Conceptual Drainage Report
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CONCEPTUAL DRAINAGE REPORT
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NAPA AC~-TO EXPANSION
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SEPTEMBER 4.200
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CONCEPTUAL DRAINAGE REPORT
FOR
NAPA AUTO EXPANSION
A part of Section 19, Township 17 North, Range 2 East of the Willamette Meridian
City of Yelm, Thurston County, Washington
Prepared for:
Mr. Mike Metcalf
Lipke, Metcalf, Roush -r
P.O. Box 743 '~
Spanaway, Washington 98387 <~
(253) 312-6860 ~ -.~
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Prepared by:
Apex Engineering PLLC
2601 South 35th, Suite 200
Tacoma, Washington 98409
(253) 473-4494
File #28604/2
September 4, 2003
D~
Project Manager/Engineer:
pex
"I hereby state that this Conceptual Drainage Report for Napa Auto Expansion has been prepared
by me or under my supervision and meets the standard of care and expertise which is usual and
customary in this community for professional engineers. I understand that the City of Yelm does
not and will not assume liability for the sufficiency, suitability, or performance of drainage
facilities prepared by me."
p9ex
TABLE OF CONTENTS
Page
Section I
Section II
Section III
Section IV
Section V
Section VI
Section VII
Section VIII
Section IX
Section X
Project Overview ..................................................
Plot Plan ................................................................
Preliminary Conditions Summary .......................
Off-Site Analysis ..................................................
Analysis and Design .........................................................
Special Reports and Studies .............................................
Basin and Community Planning Areas ............................
Other Permits ....................................................................
Erosion and Sediment Control Plan .................................
Maintenance and Operations Manual ..............................
............................................................. l
............................................................. l
.......................................1
.......................................1
.......................................1
.......................................2
.......................................2
.......................................2
.......................................3
Appendices:
Appendix A
Appendix B
Appendix C
Drainage Calculations
Maintenance
Preliminary Conditions
P9e~x
SECTION I -PROJECT OVERVIEW
The Napa Auto Expansion project consists of an existing 4,200± square foot building with
associated parking. The project proposes a 2,000-square-foot expansion of the gbuilding along with
associated parking. The project is located at the southwest corner of the intersection of Yelm
Avenue and Clark Road South. The project is approximately 39,000 square feet in size. The site is
located within a portion of Section 19, Township 17 North, Range 2 East, Willamette Meridian,
within the City of Yelm, Thurston County, Washington.
Access to the site is provided by two existing access points, one from Yelm Avenue and one from
Clark Road South. The site will be served by a private onsite storm system and by City of Yelm
water and sewer. The storm system will be designed to meet the City of Yelm Development
Guidelines and the Best Management Practices (BMPs) recommended in the Department of Ecology
Storm Water Management Manual for the Puget Sound Basin. The storm design will include a
biofiltration Swale and an infiltration trench. The biofiltration Swale will be sized for the 6-
month/24-hour design storm event with the capacity to handle the 100-year/24-hour design storm
event. The infiltration trench will be sized to handle the 100-year/24-hour design storm event. If the
proposed pollution generating impervious surface area is less than 5,000 square feet, a biofiltration
swale will not be required.
SECTION II -- PLOT PLAN
Construction drawings for the proposed development and drainage system will be prepared as
part of the overall stormwater site plan at a later date. Please refer to the exhibit maps for the
conceptual utility layouts.
SECTION III -PRELIMINARY CONDITIONS SUMMARY
The project site is located within the commercial zone of the City of Yelm and is a permitted use.
Therefore, the site is being developed in accordance with the City of Yelm's Development
Guidelines. Refer to Appendix C for the pre-application meeting notes for the proposed project.
SECTION IV -OFF-SITE ANALYSIS
Since stormwater runoff for the 100-year/24-hour design storm will be infiltrated on site, no
runoff is expected to leave the site. In addition, runoff appears to flow onto the site. Yelm
Avenue intercepts any flows which may come from the south. Clark Road South intercepts
drainage from the east.
SECTION V -ANALYSIS AND DESIGN
Existin Sg ite Hydrology
The site is currently developed with an existing building and associated parking lot. Drainage
from the site currently infiltrates into the native coarse sands and gravel. Any runoff which
would leave the site would flow to the south.
1 pex
The on-site soils are rhostly gravelly coarse sand with cobbles typically classified within
hydrologic soil group Type A. The on-site soils are suitable for infiltration. Soil logs will be
dug at a later date.
The precipitation used to model the site has been taken from isopluvials of the DOE Stormwater
Management Manual.
Developed Site Hydrology
The proposed drainage concept meets the D.O.E. Manual. The D.O.E. Manual states that all
infiltration (and filtration) BMPs must be preceded by pretreatment such as a bioswale or
sediment tank. Treatment for this project will be provided by a biofiltration swale preceding the
infiltration facility. The swale will be sized for bioswale function for the 6-month/24-hour
storm, and for capacity for the 100-year/24-hour storm. The infiltration trench will be designed
fora 100-year/24-hour storm.
The drainage calculations are provided in Appendix B. As can be seen from the required storage
and the outflow hydrographs, the proposed system is adequate.
STEP System Design
The sanitary STEP system has been designed in accordance with the City of Yelm requirements
and the guidelines contained in the Orenco Systems Catalog. The estimated flow from the
proposed building is based on the EPA Design Manual for a shopping center. The EPA Design
Manual estimates the wastewater flow at 2.1 gpd/parking space. The STEP tank was sized using
the City of Yelm Development Guideline for flows less than 1,500 gpd. It was calculated that a
3,000-gallon, 2-compartment tank with a duplex pumping system will be appropriate for the site
(see Appendix C).
SECTION VI -SPECIAL REPORTS AND STUDIES
A Geotechnical analysis of the site will be prepared for the final design of the project. No other
special reports or studies are known to have been prepared for the site.
SECTION VII -BASIN AND COMMUNITY PLANNING AREAS
The site in not known to be located within any special basin or community planning area. Storm
water discharge from the site is to the ground and is designed in accordance with BMPs of the
Department of Ecology Storm Water Management Manual for the Puget Sound Basin.
SECTION VIII -OTHER PERMITS
The proposed development will require building and site development permits issued from the
City of Yelm. The City of Yelm will be the lead agency in all application processes for the
proposed development. No other special permits are anticipated for the development of the site.
2 P9e~x
SECTION IX -EROSION AND SEDIMENT CONTROL PLAN
Little or no erosion is anticipated for and during construction of the proposed development.
However, the storm drainage and grading plans will incorporate the following erosion control
BMPs:
1. Stabilize Construction Entrance - A gravel construction driveway will be placed at the
entrance off of Clark Road South. The construction entrance should limit the amount of mud
and sediment transported onto public roadways.
2. Catch Basin (CB) Sediment Barrier -Filter Fabric inlet barriers will be placed at all CBs to
limit the amount of sediment being carried into the infiltration systems.
3. Filter Fabric Fence -Filter fabric fence will be placed along the downstream perimeters to
protect adjacent property owners. Fence lengths and locations will be shown on the
construction drawings.
SECTION X -MAINTENANCE AND OPERATIONS MANUAL
Maintenance will be required for the storm facilities to perform as intended. Maintenance of the
on-site infiltration and filtration facilities will be provided by the project proponent. Appendix B
identifies some maintenance guidelines for the conveyance system and infiltration systems. The
maintenance guidelines were obtained from the King County Surface Water Design Manual and
will be given to the project proponent to ensure maintenance of the proposed storm system.
U28604/docs-rpts/rpts~ps090403
3 pex
APPENDIX A
DRAINAGE CALCULATIONS
FIGURE E.4
Isopluvials of 100 Year, 24-Hour precipitation in Tenths ofi an Inch
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9/3/03 9:36:8 am Apex Engineering PLLC page 1
NAPA AUTO PARTS
PRELIMINARY INFILTRATION CALCULATIONS
GPS
BASIN SUMMARY
BASIN ID: DEV100
SBUH METHODOLOGY
TOTAL AREA.......:
RAINFALL TYPE....:
PRECIPITATION....:
TIME INTERVAL....:
NAME: DEV SITE 100YR
0.89 Acres BASEFLOWS
TYPElA
5.00 inches AREA..:
10.00 min CN.....
TC.....
0.00 cfs
PERV
0.00 Acres
0.00
0.00 min
IMP
0.89 Acres
98.00
5.00 min
ABSTRACTION COEFF: 0.20
PEAK RATE: 0.93 cfs VOL: 0.35 Ac-ft TIME: 480 min
9/3/03 9:36:8 am Apex Engineering PLLC page 2
NAPA AUTO PARTS
PRELIMINARY INFILTRATION CALCULATIONS
GPS _
STAGE STORAGE TABLE
RECTANGULAR VAULT ID No. INFIL
Description: INFIL TRENCH
Length: 185.00 ft. Width: 5.00 ft. voids: 0.300
STAGE <----STORAGE---->
(ft) ---cf--- --Ac-Ft-
100.00 0.0000 0.0000
100.10 27.750 0.0006
100.20 55.500 0.0013
100.30 83.250 0.0019
100.40 111.00 0.0025
100.50 138.75 0.0032
100.60 166.50 0.0038
100.70 194.25 0.0045
100.80 222.00 0.0051
100.90 249.75 0.0057
101.00 277.50 0.0064
STAGE <----STORAGE---->
(ft) ---cf--- --Ac-Ft-
-----------------------
101.10 305.25 0.0070
101.20 333.00 0.0076
101.30 360.75 0.0083
101.40 388.50 0.0089
101.50 416.25 0.0096
101.60 444.00 0.0102
101.70 471.75 0.0108
101.80 499.50 0.0115
101.90 527.25 0.0121
102.00 555.00 0.0127
102.10 582.75 0.0134
STAGE <----STORAGE---->
(ft) ---cf--- --AC-Ft-
-----------------------
102.20 610.50 0.0140
102.30 638.25 0.0147
102.40 666.00 0.0153
102.50 693.75 0.0159
102.60 721.50 0.0166
102.70 749.25 0.0172
102.80 777.00 0.0178
102.90 804.75 0.0185
103.00 832.50 0.0191
103.10 860.25 0.0197
103.20 868.00 0.0204
STAGE <----STORAGE---->
(ft) ---cf--- --Ac-Ft-
-----------------------
-----------------------
103.30 915.75 0.0210
103.40 943.50 0.0217
103.50 971.25 0.0223
103.60 999.00 0.0229
103.70 1027 0.0236
103.80 1054 0.0242
103.90 1082 0.0248
104.00 1110 0.0255
104.00 1110 0.0255
9/3/03 9:36:8 am Apex Engineering PLLC page 3
NAPA AUTO PARTS
PRELIMINARY INFILTRATION CALCULATIONS
GPS _
STAGE DISCHARGE TABLE
DISCHARGE LIST ID No. INFILOUT
Description: 185*5
STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE--->
(ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- ------- (ft) ---cfs-- -------
100 .00 0.4280 101 .10 0.4280 102 .20 0.4280 103. 30 0.4280
100. 10 0.4280 101 .20 0.4280 102 .30 0.4280 103. 40 0.4280
100. 20 0.4280 101 .30 0.4280 102 .40 0.4280 103. 50 0.4280
100. 30 0.4280 101 .40 0.4280 102 .50 0.4280 103. 60 0.4280
100. 40 0.4280 101 .50 0.4280 102 .60 0.4280 103. 70 0.4280
100. 50 0.4280 101 .60 0.4280 102 .70 0.4280 103. 80 0.4280
100. 60 0.4280 101 .70 0.4280 102 .80 0.4280 103. 90 0.4280
100. 70 0.4280 101 .80 0.4280 102 .90 0.4280 104. 00 0.4280
100. 80 0.4280 101 .90 0.4280 103. 00 0.4280 104. 00 0.4280
100. 90 0.4280 102 .00 0.4280 103. 10 0.4280
101. 00 0.4280 102. 10 0.4280 103. 20 0.4280
9/3/03 9:36:9 am Apex Engineering PLLC page 4
NAPA AUTO PARTS
PRELIMINARY INFILTRATION CALCULATIONS
GPS ,
LEVEL POOL TABLE SUMMARY
MATCH INFLOW -STO- -DIS- <-PEAK-> OUTFLOW STORAGE
<--------DESCRIPTION---------> (cfs) (cfs) --id- --id- <-STAGE> id (cfs) VOL (cf)
DEV100 ....................... 0.00 0.93 INFIL INFILOUT 103.89 10 0.43 1078.31 cf
FIGURE E.1
E-9
Isopluvials of 2-Year, 24-Hour Precipitation in Tenths of an Inch
9/3/03 9:36:32 am Apex Engineering PLLC page 1
NAPA AUTO PARTS
PRELIMINARY BIOSWALE CALCULATIONS
GPS
BASIN SUMMARY
BASIN ID: DEV100 NAME: DEV SITE 100YR
SBUH METHODOLOGY
TOTAL AREA.......: 0.89 Acres BASEFLOWS: 0.00 cfs
RAINFALL TYPE....: TYPElA PERV IMP
PRECIPITATION....: 5.00 inches AREA..: 0.00 Acres 0.89 Acres
TIME INTERVAL....: 10.00 min CN....: 0.00 98.00
TC..... 0.00 min 5.00 min
ABSTRACTION COEFF: 0.20
PEAK RATE: 0.93 cfs VOL: 0.35 Ac-ft TIME: 480 min
BASIN ID: DEVWQ NAME: DEV SITE 6 MONTH/24 HR
SBUH METHODOLOGY
TOTAL AREA.......: 0.89 Acres BASEFLOWS: 0.00 cfs
RAINFALL TYPE....: TYPElA PERV IMP
PRECIPITATION....: 1.67 inches AREA..: 0.00 Acres 0.89 Acres
TIME INTERVAL....: 10.00 min CN....: 0.00 98.00
TC..... 0.00 min 5.00 min
ABSTRACTION COEFF: 0.20
PEAK RATE: 0.30 cfs VOL: 0.11 Ac-ft TIME: 480 min
w
u
c
~A
W
Tine in Hvurs
Hyd No..
Hyd No..
DEV100
Rate: 0.93 cfs Time: 8.00 hr
Vol 0.35 Ac-ft Int: 10.00 min
DEVWQ
Rate: 0.30 cfs Time: 8.00 hr
Vol 0.11 Ac-ft Int: 10.00 min
APPENDIX B
MAINTENANCE
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 2 - INFILTRATION
Maintenance Conditions When Maintenance Rasufts Expected When
Component Defect b Needed Maintenance !s Performed
General Trash & Debris See 'Ponds' Standard No. 1 See 'Ponds' Standard No. 1
Poisonous See 'Ponds' Standard No. 1 Sae 'Ponds' Standard No. 1
Vegetation
Pollution See "Ponds" Standard No. 1 See 'Ponds' Standard No. 1
Unmowed Grass/ Sae 'Ponds' Standard No. t See 'Ponds' Standard No. T
Ground Cover
Rodent Holes See 'Ponds' Standard No. 1 Sae 'Ponds' Standard No. 1
Insects See 'Ponds' Standard No. 1 See 'Ponds' Standard Na. 1
Storage Area Sediment A percolation test pit or test of faciiir/ Sediment is removed and/or
indicates facility is only working at 90°.6 of its facility is cleaned so that
designed capabilities. If two inches or more infiltration system works
sediment is present, remove. according to design.
Sheet Cover (If Sheet cover is visible and has more !hat three Sheet cover repaired or replaced.
Applicable) 1/flinch holes in it.
Sump Filled with Any Sediment and debris filling vault to 1C°6 Clean out sump to design depth.
Sedmiment and of depth from sump bottom to bottom of
Debris (If Applicable) outlet pipe or obstructing flow into the
connector pipe.
Flter Bags Felted with Sediment and debris fill bap more than 1 /2 Replace filter bag or redesign
Sedmiment and full. system.
Debris
Rock Flters Sediment end Debris By visual inspection, little or no water flows Replace gravel in rock filter.
through filter during heavy rain storms.
Side Slopes of Erosion See 'Ponds' Standard No. 1 See 'Ponds' Standard No. 1
Pond
Emergency Rack Mieaing See 'Ponds' Standard No. 1
Overflow Spillway
Settling Ponds and Sediment Remove when 5' or more.
Vaults
Note: Sediment accumulation of more than .25 inches per year may indicate excessive erosion is occurring upstream of the facility or
that conveyance systems are not being properly maintained. The contributing drainage area should be checked for erosion problems
or inadequate maintenance of conveyance systems if excessive sedimentation is noted in an infiltration facility.
Check twice a year during first 2 years of operation; once a year thereafter. Clean manholeslcatch basins, repair damaged
inlets/outlets, clean trash racks.
A-2 11/94
~~
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 5 -CATCH BASINS
AAalatenanee Conditions When Maintenance Results Expected
Compoaeat Defect Is Needed Whoa Maintenance la Performed
General Trash 8~ Cebris Trash or debris of .mcra than 1/2 cubic No trash or debris located immediately !n
(Includes foot which is !coated immediately in front front of catch basin opening.
Sediment) of the catch basin opening or is blocking
capacity cf basin~.y mcra :hen 70%.
Trash or debris (n :ha basin) that No trash or debris in the catch basin.
exceeds 1/3 the depth from ate bottom
of basin to invert of ~e lowest pure into
cr out of :he basin.
Trash cr debris .n ary inlet or outlet pipe Inlet and outlet pipes free of :rash cr
blocking mare :hen t; 3 of ;ts height. debris.
Dead animals or vegetation that could Na dead animals or vegetation present
generate odors the; would cause within the catch ~asin.
complaints or danyercus gases ~a.g..
methane).
Decosits of ;arbaGe exceeding 1 cubic fVo condition present which would atyar.
foot in volume. or support the breeding of inseCS or
rodents.
Structural Damage G;rner of frame extends mcra than 3/4 Frame is even with curb.
to Frame and/or inch past curb !ace nto :he street pf
Top Slab applicable).
Top slab has holes 'anger than 2 square Top slab is tree of holes and uacks.
inches or uacks wider ;hen 1/4 inch
Qntent is tc make sure aU material is
running into the basin).
Frame not sitting flush on tap slab, i.e., Frame is sitting flush on top slab.
separation of more than 3/4 inch of the
frame from the :CD SIdD.
Cracks in Basin Cracks wider than 1/2 inch and longer Basin rop~aced or repaired t0 design
Walls/Botlom than 3 feat, any evidence of soil particles standards.
entering catch basin tftrough uacks, or
maintenance person judges that strvCUre
is unsound.
Cracks wider than t/2 inch and longer fVo cracks more than 1/4 inch wide at 7:e
than 1 foot at the ;cint of any inlet/outlet joint of inlet/outlet pipe.
pipe or any evidence of soil particles
entering catch basin Vtrough cracks.
Settlement/ Basin has settled more than 1 inch or has Basin replaced or repaired to design
Misalignment rotated more than 2 nches out of standards.
alignment.
Fire Hazard Presence of chemicals such as natural No flammable chemicals present
gas, ail, and gasoline.
Vegetation Vegetation growing across and blocking No vegetation blocking opening to basin.
more than 10'6 of the basin opening.
Vegetation growing in inlet/outlet pipe No vegetation or root growth present
joints that is more than six inches tall and
less than six inches apart.
Pollution Nontlammabte chemicals of more than No pollution present other than surface
1/2 cubic foot per three feet of basin film.
length.
. ~ 190
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 5 -CATCH BASINS (Continued)
Malntenanu Condltlona When tiAa&rtenanee Resutb Expected
Component Defoe! b Needed When pAalntenanee Ia Performed
Catch Basin Cover Cover Not in Place
Locking
Mechanism Not
Working
Ladder
Metal Grates
(f applicable)
Cover Difficult to
Remove
ladder Rungs
Unsafe
Cover to mfssinq or only partially in place.
Any open catch basin requires
maintenance.
Mechanism annot be opened by one
maintenance person with proper tools.
Boles into frame have less than 1/2 inch
of thread.
One maintenance person cannot remove
lid after applying 80 ibs. of lift" intent is
keep cover from sealing off access to
maintenance.
Ladder is unsafe due to missing rungs,
misalignment, rust, eracics, or sharp
edges.
Grate with opening wider than 7/8 inch.
Trash and Debris Trash and debris that is blocking mcre
than 2096 of grate surface.
Camaged or Grate missing or broken member(s) of
Missing the grate.
Catch basin cover is closed.
Mechanism opens with proper tools.
Cover can be removed 5y one
maintenance person.
ladder meets design standards and
alicvvs maintenance person safe access.
Grata openings meat design standards.
Grate free of trash and debris.
Grate is in place and meets design
standards.
A-6 I/90 /1
7J
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 6 -DEBRIS BARRfERS (e.g. Trash Raclcs)
Malr>tenanee condltlona When Malrrtenanee Results EYpeebed
Componeet DetfecY b Needed When Malntenanee 1s Performed
General Trash and Debris Trash or debris that is plugging more Barrier Gsar to receive capacity flaw.
than 21796 of the openings in the barrier.
Metal Camaged/ Missing Bars are gent out of shape more than 3
gars inches.
Bars an missing or srttlro barrier is
missing.
Bars are loose and rust is causing 50%
deterioration to any part of barrier.
Bars in plats with no bends mcre titan
3/4 inch.
Bars in place axording to design.
Repair or replace barrier to dasi5n
standards.
a-~ I~0
~~
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 7 -ENERGY DISSIPATORS
Maintenana CondWona Whsn Maintenana Rswlte Expected
Component Defect Ie Heeded When Maintenance la Performed
External:
Rack Pad Missing or Moved Only one Iaysr of rock exists above native Replace racks to design standard.
Rock soil in aroa five square feet or larger, or
any exposure of native soil.
Cispersion Trench
ntemal•
Manhole/Chamber
Plpe Plugged with
Sediment
tVct Cischarging
Water Property
Perforations
Plugged
Water Flows Out
Tcp of 'Distributor
Catch Basin
Receiving Area
Over-Saturated
Worn a Damaged
Posts, Baffles,
Sides of Chamber
Other Defects
Accumulated sediment that exceeds 2C% Pipe cleaned/flushed so that it matches
of tits design depth. design.
Visual evidence of water discharging at
concentrated points along Vench (normal
condition is a 'sheet flcw' of water slcng
trench). Infant ;s to prevent erasicn
damage.
G1~er 1/2 of perforations in pipe are
plugged with debris and sediment.
Maintenance person observes water
flowing out during any storm less trtan
the design storm or it is rousing or
appears likely to cause damage.
Water in receiving area is causing or has
potential of causing landslide problems.
Trench must be redesigned or rebuilt :o
standard.
Dean or replace perfcrated pipe.
Faality must be rabuiR or redesigned b
standards.
CVo danger of landslides.
Structure dissipating flow deteriorates to
t/2 or original size or any concentrated
room spot exceeding one square foot
which would make structure unsound.
See 'Catch Basins' Standard No. 5
Fbeplacs structure to design standards.
See 'Catch Basins' Standard No. 5
- A-8 1/90
~n
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 8 -FENCING
F,~,lr,~,ar,« Cor+dftlons wh«+ M.,naeanc. Resuka E~.etd
Compo~Mt Defect Is Needed When Malntsean~e Is Pertortned
General Missing or Broken Any defect in the fence that permits easy Parts in place to provide adequate
p~ entry to a facility. securityr.
Erosion
Wire Fences Damaged Pam
Detettorated Paint
or Protscsive
Coating
Openings in Fabric
Part broken or missing.
Erosion more than 4 inches high and 12-
18 inches wide permitting an opening
under a !ence.
Posts out of plumb more than 8 inches.
Top rails bent more than 5 inches.
Any part cf fence Including posts, top
rails, and fabric) more than 1 foot out of
design alignment.
Missing or loose tensicn wire.
Missing or loose barbed wire that is
sagging mare than 2-1/2 inches between
posts.
Extension arm missing, broken, or bent
out of shape mare than 1-1/2 inches.
Part or parts that have a rusting or scaling
conditicn that has affected structural
adequacy.
Openings in fabric are such that an &
inch-diameter ball could fit through.
Broken ar missing parts replaced.
No opening under the fence that exceeds
4 inches in height.
Posts plumb to within 1-1/Z inches.
Tcp rail free of bends greater than 1 inc^.
Fence is aligned and meeri design
standards.
7ensicn wire in plats and hciding fabric.
Barged wire in place with lass than 3j=-
inch sag between pasts.
Extensicn arm in place with no bends
larger than 3/4 inch.
SwC.urally adequate posts or parts with
a uniform protective coating.
No openings in fabric.
_ A 9 190
9;f
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
"O. 9 -GATES _
Malntenanee Condltloes When 1fAair+oenanee Resuib E>~eeEed
Component Detee! b Needed When Mairrtenana Is Performed
uenerai 17amaged or Mia:ing gate or Ioddng devices. Gates and loddng devices in place.
Missing Members
8rokert or missing hinges such that flats Mnges intact and tubed. Cats is working
cannot be wily opened and dosed by a freely.
malntanana person.
Gate is out of plumb more than 6 inches Gats is aligned and vertical.
and mars titan 1 foot out of design
alignment.
Missing sietcher bar, stretcher bands, Stretcher bar, bands, and ties in place.
and tlss.
t; penings In Fabric See 'Penang' Standard No. 8 See 'Penang' Standard iYo. S
A-10 I/90
~w
KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
NO. 10 -CONVEYANCE SYSTEMS (Pipes & Ditches)
Maintenance CondWona When Malntsnanee Rewtts Expeeled
Component t3efsct Is Needed When Maintenance le Performed
Pipes Sediment ~ Debris Accumulated sediment tat exceeds 20°6 Pipe cleaned of all sediment and debris.
of eta diameter of the pipe.
Vegetation Vegetation that reduces free movement of All vegetation removed so water flows
water through pipes. freely through pipes.
Damaged Protective coating is damaged; rust is P+pe repaired or replaced.
causing more than '~°.6 deterioration to
any part of pipe.
Any dent that decreases the cross section Pipe repaired or replaced.
area of pipe by mcrs than 20°6.
Cpen Etches Trash u Debris Trash and debris exceeds 1 cubic toot Trash and debris cleared frcm ditc^es.
per 1,000 square !eet of ditch and slopes.
Sediment Accumulated sediment that exceeds 20% Citcit cleaned/flushed of all sediment ar•C
of ttte design depth. decris so fltat it matches design.
Vegetation Vegetation that reduces free movement of Water flows freely through ditches.
water through ditches.
Erosion Damage to Sse 'Ponds' Standard iVo. 1 See 'Ponds' Standard Nlo. t
Siopea
Rock Lining Cut of Maintenance person can see native soil Replace rccics b design standard.
Place or Missing (tt beneath the rock lining.
Applicable)
Catch Basins Sse 'Catch Basins' Standard No. 5 See 'Catch Basins' Standard Nlo. 5
Cebris Barriers See 'Debris Barriers' Standard No. 6 See 'Debris Barriers' Standard No. o'
(e.g., Trash Rack)
A-il 1/90
~~
aING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL
). 11 -GROUNDS (Landscaping)
'Ltalrttenana Corfdittlorfe VYhee Malnt+~anee Results Expected
Component Defect to treaded Whee ~ater+ar+Ce >s Perforrn~d
3eneral
'O13 and $l1Nba
Weeds
(Nonpoisonous)
Safety Huard
Trash or Utter
Damage
Weeds prowin9 in more than 20% of the Weeds prosent in teas than S% of the
landscaped ana (trees and shrubs onty). landscaped area.
Any presence of poison ivy or other
poisonous vegetatlan.
Paper, can, bottles, totalling more the- t
cable foot within a landscaped area (tr xs
and shrubs only) of 1,000 square test
Umbs or parts of tress or shrubs that are
spin or broken which affect moro than
25% of the total foliaQs of the tree or
shrub.
fJo poisonous vegetation prosent in a
landscaped area.
Area clear o/ litter.
Trees and shrubs with less than 5% of the
total feliags with split or broken ;imbs.
Trees or shrubs that have been blown
down or knocked over.
Trees or shrubs which aro not adequately
supported or a» leaninfl over, causing
exposure of the roots.
Tree or shrub in place free of injury.
Tree or shrub in plats and adequately
supported; romove any dead or diseased
trees.
A-12 I/g0
~~
APPENDIX C
PRELIMINARY CONDITIONS
Pre-Application Meeting
May 15, 2002
"*"These comments are preliminary in nature and are not intended to represent final comments and or
requirements for the City of Yelm. Until a complete application is made, the Community Development
Department can only attempt to inform the applicant of general requirements as they appear in the form
presented by the applicant at the time of pre-submission.
Proponent: NAPA Auto Parts
Representatives: Mike Metcalf, Metcalf, Lipke, & Rough
Project Proposal: Construct a 2,000 sq. ft. addition to the existing building.
Project Location: 509 Yelm Ave.
Yelm Municipal Code, Chapter 17.84 Site Plan Review: Site plan review and approval
shall be required prior to the use of land or building for the location of any commercial,
industrial or public building or activity. Exemptions from Site Plan review: No addition
of square feet; no additional tenant, or if expansion is for storage only; and, the
proposed use is similar as classified by the SICC.
Zoning: Commercial (C-1) Chapter 17.26
and Setbacks: Minimum lot size: 5,000 square feet.
Side yard setbacks - 10 feet
Rear yard setbacks - 20 feet
Front yard setbacks - 15 feet
Maximum height of buildings shall be 40 feet.
Parking: Chapter 17.72 Retail sales establishments require one stall for each 250
sq. ft. of gross floor area. Current building is 4242 sq. ft. and the addition
of 2000 sq, ft will require a total of 25 stalls. City of Yelm Development
Guidelines require that parking be paved and landscaped. Parking plan
shall be submitted with Site Plan Review.
Ingress/Egress:
Ingress and egress at the site shall be consistent with the Yelm
Development Guidelines 46.140. The current access located on Yelm
Avenue, and Vancil road. No additional accesses may be created.
Landscaping: Chapter 17.80, Type I, II, III, IV, and V.
Type I landscaping is intended to provide a very dense sight barrier and
physical buffer to significantly separate conflicting land uses. A 15-feet
Type I landscaping will be required along the southern property line,
between the residential use.
Type II landscaping is used to provide visual separation of compatible
uses. An 8-foot Type II landscaping is required around the perimeter of a
site, which has compatible zoning and adjacent to buildings to provide
visual separation of compatible use and soften the appearance of streets,
parking areas and building elevation.
Type III landscaping provides visual relief where clear sight is desired. This
landscaping is for separation of pedestrians from streets and parking.
Type IV landscaping is used to provide visual relief and shade in parking
areas.
Type V landscaping is intended to provide visual relief in storm water
retention/detention areas.
For the Type I, and Type II landscaping, existing natural vegetation may
be used as part of the required landscaping.
A conceptual landscaping plan is required with application for Site Plan
Review. Final landscaping and irrigation plan is required as element of
civil drawings.
Refuse area must be large enough to accommodate a dumpster and
recycle bin. Refuse areas must be of a material and design compatible
with the overall architectural theme. If fencing is used to enclose the
refuse area, it must be landscaped with sight obscuring vegetation.
Traffic: The City has adopted a Transportation Facility Charge (TFC) of $750.00
per pm peak trip. The Ordinance provides a default table that the
applicant can use to determine new pm trips generated. The Ordinance
lists new pm peak trip for miscellaneous retail to be 2.40 trips. To
determine the projects impact and fee, use the following formula for the
use proposed: TFC payment required at building permit issuance.
New Trip Generation Rate x gross floor area) 1,000 x $750.00 =TFC
Example: 2.40 x 2, 000 =4, 800) 7, 000 = 4.8 x $750.00 = $3, 600.00
If the applicant feels the proposed use would not generate the default
number of trips as designated in the TFC Ordinance an analysis prepared by
a Washington State Licensed Engineer can be submitted to the City for
review and consideration.
SEPA: Environmental checklist review is required if the building size is over 4,000
sq. ft., or more than 20 parking stalls are created. In this case, the total of
the entire building must be considered.
Application
and Process:
Site Plan Review, Chapter 17.84, is an administrative process. Minimum
application requirements are located in Section 17.84.060 and are listed on
the application form. A project of this size can expect completed review in
approximately 12 - 16 weeks. Land use approval typically contains
conditions of approval that the applicant must complete prior to receiving a
building permit.
Following land use approval, if civil drawings are required, they must be
submitted to the Community Development Department for review and
approval, and satisfy all conditions of approval. Upon satisfactory
completion of all conditions, the applicant can submit building plans for
approval.
OAPCA: Buildings containing asbestos and/or lead paint are potential environmental and
health hazards. State and federal laws regulate the demolition of buildings containing
asbestos and/or lead paint.
State law (WAC 173-425) defines land clearing burning as outdoor burning of trees,
stumps, shrubbery, or other natural vegetation from land clearing projects. Olympic Air
Pollution Control Authority (OAPCA) issues land clearing permits for burning.
The applicant shall contact the Olympic Air Pollution Control Authority, 909 Sleater-Kinney
Rd SE, Suite 1, Lacey, WA 98502, (360) 438-8768 to secure any necessary permit(s) for
the removal of materials containing asbestos and/or lead paint, and for land clearing burn
permits. Prior to issuance of a city building permit the applicant shall demonstrate
compliance with any OAPCA requirements.
Other: Design Guidelines -the attached checklist must be submitted at time of
application with responses on how each guideline requirement is met.
DESIGN GUIDELINES -NAPA Auto Parts Addition
Project Review Checklist - C-1 -Commercial Guidelines
Applicable Guidelines
Met
I.A.(1) Relate development to pedestrian oriented street frontage.
LA.(2) Relate development to street fronts (other than pedestrian-oriented streets). X
LB.(I) Minimize visibility and impacts of service areas. X
I.C.(1) Take advantage of special opportunities and mitigate impacts of large
developments.
LD.(1) Reduce impact of service areas and mechanical equipment. X
LE.(1) Integrate biofiltration swales and ponds into the overall site design. X
I.F.(1) Enhance the visual quality of development on corners. X
I.F.(2) Provide a paved pedestrian walkway from the street corner to the building
entrance. X
II.A.(1) All pedestrian paths must correspond with federal, state and local codes
for handicapped access, and the Americans with Disabilities Act. X
ILA.(2) Provide adequate lighting at the building entries and all walkways and
paths through parking lots. X
II.A.(3) Develop an on-site pedestrian circulation concept.
II.B.(I) Provide a pedestrian path at least 60" wide (preferably 96" wide) from the
street sidewalk to the main entry. X
II.B.(2) Provide pedestrian paths or walkways connecting all businesses and the
entries of multiple buildings on the same development site.
II.B.(3) Provide pathways through parking lots X
II.C.(1) Where street ROW is insufficient to provide adequate sidewalks buildings
and other site features must be set back from the public ROW to achieve at
least minimum sidewalk widths.
II.C.(2) Where new streets are developed, provide sidewalks according to
minimum standards.
II.D.(1) Provide, where feasible, pedestrian circulation routes to adjacent uses and
transit.
ILD.(2) Integrate nearby transit stops into the planning of adjacent site
improvements.
II.D.(3) Encourage pedestrian paths from all transit stops through commercial
areas to residential areas within 1,200 feet
II.E.(1) Enhance building entry access. X
II.F.(1) Provide pedestrian-oriented open space at key locations.
III.A.(1) Provide access roads through large lots with more than one street frontage.
IILB.(I) Minimize driveway impacts. X
III.C.(1) Meet requirements for location of parking lots on pedestrian-oriented
streets.
DESIGN GUIDELINES
Project Review Checklist Guidelines
Applicable Guidelines
Met
III.C.(2) Meet requirements for parking lot design detail standards. X
III.D.(1) Minimize parking areas through joint use and management.
III.D.(2) Encourage structured parking.
IILD.(3) Reduce impacts of parking garages.
IV.A.(1) Incorporate human-scale building elements. X
IV.B.(I) Reduce scale of large buildings.
IV.C.(1) Architecturally accentuate building corners at street intersections. X
IV.D.(1) Enhance buildings with appropriate details. X
IV.E.(1) Retain original facades. X
IV.E.(2) Use compatible building materials. (See Building Material Summary
Matrix, pg 53) X
IV.F.(1) Treat blank walls that are visible from the street parking or adjacent lot. X
IV.G.(I) Locate and/or screen roof-mounted mechanical equipment so as not to be
visible from the street or from the ground-level of adjacent properties. X
IV.G.(2) Where practical, locate and/or screen utility meters, electrical conduit and
other service and utilities apparatus so as not to be visible from the street. X
V.F.(1) Use plant materials that are approved for use in downtown Yelm.
Proponents may use other plat materials approved by the City.
V.G.(1) Develop a site landscape design concept. X
V.H.(1) Provide substantial site landscaping. X
V.H.(2) Protect and enhance natural features.
V.I.(1) Screen all parking lots as required by Chapter 17.80, Landscaping. X
V.I.(2) An alternative to the required perimeter parking area landscaping plan
may be submitted.
V.I.(3) Provide internal parking lot landscaping. X
V.J.(1) Consider alternative building and parking siting strategies to preserve
existing trees.
V.J.(2) Consider the integration of pedestrian and bicycle paths with stands of
mature trees where feasible to connect adjacent uses.
Pre-Application Meeting
Civil Comments
Date August 28, 2002
***These comments are preliminary in nature and are not intended to represent final comments and or
requirements for the City of Yelm. Until a complete application is made, the community development
department can only attempt to inform the applicant of general requirements as they appear in the form
presented by the applicant at the time of pre-submission.
Proponent: Metcalf, Lipke and Roush
Project: Napa Auto Parts 2000 SF Addition
Project Loc: 509 East Yelm Ave Yelm, WA 98597
Water:
Sewer:
Fire:
The proposed development is within the City's water service area and is
currently connected to the City's water system. Any additional water usage
will be charged based on the following criteria.
Water connection fees are based on a daily consumption rate and are
charged at a current rate of $1,500 per 240 gallons. (fee subject to change)
Proposed calculations will need to be provided at the time of civil review to
determine the number of gallons of daily use. These fees are payable at time
of building permit issuance.
Irrigation Meter:
An irrigation meter may be installed for the purpose of irrigation. A backflow
prevention device will be required for all landscape irrigation connections.
The proposed site will be required to connect to the City's sewer system.
There is a 8" STEP sewer line located in East Yelm Ave. You will be required
to connect to the main and install a step tank and associated pumping
system. This system will need to be in accordance with the City's
Development Guidelines.
The sewer connection fee is based on a daily discharge rate of 240 gallons
per day and is charged at a rate of $4,986 per 240 gallons/day (fee subject to
change). Your connection fee will be calculated by your submitted usage.
There is also a $145.00 inspection fee required for the sewer system. These
fees are payable at building permit issuance.
Fire protection must be provided per the Uniform Fire Code. There may be
requirements for installation of fire hydrants, fire truck access and fire truck
turn-around. These will be determined upon further review of the preliminary
civil and architect plans.
I:\28604\Incoming\082703\cc-082802 Napa remodel.doc
Stormwater: ,
If the proposed improvement is over 5,000 square feet of impervious
surface there are Stormwater treatment requirements per the D.O.E.
Stormwater Manual. At the time of Site Plan Review submittal a
Preliminary Stormwater Plan and report will be required.
Street Improvements:
At this time it does not appear that any frontage improvements will be
required.
Street Lighting:
At this time it does not appear that any street lights are required.
ADA Requirements:
The American Disabilities Act requires the improvements to be ADA
accessible. Facility improvements will have to meet current code. Review of
these improvements will be determined upon further review of the civil plans.
I:\28604\Incoming\082703\cc-082802 Napa remodel.doc