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2021.0411.BP0037 01_Tahoma Golf Course - Drainage Report - Signed
DEA Job No. TGCC0000-0001 Page 1 August 6, 2021 Tahoma Golf Course Maintenance Facility DRAINAGE REPORT CITY OF YELM, WASHINGTON Prepared For: Tahoma Golf Course & Country Club 15425 Mosman Avenue SW Yelm, WA 98597 Issued: August 6, 2021 Prepared By: Sean Moriarty, PE & Makenzie Williams, PE Reviewed By: Scott Emmens, PE EXPIRES: 12/02/2021 DEA Job No. TGCC0000-0001 Page 2 August 6, 2021 TABLE OF CONTENTS 1 PROJECT OVERVIEW ................................................................................................... 3 2 EXISTING CONDITIONS ................................................................................................ 4 3 DEVELOPED CONDITIONS............................................................................................ 4 4 STORMWATER POLLUTION PREVENTION .................................................................... 5 4.1 MINIMUM REQUIREMENTS .......................................................................................................... 5 4.2 TEMPORARY EROSION AND SEDIMENT CONTROL ................................................................................ 6 5 CONVEYANCE SYSTEM ANALYSIS & DESIGN ................................................................ 6 6 OPERATIONS AND MAINTENANCE .............................................................................. 6 7 APPENDICIES .............................................................................................................. 7 7.1 EXISTING CONDITIONS PLAN ...................................................................................................... 8 7.2 NRCS SOIL SURVEY MAP .............................................................................................................. 9 7.3 BASIN MAP ..................................................................................................................................... 10 7.4 WWHM CALCULATIONS ............................................................................................................. 11 7.5 2019 DOE MANUAL MINIMUM REQUIREMENT FLOWCHART ............................................ 12 7.6 OPERATIONS AND MAINTENANCE ........................................................................................... 13 DEA Job No. TGCC0000-0001 Page 3 August 6, 2021 1 PROJECT OVERVIEW The project is in a portion of NE 1/4 of the SE 1/4, Section 24, Township 17N, Range 1 E. Parcel B, Adjustment #BLA-1142, Auditor’s File No. 9112110209, TPN 21724440200, Thurston County. 15425 Mosman Ave SW, Yelm, WA 98597. This report addresses the stormwater management related to the proposed construction of a maintenance building, utilities, parking lot, driveway, and associated stormwater facility at the Tahoma Golf Course & Country Club. This project is being developed because of the proposed road improvements connecting Longmire St SE with SW Mossman Ave. The proposed road alignment requires the demolition of an existing maintenance building at the NW corner of the Tahoma Golf Course and the subsequent construction of the proposed onsite improvements. The proposed improvements will meet the requirements of the City of Yelm’s Development Guidelines and the Department of Ecology’s 2019 Stormwater Management Manual for Western Washington (2019 DOE Manual) as adopted by the City of Yelm. DEA Job No. TGCC0000-0001 Page 4 August 6, 2021 2 EXISTING CONDITIONS The site is currently a golf course with associated maintained lawn and vegetation. The topography generally slopes to the west, towards Longmire St SE with slopes of approximately 2%. No existing utilities are present within the proposed development area. See Exhibit 1 for Existing Conditions Plan. Soil mapping from the NRCS indicates that the underlying soil is Hydrologic Soil Group A and infiltration rates are generally high with low runoff potential. See Appendix 7.2 for NRCS Soil Survey map. 3 DEVELOPED CONDITIONS The proposed development is comprised of a 2,400 square feet (sf) warehouse, a 158 sf fuel cell storage enclosure and 5,060 sf of paving with perimeter landscaped areas to be planted with shrub vegetation and lawn. See Appendix 7.3 for Basin Map. Stormwater is to be handled entirely on site via a Bioretention Cell, per BMP T7.30 in the 2019 DOE Manual. The Bioretention Cell will provide effective removal of stormwater pollutants and provide a reduction in stormwater runoff quantity and surface runoff flow rates. Based on a geotechnical report prepared by Pan GEO and dated December 5, 2017, the estimated long-term infiltration rate is 33.3 inches/hour. Per the geotechnical report recommendations, the maximum design infiltration used is 10 inches/hour, with a 0.5 factor of safety. Because the native soil has adequate infiltration rates, the bioretention cell will provide both runoff treatment and flow control that meet the requirements of the 2019 DOE Manual. The Bioretention Cell has been sized according the Western Washington Hydrology Model (WWHM). See Appendix 7.4 - WWHM calculations. DEA Job No. TGCC0000-0001 Page 5 August 6, 2021 4 STORMWATER POLLUTION PREVENTION 4.1 MINIMUM REQUIREMENTS Per the 2019 DOE Manual, the following Minimum Requirements apply to this project. See Appendix 7.5 - 2019 DOE Manual Minimum Requirement Flowchart. Minimum Requirement #1: Preparation of Stormwater Site Plans This report, along with the associated Tahoma Golf Course Maintenance Facility Plans, serve as the Stormwater Site Plan for the Tahoma Golf Course Maintenance Facility Improvements. Minimum Requirement #2: Construction Stormwater Pollution Prevention See Section 4.2 – Temporary Erosion and Sediment Control. Minimum Requirement #3: Source Control of Pollution See Section 4.2 – Temporary Erosion and Sediment Control. Minimum Requirement #4: Preservation of Natural Drainage Systems and Outfalls The project site is underlain by high infiltration soils. In the existing condition, runoff from the project site flows onto the existing golf course lawn, where it is infiltrated into the existing native soil. In the developed condition, the runoff from the project will be conveyed to onsite infiltration facilities in the form of a Bioretention Cell. Minimum Requirement #5: On-site Stormwater Management The stormwater concept for the Tahoma Golf Course Maintenance Facility Improvements proposes to infiltrate all stormwater. See Section 3 – Developed Conditions for further discussion of infiltration. Minimum Requirement #6: Runoff Treatment Water quality will be provided by the proposed Bioretention Cell. See Section 3 – Developed Conditions for further discussion of runoff treatment. DEA Job No. TGCC0000-0001 Page 6 August 6, 2021 Minimum Requirement #7: Flow Control All stormwater runoff from the project is ultimately proposed to be infiltrated to groundwater within the Bioretention Cell. Minimum Requirement #8: Wetlands Protection There are no wetlands located on or adjacent to the project site. Minimum Requirement #9: Operation and Maintenance See Section 6 - Operations and Maintenance. 4.2 Temporary Erosion and Sediment Control A Temporary Erosion and Sediment Control (TESC) Plan has been prepared for this project per City of Yelm requirements. The TESC plan is intended to prevent the transport of sediment from the site to significant drainage features and adjacent properties. A construction stormwater general permit will be required from the Washington State Department of Ecology. A Stormwater Pollution Prevention Plan (SWPPP) has been prepared for the site, with construction plans, to prevent uncontrolled release of sediments from the site. The SWPPP includes water quality monitoring requirements if discharges from the site occur during construction. Temporary erosion and sediment control (TESC) best management practices (BMPs) will be utilized during construction. 5 CONVEYANCE SYSTEM ANALYSIS & DESIGN The proposed conveyance system will be comprised of PVC or HDPE pipe design to accommodate the 25-year peak flows from the project area. All conveyance systems will be designed in accordance with the City of Yelm Standards. 6 OPERATIONS AND MAINTENANCE See Appendix 7.6 - Operations and Maintenance for the Bioretention Cell from the 2019 DOE Manual “Table V-A.21: Maintenance Standards – Bioretention Facilities”. DEA Job No. TGCC0000-0001 Page 7 August 6, 2021 7 APPENDICIES DEA Job No. TGCC0000-0001 Page 8 August 6, 2021 7.1 EXISTING CONDITIONS PLAN LONGMIRE ST SE SW MOSMAN AVE(PER CITY OF YELM, SW MOSMAN AVENUE PHASE2 DEVELOPMENT PROJECT)Plot Date: 8/4/2021 8:53 AM By: Makenzie WilliamsSave Date: 8/4/2021 8:40 AM By: Mkbu Drawing File: P:\T\TGCC00000001\0400CAD\EXHIBITS\01_Storm Report\EX01_Existing Conditions.dwg DATE:DESIGN:SHEET NO.PROJECT NO.PROJECT SHEET TITLEDRAWN:®Phone: 503.223.6663Portland Oregon 972012100 S River Parkway, Suite 100TAHOMA GOLF COURSE& COUNTRY CLUB YELM, WASHINGTONPERMIT SET08/06/2021MKBULRSHTGCC0000-0001EXISTING LAWNTEMPORARY CONSTRUCTION EASEMENTEXISTING FENCEEX01EXISTING CONDITIONSBASIN INFORMATIONAREARECEIVING STRUCTUREIMPERVIOUS AREA0 SF (0.00 AC)INFILTRATIONPERVIOUS AREA18,181 SF (0.42 AC)INFILTRATIONEXISTING MAINTENANCE BUILDING(TO BE DEMOLISHED)PARCEL BTHURSTON COUNTY BOUNDARY LINEADJUSTMENT #BLA-1142AUDITOR'S FILE NO. 9112110209RECORDS OF THURSTON COUNTY, WA.TPN 21724440200052010SCALE: 1" = 10'1"=20' IF PLOTTED ON 11X17 DEA Job No. TGCC0000-0001 Page 9 August 6, 2021 7.2 NRCS SOIL SURVEY MAP Hydrologic Soil Group—Thurston County Area, Washington (Yelm Golf Course) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 1 of 45198860519887051988805198890519890051989105198920519893051988605198870519888051988905198900519891051989205198930529190529200529210529220529230529240529250529260529270529280529290529300529310 529190 529200 529210 529220 529230 529240 529250 529260 529270 529280 529290 529300 529310 46° 56' 35'' N 122° 36' 59'' W46° 56' 35'' N122° 36' 53'' W46° 56' 33'' N 122° 36' 59'' W46° 56' 33'' N 122° 36' 53'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 25 50 100 150Feet 0 5 10 20 30Meters Map Scale: 1:558 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Thurston County Area, Washington Survey Area Data: Version 14, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 18, 2020—Jul 20, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Hydrologic Soil Group—Thurston County Area, Washington (Yelm Golf Course) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 2 of 4 Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 110 Spanaway gravelly sandy loam, 0 to 3 percent slopes A 0.6 100.0% Totals for Area of Interest 0.6 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Hydrologic Soil Group—Thurston County Area, Washington Yelm Golf Course Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 3 of 4 Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Thurston County Area, Washington Yelm Golf Course Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 4 of 4 Saturated Hydraulic Conductivity (Ksat)—Thurston County Area, Washington (Yelm Golf Course) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 1 of 35198860519887051988805198890519890051989105198920519893051988605198870519888051988905198900519891051989205198930529190529200529210529220529230529240529250529260529270529280529290529300529310 529190 529200 529210 529220 529230 529240 529250 529260 529270 529280 529290 529300 529310 46° 56' 35'' N 122° 36' 59'' W46° 56' 35'' N122° 36' 53'' W46° 56' 33'' N 122° 36' 59'' W46° 56' 33'' N 122° 36' 53'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 25 50 100 150Feet 0 5 10 20 30Meters Map Scale: 1:558 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons = 287.1698 Not rated or not available Soil Rating Lines = 287.1698 Not rated or not available Soil Rating Points = 287.1698 Not rated or not available Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Thurston County Area, Washington Survey Area Data: Version 14, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 18, 2020—Jul 20, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Saturated Hydraulic Conductivity (Ksat)—Thurston County Area, Washington (Yelm Golf Course) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 2 of 3 Saturated Hydraulic Conductivity (Ksat) Map unit symbol Map unit name Rating (micrometers per second) Acres in AOI Percent of AOI 110 Spanaway gravelly sandy loam, 0 to 3 percent slopes 287.1698 0.6 100.0% Totals for Area of Interest 0.6 100.0% Description Saturated hydraulic conductivity (Ksat) refers to the ease with which pores in a saturated soil transmit water. The estimates are expressed in terms of micrometers per second. They are based on soil characteristics observed in the field, particularly structure, porosity, and texture. Saturated hydraulic conductivity is considered in the design of soil drainage systems and septic tank absorption fields. For each soil layer, this attribute is actually recorded as three separate values in the database. A low value and a high value indicate the range of this attribute for the soil component. A "representative" value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. The numeric Ksat values have been grouped according to standard Ksat class limits. Rating Options Units of Measure: micrometers per second Aggregation Method: Dominant Component Component Percent Cutoff: None Specified Tie-break Rule: Fastest Interpret Nulls as Zero: No Layer Options (Horizon Aggregation Method): Depth Range (Weighted Average) Top Depth: 18 Bottom Depth: 96 Units of Measure: Inches Saturated Hydraulic Conductivity (Ksat)—Thurston County Area, Washington Yelm Golf Course Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 4/7/2021 Page 3 of 3 DEA Job No. TGCC0000-0001 Page 10 August 6, 2021 7.3 BASIN MAP BASIN MAPEX02Plot Date:8/4/2021 8:54 AM By: Makenzie WilliamsSave Date: 8/4/2021 8:37 AM By: Mkbu Drawing File: P:\T\TGCC00000001\0400CAD\EXHIBITS\01_Storm Report\EX02_Basin Map.dwg DATE:DESIGN:SHEET NO.PROJECT NO.PROJECT SHEET TITLEDRAWN:®Phone: 503.223.6663Portland Oregon 972012100 S River Parkway, Suite 100TAHOMA GOLF COURSE& COUNTRY CLUB YELM, WASHINGTONPERMIT SET08/06/2021MKBULRSHTGCC0000-0001052010SCALE: 1" = 10'BASIN INFORMATIONPROPOSED DEVELOPMENTAREARECEIVING STRUCTUREBASIN 1 IMPERVIOUS AREA7,618 SF (0.18 AC)BIORETENTION CELLBASIN 1 PERVIOUS AREA9,758 SF (0.22 AC)BIORETENTION CELLBASIN 2 IMPERVIOUS AREA805 SF (0.02 AC)INFILTRATIONSW MOSMAN AVELONGMIRE STREET SE BIORETENTIONCELLMAINTENANCEBUILDINGFUEL TANK STORAGEENCLOSUREBASIN 1 EXTENTS1"=20' IF PLOTTED ON 11X17 DEA Job No. TGCC0000-0001 Page 11 August 6, 2021 7.4 WWHM CALCULATIONS WWHM2012 PROJECT REPORT Final_Tahoma Golf Course 8/3/2021 5:18:01 PM Page 2 General Model Information Project Name: Final_Tahoma Golf Course Site Name: Tahoma Golf Course Site Address: 15425 Mosman Ave SW, Yelm, WA 98597 City:Yelm Report Date: 8/3/2021 Gage:Lake Lawrence Data Start: 1955/10/01 Data End: 2008/09/30 Timestep: 15 Minute Precip Scale: 0.857 Version Date: 2018/10/10 Version: 4.2.16 POC Thresholds Low Flow Threshold for POC1: 50 Percent of the 2 Year High Flow Threshold for POC1: 50 Year Final_Tahoma Golf Course 8/3/2021 5:18:01 PM Page 3 Landuse Basin Data Predeveloped Land Use Existing Conditions Bypass:No GroundWater:No Pervious Land Use acre A B, Pasture, Flat 0.42 Pervious Total 0.42 Impervious Land Use acre Impervious Total 0 Basin Total 0.42 Element Flows To: Surface Interflow Groundwater Final_Tahoma Golf Course 8/3/2021 5:18:01 PM Page 4 Mitigated Land Use Developed Conditions Bypass:No GroundWater:No Pervious Land Use acre A B, Lawn, Flat 0.22 Pervious Total 0.22 Impervious Land Use acre PARKING FLAT 0.18 Impervious Total 0.18 Basin Total 0.4 Element Flows To: Surface Interflow Groundwater Surface ention Cell Surface ention Cell Final_Tahoma Golf Course 8/3/2021 5:18:01 PM Page 5 Routing Elements Predeveloped Routing Final_Tahoma Golf Course 8/3/2021 5:18:01 PM Page 6 Mitigated Routing Bioretention Cell Bottom Length: 37.00 ft. Bottom Width: 8.00 ft. Material thickness of first layer: 0.25 Material type for first layer: SMMWW 12 in/hr Material thickness of second layer: 1.5 Material type for second layer: Sand Material thickness of third layer: 0 Material type for third layer: GRAVEL Infiltration On Infiltration rate:10 Infiltration safety factor:0.5 Wetted surface area On Total Volume Infiltrated (ac-ft.):32.934 Total Volume Through Riser (ac-ft.): 0 Total Volume Through Facility (ac-ft.): 32.934 Percent Infiltrated:100 Total Precip Applied to Facility:1.606 Total Evap From Facility:0.491 Underdrain not used Vertical orifice Outlet Structure Vertical orifice Diameter (in.):0 Vertical orifice Elevation (in.):0 Width of overroad flow (feet):0.5 Element Flows To: Outlet 1 Outlet 2 Bioretention Hydraulic Table Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs) 0.0000 0.0202 0.0000 0.0000 0.0000 0.0247 0.0200 0.0000 0.0000 0.0000 0.0495 0.0198 0.0001 0.0000 0.0000 0.0742 0.0196 0.0001 0.0000 0.0000 0.0989 0.0193 0.0002 0.0000 0.0000 0.1236 0.0191 0.0002 0.0000 0.0001 0.1484 0.0189 0.0002 0.0000 0.0002 0.1731 0.0187 0.0003 0.0000 0.0003 0.1978 0.0185 0.0003 0.0000 0.0004 0.2225 0.0182 0.0004 0.0000 0.0005 0.2473 0.0180 0.0004 0.0000 0.0006 0.2720 0.0178 0.0005 0.0000 0.0007 0.2967 0.0176 0.0005 0.0000 0.0009 0.3214 0.0174 0.0006 0.0000 0.0012 0.3462 0.0172 0.0006 0.0000 0.0015 0.3709 0.0170 0.0006 0.0000 0.0019 0.3956 0.0168 0.0007 0.0000 0.0023 0.4203 0.0165 0.0007 0.0000 0.0025 0.4451 0.0163 0.0008 0.0000 0.0028 0.4698 0.0161 0.0008 0.0000 0.0034 0.4945 0.0159 0.0009 0.0000 0.0040 0.5192 0.0157 0.0009 0.0000 0.0047 0.5440 0.0155 0.0010 0.0000 0.0054 0.5687 0.0153 0.0010 0.0000 0.0063 Final_Tahoma Golf Course 8/3/2021 5:18:02 PM Page 7 0.5934 0.0151 0.0011 0.0000 0.0071 0.6181 0.0149 0.0011 0.0000 0.0073 0.6429 0.0147 0.0012 0.0000 0.0084 0.6676 0.0145 0.0013 0.0000 0.0095 0.6923 0.0143 0.0013 0.0000 0.0107 0.7170 0.0141 0.0014 0.0000 0.0120 0.7418 0.0139 0.0014 0.0000 0.0135 0.7665 0.0137 0.0015 0.0000 0.0150 0.7912 0.0135 0.0015 0.0000 0.0157 0.8159 0.0133 0.0016 0.0000 0.0170 0.8407 0.0132 0.0017 0.0000 0.0188 0.8654 0.0130 0.0017 0.0000 0.0207 0.8901 0.0128 0.0018 0.0000 0.0228 0.9148 0.0126 0.0019 0.0000 0.0251 0.9396 0.0124 0.0019 0.0000 0.0274 0.9643 0.0122 0.0020 0.0000 0.0297 0.9890 0.0120 0.0021 0.0000 0.0304 1.0137 0.0118 0.0021 0.0000 0.0331 1.0385 0.0117 0.0022 0.0000 0.0361 1.0632 0.0115 0.0023 0.0000 0.0391 1.0879 0.0113 0.0023 0.0000 0.0424 1.1126 0.0111 0.0024 0.0000 0.0458 1.1374 0.0109 0.0025 0.0000 0.0495 1.1621 0.0108 0.0026 0.0000 0.0515 1.1868 0.0106 0.0026 0.0000 0.0540 1.2115 0.0104 0.0027 0.0000 0.0581 1.2363 0.0102 0.0028 0.0000 0.0625 1.2610 0.0101 0.0029 0.0000 0.0670 1.2857 0.0099 0.0029 0.0000 0.0718 1.3104 0.0097 0.0030 0.0000 0.0768 1.3352 0.0095 0.0031 0.0000 0.0820 1.3599 0.0094 0.0032 0.0000 0.0831 1.3846 0.0092 0.0033 0.0000 0.0855 1.4093 0.0090 0.0034 0.0000 0.0866 1.4341 0.0089 0.0034 0.0000 0.0876 1.4588 0.0087 0.0035 0.0000 0.0887 1.4835 0.0085 0.0036 0.0000 0.0898 1.5082 0.0084 0.0037 0.0000 0.0909 1.5330 0.0082 0.0038 0.0000 0.0920 1.5577 0.0081 0.0039 0.0000 0.0930 1.5824 0.0079 0.0040 0.0000 0.0941 1.6071 0.0077 0.0041 0.0000 0.0952 1.6319 0.0076 0.0042 0.0000 0.0964 1.6566 0.0074 0.0043 0.0000 0.0975 1.6813 0.0073 0.0044 0.0000 0.0986 1.7060 0.0071 0.0044 0.0000 0.0997 1.7308 0.0069 0.0045 0.0000 0.1008 1.7500 0.0068 0.0046 0.0000 0.1017 Bioretention Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)To Amended(cfs)Infilt(cfs) 1.7500 0.0202 0.0046 0.0000 0.0752 0.0011 1.7747 0.0204 0.0051 0.0000 0.0752 0.0023 1.7995 0.0206 0.0056 0.0000 0.0762 0.0034 1.8242 0.0209 0.0061 0.0000 0.0773 0.0046 1.8489 0.0211 0.0067 0.0000 0.0783 0.0057 1.8736 0.0213 0.0072 0.0000 0.0794 0.0069 1.8984 0.0215 0.0077 0.0000 0.0804 0.0081 Final_Tahoma Golf Course 8/3/2021 5:18:02 PM Page 8 1.9231 0.0218 0.0083 0.0000 0.0815 0.0092 1.9478 0.0220 0.0088 0.0000 0.0825 0.0104 1.9725 0.0222 0.0093 0.0000 0.0836 0.0116 1.9973 0.0225 0.0099 0.0000 0.0846 0.0128 2.0220 0.0227 0.0105 0.0000 0.0857 0.0140 2.0467 0.0229 0.0110 0.0000 0.0867 0.0152 2.0714 0.0232 0.0116 0.0000 0.0878 0.0164 2.0962 0.0234 0.0122 0.0000 0.0888 0.0176 2.1209 0.0237 0.0127 0.0000 0.0899 0.0188 2.1456 0.0239 0.0133 0.0000 0.0909 0.0200 2.1703 0.0241 0.0139 0.0000 0.0920 0.0212 2.1951 0.0244 0.0145 0.0000 0.0930 0.0225 2.2198 0.0246 0.0151 0.0000 0.0941 0.0237 2.2445 0.0249 0.0157 0.0412 0.0951 0.0240 2.2500 0.0249 0.0159 0.0412 0.0953 0.9075 Final_Tahoma Golf Course 8/3/2021 5:18:02 PM Page 9 Surface ention Cell Element Flows To: Outlet 1 Outlet 2 Bioretention Cell Final_Tahoma Golf Course 8/3/2021 5:18:02 PM Page 10 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area: 0.42 Total Impervious Area: 0 Mitigated Landuse Totals for POC #1 Total Pervious Area: 0.22 Total Impervious Area: 0.18 Flow Frequency Method: Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.001647 5 year 0.005837 10 year 0.011793 25 year 0.025786 50 year 0.043518 100 year 0.070531 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0 5 year 0 10 year 0 25 year 0 50 year 0 100 year 0 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1956 0.004 0.000 1957 0.005 0.000 1958 0.002 0.000 1959 0.002 0.000 1960 0.001 0.000 1961 0.003 0.000 1962 0.000 0.000 1963 0.006 0.000 1964 0.001 0.000 1965 0.003 0.000 Final_Tahoma Golf Course 8/3/2021 5:18:55 PM Page 11 1966 0.000 0.000 1967 0.002 0.000 1968 0.000 0.000 1969 0.000 0.000 1970 0.000 0.000 1971 0.005 0.000 1972 0.009 0.000 1973 0.001 0.000 1974 0.002 0.000 1975 0.000 0.000 1976 0.001 0.000 1977 0.000 0.000 1978 0.004 0.000 1979 0.000 0.000 1980 0.001 0.000 1981 0.004 0.000 1982 0.003 0.000 1983 0.001 0.000 1984 0.001 0.000 1985 0.000 0.000 1986 0.004 0.000 1987 0.004 0.000 1988 0.000 0.000 1989 0.000 0.000 1990 0.017 0.000 1991 0.006 0.000 1992 0.000 0.000 1993 0.000 0.000 1994 0.000 0.000 1995 0.004 0.000 1996 0.008 0.000 1997 0.007 0.000 1998 0.011 0.000 1999 0.000 0.000 2000 0.001 0.000 2001 0.000 0.000 2002 0.003 0.000 2003 0.000 0.000 2004 0.071 0.000 2005 0.033 0.000 2006 0.028 0.000 2007 0.014 0.000 2008 0.003 0.000 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0712 0.0000 2 0.0333 0.0000 3 0.0278 0.0000 4 0.0169 0.0000 5 0.0140 0.0000 6 0.0111 0.0000 7 0.0089 0.0000 8 0.0081 0.0000 9 0.0074 0.0000 10 0.0061 0.0000 11 0.0059 0.0000 Final_Tahoma Golf Course 8/3/2021 5:18:55 PM Page 12 12 0.0050 0.0000 13 0.0049 0.0000 14 0.0044 0.0000 15 0.0044 0.0000 16 0.0042 0.0000 17 0.0040 0.0000 18 0.0038 0.0000 19 0.0036 0.0000 20 0.0034 0.0000 21 0.0033 0.0000 22 0.0031 0.0000 23 0.0029 0.0000 24 0.0028 0.0000 25 0.0021 0.0000 26 0.0020 0.0000 27 0.0019 0.0000 28 0.0016 0.0000 29 0.0014 0.0000 30 0.0013 0.0000 31 0.0009 0.0000 32 0.0009 0.0000 33 0.0009 0.0000 34 0.0008 0.0000 35 0.0008 0.0000 36 0.0006 0.0000 37 0.0005 0.0000 38 0.0005 0.0000 39 0.0005 0.0000 40 0.0004 0.0000 41 0.0004 0.0000 42 0.0003 0.0000 43 0.0003 0.0000 44 0.0003 0.0000 45 0.0003 0.0000 46 0.0003 0.0000 47 0.0003 0.0000 48 0.0003 0.0000 49 0.0003 0.0000 50 0.0003 0.0000 51 0.0003 0.0000 52 0.0003 0.0000 53 0.0003 0.0000 Final_Tahoma Golf Course 8/3/2021 5:18:55 PM Page 13 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0008 265 0 0 Pass 0.0013 157 0 0 Pass 0.0017 108 0 0 Pass 0.0021 77 0 0 Pass 0.0025 65 0 0 Pass 0.0030 58 0 0 Pass 0.0034 43 0 0 Pass 0.0038 38 0 0 Pass 0.0043 31 0 0 Pass 0.0047 27 0 0 Pass 0.0051 24 0 0 Pass 0.0056 23 0 0 Pass 0.0060 18 0 0 Pass 0.0064 16 0 0 Pass 0.0069 14 0 0 Pass 0.0073 13 0 0 Pass 0.0077 11 0 0 Pass 0.0082 10 0 0 Pass 0.0086 9 0 0 Pass 0.0090 8 0 0 Pass 0.0094 8 0 0 Pass 0.0099 7 0 0 Pass 0.0103 7 0 0 Pass 0.0107 7 0 0 Pass 0.0112 6 0 0 Pass 0.0116 6 0 0 Pass 0.0120 6 0 0 Pass 0.0125 6 0 0 Pass 0.0129 6 0 0 Pass 0.0133 6 0 0 Pass 0.0138 6 0 0 Pass 0.0142 5 0 0 Pass 0.0146 5 0 0 Pass 0.0151 5 0 0 Pass 0.0155 5 0 0 Pass 0.0159 5 0 0 Pass 0.0163 5 0 0 Pass 0.0168 5 0 0 Pass 0.0172 4 0 0 Pass 0.0176 4 0 0 Pass 0.0181 4 0 0 Pass 0.0185 4 0 0 Pass 0.0189 4 0 0 Pass 0.0194 3 0 0 Pass 0.0198 3 0 0 Pass 0.0202 3 0 0 Pass 0.0207 3 0 0 Pass 0.0211 3 0 0 Pass 0.0215 3 0 0 Pass 0.0220 3 0 0 Pass 0.0224 3 0 0 Pass 0.0228 3 0 0 Pass 0.0232 3 0 0 Pass Final_Tahoma Golf Course 8/3/2021 5:18:55 PM Page 14 0.0237 3 0 0 Pass 0.0241 3 0 0 Pass 0.0245 3 0 0 Pass 0.0250 3 0 0 Pass 0.0254 3 0 0 Pass 0.0258 3 0 0 Pass 0.0263 3 0 0 Pass 0.0267 3 0 0 Pass 0.0271 3 0 0 Pass 0.0276 3 0 0 Pass 0.0280 2 0 0 Pass 0.0284 2 0 0 Pass 0.0289 2 0 0 Pass 0.0293 2 0 0 Pass 0.0297 2 0 0 Pass 0.0301 2 0 0 Pass 0.0306 2 0 0 Pass 0.0310 2 0 0 Pass 0.0314 2 0 0 Pass 0.0319 2 0 0 Pass 0.0323 2 0 0 Pass 0.0327 2 0 0 Pass 0.0332 2 0 0 Pass 0.0336 1 0 0 Pass 0.0340 1 0 0 Pass 0.0345 1 0 0 Pass 0.0349 1 0 0 Pass 0.0353 1 0 0 Pass 0.0358 1 0 0 Pass 0.0362 1 0 0 Pass 0.0366 1 0 0 Pass 0.0370 1 0 0 Pass 0.0375 1 0 0 Pass 0.0379 1 0 0 Pass 0.0383 1 0 0 Pass 0.0388 1 0 0 Pass 0.0392 1 0 0 Pass 0.0396 1 0 0 Pass 0.0401 1 0 0 Pass 0.0405 1 0 0 Pass 0.0409 1 0 0 Pass 0.0414 1 0 0 Pass 0.0418 1 0 0 Pass 0.0422 1 0 0 Pass 0.0427 1 0 0 Pass 0.0431 1 0 0 Pass 0.0435 1 0 0 Pass Final_Tahoma Golf Course 8/3/2021 5:18:56 PM Page 15 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume: 0.0003 acre-feet On-line facility target flow: 0.0015 cfs. Adjusted for 15 min: 0.0015 cfs. Off-line facility target flow: 0.0006 cfs. Adjusted for 15 min: 0.0006 cfs. Final_Tahoma Golf Course 8/3/2021 5:18:56 PM Page 16 LID Report Final_Tahoma Golf Course 8/3/2021 5:19:33 PM Page 17 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. Final_Tahoma Golf Course 8/3/2021 5:19:33 PM Page 18 Appendix Predeveloped Schematic Final_Tahoma Golf Course 8/3/2021 5:20:20 PM Page 19 Mitigated Schematic Final_Tahoma Golf Course 8/3/2021 5:20:56 PM Page 20 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1955 10 01 END 2008 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 Final_Tahoma Golf Course.wdm MESSU 25 PreFinal_Tahoma Golf Course.MES 27 PreFinal_Tahoma Golf Course.L61 28 PreFinal_Tahoma Golf Course.L62 30 POCFinal_Tahoma Golf Course1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 4 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Existing Conditions MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 4 A/B, Pasture, Flat 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 4 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 4 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Final_Tahoma Golf Course 8/3/2021 5:20:56 PM Page 21 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 4 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 4 0 5 1.5 400 0.05 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 4 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 4 0.15 0.5 0.3 0 0.7 0.4 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 4 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 Final_Tahoma Golf Course 8/3/2021 5:20:56 PM Page 22 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Existing Conditions*** PERLND 4 0.4 COPY 501 12 PERLND 4 0.4 COPY 501 13 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 0.857 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 0.857 IMPLND 1 999 EXTNL PREC Final_Tahoma Golf Course 8/3/2021 5:20:56 PM Page 23 WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 END MASS-LINK END RUN Final_Tahoma Golf Course 8/3/2021 5:20:56 PM Page 24 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1955 10 01 END 2008 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 Final_Tahoma Golf Course.wdm MESSU 25 MitFinal_Tahoma Golf Course.MES 27 MitFinal_Tahoma Golf Course.L61 28 MitFinal_Tahoma Golf Course.L62 30 POCFinal_Tahoma Golf Course1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 7 IMPLND 11 GENER 2 RCHRES 1 RCHRES 2 COPY 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Surface ention Cell MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** 2 24 END OPCODE PARM # # K *** 2 0. END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 7 A/B, Lawn, Flat 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 7 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 25 PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 7 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 7 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 7 0 5 0.8 400 0.05 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 7 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 7 0.1 0.5 0.25 0 0.7 0.25 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 7 0 0 0 0 3 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 11 PARKING/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 11 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 11 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 11 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 11 400 0.01 0.1 0.1 Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 26 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 11 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 11 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Developed Conditions*** PERLND 7 0.22 RCHRES 1 2 PERLND 7 0.22 RCHRES 1 3 IMPLND 11 0.18 RCHRES 1 5 ******Routing****** PERLND 7 0.22 COPY 1 12 IMPLND 11 0.18 COPY 1 15 PERLND 7 0.22 COPY 1 13 RCHRES 1 1 RCHRES 2 8 RCHRES 2 1 COPY 501 17 RCHRES 1 1 COPY 501 17 END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 GENER 2 OUTPUT TIMSER .0011111 RCHRES 1 EXTNL OUTDGT 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** 1 Surface ention -006 3 1 1 1 28 0 1 2 Bioretention Ce-005 2 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 2 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO HYDR-PARM1 Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 27 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** 1 0 1 0 0 4 5 6 0 0 0 1 0 0 0 2 1 2 2 2 2 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** 1 1 0.01 0.0 0.0 0.0 0.0 2 2 0.01 0.0 0.0 0.5 0.0 END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 5.0 6.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS *** User-Defined Variable Quantity Lines *** addr *** <------> *** kwd varnam optyp opn vari s1 s2 s3 tp multiply lc ls ac as agfn *** <****> <----> <----> <-> <----><-><-><-><-><--------> <><-> <><-> <--> *** UVQUAN vol2 RCHRES 2 VOL 4 UVQUAN v2m2 GLOBAL WORKSP 1 3 UVQUAN vpo2 GLOBAL WORKSP 2 3 UVQUAN v2d2 GENER 2 K 1 3 *** User-Defined Target Variable Names *** addr or addr or *** <------> <------> *** kwd varnam ct vari s1 s2 s3 frac oper vari s1 s2 s3 frac oper <****> <----><-> <----><-><-><-> <---> <--> <----><-><-><-> <---> <--> UVNAME v2m2 1 WORKSP 1 1.0 QUAN UVNAME vpo2 1 WORKSP 2 1.0 QUAN UVNAME v2d2 1 K 1 1.0 QUAN *** opt foplop dcdts yr mo dy hr mn d t vnam s1 s2 s3 ac quantity tc ts rp <****><-><--><><-><--> <> <> <> <><><> <----><-><-><-><-><--------> <> <-><-> GENER 2 v2m2 = 437.46 *** Compute remaining available pore space GENER 2 vpo2 = v2m2 GENER 2 vpo2 -= vol2 *** Check to see if VPORA goes negative; if so set VPORA = 0.0 IF (vpo2 < 0.0) THEN GENER 2 vpo2 = 0.0 END IF *** Infiltration volume GENER 2 v2d2 = vpo2 END SPEC-ACTIONS FTABLES FTABLE 2 72 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.020173 0.000000 0.000000 0.000000 0.024725 0.019999 0.000039 0.000000 0.000000 0.049451 0.019775 0.000079 0.000000 0.000000 0.074176 0.019553 0.000119 0.000000 0.000021 0.098901 0.019331 0.000161 0.000000 0.000050 0.123626 0.019111 0.000203 0.000000 0.000095 0.148352 0.018891 0.000246 0.000000 0.000162 0.173077 0.018673 0.000290 0.000000 0.000252 0.197802 0.018456 0.000336 0.000000 0.000371 0.222527 0.018239 0.000382 0.000000 0.000520 Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 28 0.247253 0.018024 0.000428 0.000000 0.000554 0.271978 0.017809 0.000470 0.000000 0.000718 0.296703 0.017596 0.000513 0.000000 0.000944 0.321429 0.017384 0.000556 0.000000 0.001213 0.346154 0.017172 0.000601 0.000000 0.001528 0.370879 0.016962 0.000646 0.000000 0.001893 0.395604 0.016753 0.000692 0.000000 0.002312 0.420330 0.016544 0.000739 0.000000 0.002525 0.445055 0.016337 0.000786 0.000000 0.002838 0.469780 0.016131 0.000835 0.000000 0.003385 0.494505 0.015925 0.000884 0.000000 0.003999 0.519231 0.015721 0.000934 0.000000 0.004685 0.543956 0.015518 0.000985 0.000000 0.005445 0.568681 0.015316 0.001037 0.000000 0.006286 0.593407 0.015114 0.001090 0.000000 0.007067 0.618132 0.014914 0.001144 0.000000 0.007330 0.642857 0.014715 0.001198 0.000000 0.008359 0.667582 0.014517 0.001254 0.000000 0.009483 0.692308 0.014319 0.001310 0.000000 0.010706 0.717033 0.014123 0.001424 0.000000 0.012035 0.741758 0.013928 0.001541 0.000000 0.013473 0.766484 0.013734 0.001659 0.000000 0.015025 0.791209 0.013541 0.001779 0.000000 0.015724 0.815934 0.013349 0.001900 0.000000 0.016953 0.840659 0.013157 0.002024 0.000000 0.018775 0.865385 0.012967 0.002149 0.000000 0.020730 0.890110 0.012778 0.002277 0.000000 0.022823 0.914835 0.012590 0.002406 0.000000 0.025060 0.939560 0.012403 0.002537 0.000000 0.027445 0.964286 0.012217 0.002670 0.000000 0.029696 0.989011 0.012032 0.002805 0.000000 0.030413 1.013736 0.011848 0.002942 0.000000 0.033150 1.038462 0.011665 0.003080 0.000000 0.036055 1.063187 0.011482 0.003221 0.000000 0.039135 1.087912 0.011301 0.003364 0.000000 0.042396 1.112637 0.011121 0.003508 0.000000 0.045845 1.137363 0.010942 0.003655 0.000000 0.049489 1.162088 0.010764 0.003803 0.000000 0.051493 1.186813 0.010587 0.003954 0.000000 0.054043 1.211538 0.010411 0.004106 0.000000 0.058143 1.236264 0.010236 0.004261 0.000000 0.062460 1.260989 0.010062 0.004417 0.000000 0.067000 1.285714 0.009889 0.004576 0.000000 0.071770 1.310440 0.009718 0.004736 0.000000 0.076778 1.335165 0.009547 0.004899 0.000000 0.082012 1.359890 0.009377 0.005063 0.000000 0.083064 1.384615 0.009208 0.005230 0.000000 0.085517 1.409341 0.009040 0.005399 0.000000 0.086577 1.434066 0.008873 0.005570 0.000000 0.087643 1.458791 0.008707 0.005743 0.000000 0.088713 1.483516 0.008542 0.005918 0.000000 0.089789 1.508242 0.008378 0.006095 0.000000 0.090870 1.532967 0.008215 0.006274 0.000000 0.091956 1.557692 0.008054 0.006456 0.000000 0.093047 1.582418 0.007893 0.006639 0.000000 0.094143 1.607143 0.007733 0.006825 0.000000 0.095245 1.631868 0.007574 0.007013 0.000000 0.096351 1.656593 0.007416 0.007203 0.000000 0.097462 1.681319 0.007260 0.007396 0.000000 0.098579 1.706044 0.007104 0.007590 0.000000 0.099701 1.730769 0.006949 0.007787 0.000000 0.100827 1.750000 0.006795 0.010043 0.000000 0.101707 END FTABLE 2 FTABLE 1 22 6 Depth Area Volume Outflow1 Outflow2 outflow 3 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.006795 0.000000 0.000000 0.000000 0.001136 Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 29 0.024725 0.020399 0.000502 0.000000 0.075195 0.001136 0.049451 0.020625 0.001009 0.000000 0.076243 0.002277 0.074176 0.020852 0.001522 0.000000 0.077290 0.003423 0.098901 0.021081 0.002040 0.000000 0.078338 0.004574 0.123626 0.021310 0.002564 0.000000 0.079386 0.005730 0.148352 0.021540 0.003094 0.000000 0.080433 0.006891 0.173077 0.021772 0.003629 0.000000 0.081481 0.008058 0.197802 0.022004 0.004170 0.000000 0.082528 0.009229 0.222527 0.022237 0.004717 0.000000 0.083576 0.010406 0.247253 0.022472 0.005270 0.000000 0.084624 0.011587 0.271978 0.022707 0.005829 0.000000 0.085671 0.012774 0.296703 0.022943 0.006393 0.000000 0.086719 0.013966 0.321429 0.023181 0.006963 0.000000 0.087766 0.015163 0.346154 0.023419 0.007539 0.000000 0.088814 0.016365 0.370879 0.023659 0.008121 0.000000 0.089862 0.017572 0.395604 0.023899 0.008709 0.000000 0.090909 0.018784 0.420330 0.024141 0.009303 0.000000 0.091957 0.020001 0.445055 0.024383 0.009903 0.000000 0.093005 0.021224 0.469780 0.024626 0.010509 0.000000 0.094052 0.022451 0.494505 0.024871 0.011121 0.041245 0.095100 0.023684 0.500000 0.024925 0.011258 0.041245 0.095333 0.023958 END FTABLE 1 END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 0.857 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 0.857 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP WDM 2 PREC ENGL 0.857 RCHRES 1 EXTNL PREC WDM 1 EVAP ENGL 0.5 RCHRES 1 EXTNL POTEV WDM 1 EVAP ENGL 0.76 RCHRES 2 EXTNL POTEV END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** RCHRES 2 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 2 HYDR O 1 1 1 WDM 1001 FLOW ENGL REPL RCHRES 2 HYDR O 2 1 1 WDM 1002 FLOW ENGL REPL RCHRES 2 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1004 STAG ENGL REPL RCHRES 1 HYDR O 1 1 1 WDM 1005 FLOW ENGL REPL COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 2 PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 2 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 8 RCHRES OFLOW OVOL 2 RCHRES INFLOW IVOL END MASS-LINK 8 MASS-LINK 12 Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 30 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 17 RCHRES OFLOW OVOL 1 COPY INPUT MEAN END MASS-LINK 17 END MASS-LINK END RUN Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 31 Predeveloped HSPF Message File Final_Tahoma Golf Course 8/3/2021 5:20:57 PM Page 32 Mitigated HSPF Message File Final_Tahoma Golf Course 8/3/2021 5:20:58 PM Page 33 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. 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 use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2021; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com DEA Job No. TGCC0000-0001 Page 12 August 6, 2021 7.5 2019 DOE MANUAL MINIMUM REQUIREMENT FLOWCHART Does the Project result in 2,000 square feet, or more, of new plus replaced hard surface area? OR Does the land disturbing activity total 7,000 square feet or greater? IF Yes No Minimum Requirements #1 through #5 IF apply to the new and replaced hard Minimum Requirement #2 applies. surfaces and the land disturbed. Next Question Does the Project add 5,000 square feet or more of new hard surfaces? OR Convert 3/4 acres or more of vegetation to lawn or landscaped areas? OR Convert 2.5 acres or more of native vegetation to pasture? Yes IF No All Minimum Requirements apply Next Question Is this a road to the new hard surfaces and the No related project? No converted vegetation areas. Yes Does the Project add 5,000 square feet or more of new hard surfaces? YesNO IF Is the total of new plus replaced hard surfaces 5,000 square feet or more, Do the new hard IF AND surfaces add 50% ordoes No No additional No the value of the proposed improvements - including interior improvements - exceed 50% of the more to the existing requirements. hard surfaces within assessed value (or replacement value) of the: the Site? • existing Project Site improvements (for commercial or industrial projects) OR • existing Site improvements (for all other projects) Yes" All Minimum Requirements apply to the new and replaced 4__J Yes hard surfaces and converted vegetation areas. Flow Chart for Determining Requirements for Redevelopment DEPARTMENT OF Revised March 2019 ECOLOGYPlease see http.//www.ecy.wa.gov/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 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