100 YR MatchQ=PeakQ= 0.6766 cfs Peak Out O: 0.2233 cfs -Peak Stg. 338 31 ft - Active Vol. 1078 94 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -F Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Preca.p Scale: 0.80 PREDEVELOPED LAND USE Basin Basin F Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 DEVELOPED LAND USE Basin Basin F Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale F Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 70ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Sa.de slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.009 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 336.5 0.016 0.000 0.000 0.000 336.6 0.017 0.001 0.000 0.162 336.7 0.018 0.003 0.000 0.162 336.7 0.019 0.004 0.000 0.162 336.8 0.019 0.006 0.000 0.162 < F. n c ~_- ~gEPH Dq ~ bop wASy~t~l{p . ~~ ~~ 4 % o ~~ .~s 3aa s ~ t~ ~Fc~s~ EK` ~~ \r~ ~ IpN~~~~.sd' 0922-DS 336.'9 0.020 0.007 0.000 0.162 337.0 0.021 0.009 0.000 0.162 `337.0 0.022 0.010 0.411 0.162 337.1 0.023 0.012 1.873 0.162 337.2 0.024 0.014 3.92_0 0.162 337.3 0.024 0.016 6.416 0.]62 337.4 0.025 0.018 9.292 0.]62 337.4 0.026 0.020 12.50 0.162 337.5 0.027 0.022 16.01 0.162 337.6 0.028 0.024 19.81 0.162 337.7 0.029 0.026 23.86 0.162 337.7 0.030 0.028 28.15 0.162 337.8 0.031 0.031 32.67 0.162_ 337.9 0.031 0.033 37.42 0.162 338.0 0.032 0.036 42.37 0.162 338.1 0.033 0.038 47.53 0.162 338.1 0.034 0.041 52.88 0.162 338.2 0.035 0.043 58.41 0.162 338.3 0.036 0.046 64.13 0.162 338.4 0.037 0.049 70.02 0.162 338.9 0.038 0.052 76.08 0.162 338.5 0.039 0.055 82.31 0.162 338.6 0.090 0.058 88.70 0.162 338.7 0.041 0.061 95.24 0.162 338.8 0.042 0.069 101.9 0.162 338.8 0.043 0.068 108.8 0.162 338.9 0.044 0.071 115.8 0.162 339.0 0.045 0.074 122.9 0.162 339.1 0.046 0.078 130.2 0.162 339.1 0.047 0.081 137.6 0.162 339.2 0.048 0.085 145.2 0.162 339.3 0.049 0.089 152.9 0.162 339.4 0.050 0.093 160.7 0.162 339.5 0.051 0.097 168.6 0.162 339.5 0.052 0.101 176.7 0.162 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(efs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272471 50 year 0.293769 100 year 0.314592 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272471 50 year 0.293769 100 year 0.314542 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated .Year Predeveloped Develo ed 1956 0.171 0.000 1957 0.273 0.116 1958 0.157 0.000 1959 0.182 0.000 1960 0.201 0.000 1961 0.135 0.000 1962 0.144 0.000 1963 0.294 0.070 1964 0.210 0.001 1965 0.198 0.000 1966 0.139 0.000 1967 0.172 0.000 1968 0.133 0.000 1969 0.131 0.000 1970 0.131 0.000 1971 0.163 0.000 1972 0.200 0.012 1973 0.154 0.000 1974 0.180 0.000 1975 0.156 0.000 1976 0.180 0.000 1977 0.227 0.022 1978 0.193 0.000 1979 0.229 0.000 1980 0.172 0.000 1981 0.197 0.024 1982 0.227 0.000 1983 0.243 0.053 1984 0.149 0.000 1985 0.172 0.000 1986 0.192 0.006 1987 0.210 0.037 1988 0.114 0.000 1989 0.136 0.000 1990 0.269 0.100 1991 0.280 0.106 1992 0.167 0.000 1993 0.123 0.000 1994 0.136 0.000 1995 0.197 0.021 1996 0.200 0.022 1997 0.161 0.000 1998 0.226 0.000 1999 0.194 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Ma.tigated Rank Predeveloped Developed 1 0.2798 0.1057 2 0.2729 0.0999 3 0.2690 0.0696 4 0.2934 0.0533 5 0.2293 0.0366 6 0.2274 0.0294 7 0.2268 0.0224 8 0.2260 0.0217 9 0.2099 0.0207 10 0.2096 0.0121 11 0.2007 0.0057 12 0.2004 0.0007 13 0.2002 0.0005 19 0.1984 0.0000 15 0.1973 0.0000 16 0.1972 0.0000 17 0.1941 0.0000 18 0.1926 0.0000 19 0.1924 0.0000 20 0.1824 0.0000 21 ~ 0.1798 0.0000 22 0.1796 0.0000 23 0.1720 0.0000 24 0.1720 0.0000 25 0.1718 0.0000 26 0.1709 0.0000 27 0.1673 0.0000 28 0.1632 0.0000 29 0.1613 0.0000 30 0.1565 0.0000 31 0.1556 0.0000 32 0.1542 0.0000 33 0.1988 0.0000 34 0.1440 0.0000 35 0.1387 0.0000 36 0.1362 0.0000 37 0.1362 0.0000 38 0.1347 0.0000 39 0.1332 0.0000 40 0.1314 0.0000 91 0.1312 0.0000 42 0.1226 0.0000 43 0.1138 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0895 1049 5 .0 Pass 0.0915 979 5 .0 Pass 0.0936 915 5 .0 Pass 0.0957 848 5 .0 Pass 0.0977 788 5 .0 Pass 0.0998 728 5 .0 Pass 0.1018 680 3 .0 Pass 0.1039 627 3 .0 Pass 0.1060 594 3 .0 Pass 0.1080 528 1 .0 Pass 0.1101 492 1 .0 Pass 0.1122 456 1 .0 Pass 0.1142 422 1 .0 Pass 0.1163 388 0 .0 Pass 0.1184 356 0 .0 Pass 0.1209 335 0 .0 Pass 0.1225 316 0 .0 Pass 0.1245 299 0 .0 Pass 0.1266 276 0 .0 Pass 0.1287 257 0 .0 Pass 0.1307 241 0 .0 Pass 0.1328 222 0 .0 Pass 0.1349 202 0 .0 Pass 0.1369 191 0 .0 Pass 0.1390 175 0 .0 Pass 0.1411 165 0 .0 Pass 0.1431 158 0 .0 Pass 0.1452 152 0 .0 Pass 0.1972 146 0 .0 Pass 0.1493 191 0 .0 Pass 0.1519 ]38 0 .0 Pass 0.1534 133 0 .0 Pass 0.1555 122 0 .0 Pass 0.1576 115 0 .0 Pass 0.1596 109 0 .0 Pass 0.1617 104 0 .0 Pass 0.1638 98 0 .0 Pass 0.1658 90 0 .0 Pass 0.1679 89 0 .0 Pass 0.1699 81 0 .0 Pass 0.1720 71 0 .0 Pass 0.1741 69 0 .0 Pass 0.1761 63 0 .0 Pass 0.1782 60 0 .0 Pass ,0.1803 57 0 .0 Pass 0.1823 54 0 .0 Pass 0.1894 48 0 .0 Pass 0.1865 47 0 .0 Pass 0.1885 44 0 .0 Pass 0.1906 40 0 .0 Pass 0.1926 39 0 .0 Pass 0.1947 36 0 .0 Pass 0.1968 33 0 .0 Pass 0.1988 28 0 .0 Pass 0.2009 27 0 .0 Pass 0.2030 29 0 .0 Pass 0.2050 20 0 .0 Pass 0.2071 20 0 .0 Pass 0.2092 19 0 .0 Pass 0.2112 16 0 .0 Pass 0.2133 16 0 .0 Pass 0.2153 16 0 .0 Pass 0.2174 16 0 .0 Pass 0.2195 15 0 .0 Pass 0.2215 13 0 .0 Pass 0.2236 12 0 .0 Pass 0.2257 12 0 .0 Pass 0.2277 10 0 .0 Pass 0.2298 9 0 .0 Pass 0.2319 8 0 .0 Pass 0.2339 8 0 .0 Pass 0.2360 8 0 .0 Pass 0.2380 8 0 .0 Pass 0.2901 7 0 .0 Pass 0.2422 7 0 .0 Pass 0.2942 5 0 .0 Pass 0.2463 5 0 .0 Pass 0.2484 5 0 .0 Pass 0.2504 5 0 .0 Pass 0.2525 5 0 .0 Pass 0.2546 5 0 .0 Pass 0.2566 5 0 .0 Pass 0.2587 5 0 .0 Pass 0.2608 5 0 .0 Pass 0.2628 5 0 .0 Pass 0.2699 5 0 .0 Pass 0.2669 5 0 .0 Pass 0.2690 4 0 .0 Pass 0.2711 4 0 .0 Pass 0.2731 2 0 .0 Pass 0.2752 2 0 .0 Pass 0.2773 2 0 .0 Pass 0.2793 2 0 .0 Pass 0.2814 1 0 .0 Pass 0.2835 1 0 .0 Pass 0.2855 1 0 .0 Pass 0.2876 1 0 .0 Pass 0.2896 1 0 .0 Pass 0.2917 1 0 .0 Pass 0.2938 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.026 acre-feet On-la.ne facility target flow: 0 1 cfs. Adjusted for 15 m~.n: 0 11 cfs. Off-line facility target flow: 0.07 cfs Adjusted for 15 min: 0.08 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington state Department of Ecology disclaims all warranties, either_ e~cpressed or implied, including but not limited to implied warranties of program and accompanying documentation In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. YEAR FLOpJ (cis) 100 11 38 ~ ~ , # ~ iii ~ ~ i j3 `~i ~ `t; ° . ~ i i ~ i t 50 7701 z~~, ~ ~~ '~ ' 'a~ 'It i> ~); I 25 -5445 ~ '~~~ ~ _ ~i „ f ~ ~ 3 ~ r £ i 10 2 581 -' ~ ~ ~ --' `°"' ~ ~ ' ~ ~ i ~ ,~1~~(I' Fi~~'~, 5 1 J1B i t t 2 5459 ~ ~ ~ i o 10.0 kkkkkkkkkkkkYYCJJ^4~~:d#I&PS~?-00~?fi0+kh}SXkXk ~-., `~ 1.0 V -,,.. O O40n '''~"C°x a~a~~d~~'~ o Predeveloped = t0E-1 x Developec~~litigated t i +n x t' 10E-2 1 10 20 30 d0 50 60 70 SO 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart YFAR fLOPJ (tts) 900 ~~ ~~ ~ ~ ~ o Predeveloped ~ 0 50 .4209 q~ x Developed ~ritl~ iacd~y e 25 3895 035 . .....,. ~ -. _,. ~ 10 ,3459 ... 0 27 . _ .. _ 5 3117 U `'` 0 20 - - 2 2551 . ~. ~ V _y 013 __ __ _. ___ 4 _ -- --- ~~ ~ 10 P E•5 ~ 90E-4 90E•3 10E•2 10E•1 1 10 ercent Exceedin Yearly Peaks for developed W/O Pond Duration Graph early Peaks for Developed W/Pond CLEARHIS BSN F1 Event Summary: BasmlD Peak Q Event ------- (cfs) BSN F1 0 11 BSN F1 0 19 BSN F1 0 31 BSN F1 0 37 BSN F1 0 40 BSN F1 0 43 yr Drainage Area: BSN F1 Hyd Method: SBUH Hyd Peak Factor. 484 00 Storm Dur: 24.00 hrs Peak T Peak Vol Area Method Raintype (hrs) (ac-ft) ac /Loss 8 00 0 0386 0 52 SBUH/SCS TYPEIA 6 mo 8 00 0 0664 0 52 SBUH/SCS TYPEIA 2 yr 8 00 0 1068 0 52 SBUH/SCS TYPEIA 10 yr 8 00 0 1274 0 52 SBUH/SCS TYPE1A 25 yr 8 00 0 1378 0 52 SBUH/SCS TYPEIA 50 yr 8 00 0 1482 0 52 SBUH/SCS TYPEIA 100 Area CN Pervious 0.1025 ac 78.00 Impervious 0.4210 ac 98.00 Total 0.5235 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type• Description: Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Loss Method: SCS CN Number SCS Abs. 0.20 Intv: 10 00 min TC 0 03 hrs 010 hrs 0.1025 ac 0 2907 ac 0 0500 ac 0 0803 ac Length Slope: Coeff• Travel Time 6.00 ft 2 00% 0 2400 1.90 min Length: Slope Coeff. Travel Time 330.00 ft 0.50% 27 0000 3 83 min 18 50 ft 2.00% 0.0110 0.40 mm 100.00 ft 0 50% 21 0000 1 12 min 5 00 ft 2.00% 0 0110 0.14 min 20.00 ft 2.00% 0 0110 0.42 min MOVEHYD [BSN F1] TO [BSN F1 - 6 mo] AS [6 mo] Peak Flow 0 1125 cfs Peak Time 8 00 hrs Hyd Vol 1679 87 cf - 0 0386 acft MOVEHYD [BSN F1] TO [BSN F1 - 2 yr] AS [2 yr] Peak Flow 0 1923 cfs Peak Time 8 00 hrs Hyd Vol 2891 63 cf - 0.0664 acft MOVEHYD [BSN F1] TO [BSN F1 - 10 yr] AS [10 yr] Peak Flow 0.3083 cfs Peak Time: 8 00 hrs Hyd Vol: 4650 47 cf - 0 1068 acft MOVEHYD [BSN F1] TO [BSN F1 - 25 yr] AS [25 yrJ Peak Flow 0 3673 cfs Peak Time: 8.00 hrs Hyd Vol: 5549 24 cf - 0 1274 acft MOVEHYD [BSN F1] TO [BSN F1 - 50 yr] AS [50 yr] Peak Flow 0.3970 cfs Peak Time• 8 00 hrs Hyd Vol. 6001.69 cf - 0 1378 acft ~,.v . ~,, ,fit , , MOVEHYD [BSN F1] TO [BSN F1 - 100 yr] AS (100 yr] Peak Flow. 0 4268 cfs Peak Time 8.00 hrs Hyd Vol 6456 02 cf - 0.1482 acft Hydrograph ID: BASIN F - 6 mo Area: 0.5235 ac Hyd Int~ 10 00 min Base Flow Peak Flow: 0.1125 cfs Peak Time 8 00 hrs Hyd Vol: 0 0386 acft Hydrograph ID: BASIN F - 100 yr Area 0 5235 ac Hyd Int~ 10.00 min Base Flow Peak Flow. 0 4268 cfs Peak Time 8.00 hrs Hyd Vol. 0.1482 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0012 8 67 0 1812 16 50 0 0599 0 83 0 0049 8 83 0 1548 16 67 0 0599 1 00 0 0095 9 00 0 1539 16 83 0 0600 1 17 0 0147 9.17 0 1349 17 00 0 0600 1 33 0 0198 9 33 0 1166 17 17 0 0580 1 50 0 0233 9 50 0 1162 17 33 0 0561 1 67 0 0272 9 67 0 1102 17 50 0 0561 1 83 0 0307 9 83 0 1049 17 67 0 0561 2 00 0 0331 10 00 0 1049 17 83 0 0561 2 17 0 0361 10 17 0 0991 18 00 0 0561 2 33 0 0390 10 33 0 0936 18 17 0 0541 2 50 0 0407 10 50 0 0936 18 33 0 0522 2 67 0 0420 10 67 0 0897 18 50 0 0522 2 83 0 0432 10 83 0 0861 18 67 0 0522 3 00 0 0442 11 00 0 0861 18 83 0 0522 3 17 0 0450 11 17 0 0841 19 00 0 0522 3 33 0 0458 11 33 0 0823 19 17 0 0502 3 50 0 0464 11 50 0 0824 19 33 0 0483 3 67 0.0484 11 67 0 0804 19 50 0 0483 3 83 0 0504 11 83 0 0786 19 67 0 0482 4 00 0 0511 12 00 0 0786 19 83 0 0483 4 17 0 0544 12 17 0 0767 20 00 0 0483 4 33 0 0579 12 33 0 0749 20 17 0 0483 4 50 0 0586 12 50 0 0749 20 33 0 0483 4 67 0.0619 12 67 0 0729 20 50 0 0483 4 83 0 0656 12 83 0 0711 20.67 0 0483 5 00 0 0666 13 00 0 0711 20 83 0 0483 5 17 0 0703 13 17 0.0711 21 00 0 0483 5 33 0 0742 13 33 0 0712 21 17 0 0484 5 50 0 0752 13 50 0 0712 21 33 0.0484 5 67 0 0790 13 67 0 0693 21.50 0 0484 5 83 0 0829 13 83 0 0674 21 67 0.0484 6 00 0 0839 14 00 0 0674 21 83 0 0484 6 17 0 0910 14 17 0 0674 22 00 0 0484 6 33 0 0984 14 33 0 0675 22 17 0 0464 6 50 0 0996 14 50 0 0675 22 33 0 0445 6 67 0.1103 14 67 0 0656 22 50 0 0445 6 83 0 1214 14 83 0 0637 22 67 0 0444 7 00 0.1229 15 00 0 0637 22 83 0 0444 7 17 0 1358 15.17 0 0636 23 00 0 0444 7 33 0 1490 15 33 0 0637 23 17 0 0445 7 50 0.1508 15 50 0 0637 23 33 0 0445 7 67 0 2804 15 67 0 0618 23 50 0 0445 7 83 0 4149 15 83 0 0599 23 67 0 0445 8 00 0 4268 16 00 0 0599 23 83 0 0445 8 17 0 3230 16 17 0 0598 24 00 0 0445 8 33 0 2140 16 33 0 0599 24 17 0 0222 8 50 0 2112 16 50 0 0599 24 33 0 0017 Hydrograph ID: BASIN F - 100 yr Area• 0.5235 ac Hyd Int 10 00 min Base Flow: Peak Flow: 0.4268 cfs Peak Time 8 00 hrs Hyd Vol 0 1482 acft MOVEHYD [BASIN F] TO [BASIN F - 6 mo] AS [6 mo] Peak Flow. 0.1125 cfs Peak Tlme 8 00 hrs Hyd Vol 1679 87 cf - 0.0386 acft MOVEHYD [BASIN F] TO [BASIN F - 100 yr] AS [100 yrJ Peak Flow 0 4268 cfs Peak Time. 8 00 hrs Hyd Vol• 6456 02 cf - 0 1482 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 331 0000 ft 337.0000 ft 0.10 Infil: 10.00 in/hr Multiplier 1 00 Reach ID: BIOSWALE F Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 70.0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3 0000 ft 3 OOh 1 v Up Node Dn Node Up Invert DUMMY F 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0.50000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 0.0000 in/hr NO NO Conduit Sum mary: Trib Area Flow Capacity 0 0000 ac 0.0000 cf 0.0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method. Travel Time Translation Hyd params By 0.0250 Mannings Formula ss2 3 OOh.1 v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0.5000 ft 1 0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0.0000 ft ROUTEHYD [BASIN F - 6 MO] THRU [BIOSWALE F] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 1690 ---- 1 00 0 0873 Ditch 0 5672 ----- BASIN F ROUTEHYD [BASIN F - 100 YR] THRU [BIOSWALE F] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 6766 ---- 1 00 0 1882 Ditch 0 9148 ----- BASIN F Node ID: INFILTRATION F Desc: Manhole structure Start EI 337 0000 ft Max EI 338 0000 ft Contrib Basin• Contrib Hyd: Length Width Void Ratio 70 0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN F RPL Desc. Manhole structure Start EI: 337.0000 ft Max EI: 338 0000 ft Contrib Basin Contrib Hyd. Storage Id: INFILTRATION F Discharge Id: INFILTRATION RLPCOMPUTE [BASIN F RPL] SUMMARY 100 YR MatchQ=PeakQ= 0.6766 cfs Peak Out Q• 0.2233 cfs -Peak Stg• 338 31 ft - Active Vol. 1078 94 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -F Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin F Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 DEVELOPED LAND USE Basin Basin F Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale F Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Dimensions Depth: aft. Bottom Length: 70ft. Bottom Width loft. Sa.de slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Ra.ser Head: 0.009 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. Pond Hydraulic Table Stage(£t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 336.5 0.016 0.000 0.000 0.000 336.6 0.017 0.001 0.000 0.162 336.7 0.018 0.003 0.000 0.162 336.7 0.019 0.004 0.000 0.162 336.8 0.019 0.006 0.000 0.162 f F' ~.. ~. r " c. r-_ v~ ~~gEPH Dq~~ ~pP wASy~( l{ ~` ~ or ~4. ~ (/~.~ ~ CFO S'1 F ~` `, C,{,~~ l~ f ~~`~ 09?2 - DS 336.9 0.020 0.007 0.000 0.162 337.0 0.021 0.009 0.000 0.162 337.0 0.022 0.010 0.411 0.162 337.1 0.023 0.012 1.873 0.162 337.2 0.024 0.014 3.920 0.162 337.3 0.024 0.016 6.4]6 0.162 337.4 0.025 0.018 9.292 0.162 337.4 0.026 0.020 12.50 0.162 337.5 0.027 0.022 16.01 0.162 337.6 0.028 0.024 19.81 0.162 337.7 0.029 0.026 23.86 0.162 337.7 0.030 0.028 28.15 0.162 337.8 0.031 0.031 32.67 0.]62 337.9 0.031 0.033 37.42 0.162 338.0 0.032 0.036 92.37 0.162 338.1 0.033 0.038 47.53 0.162 338.1 0.034 0.041 52.88 0.162 338.2 0.035 0.043 58.41 0.162 338.3 0.036 0.046 64.13 0.162 338.4 0.037 0.049 70.02 0.162 338.4 0.038 0.052 76.08 0.162 338.5 0.039 0.055 82.31 0.162 338.6 0.040 0.058 88.70 0.162 338.7 0.091 0.061 95.24 0.162 338.8 0.042 0.064 101.9 0.162 338.8 0.043 0.068 108.8 0.162 338.9 0.099 0.071 115.8 0.162 339.0 0.045 0.079 122.9 0.162 339.1 0.046 0.078 130.2 0.162 339.1 0.097 0.081 137.6 0.162 339.2 0.048 0.085 145.2 0.162 339.3 0.049 0.089 152.9 0.162 339.4 0.050 0.093 160.7 0.162 339.5 0.051 0.097 168.6 0.162 339.5 0.052 0.101 176.7 0.162 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272971 50 year 0.293769 100 year 0.314542 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(efs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272471 50 year 0.293769 100 year 0.319542 Flow Frequency Return Periods for Developed M~.tigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated dear Predeveloped Developed 1956 0.171 0.000 1957 0.273 0.116 1958 0.157 0.000 1959 0.182 0.000 1960 0.201 0.000 1961 0.135 0.000 1962 0.144 0.000 1963 0.294 0.070 1964 0.210 0.001 1965 0.198 0.000 ]966 0.139 0.000 1967 0.172 0.000 1968 0.133 0.000 1969 0.131 0.000 1970 0.131 0.000 1971 0.163 0.000 1972 0.200 0.012 1973 0.154 0.000 1979 0.180 0.000 1975 0.156 0.000 1976 0.180 0.000 1977 0.227 0.022 1978 0.193 0.000 1979 0.229 0.000 1980 0.172 0.000 1981 0.197 0.024 1982 0.227 0.000 1983 0.243 0.053 1984 0.149 0.000 1985 0.172 0.000 1986 0.192 0.006 1987 0.210 0.037 1988 0.114 0.000 1989 0.136 0.000 1990 0.269 0.100 1991 0.280 0.106 1992 0.167 0.000 1993 0.123 0.000 1994 0.136 0.000 1995 0.197 0.021 1996 0.200 0.022 1997 0.161 0.000 1998 0.226 0.000 1999 0.194 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2798 0.1057 2 0.2729 0.0999 3 0.2690 0.0696 4 0.2439 0.0533 5 0.2293 0.0366 6 0.2279 0.0244 7 0.2268 0.0229 8 0.2260 0.0217 9 0.2099 0.0207 10 0.2.096 0.0121 11 0.2007 0.0057 12 0.2004 0.0007 13 0.2002 0.0005 19 0.1989 0.0000 15 0.1973 0.0000 16 0.1972 0.0000 17 0.1941 0.0000 18 0.1926 0.0000 19 0.1924 0.0000 ?0 0.1824 0.0000 21 0.1798 0.0000 22 0.1796 0.0000 23 0.1720 0.0000 24 0.1720 0.0000 25 0.1718 0.0000 26 0.1709 0.0000 27 0.1673 0.0000 28 0.1632 0.0000 29 0.1613 0.0000 30 0.1565 0.0000 31 0.1556 0.0000 32 0.1542 0.0000 33 0.1488 0.0000 39 0.1490 0.0000 35 0.1387 0.0000 36 0.1362 0.0000 37 0.1362 0.0000 38 0.1347 0.0000 39 0.1332 0.0000 40 0.1314 0.0000 41 0.1312 0.0000 42 0.1226 0.0000 43 0.1138 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0895 1099 5 .0 Pass 0.0915 979 5 .0 Pass 0.0936 915 5 .0 Pass 0.0957 848 5 .0 Pass 0.0977 788 5 .0 Pass 0.0998 728 5 .0 Pass 0.1018 680 3 .0 Pass 0.1039 627 3 .0 Pass 0.1060 594 3 .0 Pass 0.1080 528 1 .0 Pass 0.1101 492 1 .0 Pass 0.1122 456 1 .0 Pass 0.1142 422 1 .0 Pass 0.1163 388 0 .0 Pass 0.1184 356 0 .0 Pass 0.1204 335 0 .0 Pass 0.1225 316 0 .0 Pass 0.1245 299 0 .0 Pass 0.1266 276 0 .0 Pass 0.1287 257 0 .0 Pass 0.1307 241 0 .0 Pass 0.1328 222 0 .0 Pass 0.1349 202 0 .0 Pass 0.1369 191 0 .0 Pass 0.1390 175 0 .0 Pass 0.1411 165 0 .0 Pass 0.1431 158 0 .0 Pass 0.1452 152 0 .0 Pass 0.1472 146 0 .0 Pass 0.1493 141 0 .0 Pass 0.1514 138 0 .0 Pass 0.1534 133 0 .0 Pass 0.1555 122 0 .0 Pass 0.1576 115 0 .0 Pass 0.1596 109 0 .0 Pass 0.1617 109 0 .0 Pass 0.1638 98 0 .0 Pass 0.1658 90 0 .0 Pass 0.1679 89 0 .0 Pass 0.1699 81 0 .0 Pass 0.1720 71 0 .0 Pass 0.1741 69 0 .0 Pass 0.1761 63 0 .0 Pass 0.1782 60 0 .0 Pass 0.1803 57 0 .0 Pass 0.1823 54 0 .0 Pass 0.1844 48 0 .0 Pass 0.1865 47 0 .0 Pass 0.1885 44 0 .0 Pass 0.1906 40 0 .0 Pass 0.1926 39 0 .0 Pass 0.1947 36 0 .0 Pass 0.1968 33 0 .0 Pass 0.1988 28 0 .0 Pass 0.2009 27 0 .0 Pass 0.2030 24 0 .0 Pass 0.2050 20 0 .0 Pass 0.2071 20 0 .0 Pass 0.2092 19 0 .0 Pass 0.2112 16 0 .0 Pass 0.2133 16 0 .0 Pass 0.2153 16 0 .0 Pass 0.2174 16 0 .0 Pass 0.2195 15 0 .0 Pass 0.2215 13 0 .0 Pass 0.2236 12 0 .0 Pass 0.2257 12 0 .0 Pass 0.2277 10 0 .0 Pass 0.2298 9 0 .0 Pass 0.2319 8 0 .0 Pass 0.2339 8 0 .0 Pass 0.2360 8 0 .0 Pass 0.2380 8 0 .0 Pass 0.2401 7 0 .0 Pass 0.2422 7 0 .0 Pass 0.2442 5 0 .0 Pass 0.2463 5 0 .0 Pass 0.2484 5 0 .0 Pass 0.2504 5 0 .0 Pass 0.2525 5 0 .0 Pass 0.2546 5 0 .0 Pass 0.2566 5 0 .0 Pass 0.2587 5 0 .0 Pass 0.2608 5 0 .0 Pass 0.2628 5 0 .0 Pass 0.2649 5 0 .0 Pass 0.2669 5 0 .0 Pass 0.2690 4 0 .0 Pass 0.2711 4 0 .0 Pass 0.2731 2 0 .0 Pass 0.2752 2 0 .0 Pass 0.2773 2 0 .0 Pass 0.2793 2 0 .0 Pass 0.2814 1 0 .0 Pass 0.2835 1 0 .0 Pass 0.2855 1 0 .0 Pass 0.2876 1 0 .0 Pass 0.2896 1 0 .0 Pass 0.2917 1 0 .0 Pass 0.2938 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.026 acre-feet On-line facility target flow: 0.1 cfs. Adjusted for 15 min: 0.11 cfs. Off-line facility target flow: 0.07 c£s. Adjusted for 15 min: 0.08 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages 1QU kk7',~~;<k:*kk}!?~?4C7~'*i'it33A0},'.+~ppptkkYskkkk .-., '~ 1.0 tt ..,. Qf ~ ~po~ooo'6fp Predeveloped y 10E-1 x DeveMopec~tditigated +n x C3 10E-2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Prababili Yearly Peaks for Predeveloped Flow Frequency Chart o Predeveloped 4 ~ x Developed ouiC~ Facdity~ 035 ~ .~ _ ...._ .. e ~ 027 ~ ~~ ~ - v- `""' 020 __ _ _ _ _ __._...- Qi !T ~ 013 - -- - _ _ __. _ ~ _ . L U _H 10E•5 ~ 10E•d 10E•3 10E•2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph Tf,AR fIOW (cts) 1110 1138 ~;} ~~, ', ;~, 50 7701 ~~ `° `j~ ~ ~ ~ x ffit i .~ 3~i ; > ~ 3 ' ~S 25 °5~ „r ~ I 1# ~ j< i~~; ~~ ~ j' ~ '.~ 3 =~ lj i ~i ,~ r; 10 2 681 - ^ ; _.,.~....• x ,~, 3 ~1 51$ -~ ~ ~~( ~, 2 5+~9 -~_' ~ a , early Peaks for Developed W/Pond CLEARHIS BSN F1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN F1 0 11 8 00 BSN F1 0 19 8 00 BSN F1 0 31 8 00 BSN F1 0 37 8 00 BSN F1 0 40 8 00 BSN F1 0 43 8.00 yr Drainage Area: BSN F1 Hyd Method SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.1025 ac 78 00 Impervious 0.4210 ac 98.00 Total 0.5235 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0386 0 52 SBUH/SCS TYPEIA 6 mo 0 0664 0 52 SBUH/SCS TYPE1A 2 yr 0 1068 0 52 SBUH/SCS TYPEIA 10 yr 0 1274 0 52 SBUH/SCS TYPEIA 25 yr 0 1378 0 52 SBUH/SCS TYPEIA 50 yr 01482 0.52 SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs: 0 20 Intv• 10 00 min TC 0 03 hrs 010 hrs 0.1025 ac 0.2907 ac 0 0500 ac 0.0803 ac Length Slope: Coeff: Travel Time 6 00 ft 2 00% 0.2400 1.90 min Length: Slope. Coeff. Travel Time 330 00 ft 0.50% 27 0000 3 83 mm 18.50 ft 2 00% 0 0110 0 40 min 100 00 ft 0 50% 21 0000 1.12 min 500 ft 200% 00110 0.14 min 20 00 ft 2.00% 0 0110 0.42 min ~,w , ,,. ~~ ,.~ MOVEHYD [BSN F1] TO [BSN F1 - 6 mo] AS [6 mo] Peak Flow. 0 1125 cfs Peak Time: 8 00 hrs Hyd Vol: 1679 87 cf - 0 0386 acft MOVEHYD [BSN F1] TO [BSN F1 - 2 yr) AS [2 yr] Peak Flow 0.1923 cfs Peak Time. 8 00 hrs Hyd Vol 2891.63 cf - 0.0664 acft MOVEHYD [BSN F1) TO [BSN F1 - 10 yr] AS [10 yr) Peak Flow: 0.3083 cfs Peak Time• 8.00 hrs Hyd Vol 4650.47 cf - 0.1068 acft MOVEHYD [BSN F1] TO [BSN F1 - 25 yr] AS (25 yr] Peak Flow. 0 3673 cfs Peak Time• 8 00 hrs Hyd Vol 5549.24 cf - 0.1274 acft MOVEHYD [BSN F1] TO [BSN F1 - 50 yr] AS [50 yr] Peak Flow: 0.3970 cfs Peak Time 8.00 hrs Hyd Vol 6001 69 cf - 0 1378 acft MOVEHYD [BSN F1] TO [BSN F1 - 100 yr] AS [100 yr] Peak Flow• 0.4268 cfs Peak Time: 8 00 hrs Hyd Vol 6456 02 cf - 0.1482 acft Hydrograph ID: BASIN F - 6 mo Area: 0.5235 ac Hyd Int 10 00 min Base Flow Peak Flow: 0.1125 cfs Peak Time: 8 00 hrs Hyd Vol• 0.0386 acft Hydrograph ID: BASIN F - 100 yr Area• 0.5235 ac Hyd Int: 10 00 min Base Flow: Peak Flow 0 4268 cfs Peak Time 8 00 hrs Hyd Vol: 0 1482 acft Time Flow Time Ftow Time Flow hr cfs hr cfs hr cfs 0 67 0 0012 8 67 0 1812 16 50 0 0599 0 83 0 0049 8 83 0 1548 16 67 0 0599 1 00 0.0095 9 00 0 1539 16 83 0 0600 1 17 0 0147 9 17 0 1349 17 00 0 0600 1 33 0.0198 9 33 0 1166 17 17 0 0580 1 50 0 0233 9 50 0 1162 17 33 0 0561 1 67 0 0272 9 67 0 1102 17 50 0 0561 1 83 0 0307 9 83 0 1049 17 67 0 0561 2 00 0 0331 10 00 0 1049 17 83 0 0561 2 17 0 0361 10 17 0 0991 18 00 0 0561 2 33 0 0390 10 33 0 0936 18 17 0 0541 2 50 0 0407 10 50 0 0936 18 33 0 0522 2 67 0 0420 10 67 0 0897 18 50 0 0522 2 83 0 0432 10 83 0 0861 18 67 0 0522 3 00 0 0442 11 00 0 0861 18 83 0 0522 3 17 0 0450 11 17 0 0841 19 00 0 0522 3 33 0 0458 11 33 0 0823 19 17 0 0502 3 50 0 0464 11 50 0 0824 19 33 0 0483 3 67 0 0484 11 67 0 0804 19 50 0 0483 3 83 0 0504 11 83 0 0786 19 67 0 0482 4 00 0 0511 12 00 0 0786 19 83 0 0483 4 17 0 0544 12 17 0 0767 20 00 0 0483 4 33 0 0579 12 33 0 0749 20 17 0 0483 4 50 0 0586 12 50 0 0749 20 33 0 0483 4 67 0 0619 12 67 0 0729 20 50 0 0483 4 83 0 0656 12 83 0 0711 20 67 0 0483 5 00 0 0666 13 00 0 0711 20 83 0 0483 5 17 0 0703 13 17 0 0711 21 00 0 0483 5 33 0 0742 13 33 0 0712 21 17 0 0484 5 50 0.0752 13 50 0 0712 21 33 0 0484 5 67 0 0790 13.67 0 0693 21 50 0 0484 5 83 0 0829 13 83 0 0674 21 67 0 0484 6 00 0 0839 14 00 0 0674 21 83 0 0484 6 17 0 0910 14 17 0 0674 22 00 0 0484 6 33 0 0984 14 33 0 0675 22 17 0 0464 6 50 0 0996 14 50 0 0675 22 33 0 0445 6 67 0 1103 14 67 0 0656 22 50 0 0445 6 83 0 1214 14 83 0 0637 22 67 0 0444 7 00 0 1229 15 00 0 0637 22 83 0 0444 7 17 0 1358 15 17 0 0636 23 00 0 0444 7 33 0 1490 15 33 0 0637 23 17 0 0445 7 50 0 1508 15 50 0 0637 23 33 0 0445 7 67 0 2804 15 67 0 0618 23 50 0 0445 7 83 0 4149 15 83 0 0599 23 67 0 0445 8.00 0.4268 16 00 0 0599 23 83 0 0445 8 17 0 3230 16 17 0 0598 24 00 0 0445 8 33 0 2140 16 33 0 0599 24 17 0.0222 8 50 0 2112 16 50 0 0599 24 33 0 0017 Hydrograph ID: BASIN F - 100 yr Area. 0.5235 ac Hyd Int 10 00 min Base Flow• Peak Flow: 0.4268 cfs Peak Tlme. 8 00 hrs Hyd Vol• 0 1482 acft MOVEHYD [BASIN F] TO [BASIN F - 6 mo] AS [6 mo] Peak Flow. 0 1125 cfs Peak Time: 8.00 hrs Hyd Vol: 1679 87 cf - 0.0386 acft MOVEHYD [BASIN F] TO [BASIN F - 100 yr] AS [100 yr] Peak Flow• 0 4268 cfs Peak Time: 8.00 hrs Hyd Vol: 6456 02 cf - 0.1482 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 331.0000 ft 337.0000 ft 0.10 Infll: 10.00 in/hr Multiplier: 1.00 Reach fD: BIOSWALE F Section Properties: Shape• Ditch Size Material Manrnngs n Corr Metal -n ormal Length Slope Entrance Loss 70 0000 ft 1.00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3 OOh:1 v Up Node Dn Node Up Invert DUMMY F 0.0000 ft Conduit Constraints: Min Vel Max Vel Mln Cov 0 50000 ft 1.0000 ft 3.0000 ft In/Exfll Hold Up Hold Dn O.000OIn/hr NO NO Conduit Sum mary: Trib Area Flow Capacity 0 0000 ac 0 0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0 000000 ft 0.000000 ft Routing Method: Travel Time Translation Hyd params By 0.0250 Manrnngs Formula ss2 3.OOh 1v Dn Invert 0 0000 ft Mln Slope Max Slope Min drop 0.5000 ft 1.0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0 0000 ft/s 0.0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN F - 6 MO] THRU (BIOSWALE F] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 1690 ---- 1 00 0 0873 Ditch 0.5672 ----- BASIN F ROUTEHYD [BASIN F - 100 YR] THRU (BIOSWALE F] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 6766 ---- 1 00 0 1882 Ditch 0 9148 ----- BASIN F Node ID: INFILTRATION F Desc: Manhole structure Start EI• 337.0000 ft Max EI. 338 0000 ft Contrib Basin: Contnb Hyd• Length Width Void Ratio 70.0000 ft 10.0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN F RPL Desc. Manhole structure Start EI 337.0000 ft Max EI 338 0000 ft Contrib Basin Contnb Hyd: Storage Id: INFILTRATION F Discharge Id INFILTRATION RLPCOMPUTE [BASIN F RPL] SUMMARY 100 YR MatchQ=PeakQ= 0 6766 cfs Peak Out Q 0.2233 cfs -Peak Stg. 338.31 ft - Active Vol 1078 94 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -F Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin F Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 DEVELOPED LAND USE Basin Basin F Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 0.73 IMPERVIOUS: 0.71 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale F Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Pimana~nnc Depth: aft. Bottom Length: 70ft. Bottom Width loft. Side slope 1: 3 To 1 Sa.de slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.009 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 336.5 0.016 0.000 0.000 0.000 336.6 0.017 0.001 0.000 0.162 336.7 0.018 0.003 0.000 0.162 336.7 0.019 0.004 0.000 0.162 336.8 0.019 0.006 0.000 0.162 ~ ,, ~', ~~g6PH Dq~Y~ ~ wasy ~ y` q~~o ,(c° 04 '~ ._~~y~,~ ,~ ~~C,ST=F µ~ ~l ~ ~~ to f ~~~ 0922 - DS E?CPiRES• !~ . ~~ ~. 336.9 0.020 0.007 0.000 0.162 337.0 0.021 0.009 0.000 0.162 337.0 0.022 0.010 0.411 0.162 337.1 0.023 0.012 1.873 0.162 337.2 0.024 0.014 3.920 0.162 337.3 0.024 0.016 6.416 0.162 337.4 0.025 0.018 9.292 0.162 337.4 0.026 0.020 12.50 0.162 337.5 0.027 0.022 16.01 0.162 337.6 0.028 0.024 19.81 0.162 337.7 0.029 0.026 23.86 0.162 337.7 0.030 0.028 28.15 0.16?_ 337.8 0.037 0.031 32_.67 0.]62_ 337.9 0.031 0.033 37.42 0.162. 338.0 0.032 0.036 92.37 0.162 338.1 0.033 0.038 47.53 0.162 338.1 0.034 0.041 52.88 0.162 338.2 0.035 0.043 58.41 0.162 338.3 0.036 0.046 64.13 0.162 338.4 0.037 0.049 70.02 0.162 338.4 0.038 0.052 76.08 0.162 338.5 0.039 0.055 82.31 0.162 338.6 0.040 0.058 88.70 0.162 338.7 0.041 0.061 95.24 0.162 338.8 0.042 0.064 101.9 0.162 338.8 0.043 0.068 108.8 0.162 338.9 0.044 0.071 115.8 0.162 339.0 0.095 0.079 122_.9 0.162 339.1 0.096 0.078 130.2 0.162 339.1 0.047 0.081 137.6 0.162 339.2 0.048 0.085 145.2 0.162 339.3 0.049 0.089 152.9 0.162 339.4 0.050 0.093 160.7 0.162 339.5 0.051 0.097 168.6 0.162 339.5 0.052 0.101 176.7 0.162 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.178928 5 year 0.218359 10 year 0.242855 25 year 0.272471 50 year 0.293769 100 year 0.314542 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Unmitigated Flow (cfs) 0.178928 0.218359 0.242855 0.272471 0.293769 0.314542 Pera.ods for Developed Mitigated Flow(cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.171 0.000 1957 0.273 0.116 1958 0.157 0.000 1959 0.182 0.000 1960 0.201 0.000 1961 0.135 0.000 1962 0.144 0.000 1963 0.294 0.070 1964 0.210 0.001 1965 0.198 0.000 1966 0.139 0.000 1967 0.172 0.000 1968 0.133 0.000 1969 0.131 0.000 1970 0.131 0.000 1971 0.163 0.000 1972 0.200 0.012 1973 0.159 0.000 1974 0.180 0.000 1975 0.156 0.000 1976 0.180 0.000 1977 0.227 0.022 1978 0.193 0.000 1979 0.229 0.000 1980 0.172 0.000 1981 0.197 0.024 1982 0.227 0.000 1983 0.243 0.053 1984 0.149 0.000 1985 0.172 0.000 1986 0.192 0.006 1987 0.210 0.037 1988 0.114 0.000 1989 0.136 0.000 1990 0.269 0.100 1991 0.280 0.106 1992 0.167 0.000 1993 0.123 0.000 1994 0.136 0.000 1995 0.197 0.021 1996 0.200 0.022 1997 0.161 0.000 1998 0.226 0.000 1999 0.194 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.2798 0.1057 2 0.2729 0.0999 3 0.2690 0.0696 4 0.2434 0.0533 5 0.2293 0.0366 6 0.2274 0.0294 7 0.2268 0.0224 8 0.2260 0.0217 9 0.2099 0.0207 10 0.2096 0.0121 11 0.2007 0.0057 12 0.2004 0.0007 13 0.2002 0.0005 14 0.1984 0.0000 15 0.1973 0.0000 16 0.1972 0.0000 17 0.1941 0.0000 18 0.1926 0.0000 19 0.1924 0.0000 20 0.1824 0.0000 21 0.1798 0.0000 2z 0.1796 0.0000 23 0.1720 0.0000 24 0.1720 0.0000 25 0.1718 0.0000 26 0.1709 0.0000 27 0.1673 0.0000 28 0.1632 0.0000 29 0.1613 0.0000 30 0.1565 0.0000 31 0.1556 0.0000 32 0.1542 0.0000 33 0.1988 0.0000 34 0.1440 0.0000 35 0.1387 0.0000 36 0.1362 0.0000 37 0.1362 0.0000 38 0.1397 0.0000 39 0.1332 0.0000 40 0.1314 0.0000 41 0.1312 0.0000 42 0.1226 0.0000 43 0.1138 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.0895 1099 5 .0 Pass 0.0915 979 5 .0 Pass 0.0936 915 5 .0 Pass 0.0957 848 5 .0 Pass 0.0977 788 5 .0 Pass 0.0998 728 5 .0 Pass 0.1018 680 3 .0 Pass 0.1039 627 3 .0 Pass 0.1060 594 3 .0 Pass 0.1080 528 1 .0 Pass 0.1101 492_ 1 .0 Pass 0.1122 456 1 .0 Pass 0.1142 922 1 .0 Pass 0.1163 388 0 .0 Pass 0.1184 356 0 .0 Pass 0.1204 335 0 .0 Pass 0.1225 316 0 .0 Pass 0.1245 299 0 .0 Pass 0.1266 276 0 .0 Pass 0.1287 257 0 .0 Pass 0.1307 241 0 .0 Pass 0.1328 222 0 .0 Pass 0.1349 202 0 .0 Pass 0.1369 191 0 .0 Pass 0.1390 175 0 .0 Pass 0.1411 165 0 .0 Pass 0.1431 158 0 .0 Pass 0.1452 152 0 .0 Pass 0.1472 146 0 .0 Pass 0.1493 191 0 .0 Pass 0.1519 138 0 .0 Pass 0.1534 133 0 .0 Pass 0.1555 122 0 .0 Pass 0.1576 115 0 .0 Pass 0.1596 109 0 .0 Pass 0.1617 104 0 .0 Pass 0.1638 98 0 .0 Pass 0.1658 90 0 .0 Pass 0.1679 89 0 .0 Pass 0.1699 81 0 .0 Pass 0.1720 71 0 .0 Pass 0.1741 69 0 .0 Pass 0.1761 63 0 .0 Pass 0,.1782 60 0 .0 Pass 0.1803 57 0 .0 Pass 0.1823 54 0 .0 Pass 0.1844 48 0 .0 Pass 0.1865 47 0 .0 Pass 0.1885 49 0 .0 Pass 0.1906 40 0 .0 Pass 0.1926 39 0 .0 Pass 0.1997 36 0 .0 Pass 0.1968 33 0 .0 Pass 0.1988 28 0 .0 Pass 0.2009 27 0 .0 Pass 0.2030 29 0 .0 Pass 0.2050 20 0 .0 Pass 0.2071 20 0 .0 Pass 0.2092 19 0 .0 Pass 0.2112 16 0 .0 Pass 0.2133 16 0 .0 Pass 0.2153 16 0 .0 Pass 0.2174 16 0 .0 Pass 0.2195 15 0 .0 Pass 0.2215 13 0 .0 Pass 0.2236 12 0 .0 Pass 0.2257 12 0 .0 Pass 0.2277 10 0 .0 Pass 0.2298 9 0 .0 Pass 0.2319 8 0 .0 Pass 0.2339 8 0 .0 Pass 0.2360 8 0 .0 Pass 0.2380 8 0 .0 Pass 0.2401 7 0 .0 Pass 0.2422 7 0 .0 Pass 0.2442 5 0 .0 Pass 0.2463 5 0 .0 Pass 0.2984 5 0 .0 Pass 0.2504 5 0 .0 Pass 0.2525 5 0 .0 Pass 0.2546 5 0 .0 Pass 0.2566 5 0 .0 Pass 0.2587 5 0 .0 Pass 0.2608 5 0 .0 Pass 0.2628 5 0 .0 Pass 0.2649 5 0 .0 Pass 0.2669 5 0 .0 Pass 0.2690 4 0 .0 Pass 0.2711 4 0 .0 Pass 0.2731 2 0 .0 Pass 0.2752 2 0 .0 Pass 0.2773 2 0 .0 Pass 0.2793 2 0 .0 Pass 0.2814 1 0 .0 Pass 0.2835 1 0 .0 Pass 0.2855 1 0 .0 Pass 0.2876 1 0 .0 Pass 0.2896 1 0 .0 Pass 0.2917 1 0 .0 Pass 0.2938 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.026 acre-feet On-line facility target flow: 0.1 c£s. Adjusted for 15 min: 0.11 cfs. Off-line facility target flow: 0.07 cfs. Adjusted £or 15 min: 0.08 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~QO ~Bkhk}xkkkkhYY~S-0:4+rK~P}Ay~pGskkhkkkk ~ 1.0 U ... 41 ~ ~sfJbOb 4 oA~+ ~ Qvo~r~o~bo4'~~ Predeveloped ,c toE-t x Uevelopec~iditigated ~ ~x O 10E2 1 10 20 30 d0 50 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart ~ o Predeveloped ~ q x Developed witlr Facil~y PEAR FIOW fds) 11~ 1138 ~? 3, _', ~~ ~ , 50 7 781 ~ ~ ~ j ` ° i#; 1 ~, ; ~~ 25 5 ~ ~ ~ ( F ' _ ~ ~ , 10 ~ 2 681 '"" £ ~_;' •----~ 3 = , i 5 .1518 ` r 1 ~° _ 2 "5439 ~ 1 . 035 .." .. .. ~ 0 27 " v- V +v ~ A 13 -. __ ~ ___ ~ _~ _ _ ~- r V _N 16E•5 ~ 10E•4 10E•3 10f:~2 10E-1 1 10 Percent Exceeding Duration Graoh "early Peaks for Developed W/Pond Yearly Peaks for developed W/O Pond CLEARHIS BSN F1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN F1 0 11 8 00 BSN F1 0 19 8 00 BSN F1 0 31 8 00 BSN F1 0.37 8 00 BSN F1 0 40 8 00 BSN F1 0 43 8 00 yr Drainage Area: BSN F1 Hyd Method: SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.1025 ac 78.00 Impervious 0 4210 ac 98.00 Total 0.5235 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description: Sheet Across Planter Strip Impervious TC Data: Flow type' Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0386 0 52 SBUH/SCS TYPEIA 6 mo 0 0664 0 52 SBUH/SCS TYPEIA 2 yr 0 1068 0 52 SBUHlSCS TYPE1A 10 yr 0 1274 0 52 SBUH/SCS TYPEIA 25 yr 0 1378 0 52 SBUH/SCS TYPEIA 50 yr 0 1482 0 52 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS Abs. 0 20 Intv: 10 00 min TC 0.03 hrs 010 hrs 0.1025 ac 0.2907 ac 0.0500 ac 0 0803 ac Length: Slope. Coeff. Travel Time 6 00 ft 2.00% 0.2400 1 90 min Length• Slope: Coeff: Travel Time 330.00 ft 0 50% 27 0000 3.83 min 1850 ft 200% 00110 040 min 100 00 ft 0 50% 21 0000 1 12 min 500 ft 200% 00110 0.14 min 20 00 ft 2.00% 0.0110 0 42 min MOVEHYD [BSN F1] TO [BSN F1 - 6 mo] AS [6 mo] Peak Flow: 0 1125 cfs Peak Time. 8 00 hrs Hyd Vol. 1679 87 cf - 0 0386 acft MOVEHYD [BSN F1] TO [BSN F1 - 2 yr] AS [2 yr] Peak Flow 0 1923 cfs Peak Time: 8 00 hrs Hyd Vol. 2891.63 cf - 0.0664 acft MOVEHYD [BSN F1] TO [BSN F1 - 10 yr] AS [10 yr] Peak Flow• 0.3083 cfs Peak Time• 8.00 hrs Hyd Vol 4650 47 cf - 0 1068 acft MOVEHYD [BSN F1] TO [BSN F1 - 25 yr] AS [25 yr] Peak Flow: 0 3673 cfs Peak Time. 8 00 hrs Hyd Vol 5549.24 cf - 0 1274 acft MOVEHYD [BSN F1] TO (BSN F1 - 50 yr] AS [50 yr] Peak Flow• 0 3970 cfs Peak Time 8.00 hrs Hyd Vol 6001 69 cf - 0.1378 acft ~~v , ,~. ,fit , MOVEHYD [BSN F1] TO [BSN F1 - 100 yr] AS [100 yr] Peak Flow: 0.4268 cfs Peak Time. 8 00 hrs Hyd Vol 6456 02 cf - 0 1482 acft Hydrograph ID: BASIN F - 6 mo Area. 0.5235 ac Hyd Int 10 00 mm Base Flow: Peak Flow: 0 1125 cfs Peak Time• 8.00 hrs Hyd Vol: 0.0386 acft Hydrograph ID: BASIN F - 100 yr Area: 0 5235 ac Hyd Int• 10 00 min Base Flow Peak Flow 0.4268 cfs Peak Time: 8.00 hrs Hyd Vol• 0 1482 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0012 8 67 0 1812 16 50 0 0599 0 83 0 0049 8 83 0 1548 16 67 0 0599 1 00 0 0095 9 00 0 1539 16 83 0 0600 1 17 0 0147 9 17 0 1349 17 00 0 0600 1 33 0 0198 9 33 0 1166 17 17 0 0580 1 50 0 0233 9 50 0 1162 17 33 0 0561 1 67 0 0272 9 67 0 1102 17 50 0 0561 1 83 0 0307 9 83 0 1049 17 67 0 0561 2 00 0 0331 10 00 0 1049 17 83 0 0561 2.17 0 0361 10 17 0 0991 18 00 0.0561 2 33 0 0390 10 33 0 0936 18 17 0.0541 2 50 0 0407 10 50 0 0936 18 33 0 0522 2 67 0 0420 10 67 0 0897 18 50 0 0522 2 83 0 0432 10 83 0 0861 18.67 0 0522 3 00 0 0442 11 00 0 0861 18 83 0.0522 3 17 0 0450 11 17 0 0841 19 00 0 0522 3 33 0 0458 11 33 0 0823 19.17 0 0502 3 50 0 0464 11 50 0 0824 19 33 0 0483 3 67 0 0484 11 67 0 0804 19 50 0 0483 3 83 0 0504 11 83 0 0786 19 67 0 0482 4 00 0 0511 12 00 0 0786 19 83 0 0483 4 17 0 0544 12 17 0 0767 20 00 0 0483 4 33 0 0579 12 33 0 0749 20 17 0 0483 4 50 0 0586 12 50 0 0749 20 33 0 0483 4.67 0 0619 12 67 0 0729 20 50 0 0483 4 83 0 0656 12 83 0 0711 20.67 0 0483 5 00 0 0666 13 00 0 0711 20 83 0 0483 5 17 0 0703 13 17 0 0711 21 00 0 0483 5 33 0 0742 13 33 0 0712 21 17 0 0484 5 50 0 0752 13 50 0 0712 21 33 0 0484 5 67 0 0790 13 67 0 0693 21 50 0 0484 5 83 0 0829 13 83 0 0674 21 67 0 0484 6 00 0 0839 14 00 0 0674 21 83 0 0484 6 17 0 0910 14 17 0 0674 22 00 0 0484 6 33 0 0984 14 33 0 0675 22 17 0 0464 6 50 0 0996 14 50 0 0675 22 33 0 0445 6 67 0 1103 14 67 0 0656 22 50 0 0445 6.83 0 1214 14 83 0 0637 22 67 0 0444 7 00 0 1229 15 00 0 0637 22 83 0 0444 7 17 0 1358 15 17 0 0636 23 00 0 0444 7 33 0 1490 15 33 0 0637 23 17 0 0445 7 50 0 1508 15 50 0 0637 23 33 0 0445 7 67 0 2804 15 67 0 0618 23 50 0 0445 7 83 0 4149 15 83 0 0599 23 67 0 0445 8 00 0 4268 16 00 0 0599 23 83 0 0445 8 17 0 3230 16 17 0 0598 24 00 0 0445 8 33 0 2140 16 33 0 0599 24 17 0 0222 8 50 0 2112 16 50 0 0599 24 33 0 0017 0 Hydrograph ID: BASIN F - 100 yr Area: 0 5235 ac Hyd Int 10 00 min Base Flow• Peak Flow: 0.4268 cfs Peak Time• 8 00 hrs Hyd Vol 0.1482 acft MOVEHYD [BASIN F] TO [BASIN F - 6 mo] AS [6 mo] Peak Flow: 0.1125 cfs Peak Time• 8.00 hrs Hyd Vol 1679.87 cf - 0.0386 acft MOVEHYD [BASIN F] TO [BASIN F - 100 yr] AS [100 yr] Peak Flow• 0 4268 cfs Peak Time. 8.00 hrs Hyd Vol 6456 02 cf - 0.1482 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 331 0000 ft 337 0000 ft 0.10 Infil• 10.00 in/hr Multiplier 1 00 Reach ID: BIOSWALE F Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -n ormal Length Slope Entrance Loss 70.0000 ft 1 00 Width Bank Hgt ss1 10.0000 ft 3.0000 ft 3.OOh•1v Up Node Dn Node Up Invert DUMMY F 0.0000 ft Conduit Constraints: Min Vel Max Vel Min Cov 0 50000 ft 1.0000 ft 3 0000 ft In/Exfil Hold Up Hold Dn 0 0000 in/hr NO NO Conduit Sum mary: Trib Area Flow Capacity 0.0000 ac 0.0000 cf 0 0000 cf Ent Loss Exit Loss Frict Loss 0.000000 ft 0.000000 ft 0.000000 ft Routing Method. Travel Time Translation Hyd params By 0 0250 Mannings Formula ss2 3 OOh 1v Dn Invert 0 0000 ft Min Slope Max Slope Min drop 0 5000 ft 1 0000 ft 0.0000 ft Match Inv Allow Smaller YES NO Velocity Normal Depth 0.0000 ft/s 0 0000 ft Start TW 0 0000 ft ROUTEHYD [BASIN F - 6 MO] THRU [BIOSWALE F] USING THUR100Y AND [6 MO ]ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 1690 ---- 1 00 0 0873 Ditch 0.5672 ----- BASIN F ROUTEHYD [BASIN F - 100 YR] THRU [BIOSWALE F] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE F 0 8483 0 6766 ---- 1 00 0 1882 Ditch 0 9148 ----- BASIN F Node ID: INFILTRATION F Desc~ Manhole structure Start EI~ 337 0000 ft Max EI: 338.0000 ft Contrib Basin: Contrib Hyd Length Width Void Ratio 70.0000 ft 10 0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN F RPL Desc. Manhole structure Start EI: 337.0000 ft Max EI: 338 0000 ft Contrib Basin. Contrib Hyd Storage Id. INFILTRATION F Discharge Id. INFILTRATION RLPCOMPUTE [BASIN F RPL] SUMMARY 100 YR MatchO=PeakO= 0.6766 cfs Peak Out Q 0.2233 cfs -Peak Stg: 338.31 ft - Active Vol: 1078.94 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -E Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin E Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 DEVELOPED LAND USE Basin Basin E Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale E Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Raa.n / Evap is not activated. n, ,., e„ ~ , ,.., nepth: aft. Bottom Length: 70ft. Bottom Width 16ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. 0.014 acre-ft. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 339.8 0.026 0.000 0.000 0.000 334.9 0.027 0.002 0.000 0.259 335.0 0.027 0.004 0.000 0.259 335.0 0.028 0.006 0.000 0.259 335.1 0.029 0.009 0.000 0.259 F~ e . .. _`l .. ' ` ,e '~°N~~s'~ 09- 22-OS IXPtRFS: It-22- 335.2 0.030 0.011 0.000 0.259 335.3 0.031 0.013 0.000 0.2_59 335.3 0.032 0.016 0.411 0.259 335.4 0.033 0.018 1.873 0.259 335.5 0.033 0.021 3.920 0.259 335.6 0.034 0.023 6.416 0.7.59 335.7 0.035 0.026 9.292 0.259 335.7 0.036 0.029 12.50 0.259 335.8 0.037 0.032 16.01 0.259 335.9 0.038 0.035 19.81 0.259 336.0 0.039 0.038 23.86 0.259 336.0 0.040 0.041 28.15 0.259 336.1 0.091 0.049 32.67 0.259 336.2 0.092 0.047 37.42 0.259 336.3 0.043 0.050 42.37 0.259 336.4 0.044 0.054 47.53 0.259 336.4 0.095 0.057 52.88 0.259 336.5 0.046 0.061 58.41 0.259 336.6 0.046 0.064 64.13 0.259 336.7 0.047 0.068 70.02 0.259 336.7 0.098 0.072 76.08 0.259 336.8 0.049 0.075 82.31 0.259 336.9 0.050 0.079 88.70 0.259 337.0 0.051 0.083 95.24 0.259 337.1 0.052 0.087 101.9 0.259 337.1 0.053 0.091 108.8 0.259 337.2 0.054 0.095 115.8 0.259 337.3 0.055 0.100 122.9 0.259 337.4 0.056 0.104 130.2 0.259 337.4 0.057 0.109 137.6 0.259 337.5 0.058 0.113 145.2 0.259 337.6 0.059 0.118 152.9 0.259 337.7 0.060 0.122 ]60.7 0.259 337.8 0.062 0.127 168.6 0.259 337.8 0.063 0.132 176.7 0.259 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389968 50 year 0.420113 100 year 0.450018 Flow Frequency Return Return Pera.od 2 year 5 year 10 year 25 year 50 year 100 year Flow Frequency Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Flow (cfs) 0.255069 0.311678 0.346879 0.389468 0.420113 0.450018 Developed Unmitigated Return Periods for Developed Mita.gated Flow (cfs) 0.54587 1.518176 2.680528 5.094867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.245 0.000 1957 0.389 0.127 1958 0.223 0.000 1959 0.259 0.000 1960 0.286 0.000 1961 0.193 0.000 1962 0.205 0.000 1963 0.922 0.077 1964 0.299 0.000 1965 0.283 0.000 1966 0.]97 0.000 1967 0.241 0.000 1968 0.190 0.000 1969 0.187 0.000 1970 0.187 0.000 1971 0.232 0.000 1972 0.290 0.000 1973 0.219 0.000 1974 0.256 0.000 1975 0.221 0.000 1976 0.256 0.000 1977 0.323 0.009 1978 0.274 0.000 1979 0.326 0.000 1980 0.245 0.000 1981 0.281 0.000 1982 0.323 0.000 1983 0.346 0.051 1984 0.212 0.000 1985 0.244 0.000 1986 0.275 0.000 1987 0.302 0.000 1988 0.162 0.000 1989 0.194 0.000 1990 0.383 0.092 1991 0.905 0.106 1992 0.238 0.000 1993 0.174 0.000 1999 0.194 0.000 1995 0.281 0.000 1996 0.285 0.000 1997 0.229 0.000 1998 0.321 0.000 1999 0.276 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4046 0.1063 2 0.3891 0.0923 3 0.3833 0.0766 4 0.3463 0.0508 5 0.3262 0.0085 6 0.3235 0.0000 7 0.3226 0.0000 8 0.3215 0.0000 9 0.3017 0.0000 10 0.2987 0.0000 11 0.2896 0.0000 12 0.2856 0.0000 13 0.2898 0.0000 14 0.2833 0.0000 15 0.2811 0.0000 16 0.2806 0.0000 17 0.2761 0.0000 18 0.2746 0.0000 19 0.2791 0.0000 20 0.2594 0.0000 0.2562 0.0000 0.2555 0.0000 0.2467 0.0000 0.2451 0.0000 0.2447 0.0000 0.2443 0.0000 0.2380 0.0000 0.2324 0.0000 0.2295 0.0000 0.2230 0.0000 0.2214 0.0000 0.2194 0.0000 0.2119 0.0000 0.2049 0.0000 0.1973 0.0000 0.1938 0.0000 0.1937 0.0000 0.1925 0.0000 0.1897 0.0000 0.1869 0.0000 0.1866 0.0000 0.1744 0.0000 0.1619 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1275 1094 0 .0 Pass 0.1305 972 0 .0 Pass 0.1334 898 0 .0 Pass 0.1369 829 0 .0 Pass 0.1394 774 0 .0 Pass 0.1423 716 0 .0 Pass 0.1453 660 0 .0 Pass 0.1482 613 0 .0 Pass 0.1512 563 0 .0 Pass 0.1541 523 0 .0 Pass 0.1571 487 0 .0 Pass 0.1600 451 0 .0 Pass 0.1630 427 0 .0 Pass 0.1660 392 0 .0 Pass 0.1689 356 0 .0 Pass 0.1719 334 0 .0 Pass 0.1748 314 0 .0 Pass 0.1778 296 0 .0 Pass 0.1807 271 0 .0 Pass 0.1837 252 0 .0 Pass 0.1866 237 0 .0 Pass 0.1896 215 0 .0 Pass 0.1926 197 0 .0 Pass 0.1955 182 0 .0 Pass 0.1985 170 0 .0 Pass 0.2014 163 0 .0 Pass 0.2044 158 0 .0 Pass 0.2073 151 0 .0 Pass 0.2103 145 0 .0 Pass 0.2132 141 0 .0 Pass 0.2162 137 0 .0 Pass 0.2191 130 0 .0 Pass 0.22_21 119 0 .0 Pass 0.2251 112 0 .0 Pass 0.2280 107 0 .0 Pass 0.2310 101 0 .0 Pass 0.2339 94 0 .0 Pass 0.2369 89 0 .0 Pass 0.2398 86 0 .0 Pass 0.2428 78 0 .0 Pass 0.2457 73 0 .0 Pass 0.2487 70 0 .0 Pass 0.2517 65 0 .0 Pass 0.2546 61 0 .0 Pass 0.2576 57 0 .0 Pass 0.2605 52 0 .0 Pass 0.2635 47 0 .0 Pass 0.2664 47 0 .0 Pass 0.2694 43 0 .0 Pass 0.2723 40 0 .0 Pass 0.2753 37 0 .0 Pass 0.2783 34 0 .0 Pass 0.2812 29 0 .0 Fass 0.2842 27 0 .0 Pass 0.2871 25 0 .0 Pass 0.2901 24 0 .0 Pass 0.2930 21 0 .0 Pass 0.2960 20 0 .0 Pass 0.2989 19 0 .0 Pass 0.3019 17 0 .0 Pass 0.3099 16 0 .0 Pass 0.3078 16 0 .0 Pass 0.3108 16 0 .0 Pass 0.3137 19 0 .0 Pass 0.3167 12 0 .0 Pass 0.3196 12 0 .0 Pass 0.3226 11 0 .0 Pass 0.3255 9 0 .0 Pass 0.3285 8 0 .0 Pass 0.3315 8 0 .0 Pass 0.3349 8 0 .0 Pass 0.3374 8 0 .0 Pass 0.3403 8 0 .0 Pass 0.3433 7 0 .0 Pass 0.3462 7 0 .0 Pass 0.3492 5 0 .0 Pass 0.3521 5 0 .0 Pass 0.3551 5 0 .0 Pass 0.3581 5 0 .0 Pass 0.3610 5 0 .0 Pass 0.3690 5 0 .0 Pass 0.3669 5 0 .0 Pass 0.3699 5 0 .0 Pass 0.3728 5 0 .0 Pass 0.3758 5 0 .0 Pass 0.3787 5 0 .0 Pass 0.3817 5 0 .0 Pass 0.3846 4 0 .0 Pass 0.3876 4 0 .0 Pass 0.3906 2 0 .0 Pass 0.3935 2 0 .0 Pass 0.3965 2 0 .0 Pass 0.3994 2 0 .0 Pass 0.4024 2 0 .0 Pass 0.9053 1 0 .0 Pass 0.4083 1 0 .0 Pass 0.4112 1 0 .0 Pass 0.4142 1 0 .0 Pass 0.4172 1 0 .0 Pass 0.4201 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.024 acre-feet On-line facility target flow: 0.12 cfs. Adjusted £or 15 min: 0.19 cfs. Off-line facility target flow: 0.08 cfs. Adjusted for 15 min: 0.09 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~QO kkkYxkYkkkk.+.~f~6?S;gpikkhkkkk "~ 1.0 U ,.. tl1 t7! no©aoooapO '' ooQOO~~'`~JO~o Predevelo ed U 18E-1 x Det~elope[~tAitigated _N k O 10E-2 t 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Freauencv Chart ~ o Predeveloped ~ q x Developed w~ Facildp 4 35 ~ e .. ~ 027 - - ~ - - - v- (a ~-- o zo - - - ~- _ a m m ~ 013 -_ __ _~~ _. __~ .~__ __ _~ L v LO 10E•3 d 10E•d 1AE•3 10E•2 14E-1 i 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph YEAR FLOtU {cfs} 1Dtl 11 38 - .i ~~` =i ~~ SS , ~~ ;, LL J~ qq 3 fF r '~x 7l01 u ~ -. ~ ~ f ~}~ i~ ~ ~{ ~3 ~ ~ ~~> [ 25 „ ~ ~ jt i v ~l 3 3 3 5 ~ DYJ e ! 7 3 ~ 16 ..a~ ~ _.....d... ~ ~ ' ' i Z 681 .._.. _. ;'~ , 2 E ~._«. 545 .,. J early Peaks for Developed W/Pond CLEARHIS BSN E1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN E1 0.08 8 00 BSN E1 0 14 800 BSN E1 0 23 8 00 BSN E1 0 27 8 00 BSN E1 0 29 8 00 BSN E1 0 32 8 00 yr Drainage Area: BSN E1 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.1250 ac 78 00 Impervious 0.2906 ac 98.00 Total 0 4156 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description. Sheet Across Planter Strip Impervious TC Data: Flow type Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN E2 Event Summary: BasmlD Peak Q Peak T Event ------- (cfs) (hrs) BSN E2 0 09 7 83 BSN E2 0 16 7 83 BSN E2 0 26 7 83 BSN E2 0 31 7 83 BSN E2 0 34 7 g3 BSN E2 0 36 7 83 yr Drainage A rea: BSN E2 Hyd Method SBUH Hyd Peak Factor: 484 00 Storm Dur: 24 00 hrs Area CN Pervious 0.0986 ac 78 00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0273 0 42 SBUH/SCS TYPEIA 6 mo 0 0480 0 42 SBUH/SCS TYPEIA 2 yr 0 0788 0 42 SBUHlSCS TYPEIA 10 yr 0 0947 0 42 SBUH/SCS TYPEIA 25 yr 0 1027 0 42 SBUH/SCS TYPEIA 50 yr 0 1108 0 42 SBUH/SCS TYPEIA 100 Loss Method SCS Abs Inty~ TC 0.03 hrs 0.09 hrs SCS CN Number 0.20 10 00 min 0.1250 ac 0 2131 ac 0 0316 ac 0 0459 ac Length Slope Coeff. Travel Time 6 00 ft 2.00% 0.2400 1.90 min Length: Slope: Coeff. Travel Time 237.00 ft 0 50% 27.0000 2.75 min 18 50 ft 2 00% 0.0110 0.40 min 150.00 ft 0.50% 21.0000 1 68 min 5 00 ft 2.00% 0 0110 0.14 min 20 00 ft 2 00% 0 0110 0.42 mm Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0308 0 43 SBUHlSCS TYPEIA 6 mo 0 0534 0 43 SBUH/SCS TYPEIA 2 yr 0 0864 0 43 SBUH/SCS TYPEIA 10 yr 0 1033 0 43 SBUH/SCS TYPEIA 25 yr 0 1118 0 43 SBUH/SCS TYPEIA 50 yr 0 1204 0 43 SBUH/SCS TYPE1A 100 Loss Method SCS CN Number SCS Abs. 0.20 Inty~ 10.00 min TC 0 03 hrs Impervious 0.3341 ac 98.00 Total 0.4327 ac Supporting Data: Pervious CN Data: Type B Sods Hydraulic Group 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type: Description Sheet Across Planter Stnp Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway 0.05 hrs 0.0986 ac 0 2251 ac 0.0287 ac 0.0803 ac Length Slope: Coeff' Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length• Slope: Coeff• Travel Time 263 00 ft 3.28% 27 0000 0.90 min 1850 ft 200% 0.0110 040 min 100 00 ft 0.50% 21 0000 1.12 mm 5.00 ft 2 00% 0 0110 0 14 min 20 00 ft 2 00% 0.0110 0.42 min ADDHYD [BSN E1j AS [6 mo] [BSN E2] AS [6 mo] TO [BSN E1 +BSN E2] Peak Flow 0.1690 cfs Peak Time. 7 83 hrs Hyd Vol 2530.78 cf - 0 0581 acft ADDHYD [BSN E1] AS [2 yr] [BSN E2] AS [2 yr] TO [BSN E1 +BSN E2] Peak Flow: 0.2914 cfs Peak Time: 7.83 hrs Hyd Vol• 4417.21 cf - 0 1014 acft ADDHYD [BSN E1] AS [10 yr] [BSN E2] AS [10 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.4802 cfs Peak Time 7 83 hrs Hyd Vol• 7194 70 cf - 0.1652 acft ADDHYD [BSN E1] AS [25 yr] [BSN E2] AS [25 yr] TO [BSN E1 +BSN E2] Peak Flow• 0.5777 cfs Peak Time 7 83 hrs Hyd Vol• 8624.23 cf - 0 1980 acft ADDHYD [BSN E1] AS [50 yr) [BSN E2] AS [50 yr] TO [BSN E1 +BSN E2] Peak Flow 0.6270 cfs Peak Time: 7 83 hrs Hyd Vol 9345.61 cf - 0 2145 acft ADDHYD [BSN E1] AS [100 yr] [BSN E2] AS [100 yr] TO [BSN E1 +BSN E2] Peak Flow• 0.6766 cfs Peak Time. 7 83 hrs Hyd Vol: 10071.01 cf - 0 2312 acft Hydrograph ID: BASIN E Area. 0.8483 ac Hyd Int 10 00 mm Base Flow• Peak Flow. 0.6766 cfs Peak Time• 7.83 hrs Hyd Vol. 0 2312 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0022 8 67 0 2738 16 50 0 0953 0 83 0 0084 8 83 0 2360 16 67 0 0953 1 00 0 0154 9 00 0 2424 16 83 0 0954 1 17 0 0233 9 17 0 2057 17 00 0 0954 1 33 0 0307 9 33 0 1785 17 17 0 0917 1 50 0 0355 9 50 0 1833 17 33 0 0888 1 67 0 0414 9 67 0 1714 17 50 0.0893 1 83 0 0465 9 83 0 1638 17 67 0 0892 2 00 0 0496 10 00 0 1653 17 83 0 0893 2 17 0 0545 10 17 0 1544 18 00 0 0893 2 33 0 0587 10 33 0 1462 18 17 0 0856 2 50 0.0607 10 50 0.1478 18 33 0 0827 2 67 0 0627 10 67 0 1403 18 50 0 0832 2 83 0 0643 10 83 0 1349 18 67 0 0831 3 00 0 0658 11 00 0 1360 18 83 0 0832 3.17 0 0670 11 17 0 1322 19 00 0 0832 3 33 0 0681 11 33 0.1296 19 17 0 0794 3 50 0 0691 11 50 0 1302 19 33 0 0765 3 67 0 0724 11 67 0 1265 19 50 0 0770 3 83 0 0754 11 83 0 1239 19 67 0 0768 4 00 0.0759 12 00 0 1245 19 83 0 0769 4 17 0 0817 12 17 0 1208 20 00 0 0769 4 33 0 0868 12 33 0 1180 20 17 0 0770 4 50 0 0870 12 50 0 1186 20 33 0 0770 4 67 0 0929 12 67 0 1149 20 50 0 0770 4 83 0 0983 12 83 0 1121 20 67 0 0771 5 00 0 0992 13 00 0 1127 20 83 0 0771 5 17 0 1060 13 17 0 1126 21 00 0 0771 5 33 0 1119 13 33 0 1128 21 17 0 0771 5 50 0 1127 13 50 0 1129 21 33 0 0772 5 67 0 1198 13 67 0 1093 21 50 0 0772 5 83 0 1258 13 83 0 1064 21 67 0.0772 6 00 0 1265 14 00 0 1070 21 83 0 0773 6 17 0 1397 14 17 0 1069 22 00 0 0773 6 33 0 1509 14 33 0 1071 22 17 0 0735 6 50 0 1511 14 50 0 1071 22 33 0 0705 6 67 0 1711 14 67 0 1035 22 50 0 0711 6 83 0 1878 14 83 0.1006 22 67 0 0709 7 00 0 1876 15 00 0 1012 22 83 0 0710 7 17 0 2119 15 17 0 1011 23 00 0.0710 7 33 0 2319 15 33 0 1012 23 17 0 0710 7 50 0 2315 15 50 0 1012 23 33 0 0710 7 67 0 4731 15 67 0 0976 23 50 0 0710 7 83 0 6766 15 83 0 0947 23 67 0 0711 8 00 0 6603 16 00 0 0952 23 83 0.0711 8 17 0 4714 16 17 0 0951 24 00 0 0711 8 33 0 3056 16 33 0 0952 24 17 0 0287 8 50 0 3343 16 50 0 0953 24 33 0 0005 Hydrograph ID: BASIN E Area. 0.8483 ac Hyd Int: 10 00 min Base Flow• Peak Flow. 0.6766 cfs Peak Time: 7.83 hrs Hyd Vol: 0.2312 acft MOVEHYD [BASIN E] TO [BASIN E - 6 mo] AS [6 mo] Peak Flow. 0 1690 cfs Peak Time. 7 83 hrs Hyd Vol 2530.78 cf - 0 0581 acft MOVEHYD [BASIN E] TO [BASIN E - 100 yr] AS [100 yr] Peak Flow 0.6766 cfs Peak Time 7.83 hrs Hyd Vol 10071 01 cf - 0 2312 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 329 0000 ft 335 3000 ft 0 10 Infd• 10.00 in/hr Multiplier 1.00 Reach ID: BASIN E BIOSWALE Section Properties: Shape: Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 70 0000 ft 0 10 Routing Method• Travel Time Translation Hyd params By 0 0250 Mannings Formula Width Bank Hgt ss1 ss2 16.0000 ft 3.0000 ft 3 OOh 1 v 3 OOh 1 v Up Node Dn Node Up Invert Dn Invert DUMMY E 0.0000 ft 0.0000 ft Conduit Constraints: Mln Vel Max Vel Mln Cov Min Slope Max Slope Mln drop 0.5000 ft 1.0000 ft 3.0000 ft 0 5000 ft 2 0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 0000 ac 0 0000 cf 0 0000 cf 0.0000 ft/s 0.0000 ft Ent Loss Exit Loss Fnct Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0 0000 ft ROUTEHYD [BASIN E - 6 MO] THRU [BASIN E BIOSWALE] USING THUR100Y AND [6 MO ] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0 1690 ---- 1 00 0 1324 Ditch 0 4732 ----- BASIN F ROUTEHYD [BASIN E - 100 YR] THRU [BASIN E BIOSWALE] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0.6766 ---- 1 00 0 2850 Ditch 0 7627 ----- BASIN E Node ID: INFILTRATION E Desc: Manhole structure Start EI: 335 3000 ft Max EI: 336.3000 ft Contrib Basin• Contrib Hyd: Length Width Void Ratio 70 0000 ft 16.0000 ft 39.00 Node ID: BASIN E RPL Desc. Manhole structure Start EI. 335.3000 ft Max EI 336 3000 ft Contrib Basin: Contrib Hyd• Storage Id: INFILTRATION E Discharge Id INFILTRATION RLPCOMPUTE [BASIN E RPL] SUMMARY 100 YR MatchQ=PeakQ= 0 6766 cfs Peak Out Q' 0.2232 cfs -Peak Stg: 336 55 ft - Active Vol 1087.95 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -E Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin E Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 DEVELOPED LAND USE Basin Basin E Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale E Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, .~, o„ ~ , ,.., uepth: aft. Bottom Length: 70ft. Bottom Width 16ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.014 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.8 0.026 0.000 0.000 0.000 334.9 0.027 0.002 0.000 0.259 335.0 0.027 0.004 0.000 0.259 335.0 0.028 0.006 0.000 0.259 335.1 0.029 0.009 0.000 0.259 ~_ J ~" :> > J 9, -.,;~ sy~g6PH D,~Y~j~ r' ' Op WAS/ ~~''`~ "~~~ A ? (~ ~s~ ~ b I ~ClSI ~µ~0 ,~~ ' ~.~.~~ 09-22-OS IXPtRFS: 1 t •22- 33.2 0.030 0.011 0.000 0.259 335.3 0.031 0.013 0.000 0.259 335.3 0.032 0.016 0.411 0.259 335.4 0.033 0.018 1.873 0.259 335.5 0.033 0.021 3.920 0.259 335.6 0.034 0.023 6.416 0.259 335.7 0.035 0.026 9.292 0.259 335.7 0.036 0.029 12.50 0.259 335.8 0.037 0.032 16.01 0.259 335.9 0.038 0.035 19.81 0.259 336.0 0.039 0.038 23.86 0.259 336.0 0.040 0.041 28.15 0.259 336.1 0.091 0.099 32.67 0.2.59 336.2 0.042 0.097 37.92 0.259 336.3 0.043 0.050 42.37 0.259 336.4 0.044 0.054 47.53 0.259 336.9 0.095 0.057 52.88 0.259 336.5 0.046 0.061 58.41 0.259 336.6 0.046 0.064 69.13 0.259 336.7 0.047 0.068 70.02 0.259 336.7 0.048 0.072 76.08 0.259 336.8 0.049 0.075 82.31 0.259 336.9 0.050 0.079 88.70 0.259 337.0 0.051 0.083 95.24 0.259 337.1 0.052 0.087 101.9 0.259 337.1 0.053 0.091 108.8 0.259 337.2 0.054 0.095 115.8 0.259 337.3 0.055 0.100 122.9 0.259 337.9 0.056 0.104 130.2 0.259 337.4 0.057 0.109 137.6 0.259 337.5 0.058 0.113 145.2 0.259 337.6 0.059 0.118 152.9 0.259 337.7 0.060 0.122 160.7 0.259 337.8 0.062 0.127 168.6 0.259 337.8 0.063 0.132 176.7 0.259 ANALYSIS RESULTS Flow Frequency Return Pera.ods for Predeveloped Return Period Flow(cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389968 50 year 0.420113 100 year 0.450018 Flow Frequency Return Periods for Developed Unmitigated Return Pera.od Flow(cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389468 50 year 0.420113 100 year 0.450018 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed M~.tigated Flow(cfs) 0.54587 1.518176 2.680528 5.044867 7.701283 11.37838 Yearly Peaks for Predeveloped and Developed-M~.tigated Year Predeveloped Developed 1956 0.245 0.000 1957 0.389 0.127 1958 0.223 0.000 1959 0.259 0.000 1960 0.286 0.000 1961 0.193 0.000 1962 0.205 0.000 1963 0.922 0.077 1964 0.299 0.000 1965 0.283 0.000 1966 0.197 0.000 1967 0.247 0.000 1968 0.190 0.000 1969 0.187 0.000 1970 0.187 0.000 1971 0.232 0.000 1972 0.290 0.000 1973 0.219 0.000 1974 0.256 0.000 1975 0.221 0.000 1976 0.256 0.000 1977 0.323 0.009 1978 0.274 0.000 1979 0.326 0.000 1980 0.245 0.000 1981 0.281 0.000 1982 0.323 0.000 1983 0.346 0.051 1984 0.212 0.000 1985 0.244 0.000 1986 0.275 0.000 1987 0.302 0.000 1988 0.162 0.000 1989 0.194 0.000 1990 0.383 0.092 1991 0.405 0.106 1992 0.238 0.000 1993 0.174 0.000 1994 0.194 0.000 1995 0.281 0.000 1996 0.285 0.000 1997 0.229 0.000 1998 0.321 0.000 1999 0.276 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4096 0.1063 2 0.3891 0.0923 3 0.3833 0.0766 4 0.3463 0.0508 5 0.3262 0.0085 6 0.3235 0.0000 7 0.3226 0.0000 8 0.3215 0.0000 9 0.3017 0.0000 10 0.2987 0.0000 11 0.2896 0.0000 12 0.2856 0.0000 13 0.2848 0.0000 14 0.2833 0.0000 15 0.2811 0.0000 16 0.2806 0.0000 17 0.2761 0.0000 18 0.2796 0.0000 19 0.2791 0.0000 20 0.2594 0.0000 21 0.2562 0.0000 22~ 0.2555 0.0000 23 0.2467 0.0000 24 0.2451 0.0000 25 0.2497 0.0000 26 0.2493 0.0000 27 0.2380 0.0000 28 0.2324 0.0000 29 0.2295 0.0000 30 0.2230 0.0000 31 0.2214 0.0000 32 0.2194 0.0000 33 0.2119 0.0000 34 0.2049 0.0000 35 0.1973 0.0000 36 0.1938 0.0000 37 0.1937 0.0000 38 0.1925 0.0000 39 0.1897 0.0000 40 0.1869 0.0000 41 0.1866 0.0000 92 0.1744 0.0000 43 0.1619 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1275 1044 0 .0 Pass 0.1305 972 0 .0 Pass 0.1334 898 0 .0 Pass 0.1364 829 0 .0 Pass 0.1394 774 0 .0 Pass 0.1423 716 0 .0 Pass 0.1453 660 0 .0 Pass 0.1482 613 0 .0 Pass 0.1512 563 0 .0 Pass 0.1591 523 0 .0 Pass 0.1571 487 0 .0 Pass 0.1600 451 0 .0 Pass 0.1630 427 0 .0 Pass 0.1660 392 0 .0 Pass 0.1689 356 0 .0 Pass 0.1719 339 0 .0 Pass 0.1748 314 0 .0 Pass 0.1778 296 0 .0 Pass 0.1807 271 0 .0 Pass 0.1837 252 0 .0 Pass 0.1866 237 0 .0 Pass 0.1896 215 0 .0 Pass 0.1926 197 0 .0 Pass 0.1955 182 0 .0 Pass 0.1985 170 0 .0 Pass 0.2014 163 0 .0 Pass 0.2044 158 0 .0 Pass 0.2073 151 0 .0 Pass 0.2103 145 0 .0 Pass 0.2132 141 0 .0 Pass 0.2162 137 0 .0 Pass 0.2191 130 0 .0 Pass 0.2221 119 0 .0 Pass 0.2251 112 0 .0 Pass 0.2280 107 0 .0 Pass 0.2310 101 0 .0 Pass 0.2339 99 0 .0 Pass 0.2369 89 0 .0 Pass 0.2398 86 0 .0 Pass 0.2928 78 0 .0 Pass 0.2457 73 0 .0 Pass 0.2487 70 0 .0 Pass 0.2517 65 0 .0 Pass 0.2546 61 0 .0 Pass 0.2576 57 0 .0 Pass 0.2605 52 0 .0 Pass 0.2635 47 0 .0 Pass 0.2664 47 0 .0 Pass 0.2699 43 0 .0 Pass 0.2723 40 0 .0 Pass 0.2753 37 0 .0 Pass 0.2783 34 0 .0 Pass 0.2812 29 0 .0 Pass 0.2842 27 0 .0 Pass 0.2871 25 0 .0 Fass 0.2901 29 0 .0 Pass 0.2930 21 0 .0 Pass 0.2960 20 0 .0 Pass 0.2989 19 0 .0 Pass 0.3019 17 0 .0 Pass 0.3049 16 0 .0 Pass 0.3078 16 0 .0 Pass 0.3108 16 0 .0 Pass 0.3137 14 0 .0 Pass 0.3167 12 0 .0 Pass 0.3196 12 0 .0 Pass 0.3226 11 0 .0 Pass 0.3255 9 0 .0 Pass 0.3285 8 0 .0 Pass 0.3315 8 0 .0 Pass 0.3399 8 0 .0 Pass 0.3374 8 0 .0 Pass 0.3403 8 0 .0 Pass 0.3433 7 0 .0 Pass 0.3462 7 0 .0 Pass 0.3992 5 0 .0 Pass 0.3521 5 0 .0 Pass 0.3551 5 0 .0 Pass 0.3581 5 0 .0 Pass 0.3610 5 0 .0 Pass 0.3690 5 0 .0 Pass 0.3669 5 0 .0 Pass 0.3699 5 0 .0 Pass 0.3728 5 0 .0 Pass 0.3758 5 0 .0 Pass 0.3787 5 0 .0 Pass 0.3817 5 0 .0 Pass 0.3846 4 0 .0 Pass 0.3876 4 0 .0 Pass 0.3906 2 0 .0 Pass 0.3935 2 0 .0 Pass 0.3965 2 0 .0 Pass 0.3994 2 0 .0 Pass 0.4024 2 0 .0 Pass 0.9053 1 0 .0 Pass 0.4083 1 0 .0 Pass 0.9112 1 0 .0 Pass 0.4142 1 0 .0 Pass 0.4172 1 0 .0 Pass 0.9201 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.024 acre-feet On-line facility target flow: 0.12 cfs. Adjusted for 15 min: 0.19 cfs. Off-line facility target flow: 0.08 cfs. Adjusted for 15 m1n: 0.09 cfs program and accompanyinq documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or Implied, including but not limited to impl~_ed warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1QU kk7kkkkkkkY4+rd+~P~OM+C)a?ckkkk?ck .~.. ~+~- 1.0 .... tl~ ~ yryc'K~C+3C~q~404o O o4 ~ ~ ~,oo~~o.ya o Predeveloped u 10E-1 x Developec~taitigated _H x 10E2 1 10 20 30 d0 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart M o Predevelo~d 1 t~ x Developed wdh faciirtq 0 35 0 ~ ~ - 0 27 -- ~~ ~~ ~ __ ~ ~ _ w U to ~ 013 -- -_ ___ _ _ _~ L U _H O 10E5 ~ 1064 10E•3 10E-2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph PEAR ;FLOW {cfsj 100`1138 '. [ .~~ ;~ ~ ~ ~`; ~ 3i i 't 50 ~ 7 701 ~ ~ ~ ' 3 ~ ~~ ~j `; 3; I ~ , Syr 25 5 X45 . ~ ~ ' 4 ~ 3 3 ~ l~ ~ ~~(z ='' ~ 1 D , 2 881 ~ =~---,~-- , I ~ ~ ; ~ ° ~ ~~ , 5 ' 151$ - -~ 2 5459 A .~ - _ ' , 0 early Neaks for Developed WlPond CLEARHIS BSN E1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN E1 0 08 8 00 0 0273 0 42 SBUH/SCS TYPEIA 6 mo BSN E1 0 14 8 00 0 0480 0 42 SBUH/SCS TYPE1A 2 yr BSN E1 0 23 8 00 0 0788 0 42 SBUH/SCS TYPEIA 10 yr BSN E1 0 27 8 00 0 0947 0 42 SBUH/SCS TYPEIA 25 yr BSN E1 0 29 8 00 0 1027 0 42 SBUH/SCS TYPEIA 50 yr BSN E1 0 32 8 00 0 1108 0 42 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN E1 Hyd Method: SBUH Hyd Loss Metho d. SCS CN Numb er Peak Factor: 484.00 SCS Abs: 0 20 Storm Dur: 24 00 hrs Inty: 10 00 min Area CN TC Pervious 0.1250 ac 78.00 0 03 hrs Impervious 0 2906 ac 98.00 0 09 hrs Total 0.4156 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78 00 0 1250 ac Impervious CN Data: ROADWAY 98.00 0 2131 ac SIDWALK 98 00 0.0316 ac DRIVEWAY 98 00 0.0459 ac Pervious TC Data: Flow type: Description: Length. Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1.90 min Impervious TC Data: Flow type: Description Length Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 237 00 ft 0.50% 27.0000 2.75 min Sheet Across Roadway 18.50 ft 2 00% 0.0110 0.40 min Channel Through Strom Wat er Pipe 150.00 ft 0 50% 21.0000 1 68 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20 00 ft 2.00% 0.0110 0.42 min BSN E2 Event Summary: BasinlD Peak O Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN E2 0 09 7 83 0 0308 0 43 SBUH/SCS TYPEIA 6 mo BSN E2 0 16 7 83 0 0534 0 43 SBUH/SCS TYPEIA 2 yr BSN E2 0.26 7 83 0 0864 0 43 SBUH/SCS TYPEIA 10 yr BSN E2 0 31 7 83 0 1033 0 43 SBUH/SCS TYPEIA 25 yr BSN E2 0 34 7 83 0 1118 0 43 SBUH/SCS TYPEIA 50 yr BSN E2 0 36 7 83 0 1204 0 43 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN E2 Hyd Method. SBUH Hyd Loss Method• SCS CN Number Peak Factor: 484.00 SCS Abs: 0 20 Storm Dur• 24.00 hrs Intv: 10.00 min Area CN TC Pervious 0.0986 ac 78 00 0.03 hrs Impervious 0.3341 ac 98.00 Total 0.4327 ac Supporting Data: Pervious CN Data: Type B Soils Hydraulic Group 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Stnp Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway 0 05 hrs 0.0986 ac 0.2251 ac 0.0287 ac 0.0803 ac Length Slope. Coeff: Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length: Slope. Coeff: Travel Time 263 00 ft 3 28% 27 0000 0.90 min 18.50 ft 2.00% 0 0110 0.40 min 100 00 ft 0 50% 21.0000 1 12 min 5 00 ft 2 00% 0.0110 0.14 min 20 00 ft 2 00% 0 0110 0.42 min ADDHYD [BSN E1] AS [6 mo] [BSN E2] AS [6 mo] TO [BSN E1 +BSN E2] Peak Flow 0.1690 cfs Peak Time. 7 83 hrs Hyd Vol• 2530 78 cf - 0.0581 acft ADDHYD [BSN E1] AS [2 yr] [BSN E2] AS [2 yr] TO [BSN E1 +BSN E2] Peak Flow: 0.2914 cfs Peak Time 7.83 hrs Hyd Vol• 4417 21 cf - 0 1014 acft ADDHYD [BSN E1] AS [10 yr] [BSN E2] AS [10 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.4802 cfs Peak Time• 7.83 hrs Hyd Vol. 7194.70 cf - 0 1652 acft ADDHYD [BSN E1] AS [25 yr] [BSN E2] AS [25 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.5777 cfs Peak Time. 7 83 hrs Hyd Vol: 8624.23 cf - 0 1980 acft ADDHYD [BSN E1] AS [50 yr] [BSN E2] AS [50 yr] TO [BSN E1 +BSN E2] Peak Flow: 0 6270 cfs Peak Time 7.83 hrs Hyd Vol: 9345 61 cf - 0.2145 acft ADDHYD [BSN E1] AS [100 yr] [BSN E2] AS [100 yr] TO [BSN E1 +BSN E2] Peak Flow: 0 6766 cfs Peak Time 7 83 hrs Hyd Vol: 10071 01 cf - 0.2312 acft Hydrograph ID: BASIN E Area• 0 8483 ac Hyd Int: 10.00 min Base Flow. Peak Flow. 0.6766 cfs Peak Time: 7 83 hrs Hyd Vol: 0.2312 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0022 8 67 0 2738 16 50 0 0953 0 83 0 0084 8 83 0 2360 16 67 0 0953 1 00 0 0154 9 00 0 2424 16 83 0.0954 1 17 0 0233 9 17 0 2057 17 00 0 0954 1 33 0 0307 9 33 0 1785 17 17 0 0917 1.50 0 0355 9 50 0 1833 17 33 0 0888 1 67 0 0414 9 67 0 1714 17 50 0.0893 1 83 0 0465 9 83 0 1638 17.67 0 0892 2 00 0 0496 10 00 0 1653 17 83 0 0893 2 17 0 0545 10 17 0 1544 18 00 0 0893 2 33 0 0587 10 33 0 1462 18 17 0 0856 2 50 0 0607 10 50 0 1478 18 33 0 0827 2 67 0 0627 10 67 0 1403 18 50 0 0832 2 83 0 0643 10 83 0 1349 18 67 0 0831 3 00 0 0658 11 00 0 1360 18 83 0 0832 3.17 0 0670 11 17 0 1322 19 00 0 0832 3 33 0 0681 11 33 0 1296 19 17 0 0794 3 50 0 0691 11 50 0 1302 19 33 0 0765 3 67 0 0724 11 67 0 1265 19 50 0 0770 3 83 0 0754 11 83 0 1239 19 67 0 0768 4 00 0 0759 12 00 0 1245 19 83 0 0769 4 17 0 0817 12 17 0 1208 20 00 0 0769 4 33 0 0868 12 33 0 1180 20 17 0 0770 4 50 0 0870 12 50 0 1186 20 33 0 0770 4 67 0 0929 12 67 0 1149 20 50 0 0770 4 83 0 0983 12 83 0 1121 20 67 0 0771 5 00 0 0992 13 00 0 1127 20 83 0 0771 5 17 0 1060 13 17 0 1126 21 00 0 0771 5 33 0 1119 13 33 0 1128 21 17 0 0771 5 50 0 1127 13 50 0 1129 21 33 0 0772 5 67 0 1198 13 67 0 1093 21 50 0 0772 5 83 0 1258 13 83 0 1064 21 67 0 0772 6 00 0 1265 14 00 0 1070 21 83 0 0773 6 17 0 1397 14 17 0 1069 22.00 0 0773 6 33 0 1509 14 33 0 1071 22 17 0 0735 6 50 0 1511 14 50 0 1071 22 33 0 0705 6 67 0 1711 14 67 0 1035 22 50 0 0711 6 83 0 1878 14 83 0 1006 22 67 0 0709 7 00 0 1876 15 00 0 1012 22 83 0.0710 7 17 0 2119 15 17 0 1011 23 00 0 0710 7 33 0 2319 15 33 0 1012 23 17 0 0710 7 50 0 2315 15 50 0 1012 23 33 0 0710 7 67 0.4731 15 67 0 0976 23 50 0 0710 7 83 0 6766 15 83 0 0947 23 67 0 0711 8 00 0 6603 16 00 0 0952 23 83 0 0711 8 17 0 4714 16 17 0 0951 24 00 0 0711 8 33 0 3056 16 33 0 0952 24 17 0 0287 8 50 0 3343 16 50 0 0953 24 33 0 0005 Hydrograph ID: BASIN E Area: 0.8483 ac Hyd Int: 10 00 min Base Flow: Peak Flow: 0 6766 cfs Peak Time• 7.83 hrs Hyd Vol: 0.2312 acft MOVEHYD [BASIN E] TO [BASIN E - 6 mo] AS [6 mo] Peak Flow. 0.1690 cfs Peak Time 7 83 hrs Hyd Vol 2530 78 cf - 0.0581 acft MOVEHYD (BASIN E] TO [BASIN E - 100 yr] AS [100 yr] Peak Flow: 0.6766 cfs Peak Time• 7.83 hrs Hyd Vol. 10071 01 cf - 0.2312 acft Control Structure ID: INFILTRATION -Infiltration control structure Descnp• Multiple Orifice Start EI Max EI Increment 329.0000 ft 335.3000 ft 0.10 Infil: 10.00 in/hr Multiplier 1.00 Reach ID: BASIN E BIOSWALE Section Properties: Shape• Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 70.0000 ft 0.10 Routing Method• Travel Time Translation Hyd params By 0 0250 Mannings Formula Width Bank Hgt 16 0000 ft 3 0000 ft Up Node Dn Node DUMMY E Conduit Cons traints: Min Vel Max Vel 0.5000 ft 1.0000 ft In/Exfil Hold Up 10 0000 in/hr NO Conduit Summary: Trib Area Flow 0 0000 ac 0.0000 cf Ent Loss Exit Loss 0.000000 ft 0.000000 ft ss1 ss2 3.OOh:1v 3.OOh 1v Up Invert Dn Invert 0.0000 ft 0 0000 ft Min Cov Min Slope Max Slope Min drop 3.0000 ft 0.5000 ft 2 0000 ft 0.0000 ft Hold Dn Match Inv Allow Smaller NO YES NO Capacity Velocity Normal Depth 0.0000 cf 0.0000 ft/s 0 0000 ft Frict Loss Start TW 0 000000 ft 0 0000 ft ROUTEHYD [BASIN E - 6 MO] THRU [BASIN E BIOSWALE] USING THUR100Y AND [6 MO ] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0 1690 ---- 1 00 0 1324 Ditch 0 4732 ----- BASIN E ROUTEHYD [BASIN E - 100 YR] THRU [BASIN E BIOSWALE] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWAI_E E 0 8483 0 6766 ---- 1 00 0 2850 Ditch 0 7627 ----- BASIN E Node ID: INFILTRATION E Desc: Manhole structure Start EI: 335.3000 ft Max EI. 336.3000 ft Contrib Basin Contrib Hyd• Length Width Void Ratio 70.0000 ft 16.0000 ft 39.00 Node ID: BASIN E RPL Desc: Manhole structure Start EI• 335.3000 ft Max EI: 336.3000 ft Contrib Basin: Contrib Hyd Storage Id. INFILTRATION E Discharge Id INFILTRATION RLPCOMPUTE [BASIN E RPL] SUMMARY 100 YR MatchO=PeakQ= 0.6766 cfs Peak Out Q' 0 2232 cfs -Peak Stg• 336 55 ft - Active Vol: 1087.95 cf ' WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -E Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin E Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 DEVELOPED LAND USE Basin Basin E Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale E Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Pimonc~~.~~ Depth: aft. Bottom Length: 70ft. Bottom Width 16ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.019 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 334.8 0.026 0.000 0.000 0.000 334.9 0.027 0.002 0.000 0.259 335.0 0.027 0.004 0.000 0.259 335.0 0.028 0.006 0.000 0.259 335.1 0.029 0.009 0.000 0.259 `y ~ ~ - F, ` . ~. ~ J~J ~~gEPH ~ op wA, g ~~~~ \' ~ 3Y_s~ ~~ ~C~Sl6K~O ~ °~`~~+~ 09-22~OS IXFIRFS: 11-22- 335.2 0.030 0.011 0.000 0.259 335.3 0.031 0.013 0.000 0.259 335.3 0.032 0.016 0.411 0.259 335.4 0.033 0.018 1.873 0.259 335.5 0.033 0.021 3.920 0.259 335.6 0.039 0.023 6.416 0.259 335.7 0.035 0.026 9.292 0.259 335.7 0.036 0.029 12.50 0.259 335.8 0.037 0.032 16.01 0.259 335.9 0.038 0.035 19.81 0.259 336.0 0.039 0.038 23.86 0.259 336.0 0.090 0.041 28.15 0.259 336.1 0.041 0.099 32.67 0.259 336.2 0.047_ 0.047 37.92 0.259 336.3 0.093 0.050 42.37 0.259 336.4 0.044 0.054 47.53 0.259 336.4 0.045 0.057 52.88 0.259 336.5 0.046 0.061 58.41 0.259 336.6 0.046 0.064 64.13 0.259 336.7 0.047 0.068 70.02 0.259 336.7 0.098 0.072 76.08 0.259 336.8 0.049 0.075 82.31 0.259 336.9 0.050 0.079 88.70 0.259 337.0 0.051 0.083 95.24 0.259 337.1 0.052 0.087 101.9 0.259 337.1 0.053 0.091 108.8 0.259 337.2 0.054 0.095 115.8 0.259 337.3 0.055 0.100 122.9 0.259 337.4 0.056 0.104 130.2 0.259 337.4 0.057 0.109 137.6 0.259 337.5 0.058 0.113 145.2 0.259 337.6 0.059 0.118 152.9 0.259 337.7 0.060 0.122 160.7 0.259 337.8 0.062 0.127 168.6 0.259 337.8 0.063 0.132 176.7 0.259 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389468 50 year 0.420113 100 year 0.450018 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(efs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389468 50 year 0.420113 100 year 0.450018 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.245 0.000 1957 0.389 0.127 1958 0.223 0.000 1959 0.259 0.000 1960 0.286 0.000 1961 0.193 0.000 1962 0.205 0.000 1963 0.422 0.077 1969 0.299 0.000 1965 0.283 0.000 1966 0.197 0.000 1967 0.297 0.000 1968 0.190 0.000 1969 0.187 0.000 1970 0.187 0.000 1971 0.232 0.000 1972 0.290 0.000 1973 0.219 0.000 1974 0.256 0.000 1975 0.221 0.000 1976 0.256 0.000 1977 0.323 0.009 1978 0.274 0.000 1979 0.326 0.000 1980 0.245 0.000 1981 0.281 0.000 1982 0.323 0.000 1983 0.346 0.051 1984 0.212 0.000 1985 0.249 0.000 1986 0.275 0.000 1987 0.302 0.000 1988 0.162 0.000 1989 0.194 0.000 1990 0.383 0.092 1991 0.405 0.106 1992 0.238 0.000 1993 0.174 0.000 1994 0.194 0.000 1995 0.281 0.000 1996 0.285 0.000 1997 0.229 0.000 1998 0.321 0.000 1999 0.276 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Ma.tigated Rank Predeveloped Developed 1 0.4046 0.1063 2 0.3891 0.0923 3 0.3833 0.0766 4 0.3463 0.0508 5 0.3262 0.0085 6 0.3235 0.0000 7 0.3226 0.0000 8 0.3215 0.0000 9 0.3017 0.0000 10 0.2987 0.0000 11 0.2896 0.0000 12 0.2856 0.0000 13 0.2848 0.0000 14 0.2833 0.0000 15 0.2811 0.0000 16 0.2806 0.0000 17 0.2761 0.0000 18 0.2796 0.0000 19 0.2741 0.0000 20 0.2594 0.0000 21' 0.2562 0.0000 22 0.2555 0.0000 23 0.2467 0.0000 24 0.2451 0.0000 25 0.2447 0.0000 26 0.2443 0.0000 27 0.2380 0.0000 28 0.2324 0.0000 29 0.2295 0.0000 30 0.2230 0.0000 31 0.2214 0.0000 32 0.2194 0.0000 33 0.2119 0.0000 39 0.2049 0.0000 35 0.1973 0.0000 36 0.1938 0.0000 37 0.1937 0.0000 38 0.1925 0.0000 39 0.1897 0.0000 90 0.1869 0.0000 41 0.1866 0.0000 42 0.1744 0.0000 43 0.1619 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1275 1099 0 .0 Pass 0.1305 972 0 .0 Pass 0.1334 898 0 .0 Pass 0.1364 829 0 .0 Pass 0.1394 774 0 .0 Pass 0.1423 716 0 .0 Pass 0.1453 660 0 .0 Pass 0.1482 613 0 .0 Pass 0.1512 563 0 .0 Pass 0.1541 523 0 .0 Pass 0.1571 487 0 .0 Pass 0.1600 451 0 .0 Pass 0.1630 427 0 .0 Pass 0.1660 392 0 .0 Pass 0.1689 356 0 .0 Pass 0.1719 334 0 .0 Pass 0.1748 314 0 .0 Pass 0.1778 296 0 .0 Pass 0.1807 271 0 .0 Pass 0.1837 252 0 .0 Pass 0.1866 237 0 .0 Pass 0.1896 215 0 .0 Pass 0.1926 197 0 .0 Pass 0.1955 182 0 .0 Pass 0.1985 170 0 .0 Pass 0.2014 163 0 .0 Pass 0.2044 158 0 .0 Pass 0.2073 151 0 .0 Pass 0.2103 145 0 .0 Pass 0.2132 141 0 .0 Pass 0.2162 137 0 .0 Pass 0.2191 130 0 .0 Pass 0.2221 119 0 .0 Pass 0.2251 112 0 .0 Pass 0.2280 107 0 .0 Pass 0.2310 101 0 .0 Pass 0.2339 94 0 .0 Pass 0.2369 89 0 .0 Pass 0.2398 86 0 .0 Pass 0.2428 78 0 .0 Pass 0.2457 73 0 .0 Pass 0.2487 70 0 .0 Pass 0.2517 65 0 .0 Pass 0.'2546 61 0 .0 Pass 0.2576 57 0 .0 Pass 0.2605 52 0 .0 Pass 0.2635 47 0 .0 Pass 0.2664 47 0 .0 Pass 0.2694 43 0 .0 Pass 0.2723 40 0 .0 Pass 0.2753 37 0 .0 Pass 0.2783 39 0 .0 Pass 0.2812 29 0 .0 Pass 0.2842 27 0 .0 Pass 0.2871 25 0 .0 Pass 0.2901 24 0 .0 Pass 0.2930 21 0 .0 Pass 0.2960 20 0 .0 Pass 0.2989 19 0 .0 Pass 0.3019 17 0 .0 Pass 0.3049 16 0 .0 Pass 0.3078 16 0 .0 Pass 0.3108 16 0 .0 Pass 0.3137 19 0 .0 Pass 0.3167 12 0 .0 Pass 0.3196 12 0 .0 Pass 0.3226 11 0 .0 Pass 0.3255 9 0 .0 Pass 0.3285 8 0 .0 Pass 0.3315 8 0 .0 Pass 0.3399 8 0 .0 Pass 0.3374 8 0 .0 Pass 0.3403 8 0 .0 Pass 0.3433 7 0 .0 Pass 0.3462 7 0 .0 Pass 0.3992 5 0 .0 Pass 0.3521 5 0 .0 Pass 0.3551 5 0 .0 Pass 0.3581 5 0 .0 Pass 0.3610 5 0 .0 Pass 0.3690 5 0 .0 Pass 0.3669 5 0 .0 Pass 0.3699 5 0 .0 Pass 0.3728 5 0 .0 Pass 0.3758 5 0 .0 Pass 0.3787 5 0 .0 Pass 0.3817 5 0 .0 Pass 0.3846 9 0 .0 Pass 0.3876 4 0 .0 Pass 0.3906 2 0 .0 Pass 0.3935 2 0 .0 Pass 0.3965 2 0 .0 Pass 0.3994 2 0 .0 Pass 0.4024 2 0 .0 Pass 0.4053 1 0 .0 Pass 0.4083 1 0 .0 Pass 0.9112 1 0 .0 Pass 0.4142 1 0 .0 Pass 0.4172 1 0 .0 Pass 0.4201 1 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.12 cfs. Adjusted for 15 min: 0.19 cfs. Off-line facility target flow: 0.08 cfs. Adjusted for 15 ma.n: 0.09 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages YEAR FLOW (cts) 100: 4500 ._.....~,~,. 50 ~ 4209 ~ ~ `~, , 25 ~ .3895 , 1 j ~ 10 .34G9 ~- . _ 5 ~ 3111 ;`~l 1~~) 1 i n I~ z 2551 r ~'' ~~ ~ ~ '~ my reaKS for developed W/O Pond YEAR FLOW (cfs) 100 11 38 ' i v i~ i i~ ; y~ i E ~ 50 ~ 701 i3 ~ [ ; 7 i 3 ~ i ~ ~ i ~ ;~ 25 5 045 - ' ' ' ' {{ } i , 5 1x18 ~, ~~ ', 2 5459 ° ~ ' , ` ~--~ early Peaks for Developed W/Pond ~Q~ k?~?~Yxkitk7tkk`r10~Xb{+.'~Nx`+}DhGppckkhhhk% w IO ~? ~...~ i ~ tt1 y„~OhOb00 ~ ~~ ~ ~ oc,oooaooao~" o Predeveloped ~ 10E4 x Developec~pitigated ~ ~ Ca 10E-2 1 10 20 30 40 50 60 70 80 90 99 Cumulative Probabili Flow Frequency Chart ~ o Predeveloped 0 ~ x Developed wit Facility 035 ~ s~ ""' 020 __ __ m _ _ Q> 013 _ _ ~ _ ~ _ ~ _ ~ _, _ r U ~_ 10E•5 ~ 10E•d 10E•3 10E•2 10E•1 1 10 Percent Exceeding Duration Granh Yearly Peaks for Predeveloped CLEARHIS BSN E1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN E1 0 08 8 00 BSN E1 0 14 8 00 BSN E1 0 23 8.00 BSN E1 0 27 8 00 BSN E1 0 29 8 00 BSN E1 0 32 8 00 yr Drainage Area: BSN E1 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur 24 00 hrs Area CN Pervious 0.1250 ac 78.00 Impervious 0.2906 ac 98 00 Total 0.4156 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78.00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description. Sheet Across Planter Stnp Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN E2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN E2 0 09 7 83 BSN E2 0 16 7 83 BSN E2 0 26 7 83 BSN E2 0 31 7 83 BSN E2 0.34 7 83 BSN E2 0 36 7 83 yr Drainage Area: BSN E2 Hyd Method• SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.0986 ac 78.00 Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0273 0 42 SBUH/SCS TYPEIA 6 mo 0 0480 0 42 SBUH/SCS TYPEIA 2 yr 0 0788 0 42 SBUH/SCS TYPEIA 10 yr 0 0947 0 42 SBUH/SCS TYPEIA 25 yr 0 1027 0 42 SBUH/SCS TYPE1A 50 yr 0 1108 0 42 SBUH/SCS TYPEIA 100 Loss Method SCS Abs. Intv: TC 0 03 hrs 0 09 hrs SCS CN Number 0 20 10 00 min 0.1250 ac 0 2131 ac 0.0316 ac 0.0459 ac Length Slope: Coeff. Travel Time 6.00 ft 2 00% 0.2400 1.90 min Length Slope: Coeff: Travel Time 237.00 ft 0.50% 27 0000 2.75 min 18 50 ft 2.00% 0 0110 0.40 min 150 00 ft 0 50% 21 0000 1.68 min 5 00 ft 2.00% 0 0110 0 14 mm 20 00 ft 2 00% 0 0110 0.42 min Peak Vol Area (ac-ft) ac 0 0308 0 43 0 0534 0 43 0 0864 0 43 0 1033 0 43 0 1118 0 43 0 1204 0 43 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUH/SCS TYPE1A 2 yr SBUHlSCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPEIA 100 Loss Method SCS CN Number SCS Abs 0.20 Intv: 10.00 mm TC 0 03 hrs Impervious 0 3341 ac 98 00 Total 0.4327 ac Supporting Data: Pervious CN Data: Type B Soils Hydraulic Group 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98.00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description. Sheet Across Planter Strip Impervious TC Data: Flow type: Description Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway 0.05 hrs 0.0986 ac 0 2251 ac 0.0287 ac 0 0803 ac Length Slope: Coeff Travel Time 6.00 ft 2 00% 0.2400 1.90 min Length: Slope: Coeff: Travel Time 263.00 ft 3.28% 27.0000 0.90 min 18.50 ft 2 00% 0.0110 0.40 min 100.00 ft 0 50% 21 0000 1.12 min 5 00 ft 2 00% 0.0110 0.14 mtn 20.00 ft 2.00% 0.0110 0 42 min ADDHYD [BSN E1] AS [6 mo] [BSN E2] AS [6 mo] TO [BSN E1 +BSN E2] Peak Flow: 0 1690 cfs Peak Time. 7 83 hrs Hyd Vol: 2530.78 cf - 0.0581 acft ADDHYD [BSN E1] AS [2 yr] [BSN E2] AS [2 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.2914 cfs Peak Time: 7 83 hrs Hyd Vol: 4417 21 cf - 0.1014 acft ADDHYD [BSN E1] AS [10 yr] [BSN E2] AS [10 yr] TO [BSN E1 +BSN E2] Peak Flow 0 4802 cfs Peak Time. 7 83 hrs Hyd Vol. 7194 70 cf - 0.1652 acft ADDHYD [BSN E1] AS [25 yr] [BSN E2] AS [25 yr] TO [BSN E1 +BSN E2] Peak Flow. 0 5777 cfs Peak Time: 7.83 hrs Hyd Vol: 8624.23 cf - 0.1980 acft ADDHYD [BSN E1] AS [50 yr] [BSN E2] AS [50 yr] TO [BSN E1 +BSN E2] Peak Flow 0.6270 cfs Peak Time. 7 83 hrs Hyd Vol. 9345 61 cf - 0.2145 acft ADDHYD [BSN E1] AS (100 yr] [BSN E2] AS [100 yr] TO (BSN E1 +BSN E2] Peak Flow 0.6766 cfs Peak Time: 7 83 hrs Hyd Vol 10071.01 cf - 0 2312 acft Hydrograph ID: BASIN E Area: 0.8483 ac Hyd Int 10 00 min Base Flow. Peak Flow: 0.6766 cfs Peak Time 7 83 hrs Hyd Vol 0.2312 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0022 8 67 0 2738 16 50 0 0953 0 83 0 0084 8 83 0 2360 16 67 0 0953 1 00 0 0154 9 00 0 2424 16 83 0 0954 1 17 0 0233 9 17 0 2057 17 00 0 0954 1 33 0 0307 9 33 0 1785 17 17 0 0917 1 50 0 0355 9 50 0 1833 17 33 0 0888 1 67 0.0414 9 67 0 1714 17 50 0.0893 1 83 0 0465 9 83 0 1638 17 67 0.0892 2 00 0 0496 10 00 0 1653 17 83 0 0893 2 17 0 0545 10 17 0 1544 18 00 0 0893 2 33 0 0587 10 33 0 1462 18 17 0 0856 2 50 0 0607 10 50 0 1478 18 33 0 0827 2 67 0 0627 10 67 0 1403 18 50 0 0832 2 83 0 0643 10 83 0 1349 18 67 0 0831 3 00 0 0658 11 00 0 1360 18 83 0 0832 3 17 0 0670 11 17 0 1322 19 00 0 0832 3 33 0 0681 11 33 0 1296 19 17 0 0794 3 50 0 0691 11 50 0 1302 19 33 0 0765 3 67 0 0724 11.67 0 1265 19 50 0 0770 3 83 0 0754 11 83 0 1239 19 67 0 0768 4 00 0 0759 12 00 0 1245 19 83 0 0769 4 17 0 0817 12 17 0 1208 20 00 0 0769 4 33 0 0868 12 33 0 1180 20 17 0 0770 4 50 0 0870 12 50 0 1186 20 33 0 0770 4 67 0.0929 12 67 0 1149 20 50 0 0770 4 83 0 0983 12 83 0 1121 20 67 0 0771 5 00 0 0992 13 00 0 1127 20 83 0 0771 5.17 0 1060 13 17 0 1126 21 00 0 0771 5 33 0 1119 13 33 0 1128 21 17 0 0771 5 50 0 1127 13 50 0 1129 21 33 0 0772 5 67 0 1198 13 67 0 1093 21 50 0 0772 5 83 0 1258 13 83 0 1064 21 67 0 0772 6 00 0 1265 14 00 0 1070 21 83 0 0773 6 17 0 1397 14 17 0 1069 22 00 0 0773 6 33 0 1509 14 33 0 1071 22 17 0 0735 6 50 0 1511 14 50 0 1071 22 33 0 0705 6 67 0 1711 14 67 0 1035 22 50 0 0711 6 83 0 1878 14 83 0 1006 22 67 0 0709 7 00 0 1876 15 00 0 1012 22 83 0 0710 7 17 0 2119 15 17 0 1011 23 00 0 0710 7 33 0 2319 15 33 0 1012 23 17 0 0710 7 50 0 2315 15 50 0 1012 23 33 0 0710 7 67 0 4731 15 67 0 0976 23 50 0 0710 7 83 0 6766 15 83 0 0947 23 67 0 0711 8 00 0 6603 16 00 0 0952 23 83 0 0711 8 17 0 4714 16 17 0 0951 24 00 0 0711 8 33 0 3056 16 33 0 0952 24 17 0 0287 8 50 0 3343 16 50 0 0953 24 33 0 0005 Hydrograph ID: BASIN E Area: 0.8483 ac Hyd Int: 10.00 min Base Flow. Peak Flow: 0 6766 cfs Peak Time• 7 83 hrs Hyd Vol• 0.2312 acft MOVEHYD [BASIN E] TO [BASIN E - 6 mo] AS [6 mo] Peak Flow: 0.1690 cfs Peak Time 7 83 hrs Hyd Vol• 2530 78 cf - 0 0581 acft MOVEHYD [BASIN E] TO [BASIN E - 100 yr] AS [100 yr] Peak Flow 0.6766 cfs Peak Time 7 83 hrs Hyd Vol 10071.01 cf - 0.2312 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip• Multiple Orifice Start EI Max EI Increment 329.0000 ft 335.3000 ft 0.10 Infil: 10.00 in/hr Multiplier: 1 00 Reach ID: BASIN E BIOSWALE Section Properties: Shape Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 70.0000 ft 0 10 Routing Method: Travel Time Translation Hyd params By 0 0250 Mannings Formula Width Bank Hgt 16.0000 ft 3 0000 ft Up Node Dn Node DUMMY E Conduit Constraints: Min Vel Max Vel 0 5000 ft 1 0000 ft In/Exfll Hold Up 10 0000 in/hr NO Conduit Summary: Trib Area Flow 0 0000 ac 0 0000 cf Ent Loss Exit Loss 0 000000 ft 0.000000 ft ss1 ss2 3 OOh.1v 3.OOh•1v Up Invert Dn Invert 0.0000 ft 0.0000 ft Min Cov Mln Slope Max Slope Min drop 3 0000 ft 0.5000 ft 2 0000 ft 0.0000 ft Hofd Dn Match Inv Allow Smaller NO YES NO Capacity Velocity Normal Depth 0 0000 cf 0 0000 ft/s 0 0000 ft Frict Loss Start TW 0.000000 ft 0.0000 ft ROUTEHYD [BASIN E - 6 MO] THRU [BASIN E BIOSWALE] USING THUR100Y AND [6 MO ] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0 1690 ---- 1 00 0 1324 Ditch 0 4732 ----- BASIN E ROUTEHYD [BASIN E - 100 YR) THRU [BASIN E BIOSWALE) USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0 6766 ---- 1 00 0 2850 Ditch 0 7627 ----- BASIN E Node ID: INFILTRATION E Desc: Manhole structure Start EI• 335.3000 ft Max EI• 336 3000 ft Contrib Basin. Contrib Hyd. Length Width Void Ratio 70.0000 ft 16.0000 ft 39.00 Node ID: BASIN E RPL Desc: Manhole structure Start EI. 335 3000 ft Max EI 336.3000 ft Contrib Basin. Contrib Hyd Storage Id INFILTRATION E Discharge Id INFILTRATION RLPCOMPUTE [BASIN E RPL] SUMMARY 100 YR MatchQ=PeakQ= 0.6766 cfs Peak Out Q. 0.2232 cfs -Peak Stg• 336.55 ft - Active Vol• 1087.95 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -E Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/21/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin E Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 DEVELOPED LAND USE Basin Basin E Flows To Bio-Infiltration Swale E Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.16 IMPERVIOUS: 1.01 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale E Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, r,e., ~ , ,,.. Depth: aft. Bottom Length: 70ft. Bottom Width 16ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 0.2 To 1 Volume at Riser Head: 0.014 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 59 in. Pond Hydraulic Table Stage(ft) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 339.8 0.026 0.000 0.000 0.000 334.9 0.027 0.002 0.000 0.259 335.0 0.027 0.004 0.000 0.259 335.0 0.028 0.006 0.000 0.259 335.1 0.029 0.009 0.000 0.259 C' , ~~ - J ` ~,J ~~gEPH of WA. q ~~~~ !? F~ts~ et~~ c.~:~'° 't ION~.~.~ 09-22-oS IXPIRES: it-22- 33.2 0.030 0.011 0.000 0.259 335.3 0.031 0.013 0.000 0.259 335.3 0.032 0.016 0.911 0.259 335.4 0.033 0.018 1.873 0.259 335.5 0.033 0.021 3.920 0.259 335.6 0.039 0.023 6.416 0.259 335.7 0.035 0.026 9.292 0.259 335.7 0.036 0.029 12.50 0.259 335.8 0.037 0.032 16.01 0.259 335.9 0.038 0.035 19.81 0.259 336.0 0.039 0.038 23.86 0.259 336.0 0.040 0.041 28.15 0.259 336.1 0.041 0.049 32.67 0.259 336.2 0.042 0.097 37.92 0.259 336.3 0.043 0.050 42.37 0.259 336.4 0.044 0.054 47.53 0.259 336.4 0.045 0.057 52.88 0.259 336.5 0.046 0.061 58.41 0.259 336.6 0.046 0.064 64.13 0.259 336.7 0.097 0.068 70.02 0.259 336.7 0.048 0.072 76.08 0.259 336.8 0.049 0.075 82.31 0.259 336.9 0.050 0.079 88.70 0.259 337.0 0.051 0.083 95.24 0.259 337.1 0.052 0.087 101.9 0.259 337.1 0.053 0.091 108.8 0.259 337.2 0.054 0.095 115.8 0.259 337.3 0.055 0.100 122.9 0.259 337.4 0.056 0.104 130.2 0.259 337.4 0.057 0.109 137.6 0.259 337.5 0.058 0.113 195.2 0.259 337.6 0.059 0.118 152.9 0.259 337.7 0.060 0.122 160.7 0.259 337.8 0.062 0.127 168.6 0.259 337.8 0.063 0.132 176.7 0.259 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389968 50 year 0.420113 100 year 0.450018 Flow Frequency Return Periods for Return Period Flow(cfs) 2 year 0.255069 5 year 0.311678 10 year 0.346879 25 year 0.389468 50 year 0.420113 100 year 0.950018 Developed Unmitigated Flow Frequency Return Periods for Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Developed Mitigated Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.245 0.000 1957 0.389 0.127 1958 0.223 0.000 1959 0.259 0.000 1960 0.286 0.000 1961 0.193 0.000 1962 0.205 0.000 1963 0.922 0.077 1969 0.299 0.000 1965 0.283 0.000 1966 0.197 0.000 1967 0.247 0.000 1968 0.190 0.000 1969 0.187 0.000 1970 0.187 0.000 1971 0.232 0.000 1972 0.290 0.000 1973 0.219 0.000 1974 0.256 0.000 1975 0.221 0.000 1976 0.256 0.000 1977 0.323 0.009 1978 0.274 0.000 1979 0.326 0.000 1980 0.245 0.000 1981 0.281 0.000 1982 0.323 0.000 1983 0.346 0.051 1984 0.212 0.000 1985 0.244 0.000 1986 0.275 0.000 1987 0.302 0.000 1988 0.162 0.000 1989 0.199 0.000 1990 0.383 0.092 1991 0.405 0.106 1992 0.238 0.000 1993 0.174 0.000 1994 0.194 0.000 1995 0.281 0.000 1996 0.285 0.000 1997 0.229 0.000 1998 0.321 0.000 1999 0.276 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.4046 0.1063 2 0.3891 0.0923 3 0.3833 0.0766 9 0.3463 0.0508 5 0.3262 0.0085 6 0.3235 0.0000 7 0.3226 0.0000 8 0.3215 0.0000 9 0.3017 0.0000 10 0.2987 0.0000 11 0.2896 0.0000 1-2 0.2856 0.0000 13 0.2848 0.0000 14 0.2833 0.0000 15 0.2811 0.0000 16 0.2806 0.0000 17 0.2761 0.0000 18 0.2746 0.0000 19 0.2741 0.0000 ?0 0.2594 0.0000 21~ 0.2562 0.0000 22 0.2555 0.0000 23 0.2467 0.0000 29 0.2451 0.0000 25 0.2447 0.0000 26 0.2443 0.0000 27 0.2380 0.0000 28 0.2324 0.0000 29 0.2295 0.0000 30 0.2230 0.0000 31 0.2214 0.0000 32 0.2194 0.0000 33 0.2119 0.0000 34 0.2049 0.0000 35 0.1973 0.0000 36 0.1938 0.0000 37 0.1937 0.0000 38 0.1925 0.0000 39 0.1897 0.0000 40 0.1869 0.0000 41 0.1866 0.0000 42 0.1744 0.0000 43 0.1619 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1275 1044 0 .0 Pass 0.1305 972 0 .0 Pass 0.1334 898 0 .0 Pass 0.1364 829 0 .0 Pass 0.1394 774 0 .0 Pass 0.1423 716 0 .0 Pass 0.1453 660 0 .0 Pass 0.1482 613 0 .0 Pass 0.1512 563 0 .0 Pass 0.1541 523 0 .0 Pass 0.1571 487 0 .0 Pass 0.1600 451 0 .0 Pass 0.1630 427 0 .0 Pass 0.1660 392 0 .0 Pass 0.1689 356 0 .0 Pass 0.1719 334 0 .0 Pass 0.1798 314 0 .0 Pass 0.1778 296 0 .0 Pass 0.1807 271 0 .0 Pass 0.1837 252 0 .0 Pass 0.1866 237 0 .0 Pass 0.1896 215 0 .0 Pass 0.1926 197 0 .0 Pass 0.1955 182 0 .0 Pass 0.1985 170 0 .0 Pass 0.2014 163 0 .0 Pass 0.2044 158 0 .0 Pass 0.2073 151 0 .0 Pass 0.2103 145 0 .0 Pass 0.2132 141 0 .0 Pass 0.2162 137 0 .0 Pass 0.2191 130 0 .0 Pass 0.2221 119 0 .0 Pass 0.2251 112 0 .0 Pass 0.2280 107 0 .0 Pass 0.2310 101 0 .0 Pass 0.2339 94 0 .0 Pass 0.2369 89 0 .0 Pass 0.2398 86 0 .0 Pass 0.2428 78 0 .0 Pass 0.2457 73 0 .0 Pass 0.2487 70 0 .0 Pass 0.2517 65 0 .0 Pass 0.'2546 61 0 .0 Pass 0.2576 57 0 .0 Pass 0.2605 52 0 .0 Pass 0.2635 47 0 .0 Pass 0.2664 47 0 .0 Pass 0.2699 43 0 .0 Pass 0.2723 40 0 .0 Pass 0.2753 37 0 .0 Pass 0.2783 39 0 .0 Pass 0.2812 29 0 .0 Pass 0.2842 27 0 .0 Pass 0.2871 25 0 .0 Pass 0.290] 24 0 .0 Pass 0.2930 21 0 .0 Pass 0.2960 20 0 .0 Pass 0.2989 19 0 .0 Pass 0.3019 17 0 .0 Pass 0.3049 16 0 .0 Pass 0.3078 16 0 .0 Pass 0.3108 16 0 .0 Pass 0.3137 14 0 .0 Pass 0.3167 12 0 .0 Pass 0.3196 12 0 .0 Pass 0.3226 11 0 .0 Pass 0.3255 9 0 .0 Pass 0.3285 8 0 .0 Pass 0.3315 8 0 .0 Pass 0.3394 8 0 .0 Pass 0.3374 8 0 .0 Pass 0.3403 8 0 .0 Pass 0.3433 7 0 .0 Pass 0.3462 7 0 .0 Pass 0.3492 5 0 .0 Pass 0.3521 5 0 .0 Pass 0.3551 5 0 .0 Pass 0.3581 5 0 .0 Pass 0.3610 5 0 .0 Pass 0.3640 5 0 .0 Pass 0.3669 5 0 .0 Pass 0.3699 5 0 .0 Pass 0.3728 5 0 .0 Pass 0.3758 5 0 .0 Pass 0.3787 5 0 .0 Pass 0.3817 5 0 .0 Pass 0.3846 4 0 .0 Pass 0.3876 9 0 .0 Pass 0.3906 2 0 .0 Pass 0.3935 2 0 .0 Pass 0.3965 2 0 .0 Pass 0.3999 2 0 .0 Pass 0.4024 2 0 .0 Pass 0.4053 1 0 .0 Pass 0.4083 1 0 .0 Pass 0.4112 1 0 .0 Pass 0.4142 1 0 .0 Pass 0.4172 1 0 .0 Pass 0.4201 1 0 .0 Pass Water Quality SMP Flow and Volume. On-line facility volume: 0.029 acre-feet On-line facility target flow: 0.12 cfs. Adjusted for 15 min: 0.14 cfs. Off-line Facility target flow: 0.08 cfs. Adjusted for 15 min: 0.09 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranttes of program and accompanying docurnenLation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. ~a~ +8;~777k;ekkkkv?C6t'~C9?~?iibN3.ht>GG4C<kkkkkkk "~ LO t,) v ~ 04~ ~ QoQ4~~~yO''xj0°~ o Ptedeuelo ed ~ toE-t x DeUelopec~~iitigated U x- tq ~c tJ t0E2 1 10 20 30 40 30 60 70 80 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frectuencv Chart ~ o Predeveloped 0 q x Developed wig FecilRp 0 35 - e 0 27 - - - - s - _~ - 41 rT ~ 013 __ _~ U _N 10E•5 ~ 10E•4 10E•3 10E~2 10E•1 1 10 Percent Exceedin Yearly Peaks for developed W/O Pond Duration Graph TEAR .FLOW {rfs) 100 ` 1138 ~-~ ~~ '1 ~ 3 f '~; ;t I; I ~~ ' i ~ r 50 =7701 ~'; i~ ~~. ' ~ ~ ;~ ~~ [[10 2 ~681pp - ..,~. ~ .w.., ; i J ~t J~V ~_ i i ~~' ~F i ~ SQ$9 P i3 QA early Peaks for Developed W/Pond CLEARHIS BSN E1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN E1 0 08 8 00 0 0273 0 42 SBUH/SCS TYPE1A 6 mo BSN E1 0.14 8 00 0 0480 0 42 SBUH/SCS TYPEIA 2 yr BSN E1 0.23 8 00 0 0788 0 42 SBUH/SCS TYPEIA 10 yr BSN E1 0 27 8 00 0 0947 0 42 SBUH/SCS TYPE1A 25 yr BSN E1 0 29 8 00 0 1027 0 42 SBUH/SCS TYPE1A 50 yr BSN E1 0 32 8 00 0 1108 0 42 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN E1 Hyd Method: SBUH Hyd Loss Method SCS CN Number Peak Factor: 484.00 SCS Abs: 0.20 Storm Dur 24 00 hrs Intv: 10 00 min Area CN TC Pervious 0.1250 ac 78 00 0 03 hrs Impervious 0.2906 ac 98.00 0 09 hrs Total 0 4156 ac Supporting Data: Pervious CN Data: Type B Soils Hydrologic Group 78.00 0 1250 ac Impervious CN Data: ROADWAY 98 00 0 2131 ac SIDWALK 98.00 0.0316 ac DRIVEWAY 98.00 0 0459 ac Pervious TC Data: Flow type: Description: Length: Slope• Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2.00% 0 2400 1 90 min Impervious TC Data: Flow type Description: Length: Slope• Coeff: Travel Time Shallow Along Flow Line of Gutter 237 00 ft 0.50% 27 0000 2 75 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0.40 min Channel Through Strom Water Pipe 150.00 ft 0 50% 21.0000 1.68 min Sheet Across Sidewalks 5 00 ft 2.00% 0 0110 0 14 mm Sheet Across Driveway 20.00 ft 2 00% 0 0110 0.42 min BSN E2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ramtype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN E2 0 09 7 83 0 0308 0 43 SBUH/SCS TYPE1A 6 mo BSN E2 0 16 7 83 0 0534 0 43 SBUH/SCS TYPE1A 2 yr BSN E2 0 26 7 83 0 0864 0 43 SBUH/SCS TYPEIA 10 yr BSN E2 0 31 7 83 0 1033 0 43 SBUH/SCS TYPEIA 25 yr BSN E2 0 34 7 83 0 1118 0 43 SBUH/SCS TYPE1A 50 yr BSN E2 0 36 7 83 0 1204 0 43 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN E2 Hyd Method. SBUH Hyd Loss Method• SCS CN Number Peak Factor: 484.00 SCS Abs: 0 20 Storm Dur• 24 00 hrs Intv 10.00 min Area CN TC Pervious 0 0986 ac 78 00 0 03 hrs Impervious 0 3341 ac 98.00 Total 0.4327 ac Supporting Data: Pervious CN Data: Type B Soils Hydraulic Group 78.00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description• Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway 0.05 hrs 0.0986 ac 0 2251 ac 0 0287 ac 0 0803 ac Length• Slope. Coeff' Travel Time 6.00 ft 2.00% 0 2400 1.90 min Length: Slope. Coeff: Travel Time 263 00 ft 3 28% 27.0000 0.90 min 1850 ft 200% 00110 040 min 100.00 ft 0.50% 21.0000 1 12 min 5.OOft 200% 00110 0.14 mm 20 00 ft 2.00% 0.0110 0.42 min ADDHYD [BSN E1] AS [6 mo] [BSN E2] AS [6 mo] TO [BSN E1 +BSN E2] Peak Flow 0 1690 cfs Peak Time. 7 83 hrs Hyd Vol 2530 78 cf - 0.0581 acft ADDHYD (BSN E1] AS [2 yr] [BSN E2] AS [2 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.2914 cfs Peak Time: 7 83 hrs Hyd Vol 4417 21 cf - 0 1014 acft ADDHYD [BSN E1] AS [10 yr] [BSN E2] AS [10 yr] TO [BSN E1 +BSN E2] Peak Flow 0.4802 cfs Peak Time 7 83 hrs Hyd Vol 7194 70 cf - 0.1652 acft ADDHYD [BSN E1] AS [25 yr] [BSN E2] AS [25 yr] TO [BSN E1 +BSN E2] Peak Flow: 0.5777 cfs Peak Time: 7.83 hrs Hyd Vol 8624 23 cf - 0 1980 acft ADDHYD [BSN E1] AS [50 yr] [BSN E2] AS (50 yr] TO [BSN E1 +BSN E2] Peak Flow 0.6270 cfs Peak Time: 7.83 hrs Hyd Vol: 9345 61 cf - 0.2145 acft ADDHYD [BSN E1] AS [100 yr] [BSN E2] AS [100 yr] TO [BSN E1 +BSN E2] Peak Flow. 0.6766 cfs Peak Time: 7.83 hrs Hyd Vol: 10071.01 cf - 0 2312 acft Hydrograph ID: BASIN E Area 0 8483 ac Hyd Int 10 00 min Base Flow• Peak Flow. 0 6766 cfs Peak Time. 7.83 hrs Hyd Vol: 0.2312 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0022 8 67 0 2738 16 50 0 0953 0 83 0 0084 8 83 0 2360 16 67 0 0953 1 00 0 0154 9 00 0 2424 16 83 0 0954 1 17 0 0233 9 17 0 2057 17 00 0 0954 1 33 0 0307 9 33 0 1785 17 17 0 0917 1 50 0 0355 9 50 0 1833 17 33 0 0888 1 67 0 0414 9 67 0 1714 17 50 0 0893 1 83 0 0465 9 83 0 1638 17 67 0 0892 2 00 0 0496 10 00 0 1653 17 83 0 0893 2 17 0 0545 10 17 0 1544 18 00 0 0893 2 33 0 0587 10 33 0 1462 18 17 0 0856 2 50 0 0607 10 50 0 1478 18 33 0.0827 2 67 0 0627 10 67 0 1403 18 50 0 0832 2 83 0 0643 10 83 0 1349 18 67 0 0831 3 00 0 0658 11 00 0 1360 18 83 0 0832 3 17 0 0670 11 17 0 1322 19 00 0 0832 3 33 0 0681 11 33 0 1296 19 17 0 0794 3 50 0 0691 11 50 0 1302 19 33 0 0765 3 67 0 0724 11 67 0 1265 19 50 0 0770 3 83 0 0754 11 83 0 1239 19 67 0 0768 4 00 0 0759 12 00 0 1245 19 83 0 0769 4 17 0 0817 12 17 0 1208 20 00 0 0769 4 33 0 0868 12 33 0 1180 20 17 0 0770 4 50 0 0870 12 50 0 1186 20 33 0 0770 4 67 0 0929 12 67 0 1149 20 50 0 0770 4 83 0 0983 12 83 0 1121 20 67 0 0771 5 00 0 0992 13 00 0 1127 20 83 0 0771 5 17 0 1060 13 17 0 1126 21 00 0 0771 5 33 0 1119 13 33 0 1128 21 17 0 0771 5 50 0 1127 13 50 0 1129 21 33 0 0772 5 67 0 1198 13 67 0 1093 21 50 0 0772 5 83 0 1258 13 83 0 1064 21 67 0.0772 6 00 0 1265 14 00 0 1070 21 83 0 0773 6 17 0 1397 14 17 0 1069 22 00 0 0773 6 33 0 1509 14 33 0 1071 22 17 0 0735 6 50 0.1511 14 50 0 1071 22 33 0 0705 6.67 0 1711 14 67 0 1035 22 50 0.0711 6 83 0 1878 14 83 0 1006 22 67 0 0709 7 00 0 1876 15 00 0 1012 22 83 0 0710 717 02119 1517 01011 2300 00710 7 33 0 2319 15 33 0 1012 23 17 0 0710 7 50 0 2315 15 50 0 1012 23 33 0 0710 7 67 0 4731 15 67 0 0976 23 50 0 0710 7 83 0 6766 15 83 0 0947 23 67 0 0711 8 00 0 6603 16 00 0 0952 23 83 0.0711 8 17 0 4714 16 17 0 0951 24 00 0 0711 8 33 0 3056 16 33 0 0952 24 17 0 0287 8 50 0 3343 16 50 0 0953 24 33 0 0005 Hydrograph ID: BASIN E Area: 0.8483 ac Hyd Int 10.00 min Base Flow: Peak Flow: 0 6766 cfs Peak Time: 7.83 hrs Hyd Vol: 0.2312 acft MOVEHYD [BASIN E] TO [BASIN E - 6 mo] AS [6 mo] Peak Flow 0.1690 cfs Peak Time: 7 83 hrs Hyd Vol 2530 78 cf - 0.0581 acft MOVEHYD [BASIN E] TO [BASIN E -100 yr] AS [100 yr] Peak Flow: 0 6766 cfs Peak Time: 7 83 hrs Hyd Vol: 10071.01 cf - 0.2312 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 329 0000 ft 335 3000 ft 0 10 Infd 10.00 in/hr Multiplier 1.00 Reach ID: BASIN E BIOSWALE Section Properties: Shape. Ditch Size Material Mannings n Corr Metal -normal Length Slope Entrance Loss 70 0000 ft 0.10 Routing Method Travel Time Translation Hyd params By 0.0250 Mannings Formula v Width Bank Hgt ss1 ss2 16.0000 ft 3.0000 ft 3 OOh:1v 3.OOh•1v Up Node Dn Node Up Invert Dn Invert DUMMY E 0 0000 ft 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3 0000 ft 0 5000 ft 2 0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.0000 ac 0 0000 cf 0 0000 cf 0 0000 ft/s 0 0000 ft Ent Loss Exit Loss Frict Loss Start TW 0 000000 ft 0 000000 ft 0 000000 ft 0.0000 ft ROUTEHYD [BASIN E - 6 MO] THRU [BASIN E BIOSWALE] USING THUR100Y AND [6 MO ] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0.8483 0 1690 ---- 1 00 0 1324 Ditch 0 4732 ----- BASIN E ROUTEHYD [BASIN E - 100 YR] THRU [BASIN E BIOSWALE] USING THUR100Y AND [100 YR] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BASIN E BIOSWALE E 0 8483 0 6766 ---- 1 00 0 2850 Ditch 0 7627 ----- BASIN E Node ID: INFILTRATION E Desc• Manhole structure Start EI• 335 3000 ft Max EI. 336 3000 ft Contrib Basin: Contrib Hyd. Length Width Void Ratio 70 0000 ft 16 0000 ft 39 00 Node ID: BASIN E RPL Desc Manhole structure Start EI• 335.3000 ft Max EI. 336 3000 ft Contrib Basin• Contrib Hyd. Storage Id: INFILTRATION E Discharge Id INFILTRATION RLPCOMPUTE [BASIN E RPL] SUMMARY 100 YR MatchQ=PeakQ= 0.6766 cfs Peak Out Q: 0 2232 cfs -Peak Stg 336 55 ft - Active Vol: 1087.95 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 -Q PROJECT REPORT a Project Name: Tahoma Terra_BASIN -C Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin C Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 DEVELOPED LAND USE Basin Basin C Flows To Bio-Infiltration Swale C Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale C Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. T1i mcnci nnc Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. 0.027 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 331.7 0.046 0.000 0.000 0.000 331.8 0.048 0.004 0.000 0.463 331.9 0.050 0.007 0.000 0.463 331.9 0.053 0.012 0.000 0.963 332.0 0.055 0.016 0.000 0.463 c^ a ~ ._ 4 ~, ', 4 1 ~~'rk~~~'d` OV rZQ`O~ IXPIRES• ! 1-2?- 332.1 0.057 0.020 0.000 0.463 332 s2 0.060 0.025 0.000 0.463 ° 332.2 0.062 0.029 0.411 0.463 332.3 0.064 0.034 1.873 0.463 332.4 0.067 0.039 3.920 0.463 332.5 0.069 0.095 6.416 0.463 332.6 0.071 0.050 9.292 0.463 332.6 0.074 0.056 12.50 0.463 332.7 0.076 0.061 16.01 0.463 332.8 0.078 0.067 19.81 0.463 332.9 0.081 0.074 23.86 0.463 332.9 0.083 0.080 28.15 0.463 333.0 0.086 0.087 32.67 0.463 333.1 0.088 0.093 37.42 0.963 333.2 0.090 0.100 42.37 0.463 333.3 0.093 0.107 47.53 0.463 333.3 0.095 0.115 52.88 0.463 333.4 0.098 0.122 58.41 0.963 333.5 0.100 0.130 64.13 0.963 333.6 0.103 0.138 70.02 0.963 333.6 0.105 0.196 76.08 0.463 333.7 0.108 0.154 82.31 0.463 333.8 0.110 0.163 88.70 0.463 333.9 0.113 0.171 95.24 0.463 334.0 0.115 0.180 101.9 0.963 334.0 0.118 0.189 108.8 0.963 334.1 0.120 0.199 115.8 0.463 334.2 0.123 0.208 122.9 0.463 334.3 0.126 0.218 130.2 0.963 334.3 0.128 0.228 137.6 0.463 334.4 0.131 0.238 145.2 0.963 334.5 0.133 0.248 152.9 0.963 334.6 0.136 0.258 160.7 0.963 334.7 0.139 0.269 168.6 0.463 334.7 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.353994 5 year 0.431074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Return Period 2 year 5 year 10 year 25 year 50 year 100 year Periods for Developed Unmita.gated Flow(cfs) 0.353999 0.931074 0.478881 0.53661 0.578083 0.618503 Flow Frequency Return Pera.ods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.334 0.000 1957 0.540 0.000 1958 0.310 0.000 1959 0.362 0.000 1960 0.399 0.000 1961 0.265 0.000 1962 0.286 0.000 1963 0.575 0.000 1964 0.417 0.000 1965 0.391 0.000 1966 0.275 0.000 1967 0.337 0.000 1968 0.269 0.000 1969 0.261 0.000 1970 0.260 0.000 1971 0.324 0.000 1972 0.387 0.000 1973 0.306 0.000 1974 0.357 0.000 1975 0.309 0.000 1976 0.356 0.000 1977 0.450 0.000 1978 0.383 0.000 1979 0.455 0.000 1980 0.342 0.000 1981 0.391 0.000 1982 0.452 0.000 1983 0.483 0.000 1984 0.295 0.000 1985 0.341 0.000 1986 0.380 0.000 1987 0.407 0.000 1988 0.226 0.000 1989 0.270 0.000 1990 0.533 0.000 1991 0.540 0.000 1992 0.332 0.000 1993 0.243 0.000 1999 0.270 0.000 1995 0.392 0.000 1996 0.398 0.000 1997 0.320 0.000 1998 0.449 0.000 1999 0.385 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5397 0.0000 2 0.5395 0.0000 3 0.5326 0.0000 4 0.4834 0.0000 5 0.4554 0.0000 6 0.4515 0.0000 7 0.4503 0.0000 8 0.4488 0.0000 9 0.4169 0.0000 10 0.4075 0.0000 11 0.3986 0.0000 12 0.3976 0.0000 13 0.3917 0.0000 14 0.3914 0.0000 15 0.3907 0.0000 16 0.3866 0.0000 17 0.3855 0.0000 18 0.3826 0.0000 19 0.3797 0.0000 20 0.3622 0.0000 0.3567 0.0000 0.3559 0.0000 0.3415 0.0000 0.3411 0.0000 0.3366 0.0000 0.3343 0.0000 0.3322 0.0000 0.3236 0.0000 0.3203 0.0000 0.3101 0.0000 0.3090 0.0000 0.3063 0.0000 0.2949 0.0000 0.2861 0.0000 0.2755 0.0000 0.2705 0.0000 0.2704 0.0000 0.2655 0.0000 0.2640 0.0000 0.2608 0.0000 0.2605 0.0000 0.2439 0.0000 0.2260 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1770 1060 0 .0 Pass 0.1810 979 0 .0 Pass 0.1851 906 0 .0 Pass 0.1892 836 0 .0 Pass 0.1932 785 0 .0 Pass 0.1973 717 0 .0 Pass 0.2013 669 0 .0 Pass 0.2054 624 0 .0 Pass 0.2094 584 0 .0 Pass 0.2135 538 0 .0 Pass 0.2175 503 0 .0 Pass 0.2216 461 0 .0 Pass 0.2256 435 0 .0 Pass 0.2297 399 0 .0 Pass 0.2337 365 0 .0 Pass 0.2378 342 0 .0 Pass 0.2418 315 0 .0 Pass 0.2459 297 0 .0 Pass 0.2499 278 0 .0 Pass 0.2590 256 0 .0 Pass 0.2580 238 0 .0 Pass 0.2621 221 0 .0 Pass 0.2661 200 0 .0 Pass 0.2702 189 0 .0 Pass 0.2742 172 0 .0 Pass 0.2783 167 0 .0 Pass 0.2823 161 0 .0 Pass 0.2869 155 0 .0 Pass 0.2909 147 0 .0 Pass 0.2995 142 0 .0 Pass 0.2985 138 0 .0 Pass 0.3026 137 0 .0 Pass 0.3066 126 0 .0 Pass 0.3107 117 0 .0 Pass 0.3197 109 0 .0 Pass 0.3188 104 0 .0 Pass 0.3228 98 0 .0 Pass 0.3269 91 0 .0 Pass 0.3309 87 0 .0 Pass 0.3350 80 0 .0 Pass 0.3391 74 0 .0 Pass 0.3431 67 0 .0 Pass 0.3472 66 0 .0 Pass 0.3512 60 0 .0 Pass 0. ~°553 58 0 . 0 Pass 0.3593 54 0 .0 Pass 0.3634 50 0 .0 Pass 0.3674 96 0 .0 Pass 0.3715 46 0 .0 Pass 0.3755 41 0 .0 Pass 0.3796 38 0 .0 Pass 0.3836 36 0 .0 Pass 0.3877 34 0 .0 Pass 0.3917 29 0 .0 Pass 0.3958 26 0 .0 Pass 0.3998 23 0 .0 Pass 0.4039 23 0 .0 Pass 0.4079 20 0 .0 Pass 0.4120 19 0 .0 Pass 0.4160 18 0 .0 Pass 0.4201 16 0 .0 Pass 0.4241 16 0 .0 Pass 0.4282 16 0 .0 Pass 0.9322 15 0 .0 Pass 0.4363 19 0 .0 Pass 0.4403 12 0 .0 Pass 0.4444 12 0 .0 Pass 0.4484 12 0 .0 Pass 0.9525 9 0 .0 Pass 0.4565 8 0 .0 Pass 0.9606 8 0 .0 Pass 0.4646 8 0 .0 Pass 0.4687 8 0 .0 Pass 0.4727 8 0 .0 Pass 0.4768 6 0 .0 Pass 0.4809 6 0 .0 Pass 0.4849 5 0 .0 Pass 0.4890 5 0 .0 Pass 0.4930 5 0 .0 Pass 0.9971 5 0 .0 Pass 0.5011 5 0 .0 Pass 0.5052 5 0 .0 Pass 0.5092 5 0 .0 Pass 0.5133 5 0 .0 Pass 0.5173 5 0 .0 Pass 0.5219 5 0 .0 Pass 0.5254 5 0 .0 Pass 0.5295 5 0 .0 Pass 0.5335 4 0 .0 Pass 0.5376 4 0 .0 Pass 0.5416 1 0 .0 Pass 0.5457 1 0 .0 Pass 0.5497 1 0 .0 Pass 0.5538 1 0 .0 Pass 0.5578 1 0 .0 Pass 0.5619 1 0 .0 Pass 0.5659 1 0 .0 Pass 0.5700 1 0 .0 Pass 0.5740 1 0 .0 Pass 0.5781 0 0 .0 Pass Water Quality HMP Flow and Volume. On-line facility volume: 0.189 acre-feet On-line facility target £low: 0.19 cfs. Adjusted for 15 m1n: 0.22 cfs. Off-line facility target flow: 0.11 cfs. Adjusted for 15 min: 0.12 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1QU kkkkXkXkXkk?~4,'~0~+~'~DPMSG6000tkkkkkXkkkkkk .~~. 1.0 ~ pOOOOOOO~c~~4aaaaQ~aOO ~ o Predeveloped ,~ 10E4 x Developed Mitigated U _~ t3 t0E-2 1 10 20 30 d0 30 60 70 80 90 99 Gu__mulative Probability__ _ _ _ _ YEAR ~ FLOW (cfs) 1t~ 6185 --°-~-~--- o Predeveloped 50 5781 -~-- ~ ~ ~ j i I ? i ~ } ~ x Developed w8h Factlity 25 5366 --- . 1` ~ ~ ~ i ;1 0 ,~ . _ . ~ . , . . 10 .4789 }}, 3 , ' ~ ~ 0 38 - _ _ _ , ,_.. _ . 5 4311 ~~i~f ~ ~ "~~' 0 28 2 ; 35x0 ; ~. ~ . _~.._W, _l~a~_ ~ .t,_ ~ 0.18 _ _ ___ ~ _ ~ _ _ _-- _ _ 111111) ~~ ~ ~ ~~:~ F ; ; 10E-5 ~ 106d 10E•3 10E-2 10E•1 1 10 Percent Exceedin arty Peaks for developed W/O Pond YEAR f FLOW (~) 100 11 38 ~, g ~ f!', ~~' lI 50 7701 '; ;' ~ ~i=, 3~, ',j z ii~ 25 5 045 , , ~~ j ,~ 10 2.681 --.~'-°°_° s_.,. ~ ~ ~ ~ . 3 I 5 1518 '_- -- i=~, ~ 2 5459 ~- ~ ~: ~ 1 7 i ~ i Duration Graph early Peaks for Developed W/Pond Yearly Peaks for Predeveloped Flow Frequency Chart CLEARHIS BSN C1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN C1 0 12 8 00 BSN C1 0 20 8 00 BSN C1 0 32 8 00 BSN C1 0 38 8 00 BSN C1 0 40 8 00 BSN C1 0 43 8 00 yr Drainage Area: BSN C1 Hyd Method• SBUH Hyd Peak Factor: 484 00 Storm Dur: 24.00 hrs Area CN Pervious 0.0491 ac 78 00 Impervious 0 4528 ac 98 00 Total 0 5019 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98.00 SIDWALK 98 00 DRIVEWAY 98 00 Pervious TC Data: Flow type: Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description. Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN C2 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN C2 0 11 8 00 BSN C2 0 18 8 00 BSN C2 0 29 8 00 BSN C2 0 35 8 00 BSN C2 0 38 8 00 BSN C2 0 40 8 00 yr Drainage Area: BSN C2 Hyd Method• SBUH Hyd Peak Factor 484 00 Storm Dur: 24.00 hrs Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0407 0.50 SBUH/SCS TYPEIA 6 mo 0 0689 0 50 SBUH/SCS TYPEIA 2 yr 0 1091 0 50 SBUH/SCS TYPE1A 10 yr 0 1294 0 50 SBUH/SCS TYPEIA 25 yr 0 1396 0 50 SBUH/SCS TYPEIA 50 yr 0 1498 0 50 SBUH/SCS TYPEIA 100 Loss Method SCS Abs: Intv. TC 0.03 hrs 010 hrs SCS CN Number 0 20 10 00 min 0.0491 ac 0 3095 ac 0.1204 ac 0 0229 ac Length: Slope: Coeff. Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length: Slope. Coeff. Travel Time 272.00 ft 0.50% 27 0000 3.15 min 2700 ft 200% 00110 0.54 min 150.00 ft 0.50% 21.0000 1.68 min 12 00 ft 2 00% 0 0110 0 28 min 20 00 ft 2 00% 0.0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0365 0 50 SBUH/SCS TYPEIA 6 mo 0 0628 0 50 SBUH/SCS TYPEIA 2 yr 0 1011 0 50 SBUH/SCS TYPE1A 10 yr 0 1207 0 50 SBUH/SCS TYPEIA 25 yr 0 1306 0 50 SBUH/SCS TYPEIA 50 yr 0 1405 0 50 SBUH/SCS TYPEIA 100 Loss Method: SCS CN Number SCS A bs: 0 20 Intv. 10 00 min Area CN TC Pervious 0.0997 ac 78 00 0 03 hrs Impervious 0 3977 ac 98.00 0.10 hrs Total 0.4974 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0997 ac Impervious CN Data: ROADWAY 98 00 0 2486 ac SIDWALK 98 00 0 0343 ac DRIVEWAY 98.00 0.1148 ac Pervious TC Data: Flow type: Description: Length. Slope: Coeff. Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type: Description: Length Slope• Coeff Travel Time Shallow Along Flow Line of Gutter 292 00 ft 0 50% 27.0000 3 39 min Sheet Across Roadway 18 50 ft 2.00% 0 0110 0.40 min Channel Through Strom Water Pipe 150 00 ft 0.50% 21 0000 1 68 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0.14 min Sheet Across Driveway 20.00 ft 2.00% 0 0110 0.42 min BSN C3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C3 0 07 7 83 0 0243 0 35 SBUH/SCS TYPEIA 6 mo BSN C3 0 12 7 83 0 0424 0 35 SBUH/SCS TYPEIA 2 yr BSN C3 0 20 7 83 0 0689 0 35 SBUH/SCS TYPE1A 10 yr BSN C3 0 24 7 83 0 0825 0 35 SBUH/SCS TYPEIA 25 yr BSN C3 0 26 7 83 0 0894 0 35 SBUH/SCS TYPE1A 50 yr BSN C3 0 28 7 83 0 0963 0 35 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN C3 Hyd Method. SBUH Hyd Loss Method• SC S CN Number Peak Factor: 484 00 SCS Abs 0 2 0 Storm Dur: 24 00 hrs Intv: 10 00 min Area CN TC Pervious 0.0891 ac 78.00 0 03 hrs Impervious 0.2621 ac 98 00 0.06 hrs Total 0.3512 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0 0891 ac Impervious CN Data: DRIVEWAY 98.00 0 0688 ac SIDWALK 98 00 0 0275 ac ROADWAY 98 00 0 1658 ac Pervious TC Data: Flow type. Description: Length Slope. Coeff: Travel Time Sheet Across Planter Stnp 6.00 ft 2 00% 0.2400 1.90 min Impervious TC Data: Flow type. Description: Length. Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 217.00 ft 1 27% 27 0000 1.19 min Sheet Across Roadway 18.50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe 180.00 ft 0.50% 21 0000 2.02 min Sheet Across Sidewalks 5 00 ft 2.00% 0 0110 0 14 min ADDHYD [BSN C1] AS (6 mo] [BSN C2] AS [6 mo] TO [BSN C1 +BSN C2] Peak Flow 0.2269 cfs Peak Time• 8 00 hrs Hyd Vol. 3362 93 cf - 0 0772 acft ADDHYD [BSN C1] AS [2 yr] [BSN C2] AS [2 yr] TO [BSN C1 +BSN C2] Peak Flow. 0 3842 cfs Peak Time 8.00 hrs Hyd Vol. 5739 11 cf - 0 1318 acft ADDHYD [BSN C1] AS [10 yr] [BSN C2] AS [10 yr] TO [BSN C1 +BSN C2] Peak Flow• 0.6091 cfs Peak Time 8 00 hrs Hyd Vol 9155.95 cf - 0.2102 acft ADDHYD [BSN C1] AS [25 yr] [BSN C2] AS [25 yr] TO [BSN C1 +BSN C2] Peak Flow: 0 7229 cfs Peak Time. 8 00 hrs Hyd Vol 10893.56 cf - 0 2501 acft ADDHYD [BSN C1] AS [50 yr] [BSN C2] AS [50 yr] TO [BSN C1 +BSN C2] Peak Flow• 0 7800 cfs Peak Time• 8 00 hrs Hyd Vol: 11766.94 cf - 0.2701 acft ADDHYD [BSN C1] AS [100 yr] [BSN C2] AS [100 yr] TO [BSN C1 +BSN C2] Peak Flow 0 8373 cfs Peak Time: 8 00 hrs Hyd Vol: 12643 01 cf - 0 2902 acft ADDHYD [BSN C1 +BSN C2] AS [6 mo] [BSN C3] AS [6 mo] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow 0.2969 cfs Peak Time: 8 00 hrs Hyd Vol• 4421 34 cf - 0 1015 acft ADDHYD [BSN C1 +BSN C2] AS [2 yr] [BSN C3] AS [2 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 0.5042 cfs Peak Time 8 00 hrs Hyd Vol 7588 15 cf - 0.1742 acft ADDHYD [BSN C1 +BSN C2] AS [10 yr] [BSN C3] AS [10 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow 0.8091 cfs Peak Time• 8.00 hrs Hyd Vol 12157.59 cf - 0.2791 acft ADDHYD [BSN C1 +BSN C2] AS [25 yr] [BSN C3] AS [25 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 1.0200 cfs Peak Time 8 00 hrs Hyd Vol 14488 05 cf - 0.3326 acft ADDHYD [BSN C1 +BSN C2] AS [50 yr] [BSN C3] AS [50 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow. 1 0400 cfs Peak Time• 8 00 hrs Hyd Vol 15659 82 cf - 0 3595 acft ADDHYD [BSN C1 +BSN C2] AS [100 yr] [BSN C3] AS [100 yr] TO [BSN C1 +BSN C2 + BSN C3] Peak Flow: 1.1130 cfs Peak Time 8 00 hrs Hyd Vol 16836.30 cf - 0.3865 acft Hydrograph ID: BASIN C Area: 1.3505 ac Hyd Int 10.00 min Base Flow• Peak Flow: 1.1130 cfs Peak Time 8 00 hrs Hyd Vol. 0 3865 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0.4696 16 50 0 1554 0 83 0 0135 8 83 0 4008 16 67 0 1554 1 00 0 0257 9 00 0 4009 16 83 0 1555 1 17 0 0395 9 17 0 3494 17.00 0 1555 1 33 0 0528 9 33 0 3019 17 17 0 1503 1 50 0 0620 9 50 0 3025 17 33 0 1453 1 67 0 0722 9 67 0 2863 17 50 0.1455 1 83 0 0816 9 83 0 2724 17 67 0 1453 2 00 0 0876 10 00 0 2727 17 83 0 1454 2 17 0 0958 10 17 0 2573 18 00 0 1455 2 33 0 1035 10 33 0 2430 18 17 0 1402 2 50 0 1077 10 50 0 2434 18 33 0 1352 2 67 0 1112 10 67 0 2329 18 50 0 1353 2 83 0 1142 10 83 0 2234 18 67 0 1352 3 00 0 1168 11 00 0 2237 18.83 0 1353 3 17 0 1191 11 17 0 2184 19 00 0 1353 3 33 0 1210 11 33 0 2138 19 17 0 1300 3 50 0 1228 11 50 0 2140 19 33 0 1250 3 67 0 1281 11 67 0 2088 19 50 0 1251 3 83 0 1335 11 83 0 2041 19 67 0 1250 4 00 0 1350 12 00 0 2043 19 83 0 1251 4 17 0 1441 12 17 0 1991 20 00 0 1251 4 33 0 1533 12 33 0 1943 20 17 0 1251 4 50 0 1549 12 50 0 1945 20 33 0 1252 4 67 0 1640 12 67 0 1892 20 50 0.1252 4 83 0 1736 12 83 0 1845 20 67 0 1252 5 00 0 1758 13 00 0 1846 20 83 0 1253 517 01859 1317 01846 2100 01253 5 33 0.1961 13 33 0 1848 21 17 0 1253 5 50 0 1981 13 50 0 1848 21 33 0 1254 5 67 0 2084 13 67 0 1797 21 50 0 1254 5 83 0 2187 13 83 0 1748 21 67 0 1254 6 00 0 2207 14 00 0 1750 21 83 0 1254 6 17 0 2399 14 17 0 1749 22 00 0 1255 6 33 0 2593 14 33 0 1751 22 17 0.1201 6 50 0 2616 14 50 0 1751 22 33 0 1151 6 67 0 2907 14 67 0 1700 22 50 0 1152 6 83 0 3196 14 83 0 1651 22 67 0 1151 7 00 0 3224 15 00 0 1652 22 83 0 1152 7 17 0 3573 15 17 0 1651 23 00 0 1151 7.33 0 3915 15 33 0 1653 23 17 0 1152 7 50 0 3947 15 50 0 1653 23 33 0.1152 7 67 0 7459 15 67 0 1601 23 50 0.1152 7 83 1 0957 15 83 0 1552 23 67 0 1152 8 00 1 1130 16 00 0 1553 23 83 0 1153 8 17 0 8325 16 17 0 1552 24 00 0 1153 8 33 0 5486 16 33 0 1553 24 17 0 0558 8 50 0 5512 16 50 0 1554 24 33 0 0039 Hydrograp h ID: BASIN C Area. 1.3505 ac Hyd Int: 10.00 mm Base Flow: Peak Flow: 1.1130 cfs Peak Time 8.00 hrs Hyd Vol 0.3865 acft MOVEHYD [BASIN C] TO [BASIN C - 6 mo] AS [6 mo] Peak Flow: 0 2969 cfs Peak Time. 8 00 hrs Hyd Vol 4421 34 cf - 0 1015 acft MOVEHYD [BASIN C] TO [BASIN C - 100 yr] AS [100 yr] Peak Flow: 1 1130 cfs Peak Time: 8 00 hrs Hyd Vol: 16836 30 cf - 0.3865 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrlp: Multiple Orlflce Start EI Max EI Increment 326.0000 ft 332 2000 ft 0.10 Infil. 10.00 in/hr Multiplier: 1.00 Reach ID: BIOSWALE C Section Properties: Shape Ditch Routing Method Travel Tlme Translation Size Material Manning n Hyd params By Corr Metal -normal 0 0250 Manning Formula Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3 0000 ft 3.OOh:1 v 3 OOh 1 v Up Node Dn Node Up Invert Dn Invert DUMMY C 0.0000 ft 0 0000 ft Conduit Constraints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0 5000 ft 1.0000 ft 3.0000 ft 0 5000 ft 2 0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0.0000 ac 0 0000 cf O.000Ocf 0 0000 ft/s 0 0000 ft Ent Loss Exit Loss Frict Loss Start TW 0 000000 ft 0 000000 ft 0 000000 ft 0 0000 ft ROUTEHYD [BASIN C - 6 mo] THRU [BIOSWALE C] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE C 1 3505 0 2969 ---- 1 00 0 1004 Ditch 0 6194 ----- BASIN C ROUTEHYD [BASIN C - 100 yr] THRU [BIOSWALE C] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE C 1 3505 1 1130 ---- 1 00 0 2164 Ditch 0 9956 ----- BASIN C Node ID: INFILTRATION C Desc: Manhole structure Start EI: 332.2000 ft Max EI: 333.2000 ft Contrib Basln• Contrib Hyd• Length Width Void Ratio 200 0000 ft 10 0000 ft 39.00 Bottom area only with infiltration Node ID: BASIN C RLP Desc: Manhole structure Start EI~ 332.2000 ft Max EI~ 333 2000 ft Contnb Basin: Contnb Hyd: Storage Id: INFILTRATION C Discharge Id: INFILTRATION RLPCOMPUTE [BASIN C RLP] SUMMARY 100 yr MatchQ=PeakO= 1 1130 cfs Peak Out O. 0 3704 cfs -Peak Stg. 333.40 ft - Active Vol: 1870.37 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT Project Name: Tahoma Terra_BASIN -C Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin C Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 DEVELOPED LAND USE Basin Basin C Flows To Bio-Infiltration Swale C Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale C Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. Pl}11CTCl P1TC Depth: aft. Bottom Length: 200ft. Bottom Width 10ft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 in. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 331.7 0.046 0.000 0.000 0.000 331.8 0.048 0.004 0.000 0.463 331.9 0.050 0.007 0.000 0.463 331.9 0.053 0.012 0.000 0.463 332.0 0.055 0.016 0.000 0.463 ,~ ,; iJ ~r'~ EXPIRES 11-2?- 332.1 0.057 0.020 0.000 0.463 332.2 0.060 0.025 0.000 0.463 332.2 0.062 0.029 0.411 0.463 332.3 0.064 0.039 1.873 0.963 332.4 0.067 0.039 3.920 0.963 332.5 0.069 0.045 6.416 0.463 332.6 0.071 0.050 9.292 0.463 332.6 0.074 0.056 12.50 0.463 332.7 0.076 0.061 16.01 0.463 332.8 0.078 0.067 19.81 0.463 332.9 0.081 0.074 23.86 0.463 332.9 0.083 0.080 28.15 0.463 333.0 0.086 0.087 32.67 0.463 333.1 0.088 0.093 37.42 0.963 333.2 0.090 0.100 42.37 0.463 333.3 0.093 0.107 47.53 0.463 333.3 0.095 0.115 52.88 0.463 333.4 0.098 0.122 58.41 0.463 333.5 0.100 0.130 64.13 0.463 333.6 0.103 0.138 70.02 0.463 333.6 0.105 0.146 76.08 0.463 333.7 0.108 0.159 82.31 0.963 333.8 0.110 0.163 88.70 0.963 333.9 0.113 0.171 95.24 0.963 334.0 0.115 0.180 101.9 0.463 334.0 0.118 0.189 108.8 0.463 334.1 0.120 0.199 115.8 0.463 334.2 0.123 0.208 122.9 0.463 334.3 0.126 0.218 130.2 0.963 334.3 0.128 0.228 13"1.6 0.463 334.4 0.131 0.238 145.2 0.463 334.5 0.133 0.248 152.9 0.463 334.6 0.136 0.258 160.7 0.463 334.7 0.139 0.269 168.6 0.463 334.7 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.353999 5 year 0.931074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.353994 5 year 0.431074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.094867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.339 0.000 1957 0.540 0.000 1958 0.310 0.000 1959 0.362 0.000 1960 0.399 0.000 1961 0.265 0.000 1962 0.286 0.000 1963 0.575 0.000 1964 0.417 0.000 1965 0.391 0.000 1966 0.275 0.000 1967 0.337 0.000 1968 0.264 0.000 1969 0.261 0.000 1970 0.260 0.000 1971 0.324 0.000 1972 0.387 0.000 1973 0.306 0.000 1974 0.357 0.000 1975 0.309 0.000 1976 0.356 0.000 1977 0.450 0.000 1978 0.383 0.000 1979 0.455 0.000 1980 0.342 0.000 1981 0.391 0.000 1982 0.952 0.000 1983 0.483 0.000 1989 0.295 0.000 1985 0.341 0.000 1986 0.380 0.000 1987 0.407 0.000 1988 0.226 0.000 1989 0.270 0.000 1990 0.533 0.000 1991 0.590 0.000 1992 0.332 0.000 1993 0.243 0.000 1994 0.270 0.000 1995 0.392 0.000 1996 0.398 0.000 1997 0.320 0.000 1998 0.449 0.000 1999 0.385 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5397 0.0000 2 0.5395 0.0000 3 0.5326 0.0000 4 0.4834 0.0000 5 0.4554 0.0000 6 0.4515 0.0000 7 0.9503 0.0000 8 0.4488 0.0000 9 0.4169 0.0000 10 0.4075 0.0000 11 0.3986 0.0000 12 0.3976 0.0000 13 0.3917 0.0000 14 0.3914 0.0000 15 0.3907 0.0000 16 0.3866 0.0000 17 0.3855 0.0000 18 0.3826 0.0000 19 0.3797 0.0000 20 0.3622 0.0000 21 0.3567 0.0000 22 0.3559 0.0000 23 0.3415 0.0000 24 0.3411 0.0000 25 0.3366 0.0000 26 0.3343 0.0000 27 0.3322 0.0000 28 0.3236 0.0000 29 0.3203 0.0000 30 0.3101 0.0000 31 0.3090 0.0000 32 0.3063 0.0000 33 0.2949 0.0000 34 0.2861 0.0000 35 0.2755 0.0000 36 0.2705 0.0000 37 0.2704 0.0000 38 0.2655 0.0000 39 0.2640 0.0000 40 0.2608 0.0000 41 0.2605 0.0000 92 0.2434 0.0000 43 0.2260 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.1770 1060 0 .0 Pass 0.1810 974 0 .0 Pass 0.1851 906 0 .0 Pass 0.1892 836 0 .0 Pass 0.1932 785 0 .0 Pass 0.1973 717 0 .0 Pass 0.2013 669 0 .0 Pass 0.2054 624 0 .0 Pass 0.2094 584 0 .0 Pass 0.2135 538 0 .0 Pass 0.2175 503 0 .0 Pass 0.2216 461 0 .0 Pass 0.2256 435 0 .0 Pass 0.2297 399 0 .0 Pass 0.2337 365 0 .0 Pass 0.2378 342 0 .0 Pass 0.2418 315 0 .0 Pass 0.2459 297 0 .0 Pass 0.2499 278 0 .0 Pass 0.2540 256 0 .0 Pass 0.2580 238 0 .0 Pass 0.2621 221 0 .0 Pass 0.2661 200 0 .0 Pass 0.2702 189 0 .0 Pass 0.2792 172 0 .0 Pass 0.2783 167 0 .0 Pass 0.2823 161 0 .0 Pass 0.2864 155 0 .0 Pass 0.2909 147 0 .0 Pass 0.2945 142 0 .0 Pass 0.2985 138 0 .0 Pass 0.3026 137 0 .0 Pass 0.3066 126 0 .0 Pass 0.3107 117 0 .0 Pass 0.3147 109 0 .0 Pass 0.3188 109 0 .0 Pass 0.3228 98 0 .0 Pass 0.3269 91 0 .0 Pass 0.3309 87 0 .0 Pass 0.3350 80 0 .0 Pass 0.3391 74 0 .0 Pass 0.3431 67 0 .0 Pass 0.3472 66 0 .0 Pass 0.3512 60 0 .0 Pass 0.3553 58 0 .0 Pass 0.3593 54 0 .0 Pass 0.3634 50 0 .0 Pass 0.3674 46 0 .0 Pass 0.3715 46 0 .0 Pass 0.3755 41 0 .0 Pass 0.3796 38 0 .0 Pass 0.3836 36 0 .0 Pass 0.3877 34 0 .0 Pass 0.3917 29 0 .0 Pass 0.3958 26 0 .0 Pass 0.3998 23 0 .0 Pass 0.4039 23 0 .0 Pass 0.4079 20 0 .0 Pass 0.4120 19 0 .0 Pass 0.4160 18 0 .0 Pass 0.4201 16 0 .0 Pass 0.4241 16 0 .0 Pass 0.9282 16 0 .0 Pass 0.4322 15 0 .0 Pass 0.4363 14 0 .0 Pass 0.4903 12 0 .0 Pass 0.4444 12 0 .0 Pass 0.4484 12 0 .0 Pass 0.4525 9 0 .0 Pass 0.4565 8 0 .0 Pass 0.4606 8 0 .0 Pass 0.4646 8 0 .0 Pass 0.4687 8 0 .0 Pass 0.4727 8 0 .0 Pass 0.4768 6 0 .0 Pass 0.9809 6 0 .0 Pass 0.4849 5 0 .0 Pass 0.4890 5 0 .0 Pass 0.9930 5 0 .0 Pass 0.4971 5 0 .0 Pass 0.5011 5 0 .0 Pass 0.5052 5 0 .0 Pass 0.5092 5 0 .0 Pass 0.5133 5 0 .0 Pass 0.5173 5 0 .0 Pass 0.5214 5 0 .0 Pass 0.5259 5 0 .0 Pass 0.5295 5 0 .0 Pass 0.5335 9 0 .0 Pass 0.5376 4 0 .0 Pass 0.5416 1 0 .0 Pass 0.5457 1 0 .0 Pass 0.5497 1 0 .0 Pass 0.5538 1 0 .0 Pass 0.5578 1 0 .0 Pass 0.5619 1 0 .0 Pass 0.5659 1 0 .0 Pass 0.5700 1 0 .0 Pass 0.5790 1 0 .0 Pass 0.5781 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.189 acre-feet On-line facility target flow: 0.19 cfs. Adjusted for 15 min: 0.22 c£s. Off-line facility target flow: 0.11 cfs. Adjusted for 15 min: 0.12 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology drsctaems all warrantees, either expressed or rmplied, including but not limited to emp]ied warranties of program and accompanying documentation. in no event shall AQUA 'PERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 10.0 ~xxxrxxxxxxxx~oogw~..ocva~xxkxxxkkxxxx `~ 10 ti ... fy ~gc,~cgeso~oooooooaoooa ~ ooGOOOo`~'~ o Predeveloped ~ 10E-1 x Developed Mitigated v ~_ O toE-,2 1 10 20 30 d0 50 60 70 BO 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart .I '~ U "~" 028 --_ ____ ~ . CA 018 -- -- ~ L U N Y1 o Predeveloped x Developed wig Facility 10E-5 ~ 10E•4 1t1E•3 10E•2 10E•1 1 10 Percent Exceeding Duration [~ranh -- YF,Att ~ fIOW {tts) 1D0' 1138 i ~~ ;~ ~~~ 3 . i ,iii 507701 ~ '~ ", ~i ii 3 i F i3, # ~ ii ~! ~~ 25 = 5 l)45 t ~ ~ i ~ ~ i ji ~ s ~ > + .. ~ , 5 '1518 ~~~; 'i' 2 5459 ~ ~ i r 3 Yearly Peaks for Developed W/Pond Yearly Peaks for developed W/O Pond CLEARHIS BSN C1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C1 0 12 8 00 0 0407 0 50 SBUH/SCS TYPEIA 6 mo BSN C1 0 20 8 00 0 0689 0 50 SBUH/SCS TYPEIA 2 yr BSN C1 0 32 8 00 0 1091 0 50 SBUH/SCS TYPE1A 10 yr BSN C1 0 38 8 00 0 1294 0 50 SBUH/SCS TYPEIA 25 yr BSN C1 0 40 8 00 0 1396 0 50 SBUH/SCS TYPEIA 50 yr BSN C1 0 43 8 00 0 1498 0 50 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN C1 Hyd Method: SBUH Hyd Loss Method. SCS CN Number Peak Factor. 484.00 SCS Abs 0 20 Storm Dur• 24 00 hrs Inty. 10.00 mm Area CN TC Pervious 0.0491 ac 78 00 0 03 hrs Impervious 0 4528 ac 98.00 0.10 hrs Total 0.5019 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0 0491 ac Impervious CN Data: ROADWAY 98.00 0.3095 ac SIDWALK 98.00 0 1204 ac DRIVEWAY 98 00 0 0229 ac Pervious TC Data: Flow type: Description Length: Slope• Coeff Travel Time Sheet Across Planter Strip 6.00 ft 2.00% 0.2400 1.90 min Impervious TC Data: Flow type: Description Length: Slope: Coeff• Travel Time Shallow Along Flow Line of Gutter 272.00 ft 0.50% 27.0000 3.15 mm Sheet Across Roadway 27 00 ft 2 00% 0 0110 0.54 min Channel Through Strom Water Pipe 150 00 ft 0.50% 21.0000 1 68 min Sheet Across Sidewalks 12 00 ft 2.00% 0.0110 0.28 mm Sheet Across Driveway 20.00 ft 2.00% 0 0110 0.42 min BSN C2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C2 0 11 8 00 0 0365 0 50 SBUH/SCS TYPE1A 6 mo BSN C2 0 18 8 00 0 0628 0 50 SBUH/SCS TYPE1A 2 yr BSN C2 0 29 8 00 0 1011 0 50 SBUH/SCS TYPEIA 10 yr BSN C2 0 35 8 00 0 1207 0 50 SBUH/SCS TYPEIA 25 yr BSN C2 0 38 8 00 0 1306 0 50 SBUH/SCS TYPEIA 50 yr BSN C2 0 40 8 00 0 1405 0 50 SBUH/SCS TYPE1A 100 yr Drainage A rea: BSN C2 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor. 484 00 SCS A bs. 0 20 Storm Dur. 24.00 hrs Intv: 10 00 min Area CN Pervious 0 0997 ac 78.00 Impervious 0 3977 ac 98.00 Total 0.4974 ac Supporting Data: Pervious CN Data: Type B Sods 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type: Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN C3 Event Summary: BasinlD Peak O Peak T Event ------- (cfs) (hrs) BSN C3 0 07 7 83 BSN C3 0 12 7 83 BSN C3 0 20 7 83 BSN C3 0 24 7 83 BSN C3 0 26 7 83 BSN C3 0 28 7 83 yr Drainage Area: BSN C3 Hyd Method: SBUH Hyd Peak Factor: 484.00 Storm Dur: 24 00 hrs Area CN Pervious 0.0891 ac 78.00 Impervious 0 2621 ac 98 00 Total 0.3512 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: DRIVEWAY 98.00 SIDWALK 98.00 ROADWAY 98 00 Pervious TC Data: Flow type. Description. Sheet Across Planter Strip Impervious TC Data: Flow type: Description: TC 0.03 hrs 0.10 hrs 0.0997 ac 0 2486 ac 0 0343 ac 0.1148 ac Length• Slope Coeff' Travel Time 6.00 ft 2.00% 0.2400 1.90 min Length• Slope. Coeff: Travel Time 292.00 ft 0.50% 27 0000 3 39 min 18.50 ft 2.00% 0 0110 0 40 min 150 00 ft 0 50% 21 0000 1.68 min 5.00 ft 2.00% 0 0110 0 14 min 20.00 ft 2.00% 0.0110 0.42 min Peak Vol Area (ac-ft) ac 0 0243 0 35 0 0424 0 35 0 0689 0 35 0 0825 0 35 0 0894 0 35 0 0963 0 35 Method Raintype /Loss SBUH/SCS TYPEIA 6 mo SBUHlSCS TYPE1A 2 yr SBUH/SCS TYPEIA 10 yr SBUH/SCS TYPEIA 25 yr SBUH/SCS TYPE1A 50 yr SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs. 0 20 Intv: 10.00 min TC 0 03 hrs 0.06 hrs 0.0891 ac 0.0688 ac 0 0275 ac 0.1658 ac Length. Slope: Coeff. Travel Time 6 00 ft 2 00% 0 2400 1.90 min Length Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 217.00 ft 1.27% 27 0000 1.19 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0 40 min Channel Through Strom Water Pipe 180 00 ft 0 50% 21.0000 2 02 min Sheet Across Sidewalks 5 00 ft 2.00% 0.0110 0 14 min ADDHYD [BSN C1] AS [6 mo) [BSN C2] AS [6 mo] TO (BSN C1 +BSN C2] Peak Flow 0.2269 cfs Peak Time 8 00 hrs Hyd Vol 3362.93 cf - 0 0772 acft ADDHYD [BSN C1] AS [2 yr] [BSN C2] AS [2 yr] TO [BSN C1 +BSN C2) Peak Flow: 0 3842 cfs Peak Time: 8 00 hrs Hyd Vol 5739.11 cf - 0.1318 acft ADDHYD [BSN C1] AS [10 yr] [BSN C2] AS [10 yr] TO [BSN C1 +BSN C2] Peak Flow. 0.6091 cfs Peak Time. 8 00 hrs Hyd Vol 9155 95 cf - 0 2102 acft ADDHYD [BSN C1] AS [25 yr] [BSN C2] AS [25 yr] TO [BSN C1 +BSN C2] Peak Flow: 0.7229 cfs Peak Time 8 00 hrs Hyd Vol. 10893 56 cf - 0.2501 acft ADDHYD [BSN C1] AS [50 yr] [BSN C2] AS [50 yr] TO [BSN C1 +BSN C2] Peak Flow: 0 7800 cfs Peak Time 8 00 hrs Hyd Vol 11766.94 cf - 0.2701 acft ADDHYD [BSN C1] AS [100 yr] [BSN C2] AS [100 yr] TO [BSN C1 +BSN C2) Peak Flow 0.8373 cfs Peak Time 8 00 hrs Hyd Vol- 12643 01 cf - 0.2902 acft ADDHYD [BSN C1 +BSN C2] AS [6 mo] [BSN C3] AS [6 mo] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow 0 2969 cfs Peak Time 8 00 hrs Hyd Vol 4421 34 cf - 0 1015 acft ADDHYD [BSN C1 +BSN C2] AS [2 yr] [BSN C3] AS [2 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 0 5042 cfs Peak Time: 8 00 hrs Hyd Vol 7588.15 cf - 0.1742 acft ADDHYD [BSN C1 +BSN C2] AS [10 yr] [BSN C3] AS [10 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow 0 8091 cfs Peak Time 8 00 hrs Hyd Vol: 12157.59 cf - 0 2791 acft ADDHYD [BSN C1 +BSN C2) AS [25 yr] [BSN C3] AS [25 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 1 0200 cfs Peak Time. 8.00 hrs Hyd Vof 14488 05 cf - 0 3326 acft ADDHYD [BSN C1 +BSN C2] AS [50 yr] [BSN C3] AS [50 yr] TO [BSN C1 +BSN C2 +BSN C3) Peak Flow: 1.0400 cfs Peak Time 8 00 hrs Hyd Vol 15659 82 cf - 0.3595 acft ADDHYD [BSN C1 +BSN C2] AS [100 yr] [BSN C3] AS [100 yr] TO [BSN C1 +BSN C2 + BSN C3] Peak Flow: 1.1130 cfs Peak Time 8.00 hrs Hyd Vol: 16836.30 cf - 0 3865 acft Hydrograph ID: BASIN C Area 1.3505 ac Hyd Int. 10 00 min Base Flow: Peak Flow: 1.1130 cfs Peak Time 8 00 hrs Hyd Vol: 0.3865 acft Time Flow Time Ftow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 4696 16 50 0 1554 0 83 0 0135 8 83 0 4008 16 67 0 1554 1 00 0 0257 9 00 0 4009 16 83 0 1555 1 17 0 0395 9 17 0 3494 17 00 0 1555 1 33 0 0528 9 33 0 3019 17 17 0 1503 1 50 0 0620 9 50 0 3025 17 33 0 1453 1 67 0 0722 9 67 0 2863 17 50 0 1455 1 83 0 0816 9 83 0 2724 17 67 0 1453 2 00 0 0876 10 00 0 2727 17 83 0 1454 2 17 0 0958 10 17 0 2573 18 00 0 1455 2.33 0 1035 10 33 0 2430 18 17 0 1402 2 50 0 1077 10 50 0 2434 18 33 0 1352 2 67 0 1112 10 67 0 2329 18 50 0 1353 2 83 0.1142 10 83 0 2234 18 67 0 1352 3 00 0 1168 11 00 0 2237 18 83 0 1353 3 17 0 1191 11 17 0 2184 19 00 0 1353 3 33 0 1210 11 33 0 2138 19 17 0 1300 3 50 0 1228 11 50 0 2140 19 33 0 1250 3 67 0 1281 11 67 0 2088 19.50 0 1251 3 83 0 1335 11 83 0 2041 19 67 0.1250 4 00 0 1350 12 00 0 2043 19 83 0.1251 4 17 0 1441 12 17 0 1991 20 00 0.1251 4 33 0 1533 12 33 0 1943 20 17 0 1251 4 50 0 1549 12 50 0 1945 20 33 0 1252 4 67 0 1640 12 67 0 1892 20 50 0.1252 4 83 0 1736 12 83 0 1845 20 67 0 1252 5 00 0.1758 13 00 0 1846 20 83 0 1253 517 01859 1317 01846 2100 01253 5 33 0 1961 13 33 0 1848 21 17 0 1253 5 50 0 1981 13 50 0 1848 21 33 0 1254 5 67 0 2084 13 67 0 1797 21 50 0 1254 5 83 0 2187 13 83 0 1748 21 67 0 1254 6 00 0 2207 14 00 0 1750 21 83 0 1254 6 17 0 2399 14 17 0 1749 22 00 0 1255 6 33 0 2593 14 33 0 1751 22 17 0 1201 6 50 0 2616 14 50 0 1751 22 33 0 1151 6 67 0 2907 14 67 0 1700 22 50 0 1152 6 83 0 3196 14 83 0 1651 22 67 0 1151 7 00 0.3224 15 00 0 1652 22 83 0 1152 7 17 0 3573 15 17 0 1651 23 00 0.1151 7 33 0 3915 15 33 0 1653 23 17 0 1152 7 50 0 3947 15 50 0 1653 23 33 0 1152 7 67 0.7459 15 67 0 1601 23 50 0 1152 7 83 1 0957 15 83 0.1552 23 67 0 1152 8 00 1 1130 16.00 0 1553 23 83 0 1153 8 17 0 8325 16 17 0 1552 24 00 0 1153 8 33 0 5486 16 33 0 1553 24 17 0 0558 8 50 0 5512 16 50 0 1554 24 33 0 0039 Hydrograp h ID: BASIN C Area: 1 3505 ac Hyd Int. 10 00 min Base Flow: Peak Flow: 1.1130 cfs Peak Time. 8 00 hrs Hyd Vol: 0 3865 acft MOVEHYD [BASIN C] TO [BASIN C - 6 mo] AS [6 mo] Peak Flow 0.2969 cfs Peak Time 8 00 hrs Hyd Vol 4421.34 cf - 0.1015 acft MOVEHYD [BASIN C] TO [BASIN C - 100 yr] AS [100 yr] Peak Flow: 1.1130 cfs Peak Time 8.00 hrs Hyd Vol 16836.30 cf - 0.3865 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip: Multiple Orifice Start EI Max EI Increment 326.0000 ft 332.2000 ft 0.10 Infil: 10.00 in/hr Multiplier 1.00 Reach ID: BIOSWALE C Section Properties: Shape: Ditch Routing Method Travel Time Translation Size Material Manning n Hyd params By Corr Metal -normal 0 0250 Manning Formula Length Slope Entrance Loss 200 0000 ft 1.00 Width Bank Hgt ss1 ss2 10 0000 ft 3 0000 ft 3 OOh.1v 3 OOh:1v Up Node Dn Node Up Invert Dn Invert DUMMY C 0 0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1.0000 ft 3.0000 ft 0 5000 ft 2 0000 ft 0 0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 0000 ac 0.0000 cf O.000Ocf 0.0000 ft/s 0.0000 ft Ent Loss Exit Loss Frict Loss Start TW 0.000000 ft 0.000000 ft 0.000000 ft 0 0000 ft ROUTEHYD [BASIN C - 6 mo] THRU [BIOSWALE C] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ftls ---------- BIOSWALE C 1 3505 0 2969 ---- 1 00 0 1004 Ditch 0 6194 ----- BASIN C ROUTEHYD [BASIN C - 100 yr] THRU [BIOSWALE C] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin I Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s ---------- BIOSWALE C 1 3505 1 1130 ---- 1 00 0 2164 Ditch 0 9956 ----- BASIN C Node ID: INFILTRATION C Desc: Manhole structure Start EI: 332 2000 ft Max EI 333.2000 ft Contnb Basin: Contnb Hyd Length Width Void Ratio 200.0000 ft 10.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN C RLP Desc Manhole structure Start EI~ 332.2000 ft Max EI: 333 2000 ft Contrib Basin: Contrib Hyd Storage Id' INFILTRATION C Discharge Id: INFILTRATION RLPCOMPUTE [BASIN C RLP] SUMMARY 100 yr MatchQ=PeakQ= 1.1130 cfs Peak Out Q: 0.3704 cfs -Peak Stg: 333 40 ft - Active Vol. 1870 37 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT s Project Name: Tahoma Terra_BASIN -C Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin C Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 DEVELOPED LAND USE Basin Basin C Flows To Bio-Infiltration Swale C Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.91 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale C Pond Type: Trapezoidal Pond Pond Flows to Point of Compllance Pond Rain / Evap is not activated. Da.mensions Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: 0.027 acre-ft. Discharge Structure Riser Height: 0.5 ft. Riser Diameter: 54 ln. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 331.7 0.046 0.000 0.000 0.000 331.8 0.048 0.004 0.000 0.463 331.9 0.050 0.007 0.000 0.463 331.9 0.053 0.012 0.000 0.963 332.0 0.055 0.016 0.000 0.463 ~' ~, ~J~' ~ F<%/SIFRt" ,~ ~ ,~y JOIVAt,k~`~~~4 JF' ~-$-Q*~' 09-22--0 EXPiRES• ! 1-2? 332.1 0.057 0.020 0.000 0.463 332.2 0.060 0.025 0.000 0.963 332.2 0.062 0.029 0.411 0.963 332.3 0.064 0.034 1.873 0.463 332.4 0.067 0.039 3.920 0.463 332.5 0.069 0.045 6.416 0.463 332.6 0.071 0.050 9.292 0.463 332.6 0.074 0.056 12.50 0.963 332.7 0.076 0.061 16.01 0.463 332.8 0.078 0.067 19.81 0.463 332.9 0.081 0.074 23.86 0.463 332.9 0.083 0.080 28.15 0.963 333.0 0.086 0.087 32.67 0.463 333.1 0.088 0.093 37.42 0.463 333.2 0.090 0.100 42.37 0.463 333.3 0.093 0.107 47.53 0.463 333.3 0.095 0.115 52.88 0.963 333.4 0.098 0.122 58.41 0.463 333.5 0.100 0.130 64.13 0.463 333.6 0.103 0.138 70.02 0.463 333.6 0.105 0.146 76.08 0.963 333.7 0.108 0.159 82.31 0.463 333.8 0.110 0.163 88.70 0.463 333.9 0.113 0.171 95.29 0.963 334.0 0.115 0.180 101.9 0.463 334.0 0.118 0.189 108.8 0.463 334.1 0.120 0.199 115.8 0.463 339.2 0.123 0.208 122.9 0.963 334.3 0.126 0.218 130.2 0.463 334.3 0.128 0.228 137.6 0.463 339.4 0.131 0.238 145.2 0.463 334.5 0.133 0.248 152.9 0.463 339.6 0.136 0.258 160.7 0.963 339.7 0.139 0.269 168.6 0.463 334.7 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.353994 5 year 0.931074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(cfs) 2 year 0.353994 5 year 0.431079 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.54587 5 year 1.518176 10 year 2.680528 25 year 5.044867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.334 0.000 1957 0.540 0.000 1958 0.310 0.000 1959 0.362 0.000 1960 0.399 0.000 1961 0.265 0.000 1962 0.286 0.000 1963 0.575 0.000 1964 0.417 0.000 1965 0.391 0.000 1966 0.275 0.000 1967 0.337 0.000 1968 0.269 0.000 1969 0.261 0.000 1970 0.260 0.000 1971 0.324 0.000 1972 0.387 0.000 1973 0.306 0.000 1974 0.357 0.000 1975 0.309 0.000 1976 0.356 0.000 1977 0.450 0.000 1978 0.383 0.000 1979 0.455 0.000 1980 0.342 0.000 1981 0.391 0.000 1982 0.452 0.000 1983 0.483 0.000 1984 0.295 0.000 1985 0.341 0.000 1986 0.380 0.000 1987 0.407 0.000 1988 0.226 0.000 1989 0.270 0.000 1990 0.533 0.000 1991 0.540 0.000 1992 0.332 0.000 1993 0.243 0.000 1994 0.270 0.000 1995 0.392 0.000 1996 0.398 0.000 1997 0.320 0.000 1998 0.499 0.000 1999 0.385 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5397 0.0000 2 0.5395 0.0000 3 0.5326 0.0000 4 0.4834 0.0000 5 0.4554 0.0000 6 0.4515 0.0000 7 0.4503 0.0000 8 0.4488 0.0000 9 0.9169 0.0000 10 0.4075 0.0000 11 0.3986 0.0000 12 0.3976 0.0000 13 0.3917 0.0000 19 0.3914 0.0000 15 0.3907 0.0000 16 0.3866 0.0000 17 0.3855 0.0000 18 0.3826 0.0000 19 0.3797 0.0000 20 0.3622 0.0000 21 0.3567 0.0000 22 0.3559 0.0000 23 0.3415 0.0000 24 0.3411 0.0000 25 0.3366 0.0000 26 0.3393 0.0000 27 0.3322 0.0000 28 0.3236 0.0000 29 0.3203 0.0000 30 0.3101 0.0000 31 0.3090 0.0000 32 0.3063 0.0000 33 0.2949 0.0000 34 0.2861 0.0000 35 0.2755 0.0000 36 0.2705 0.0000 37 0.2704 0.0000 38 0.2655 0.0000 39 0.2640 0.0000 40 0.2608 0.0000 41 0.2605 0.0000 42 0.2434 0.0000 43 0.2260 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Percentage Pass/Fail 0.]770 1060 0 .0 Pass 0.1810 974 0 .0 Pass 0.1851 906 0 .0 Pass 0.1892 836 0 .0 Pass 0.1932 785 0 .0 Pass 0.1973 717 0 .0 Pass 0.2013 669 0 .0 Pass 0.2054 624 0 .0 Pass 0.2094 584 0 .0 Pass 0.2135 538 0 .0 Pass 0.2175 503 0 .0 Pass 0.2216 461 0 .0 Pass 0.2256 435 0 .0 Pass 0.2297 399 0 .0 Pass 0.2337 365 0 .0 Pass 0.2378 342 0 .0 Pass 0.2418 315 0 .0 Pass 0.2459 297 0 .0 Pass 0.2499 278 0 .0 Pass 0.2540 256 0 .0 Pass 0.2580 238 0 .0 Pass 0.2621 221 0 .0 Pass 0.2661 200 0 .0 Pass 0.2702 189 0 .0 Pass 0.2742 172 0 .0 Pass 0.2783 167 0 .0 Pass 0.2823 161 0 .0 Pass 0.2864 155 0 .0 Pass 0.2904 147 0 .0 Pass 0.2995 142 0 .0 Pass 0.2985 138 0 .0 Pass 0.3026 137 0 .0 Pass 0.3066 126 0 .0 Pass 0.3107 117 0 .0 Pass 0.3147 109 0 .0 Pass 0.3188 109 0 .0 Pass 0.3228 98 0 .0 Pass 0.3269 91 0 .0 Pass 0.3309 87 0 .0 Pass 0.3350 80 0 .0 Pass 0.3391 74 0 .0 Pass 0.3431 67 0 .0 Pass 0.3472 66 0 .0 Pass 0.3512 60 0 .0 Pass 0.3553 58 0 .0 Pass 0.3593 54 0 .0 Pass 0.3634 50 0 .0 Pass 0.3679 46 0 .0 Pass 0.3715 46 0 .0 Pass 0.3755 41 0 .0 Pass 0.3796 38 0 .0 Pass 0.3836 36 0 .0 Pass 0.3877 34 0 .0 Pass 0.3917 29 0 .0 Pass 0.3958 26 0 .0 Pass 0.3998 23 0 .0 Pass 0.9039 23 0 .0 Pass 0.9079 20 0 .0 Pass 0.9120 19 0 .0 Pass 0.4160 18 0 .0 Pass 0.9201 16 0 .0 Pass 0.4241 16 0 .0 Pass 0.4282 16 0 .0 Pass 0.9322 15 0 .0 Pass 0.4363 14 0 .0 Pass 0.4403 12 0 .0 Pass 0.4449 12 0 .0 Pass 0.4484 12 0 .0 Pass 0.9525 9 0 .0 Pass 0.4565 8 0 .0 Pass 0.9606 8 0 .0 Pass 0.4646 8 0 .0 Pass 0.4687 8 0 .0 Pass 0.4727 8 0 .0 Pass 0.4768 6 0 .0 Pass 0.4809 6 0 .0 Pass 0.9849 5 0 .0 Pass 0.9890 5 0 .0 Pass 0.4930 5 0 .0 Pass 0.4971 5 0 .0 Pass 0.5011 5 0 .0 Pass 0.5052 5 0 .0 Pass 0.5092 5 0 .0 Pass 0.5133 5 0 .0 Pass 0.5173 5 0 .0 Pass 0.5219 5 0 .0 Pass 0.5254 5 0 .0 Pass 0.5295 5 0 .0 Pass 0.5335 4 0 .0 Pass 0.5376 4 0 .0 Pass 0.5416 1 0 .0 Pass 0.5457 1 0 .0 Pass 0.5497 1 0 .0 Pass 0.5538 1 0 .0 Pass 0.5578 1 0 .0 Pass 0.5619 1 0 .0 Pass 0.5659 1 0 .0 Pass 0.5700 1 0 .0 Pass 0.5790 1 0 .0 Pass 0.5781 0 0 .0 Pass Water Quality HMP Flow and Volume. On-line facility volume: 0.189 acre-feet On-line facility target flow: 0.19 cfs. Adjusted for 15 min: 0.22 cfs. Off-line facility target flow: 0.11 cfs Adjusted for 15 min: 0.12 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kand. The entire risk regarding the performance and results of this program is assumed by the user AQUA TERRA Consultants and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibLlity of such damages. 1Q0 kkkr}~kkkkkk?4~OP04~.G??{~4~4ppckkkkkkk7rkkk}~ +,... '~ 1.0 ...~ 41 aobono4ooa ~ Qooaa o Predeveloped ~ 111E-1 x Developed Mitigated .t v O 10E-2 1 10 20 ZO 40 50 60 70 60 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart TEpR ~ FIOW (d's) 100 6185 --- ~ ; ~ , ~ o Predeveloped 50 ' 5781 ' ~ f ? ~ i ; x Daweloped w~h Facility 25 5365 ° , i ' 3 ~ 048 - ~. ~ ~ .. ~ _ . . 10 ,4769 ~ 0 38 - - - 5 i 4311 ~ ~ ~ ' -___ -__ ___ _ - .. _._~ _.., :~~ ~ `~ ~~ '~ o2a _ _ ~ i ~3' ~~ ~ 0.18 , ~~ ~ ~ n , „ " 90E-5 ~ 10E•4 10E•3 10E-2 10E•1 1 10 Percent ~xceedin Yearly Peaks for developed W/O Pond Duration Graph 1:11 38 ` ~ ~ ?, ~~' it~ E 50 1701 - ~', _3 ~ , ~ ; ' 1. ~ ~ z ~ , ~ , i' ,~ 25 ~ 5045 .._ _ ..,,r,,, ~ 3 ' ~ ~ ~ , ~ ~' i ~ t " , f ~ ` t ? it ~~ 10 2.081 .._.~ ~ ~. . _ ~ ~ ~ +5 > 1 S~yipb E ' ~ , ~ G ~ 5459 it ~~F j, ~ i Sid ..... dearly Peaks for Developed WlPond CLEARHIS BSN C1 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN C1 0 12 8 00 BSN C1 0 20 8 00 BSN C1 0 32 8 00 BSN C1 0 38 8 00 BSN C1 0 40 8 00 BSN C1 0.43 8 00 yr Drainage Area: BSN C1 Hyd Method• SBUH Hyd Peak Factor: 484 00 Storm Dur 24 00 hrs Area CN Pervious 0.0491 ac 78.00 Impervious 0.4528 ac 98 00 Total 0.5019 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 Impervious CN Data: ROADWAY 98 00 SIDWALK 98.00 DRIVEWAY 98.00 Pervious TC Data: Flow type Description Sheet Across Planter Strip Impervious TC Data: Flow type. Description: Shallow Along Flow Line of Gutter Sheet Across Roadway Channel Through Strom Water Pipe Sheet Across Sidewalks Sheet Across Driveway BSN C2 Event Summary: BasinlD Peak Q Peak T Event ------- (cfs) (hrs) BSN C2 0 11 8 00 BSN C2 0 18 8 00 BSN C2 0 29 8 00 BSN C2 0 35 8.00 BSN C2 0 38 8 00 BSN C2 0 40 8 00 yr Drainage Area: BSN C2 Hyd Method• SBUH Hyd Peak Factor 484.00 Storm Dur. 24 00 hrs Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0407 0 50 SBUH/SCS TYPEIA 6 mo 0 0689 0 50 SBUH/SCS TYPE1A 2 yr 0 1091 0 50 SBUH/SCS TYPEIA 10 yr 0 1294 0 50 SBUHlSCS TYPEIA 25 yr 0 1396 0 50 SBUHlSCS TYPEIA 50 yr 0 1498 0 50 SBUH/SCS TYPEIA 100 Loss Method SCS Abs. Intv: TC 0 03 hrs 0 10 hrs SCS CN Number 0 20 10.00 m m 0 0491 ac 0.3095 ac 0 1204 ac 0.0229 ac Length: Slope: Coeff• Travel Time 6.00 ft 2 00% 0.2400 1.90 min Length: Slope: Coeff Travel Time 272 00 ft 0.50% 27.0000 3.15 min 27 00 ft 2 00% 0 0110 0.54 min 150 00 ft 0.50% 21 0000 1 68 min 12 00 ft 2.00% 0.0110 0.28 min 20 00 ft 2.00% 0 0110 0.42 min Peak Vol Area Method Raintype (ac-ft) ac /Loss 0 0365 0 50 SBUH/SCS TYPEIA 6 mo 0 0628 0 50 SBUH/SCS TYPEIA 2 yr 0 1011 0 50 SBUH/SCS TYPE1A 10 yr 0.1207 0 50 SBUH/SCS TYPE1A 25 yr 0 1306 0 50 SBUH/SCS TYPE1A 50 yr 0 1405 0 50 SBUH/SCS TYPE1A 100 Loss Method• SCS CN Number SCS Abs 0.20 Intv. 10 00 min Area CN TC Pervious 0 0997 ac 78.00 0.03 hrs Impervious 0.3977 ac 98.00 0.10 hrs Total 0.4974 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0997 ac Impervious CN Data: ROADWAY 98.00 0 2486 ac SIDWALK 98.00 0 0343 ac DRIVEWAY 98.00 0 1148 ac Pervious TC Data: Flow type: Description Length• Slope. Coeff: Travel Time Sheet Across Planter Strip 6 00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description• Length Slope: Coeff• Travel Time Shallow Along Flow Line of Gutter 292 00 ft 0 50% 27.0000 3.39 mm Sheet Across Roadway 18.50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe 150.00 ft 0.50% 21 0000 1.68 min Sheet Across Sidewalks 5 00 ft 2 00% 0 0110 0 14 min Sheet Across Driveway 20 00 ft 2.00% 0 0110 0.42 min BSN C3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Ra~ntype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C3 0 07 7 83 0 0243 0 35 SBUH/SCS TYPE1A 6 mo BSN C3 0.12 7 83 0 0424 0 35 SBUH/SCS TYPEIA 2 yr BSN C3 0 20 7 83 0 0689 0 35 SBUH/SCS TYPE1A 10 yr BSN C3 0 24 7 83 0 0825 0 35 SBUH/SCS TYPEIA 25 yr BSN C3 0 26 7 83 0 0894 0 35 SBUH/SCS TYPEIA 50 yr BSN C3 0 28 7 83 0 0963 0 35 SBUH/SCS TYPEIA 100 yr Drainage Area: BSN C3 Hyd Method: SBUH Hyd Loss Method. SC S CN Number Peak Factor: 484.00 SCS Abs: 0.2 0 Storm Dur: 24.00 hrs Intv• 10 00 min Area CN TC Pervious 0.0891 ac 78.00 0.03 hrs Impervious 0.2621 ac 98.00 0.06 hrs Total 0.3512 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0891 ac Impervious CN Data: DRIVEWAY 98.00 0.0688 ac SIDWALK 98 00 0.0275 ac ROADWAY 98 00 0 1658 ac Pervious TC Data: Flow type. Description• Length. Slope. Coeff. Travel Ti me Sheet Across Planter Strip 6.00 ft 2 00% 0 2400 1.90 min Impervious TC Data: Flow type Description Length. Slope Coeff: Travel Ti me Shallow Along Flow Line of Gutter 217 00 ft 1.27% 27.0000 1.19 min Sheet Across Roadway 18 50 ft 2.00% 0 0110 0 40 min Channel Through Strom Water Pipe 180 00 ft 0 50% 21 0000 2 02 mm Sheet Across Sidewalks 5 00 ft 2 00% 0 0110 0 14 mm ADDHYD [BSN C1] AS [6 mo] [BSN C2) AS (6 mo] TO [BSN C1 +BSN C2] Peak Flow 0 2269 cfs Peak Time• 8 00 hrs Hyd Vol 3362.93 cf - 0 0772 acft ADDHYD [BSN C1] AS [2 yr] (BSN C2) AS [2 yr] TO [BSN C1 +BSN C2] Peak Flow• 0 3842 cfs Peak Time• 8 00 hrs Hyd Vol 5739.11 cf - 0 1318 acft ADDHYD [BSN C1] AS [10 yr] [BSN C2] AS [10 yr] TO [BSN C1 +BSN C2] Peak Flow• 0.6091 cfs Peak Time 8 00 hrs Hyd Vol 9155.95 cf - 0 2102 acft ADDHYD [BSN C1] AS (25 yr] [BSN C2) AS [25 yr] TO [BSN C1 +BSN C2) Peak Flow• 0.7229 cfs Peak Time. 8 00 hrs Hyd Vol 10893.56 cf - 0 2501 acft ADDHYD [BSN C1] AS (50 yr) [BSN C2] AS [50 yr] TO [BSN C1 +BSN C2) Peak Flow. 0.7800 cfs Peak Time. 8.00 hrs Hyd Vol 11766.94 cf - 0 2701 acft ADDHYD [BSN C1] AS [100 yr) [BSN C2] AS [100 yr] TO [BSN C1 +BSN C2] Peak Flow: 0.8373 cfs Peak Time: 8.00 hrs Hyd Vol: 12643.01 cf - 0 2902 acft ADDHYD [BSN C1 +BSN C2] AS [6 mo] [BSN C3] AS [6 mo] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 0 2969 cfs Peak Time• 8 00 hrs Hyd Vol• 4421.34 cf - 0.1015 acft ADDHYD [BSN C1 +BSN C2] AS [2 yr] [BSN C3] AS [2 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow• 0.5042 cfs Peak Time: 8.00 hrs Hyd Vol 7588.15 cf - 0 1742 acft ADDHYD [BSN C1 +BSN C2] AS [10 yr] [BSN C3] AS [10 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 0 8091 cfs Peak Time 8 00 hrs Hyd Vol• 12157 59 cf - 0.2791 acft ADDHYD [BSN C1 +BSN C2] AS [25 yr] [BSN C3] AS [25 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow: 1 0200 cfs Peak Time: 8 00 hrs Hyd Vol: 14488.05 cf - 0.3326 acft ADDHYD [BSN C1 +BSN C2] AS [50 yr] [BSN C3) AS (50 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow 1.0400 cfs Peak Time: 8 00 hrs Hyd Vol. 15659 82 cf - 0.3595 acft ADDHYD [BSN C1 +BSN C2) AS [100 yr] [BSN C3] AS [100 yr] TO [BSN C1 +BSN C2 + BSN C3] Peak Flow: 1.1130 cfs Peak Time 8.00 hrs Hyd Vol• 16836 30 cf - 0 3865 acft Hydrograph ID: BASIN C Area• 1 3505 ac Hyd Int 10 00 min Base Flow• Peak Flow: 1.1130 cfs Peak Time: 8.00 hrs Hyd Vol 0 3865 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0.0034 8 67 0 4696 16 50 0 1554 0 83 0 0135 8 83 0 4008 16 67 0 1554 1 00 0 0257 9 00 0.4009 16 83 0 1555 1 17 0 0395 9 17 0 3494 17 00 0 1555 1 33 0 0528 9 33 0 3019 17 17 0 1503 1 50 0 0620 9 50 0 3025 17 33 0 1453 1 67 0 0722 9 67 0 2863 17 50 0 1455 1 83 0 0816 9 83 0 2724 17 67 0 1453 2 00 0 0876 10 00 0 2727 17 83 0 1454 2 17 0 0958 10 17 0 2573 18 00 0 1455 2 33 0 1035 10 33 0 2430 18 17 0 1402 2 50 0 1077 10 50 0 2434 18 33 0 1352 2 67 0 1112 10 67 0 2329 18 50 0.1353 2 83 0 1142 10 83 0 2234 18 67 0 1352 3 00 0 1168 11 00 0 2237 18 83 0 1353 3 17 0.1191 11 17 0 2184 19 00 0 1353 3 33 0 1210 11 33 0 2138 19 17 0 1300 3 50 0.1228 11 50 0 2140 19 33 0 1250 3 67 0 1281 11 67 0 2088 19 50 0 1251 3 83 0 1335 11 83 0 2041 19 67 0 1250 4 00 0 1350 12 00 0 2043 19 83 0 1251 4 17 0 1441 12 17 0 1991 20 00 0 1251 4 33 0 1533 12 33 0 1943 20 17 0 1251 4 50 0.1549 12 50 0 1945 20 33 0 1252 4 67 0 1640 12 67 0 1892 20 50 0 1252 4 83 0 1736 12 83 0 1845 20 67 0 1252 5 00 0 1758 13 00 0 1846 20 83 0 1253 517 01859 1317 01846 2100 01253 5 33 0 1961 13 33 0 1848 21 17 0 1253 5 50 0 1981 13 50 0 1848 21 33 0 1254 5 67 0 2084 13 67 0 1797 21 50 0 1254 5 83 0 2187 13 83 0 1748 21 67 0 1254 6 00 0 2207 14 00 0 1750 21 83 0 1254 6 17 0 2399 14 17 0 1749 22 00 0 1255 6.33 0 2593 14 33 0 1751 22 17 0.1201 6 50 0 2616 14 50 0 1751 22 33 0 1151 6 67 0 2907 14 67 0 1700 22.50 0 1152 6 83 0 3196 14 83 0 1651 22 67 0 1151 7 00 0 3224 15 00 0 1652 22 83 0 1152 7 17 0 3573 15 17 0 1651 23 00 0 1151 7 33 0 3915 15 33 0 1653 23 17 0 1152 7 50 0 3947 15 50 0 1653 23 33 0 1152 7 67 0 7459 15 67 0 1601 23 50 0 1152 7 83 1 0957 15 83 0 1552 23 67 0 1152 8 00 1.1130 16 00 0 1553 23 83 0 1153 8 17 0 8325 16 17 0 1552 24 00 0 1153 8 33 0 5486 16 33 0 1553 24 17 0 0558 8 50 0 5512 16 50 0 1554 24 33 0 0039 Hydrograp h ID: BASIN C Area: 1.3505 ac Hyd Int 10.00 min Base Flow. Peak Flow. 1.1130 cfs Peak Time 8.00 hrs Hyd Vol• 0.3865 acft MOVEHYD [BASIN C] TO [BASIN C - 6 moj AS [6 mo] Peak Flow: 0 2969 cfs Peak Time: 8 00 hrs Hyd Vol 4421.34 cf - 0.1015 acft MOVEHYD [BASIN C] TO [BASIN C - 100 yr] AS [100 yr] Peak Flow: 1.1130 cfs Peak Time: 8 00 hrs Hyd Vol 16836.30 cf - 0 3865 acft Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 326.0000 ft 332 2000 ft 0 10 Infil: 10 00 in/hr Multiplier 1 00 Reach ID: BIOSWALE C Section Properties: Shape: Ditch Routing Method Travel Time Translation Size Material Manning n Hyd params By Corr Metal -normal 0.0250 Manning Formula Length Slope Entrance Loss 200 0000 ft 1.00 Width Bank Hgt ss1 ss2 10.0000 ft 3.0000 ft 3 OOh.1 v 3.OOh:1 v Up Node Dn Node Up Invert Dn Invert DUMMY C 0.0000 ft 0.0000 ft Conduit Cons traints: Min Vel Max Vel Min Cov Min Slope Max Slope Min drop 0.5000 ft 1 0000 ft 3.0000 ft 0.5000 ft 2.0000 ft 0.0000 ft In/Exfil Hold Up Hold Dn Match Inv Allow Smaller 10.0000 in/hr NO NO YES NO Conduit Summary: Tnb Area Flow Capacity Velocity Normal Depth 0.0000 ac 0.0000 cf 0 OOOOcf 0.0000 ft/s 0.0000 ft Ent Loss Exit Loss Frict Loss Start TW 0 000000 ft 0.000000 ft 0 000000 ft 0 0000 ft ROUTEHYD [BASIN C - 6 mo] THRU (BIOSWALE C] USING THUR100Y AND [6 mo] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE C 1 3505 0 2969 ---- 1 00 0 1004 Ditch 0.6194 ----- BASIN C ROUTEHYD [BASIN C - 100 yr] THRU [BIOSWALE C] USING THUR100Y AND [100 yr] ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- ft/s ft/s BIOSWALE C 1 3505 1 1130 ---- 1 00 0 2164 Ditch 0 9956 ----- BASIN C Node ID: INFILTRATION C Desc: Manhole structure Start EI~ 332 2000 ft Max EI. 333.2000 ft Contnb Basin Contrib Hyd Length Width Void Ratio 200 0000 ft 10.0000 ft 39 00 Bottom area only with infiltration Node ID: BASIN C RLP Desc Manhole structure Start EI~ 332 2000 ft Max EI: 333.2000 ft Contnb Basin: Contnb Hyd Storage Id INFILTRATION C Discharge Id. INFILTRATION RLPCOMPUTE (BASIN C RLP] SUMMARY 100 yr MatchO=PeakQ= 1 1130 cfs Peak Out O: 0.3704 cfs -Peak Stg. 333.40 ft - Active Vol 1870.37 cf WESTERN WASHINGTON HYDROLOGY MODEL V2 PROJECT REPORT c Project Name: Tahoma Terra_BASIN -C Site Address: Tahoma Terra, LLC City Yelm, Washington Report Date 9/22/2005 Gage Olympia Data Start 1955 Data End 1999 (adjusted) Precip Scale: 0.80 PREDEVELOPED LAND USE Basin Basin C Flows To Point of Compliance Groundwater: No Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 DEVELOPED LAND USE Basin Basin C Flows To Bio-Infiltration Swale C Groundwater: Yes Land Use Acres OUTWASH GRASS: 1.15 IMPERVIOUS: 1.41 RCHRES (POND) INFORMATION Pond Name: Bio-Infiltration Swale C Pond Type: Trapezoidal Pond Pond Flows to Point of Compliance Pond Rain / Evap is not activated. n, ,,, or ~ ; .,,, Depth: aft. Bottom Length: 200ft. Bottom Width loft. Side slope 1: 3 To 1 Side slope 2: 3 To 1 Side slope 3: 3 To 1 Side slope 4: 3 To 1 Volume at Riser Head: Discharge Structure Riser Hea.ght: 0.5 ft. Riser Da.ameter: 54 in. 0.027 acre-ft. Pond Hydraulic Table Stage (f t) Area(acr) Volume(acr-f t) Dschrg(cfs) Infilt(cfs) 331.7 0.046 0.000 0.000 0.000 33].8 0.048 0.004 0.000 0.463 331.9 0.050 0.007 0.000 0.463 331.9 0.053 0.012 0.000 0.463 332.0 0.055 0.016 0.000 0.463 n 1 ~~~~,~t~ 09-22--0, IXPoRES 9~-2?- p~~~ 332.1 0.057 0.020 0.000 0.463 332.2 0.060 0.025 0.000 0.463 X332.2 0.062 0.029 0.411 0.463 332.3 0.064 0.034 1.873 0.463 332.4 0.067 0.039 3.920 0.963 332.5 0.069 0.095 6.416 0.963 332.6 0.071 0.050 9.292 0.463 332.6 0.074 0.056 12.50 0.463 332.7 0.076 0.061 16.01 0.963 332.8 0.078 0.067 19.81 0.963 332.9 0.081 0.074 23.86 0.463 332.9 0.083 0.080 28.15 0.463 333.0 0.086 0.087 32.67 0.463 333.1 0.088 0.093 37.42 0.463 333.2 0.090 0.100 42.37 0.463 333.3 0.093 0.107 47.53 0.463 333.3 0.095 0.115 52.88 0.963 333.9 0.098 0.122 58.41 0.463 333.5 0.100 0.130 64.13 0.963 333.6 0.103 0.138 70.02 0.463 333.6 0.105 0.146 76.08 0.463 333.7 0.108 0.154 82.31 0.463 333.8 0.110 0.163 88.70 0.463 333.9 0.113 0.171 95.24 0.963 334.0 0.115 0.180 101.9 0.463 339.0 0.118 0.189 108.8 0.463 334.1 0.120 0.199 115.8 0.463 334.2 0.123 0.208 122.9 0.463 334.3 0.126 0.218 130.2 0.463 334.3 0.128 0.228 137.6 0.963 334.4 0.131 0.238 145.2 0.963 334.5 0.133 0.248 152.9 0.463 334.6 0.136 0.258 160.7 0.463 334.7 0.139 0.269 168.6 0.463 334.7 0.141 0.280 176.7 0.463 ANALYSIS RESULTS Flow Frequency Return Periods for Predeveloped Return Period Flow(cfs) 2 year 0.353994 5 year 0.431074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Unmitigated Return Period Flow(efs) 2 year 0.353994 5 year 0.431074 10 year 0.478881 25 year 0.53661 50 year 0.578083 100 year 0.618503 Flow Frequency Return Periods for Developed Mitigated Return Period Flow(cfs) 2 year 0.59587 5 year 1.518176 10 year 2.680528 25 year 5.094867 50 year 7.701283 100 year 11.37838 Yearly Peaks for Predeveloped and Developed-Mitigated Year Predeveloped Developed 1956 0.334 0.000 1957 0.540 0.000 1958 0.310 0.000 1959 0.362 0.000 1960 0.399 0.000 1961 0.265 0.000 1962 0.286 0.000 1963 0.575 0.000 1964 0.417 0.000 1965 0.391 0.000 1966 0.275 0.000 1967 0.337 0.000 1968 0.264 0.000 1969 0.261 0.000 1970 0.260 0.000 1971 0.324 0.000 1972 0.387 0.000 1973 0.306 0.000 1974 0.357 0.000 1975 0.309 0.000 1976 0.356 0.000 1977 0.450 0.000 1978 0.383 0.000 1979 0.455 0.000 1980 0.342 0.000 1981 0.391 0.000 1982 0.452 0.000 1983 0.483 0.000 1984 0.295 0.000 1985 0.341 0.000 1986 0.380 0.000 1987 0.407 0.000 1988 0.226 0.000 1989 0.270 0.000 1990 0.533 0.000 1991 0.590 0.000 1992 0.332 0.000 1993 0,.243 0.000 1994 0.270 0.000 1995 0.392 0.000 1996 0.398 0.000 1997 0.320 0.000 1998 0.449 0.000 1999 0.385 0.000 Ranked Yearly Peaks for Predeveloped and Developed-Mitigated Rank Predeveloped Developed 1 0.5397 0.0000 2 0.5395 0.0000 3 0.5326 0.0000 4 0.4834 0.0000 5 0.4554 0.0000 6 0.9515 0.0000 7 0.9503 0.0000 8 0.4488 0.0000 9 0.4169 0.0000 10 0.9075 0.0000 11 0.3986 0.0000 12 0.3976 0.0000 13 0.3917 0.0000 14 0.3914 0.0000 15 0.3907 0.0000 16 0.3866 0.0000 17 0.3855 0.0000 18 0.3826 0.0000 19 0.3797 0.0000 20 0.3622 0.0000 21 0.3567 0.0000 22 0.3559 0.0000 .23 0.3415 0.0000 24 0.3411 0.0000 25 0.3366 0.0000 26 0.3343 0.0000 27 0.3322 0.0000 28 0.3236 0.0000 29 0.3203 0.0000 30 0.3101 0.0000 31 0.3090 0.0000 32 0.3063 0.0000 33 0.2999 0.0000 39 0.2861 0.0000 35 0.2755 0.0000 36 0.2705 0.0000 37 0.2704 0.0000 38 0.2655 0.0000 39 0.2640 0.0000 40 0.2608 0.0000 41 0.2605 0.0000 42 0.2439 0.0000 43 0.2260 0.0000 1/2 2 year to 50 year Flow(CFS) Predev Final Perc entage P ass/Fail 0.1770 1060 0 .0 Pass 0.1810 974 0 .0 Pass 0.1851 906 0 .0 Pass 0.1892 836 0 .0 Pass 0.1932 785 0 .0 Pass 0.1973 717 0 .0 Pass 0.2013 669 0 .0 Pass 0.2054 624 0 .0 Pass 0.2094 584 0 .0 Pass 0.2135 538 0 .0 Pass 0.2175 503 0 .0 Pass 0.2216 461 0 .0 Pass 0.2256 435 0 .0 Pass 0.2297 399 0 .0 Pass 0.2337 365 0 .0 Pass 0.2378 342 0 .0 Pass 0.2418 315 0 .0 Pass 0.2459 297 0 .0 Pass 0.2499 278 0 .0 Pass 0.2540 256 0 .0 Pass 0.2580 238 0 .0 Pass 0.2621 221 0 .0 Pass 0.2661 200 0 .0 Pass 0.2702 189 0 .0 Pass 0.2742 172 0 .0 Pass 0.2783 167 0 .0 Pass 0.2823 161 0 .0 Pass 0.2864 155 0 .0 Pass 0.2904 147 0 .0 Pass 0.2995 142 0 .0 Pass 0.2985 138 0 .0 Pass 0.3026 137 0 .0 Pass 0.3066 126 0 .0 Pass 0.3107 117 0 .0 Pass 0.3147 109 0 .0 Pass 0.3188 104 0 .0 Pass 0.3228 98 0 .0 Pass 0.3269 91 0 .0 Pass 0.3309 87 0 .0 Pass 0.3350 80 0 .0 Pass 0.3391 74 0 .0 Pass 0.3931 67 0 .0 Pass 0.3472 66 0 .0 Pass 0.351.2 60 0 .0 Pass 0.3553 58 0 .0 Pass '0.3593 54 0 .0 Pass 0.3639 50 0 .0 Pass 0.3674 46 0 .0 Pass 0.3715 46 0 .0 Pass 0.3755 41 0 .0 Pass 0.3796 38 0 .0 Pass 0.3836 36 0 .0 Pass 0.3877 34 0 .0 Pass 0.3917 29 0 .0 Pass 0.3958 26 0 .0 Pass 0.3998 23 0 .0 Pass 0.9039 23 0 .0 Pass 0.4079 20 0 .0 Pass 0.4120 19 0 .0 Pass 0.4160 18 0 .0 Pass 0.9201 16 0 .0 Pass 0.4241 16 0 .0 Pass 0.4282 16 0 .0 Pass 0.4322 15 0 .0 Pass 0.4363 14 0 .0 Pass 0.9403 12 0 .0 Pass 0.4444 12 0 .0 Pass 0.4484 12 0 .0 Pass 0.4525 9 0 .0 Pass 0.4565 8 0 .0 Pass 0.4606 8 0 .0 Pass 0.9646 8 0 .0 Pass 0.4687 8 0 .0 Pass 0.9727 8 0 .0 Pass 0.4768 6 0 .0 Pass 0.9809 6 0 .0 Pass 0.4849 5 0 .0 Pass 0.4890 5 0 .0 Pass 0.4930 5 0 .0 Pass 0.9971 5 0 .0 Pass 0.5011 5 0 .0 Pass 0.5052 5 0 .0 Pass 0.5092 5 0 .0 Pass 0.5133 5 0 .0 Pass 0.5173 5 0 .0 Pass 0.5219 5 0 .0 Pass 0.5254 5 0 .0 Pass 0.5295 5 0 .0 Pass 0.5335 4 0 .0 Pass 0.5376 4 0 .0 Pass 0.5416 1 0 .0 Pass 0.5457 1 0 .0 Pass 0.5497 1 0 .0 Pass 0.5538 1 0 .0 Pass 0.5578 1 0 .0 Pass 0.5619 1 0 .0 Pass 0.5659 1 0 .0 Pass 0.5700 1 0 .0 Pass 0.5740 1 0 .0 Pass 0.5781 0 0 .0 Pass Water Quality BMP Flow and Volume. On-line facility volume: 0.169 acre-feet On-line facility target flow: 0.19 c£s. Adjusted for 15 min: 0.22 cfs. Off-line facility target flow: 0.11 cfs. Adjusted for 15 min: 0.12 cfs. program and accompanying documentation as provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program rs assumed by the user. AQUA TERRA Consultants and the Washington State Department of Ecology drsclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall AQUA TERRA Consultants and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the user of, or inability to use this program even if AQUA TERRA Consultants or the Washington State Department of Ecology has been advised of the possibility of such damages. 1Q~ kkkkkkkk7~kY;4¢30~+.~?D;1'~04N5pskKkkkkk?~kkkk P.. '~ 1.0 ..r oaoaaoc>aa+,xpi°~~o~~aaaooo o PYedeveloped ,~ 10E-1 x Developed Mdigated U D! 10E-2 1 10 20 30 dO 30 60 70 BO 90 99 Cumulative Probabili Yearly Peaks for Predeveloped Flow Frequency Chart YEAR ~ FLOW (cis) 100 .6185 -°°-------- 50 5781 ` ' ' " 25 - 5366 10 .4789 ~ ~ 5 ,4311 ` ' C', ~~ _.~ ~ 2 ,3540 ~ -~~.. . ~,#i ', ,,~. arty Peaks for developed W/O Pond YEAR ~ FlO4V (rfs) 100 11 38 ~ ~ ~ { ' 33 r~ ~ ~ t ~ st ~ ~ 1~; i '~ ;; •so = not - - = ~ , ~ E ; i' €~~~~ i Ij~ ` ff 25 ~ 5.045 ' ~~ 3 1 ~ ~ ~ ~ '~ 3 ~ i F{ !~ F s ~ r ~ a t` ~ > 5 5 1518 ~ ~ r ,;,: ~ ~ '~ 2 5459 ~ ~' ~ ~'~ ~~ r o Predeveloped 1~ x Developed w~h Facil~r 048 ., . _• ..... . s _.u . ~^y 038 • ~ _ __ _ __. ..• ~ __ ~__ U ""' 0 28 _. _ ~ __ _• ~ . _ • _ __ ~_ da 018 . _ _ ~ .~ _ _ _ _d__ __ . ~ ... . U _N 10E•5 ~ 10E•d 10E•3 10E•2 10E•1 1 10 Percent Exceeding Duration Graph early Peaks for Developed W/Pond CLEARHIS BSN C1 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C1 BSN C1 0 12 0 20 8 00 0 0407 0 50 SBUH/SCS TYPEIA 6 mo BSN C1 0 32 8 00 8 00 0 0689 0 50 SBUH/SCS TYPEIA 2 yr BSN C1 0 38 8 00 0 1091 0 1294 0 50 0 50 SBUH/SCS TYPE1A 10 yr BSN C1 BSN C 0 40 8 00 0 1396 0 50 SBUH/SCS SBUH/SCS TYPEIA TYPE1A 25 yr 50 r 1 0 43 8 00 0 1498 0 50 SBUH/SCS TYPEIA y 100 yr Drainage Area: BSN C1 Hyd Method. SBUH Hyd Loss Method SCS CN Number Peak Factor: 484.00 SCS Abs 0 20 Storm Dur' 24 00 hrs Intv: 10 00 min Area CN TC Pervious 0 0491 ac 78 00 0 03 hrs Impervious 0.4528 ac 98.00 0.10 hrs Total 0 5019 ac Supporting Data: Pervious CN Data: Type B Soils 78.00 0.0491 ac Impervious CN Data: ROADWAY 98 00 0.3095 ac SIDWALK 98 00 0 1204 ac DRIVEWAY 98 00 0 0229 ac Pervious TC Data: Flow type: Description. Length Slope. Coeff: Travel Time Sheet Across Planter StnP 6 00 ft 2.00% 0.2400 1 90 min Impervious TC Data: . Flow type. Description. Length Slope. Coeff Travel Time Shallow Along Flow Line of Gutter 272 00 ft . 0.50% 27.000 0 3 15 min Sheet Across Roadway 27.00 ft 2.00% 0.0110 . 0 54 min Channel Through Strom Water Pipe 150.00 ft . 0.50% 21.0000 1 68 min Sheet Across Sidewalks 12.00 ft 2.00% 0.0110 0 28 min Sheet Across Driveway 20 00 ft 2 00% 0 0110 0.42 min BSN C2 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C2 0 11 BSN C2 0 18 8 00 8 00 0 0365 0 50 0 0628 SBUHlSCS TYPE1A 6 mo BSN C2 0 29 BSN C2 0 35 8 00 0 50 0 1011 0.50 SBUH/SCS SBUH/SCS TYPEIA 2 yr TYPEIA 10 yr . BSN C2 0 38 8 00 8 00 0 1207 0 50 0 1306 0 50 SBUH/SCS SBUH/SCS TYPEIA 25 yr TYPE1A BSN C2 0 40 yr 8 00 0 1405 0 50 SBUH/SCS 50 yr TYPEIA 100 Drainage Area: BSN C2 Hyd Method: SBUH Hyd Loss Method: SCS CN Number Peak Factor: 484 00 SCS Abs~ 0 20 Storm Dur 24.00 hrs Intv. . 10 00 min Area CN TC Pervious 0.0997 ac 78 00 0.03 hrs Impervious 0.3977 ac 98.00 0 10 hrs Total 0 4974 ac Supporting Data: Pervious CN Data: Type B Sods 78.00 0.0997 ac Impervious CN Data: ROADWAY 98 00 0 2486 ac SIDWALK 98.00 0.0343 ac DRIVEWAY 98.00 0.1148 ac Pervious TC Data: Flow type: Description: Length: Slope. Coeff' Travel Time Sheet Across Planter Stnp 6.00 ft 2 00% 0.2400 1 90 min Impervious TC Data: Flow type: Description• Length: Slope Coeff• Travel Time Shallow Along Flow Line of Gutter 292 00 ft 0 50% 27 0000 3.39 min Sheet Across Roadway 18.50 ft 2.00% 0.0110 0.40 mm Channel Through Strom Water Pipe 150 00 ft 0 50% 21 0000 1.68 min Sheet Across Sidewalks 5.00 ft 2 00% 0.0110 0 14 min Sheet Across Driveway 20 00 ft 2 00% 0.0110 0.42 min BSN C3 Event Summary: BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event ------- (cfs) (hrs) (ac-ft) ac /Loss BSN C3 0 07 7 83 0 0243 0 35 SBUH/SCS TYPEIA 6 mo BSN C3 0 12 7 83 0 0424 0 35 SBUH/SCS TYPEIA 2 yr BSN C3 0 20 7 83 0 0689 0 35 SBUH/SCS TYPEIA 10 yr BSN C3 0 24 7 83 0 0825 0 35 SBUH/SCS TYPE1A 25 yr BSN C3 0 26 7 83 0 0894 0 35 SBUH/SCS TYPEIA 50 yr BSN C3 0 28 7 83 0 0963 0 35 SBUHlSCS TYPE1A 100 yr Drainage Area: BSN C3 Hyd Method SBUH Hyd Loss Method SCS CN Number Peak Factor: 484.00 SCS Abs 0 20 Storm Dur: 24.00 hrs Intv: 10. 00 min Area CN TC Pervious 0 0891 ac 78.00 0 03 hrs Impervious 0.2621 ac 98 00 0.06 hrs Total 0.3512 ac Supporting Data: Pervious CN Data: Type B Soils 78 00 0 0891 ac Impervious CN Data: DRIVEWAY 98 00 0.0688 ac SIDWALK 98.00 0 0275 ac ROADWAY 98.00 0.1658 ac Pervious TC Data: Flow type: Description: Length Slope Coeff: Travel Time Sheet Across Planter Strip 6.00 ft 2 00% 0.2400 1.90 mm Impervious TC Data: Flow type Description Length• Slope. Coeff. Travel Time Shallow Along Flow Line of Gutter 217 00 ft 1.27% 27 0000 1 19 min Sheet Across Roadway 18 50 ft 2 00% 0 0110 0 40 min Channel Through Strom Water Pipe 180 00 ft 0 50% 21.0000 . 2 02 min Sheet Across Sidewalks 5.00 ft 2 00% 0 0110 . 0.14 min ADDHYD [BSN C1) AS (6 mo] [BSN C2] AS [6 mo] TO [BSN C1 +BSN C2) Peak Flow 0.2269 cfs Peak Time 8 00 hrs Hyd Vol: 3362 93 cf - 0 0772 acft ADDHYD [BSN C1] AS [2 yr] [BSN C2] AS [2 yr] TO [BSN C1 +BSN C2] Peak Flow. 0.3842 cfs Peak Time• 8 00 hrs Hyd Vol. 5739 11 cf - 0.1318 acft ADDHYD [BSN C1j AS [10 yr] [BSN C2] AS [10 yrj TO [BSN C1 +BSN C2] Peak Flow• 0 6091 cfs Peak Time. 8 00 hrs Hyd Vol. 9155 95 cf - 0.2102 acft ADDHYD [BSN C1] AS [25 yr] [BSN C2] AS [25 yr) TO [BSN C1 +BSN C2j Peak Flow: 0.7229 cfs Peak Time: 8.00 hrs Hyd Vol: 10893 56 cf - 0.2501 acft ADDHYD [BSN C1) AS [50 yr) [BSN C2] AS [50 yr] TO [BSN C1 +BSN C2j Peak Flow: 0.7800 cfs Peak Time. 8 00 hrs Hyd Vol• 11766.94 cf - 0.2701 acft ADDHYD (BSN C1j AS [100 yrj [BSN C2j AS [100 yrj TO [BSN C1 +BSN C2) Peak Flow 0.8373 cfs Peak Time 8 00 hrs Hyd Vol. 12643.01 cf - 0.2902 acft ADDHYD [BSN C1 +BSN C2] AS (6 moj [BSN C3] AS [6 mo] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow• 0 2969 cfs Peak Time. 8 00 hrs Hyd Vol. 4421 34 cf - 0 1015 acft ADDHYD [BSN C1 +BSN C2j AS (2 yr] [BSN C3j AS [2 yr] TO [BSN C1 +BSN C2 +BSN C3j Peak Flow 0 5042 cfs Peak Time 8 00 hrs Hyd Vol• 7588.15 cf - 0.1742 acft ADDHYD (BSN C1 +BSN C2] AS [10 yr] [BSN C3] AS [10 yr) TO [BSN C1 +BSN C2 +BSN C3) Peak Flow. 0 8091 cfs Peak Time• 8.00 hrs Hyd Vol. 12157.59 cf - 0.2791 acft ADDHYD [BSN C1 +BSN C2) AS [25 yr] [BSN C3] AS [25 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow. 1.0200 cfs Peak Time• 8.00 hrs Hyd Vol: 14488 05 cf - 0 3326 acft ADDHYD [BSN C1 +BSN C2] AS [50 yr] (BSN C3] AS [50 yr] TO [BSN C1 +BSN C2 +BSN C3] Peak Flow• 1 0400 cfs Peak Time. 8 00 hrs Hyd Vol• 15659 82 cf - 0.3595 acft ADDHYD [BSN C1 +BSN C2) AS [100 yr) [BSN C3] AS [100 yr] TO [BSN C1 +BSN C2 + BSN C3] Peak Flow• 1.1130 cfs Peak Time 8 00 hrs Hyd Vol: 16836.30 cf - 0.3865 acft Hydrograph ID: BASIN C Area: 1.3505 ac Hyd Int• 10.00 min Base Flow. Peak Flow. 1.1130 cfs Peak Time 8 00 hrs Hyd Vol. 0 3865 acft Time Flow Time Flow Time Flow hr cfs hr cfs hr cfs 0 67 0 0034 8 67 0 4696 16 50 0 1554 0 83 0 0135 8 83 0 4008 16 67 0 1554 1 00 0 0257 9 00 0 4009 16 83 0 1555 1 17 0 0395 9 17 0 3494 17 00 0 1555 1 33 0 0528 9 33 0 3019 17 17 0 1503 1 50 0.0620 9 50 0 3025 17 33 0 1453 1 67 0 0722 9 67 0 2863 17 50 0 1455 1 83 0 0816 9 83 0 2724 17 67 0 1453 2 00 0 0876 10 00 0 2727 17 83 . 0 1454 2 17 0 0958 10 17 0 2573 18 00 0 1455 2 33 0 1035 10 33 0 2430 18 17 0 1402 2 50 0 1077 10 50 0 2434 18 33 0 1352 2 67 0 1112 10 67 0 2329 18 50 0 1353 2 83 0 1142 10 83 0 2234 18 67 . 0 1352 3 00 0 1168 11 00 0 2237 18 83 0 1353 3 17 0 1191 11 17 0 2184 19 00 0 1353 3 33 0 1210 11 33 0 2138 19 17 0 1300 3 50 0 1228 11 50 0 2140 19 33 0 1250 3 67 0.1281 11 67 0 2088 19 50 0 1251 3 83 0 1335 11 83 0 2041 19 67 0 1250 4 00 0 1350 12 00 0 2043 19 83 0 1251 4 17 0 1441 12 17 0 1991 20 00 0 1251 4 33 0 1533 12 33 0 1943 20 17 0 1251 4 50 0 1549 12 50 0 1945 20 33 0 1252 4 67 0 1640 12 67 0 1892 20 50 0 1252 4 83 0.1736 12 83 0 1845 20 67 0 1252 5 00 0 1758 13 00 0 1846 20 83 0 1253 517 0.1859 1317 01846 2100 01253 5 33 0 1961 13 33 0 1848 21 17 0 1253 5 50 0 1981 13 50 0 1848 21 33 0 1254 5 67 0 2084 13 67 0 1797 21.50 0 1254 5 83 0 2187 13 83 0 1748 21 67 0 1254 6 00 0 2207 14 00 0 1750 21 83 . 0 1254 6 17 0 2399 14 17 0 1749 22 00 0 1255 6 33 0 2593 14 33 0 1751 22 17 . 0 1201 6 50 0 2616 14 50 0 1751 22 33 0 1151 6 67 0 2907 14 67 0 1700 22 50 0 1152 6 83 0 3196 14 83 0 1651 22 67 0 1151 7 00 0 3224 15 00 0 1652 22 83 0 1152 7 17 0 3573 15 17 0 1651 23 00 0 1151 7 33 0 3915 15 33 0 1653 23 17 0 1152 7 50 0 3947 15 50 0.1653 23 33 0 1152 7 67 0 7459 15 67 0 1601 23 50 0 1152 7 83 1 0957 15 83 0 1552 23 67 0 1152 8 00 1 1130 16 00 0 1553 23 83 0 1153 8 17 0 8325 16 17 0 1552 24 00 0 1153 8 33 0 5486 16 33 0.1553 24 17 0 0558 8 50 0 5512 16 50 0 1554 24.33 0 0039 Hydrograph ID: BASIN C Area 1 3505 ac Hyd Int: 10 00 min Base Flow: Peak Flow. 1 1130 cfs Peak Time 8.00 hrs Hyd Vol 0 3865 acft MOVEHYD [BASIN C] TO (BASIN C - 6 mo] AS [6 mo] Peak Flow. 0 2969 cfs Peak Time 8 00 hrs Hyd Vol 4421 34 cf - 0 1015 acft MOVEHYD [BASIN C] TO [BASIN C - 100 yr] AS [100 yr] Peak Flow 1.1130 cfs Peak Time 8 00 hrs Hyd Vol. 16836 30 cf - 0.3865 acft e Control Structure ID: INFILTRATION -Infiltration control structure Descrip Multiple Orifice Start EI Max EI Increment 326.0000 ft 332.2000 ft 0.10 Infil: 10 00 in/hr nn. ~i+~„i~o,-~ , ~~ Reach ID: BIOSWALE C Section Properties: Shape• S Ditch Routing Method• Travel Time Translation ize Material Manning n Hyd params By Corr Metal -n ormal 0.0250 Manning Formula Length Slope Entrance Loss 200.0000 ft 1.00 Width Bank Hgt ss1 ss2 10 0000 ft 3 0000 ft 3.OOh:1 v 3.OOh.1 v Up Node Dn Node Up Invert Dn Invert DUMMY C 0.0000 ft 0 0000 ft Conduit Constraints: Min Vel 0 5000 ft Max Vel 1 0000 ft Min Cov Min Slope Max Slope Min drop . In/Exfil . Hold Up 3.0000 ft Hold Dn 0 5000 ft 2 0000 ft 0 0000 ft Match Inv Allow Smaller 10 0000 in/hr NO NO YES NO Conduit Summary: Trib Area Flow Capacity Velocity Normal Depth 0 0000 ac 0.0000 cf 0 OOOOcf 0.0000 ft/s 0 0000 ft Ent Loss Exit Loss Frict Loss . Start TW 0 000000 ft 0.000000 ft 0.000000 ft 0 0000 ft ROUTEHYD [BASIN C - 6 mo] THRU [BIOSWALE C] USING THUR10 RELATIVE 0Y AND [6 mo] ZERO Reach / Hyd Area Flow Full Q % Full nDepth Size nVel fVel CBasin ----- -- ac cfs cfs ratio ft ---- ft/s ft/s -------_-- BIOSWALE C 1 3505 0 2969 ---- 1 00 0 1004 Ditch 0 6194 ----- BASw r. ROUTEHYD [BASIN C - 100 yr) THRU [BIOSWALE C] USING THUR100Y AND [100 yr) ZERO RELATIVE Reach Area Flow Full Q % Full nDepth Size nVel fVel CBasin / Hyd ----- ac cfs cfs ratio ft ---- __ ft/s ft/s BIOSWALE C 1 3505 1 1130 ---- 1 00 0 2164 Ditch 0 9956 ----- BASIN C Node ID: INFILTRATION C Desc. Manhole structure Start EI. 332.2000 ft Max EI: 333 2000 ft Contrib Basin• Contrib Hyd. Length Width Void Ratio 200 0000 ft 10 0000 ft 39 00 Bottom area only with infiltration P 0 Node ID: BASIN C RLP Desc• Manhole structure Start EI 332.2000 ft Max EI: 333.2000 ft Contrib Basin Contrib Hyd Storage Id. INFILTRATION C Discharge Id: INFILTRATION RLPCOMPUTE [BASIN C RLP) SUMMARY 100 yr MatchO=PeakQ= 1 1130 cfs Peak Out O. 0 3704 cfs -Peak Stg• 333 40 ft - Active Vol• 1870 37 cf