Preliminary Drainage Report
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Edward's House A~~ist~d Living Facility
Preliminary Drainage Report
July 2000
DESrGN/BUILD -CIVIL ,AND TF<.AIIJSPOR rATIOrJ ENt'iINEfp;ING. PLANNING. SURVEYING
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'Preliminary Drainage Report
Edward's House
ASSisted Llvmg FacilIty
Yelm, W ~shmgton
July 2000
Project I~formation
ProJect.
Prepared for.
Contact.
EtdWard's Hous~ ASSisted LlvmgFaCllity
Edward Dobbs
Edward Dobbs
;Edward's House AssocHltes LLC
POBox 277
North flams, OR 97133
(503)647-4745 '
l (503) 6.4T5566 fax
'R~viewing Ag~ncy
JunSaI~tIon.
ProJe~t Number
ProJ~ct Goi1tact.
p
Yelm, Washlhgton
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Project Engineer
:Prepa,red~by.
SeA Consultuig Group
677 vVoodl&nd Square Lopp, SE
PO Box' 3485,
I tacey, W A 98@9-3485
. (360) 493,.6002 ,FAX (360) 493,2476
Perry A. Shea, P:E ; Vicecpresldent
Marcy Gustafson, P.E , CIVIl Engmeermg MaIlager
Chns Merntt, EJ T
00056
f: \texti\pf\00b56\rel?ort~ \00560615.fdr
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Contact:
SCA ProJect.
File Number
PROJECT ENGINEERS CERTIFICATION I hereby certify that this
Preliminary Drainage ,Report' for the Edward s House Assisted Living
Facility in Yelm Washington has beep prepared by me or under my
supervision -and meets the intent of the City of Yelm Develo'pment
GuidelInes and Washi\lgton state Deparlme~tof Ecology (WSp<)E)
Stonnwater Manageinen,t Manual fo~ the Puget' Sound Basin unless noted
otherwise; and nonnal. standards of engineering practice, 'I understand that
the JU,risdiction do~s not and will not assume liability for tne 'sufficiency,
suitability, or pertonnance of drainage" facilities destgnecl' lor thIS
development. '
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TABLE OF CONTENTS
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PART I STORM DRAINAGE REPORT
SECTION I - PROPOSED PROJECT DESCRIPTION
SECTION 2 - EXISTING CONDITIONS
SECTION 3 - INFILTRATION RA TES/SOILS REPORT
SECTION 4 - WELLS AND SEPTIC SYSTEMS
SECTION 5 - FUEL TANKS
SECTION 6 - SUB-BASIN DESCRIPTION
SECTION 7 - ANALYSIS OF 100- YEAR FLOOD
SECTION 8 - AESTHETIC CONSIDERATIONS FOR FACILITIES
SECTION 9 - DOWNSTREAM ANALYSIS AND FACILITY SIZING
SECTION 10 - COVENANTS, DEDICATIONS, EASEMENTS
PART 11- EROSION CONTROL REPORT
SECTION I - CONSTRUCTION SEQUENCE AND PROCEDURE
SECTION 2 - TRAPPING SEDIMENT
SECTION 3 - PERMANENT EROSION CONTROL & SITE RESTORATION
SECTION 4 - GEOTECHNICAL ANALYSIS AND REPORT
SECTION 5 - INSPECTION SEQUENCE
SECTION 6 - CONTROL OF POLLUT A.NTS OTHER THAN SEDIMENTS
PART III - MAINTENANCE PLAN
SECTION I - REQUIRED MAINTENANCE
SECTION 2 - RESPONSIBLE ORGANIZATION
SECTION 3 - VEGETATION MANAGEMENT PLAN
SECTION 4 - RETENTION POND MAINTENANCE PLAN
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APPENDICES
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Appendix I - Prelimmary Drainage
CalculatIons
Appendix II Gradmg, Drainage and Erosion
Control Plan
Appendix III - FacIlity Summary Fonns
AppendIX IV - FEMA FIRM Map
Appendix V - SCS Soils Map and Soils Logs
Appendix VI - Vicinity Map
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Part 1
Storm'Drainage Repol
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Edward's House Assisted Living Facility Preliminary Drainage Report
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PART I STORM DRAINAGE REPORT
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SECTION 1 - PROPOSED PROJECT DESCRIPTION
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ProJect Proponent:
Edward Dobbs
Edward's House AssocIates LLC
POBox 277
North Plams, OR 97133
(503) 647-4745
(503) 647-5566 fax
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Parcel Numbers
21724120404
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Total Site Area.
2 70 Acres
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Zoned.
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Site Address
9500 block, KillIOn Road
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ReqUired Permits
Gradmg, Utility, BUIldmg, Plumbmg, Electncal, Mechamcal,
etc.
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SectIOn, Township, Range SectIOn 24, TownshIp 17 North, Range 2 East, W M.,
Thurston County, W A
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Site Location.
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The Site IS located m Yelm, Washmgton and IS bordered on the east by Killion Road, on
the south by eXlstmg commercial property and vanous bUIldmgs to the west and north.
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Project Overview
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The proposal IS to develop the 2 7 acres mto a 25,000 sf assIsted hvmg facIlity Access to
the Site Will be from a new entrance off KillIOn Road.
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The development of the proposed Site Will be constructed m one phase and wlllmclude
erOSIOn control measures, gradmg, storm dramage Improvements, frontage
Improvements, parkmg area, and extenSIOn of underground utilities mcludmg water and
sewer
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Storm Drainage Improvements
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The completed proJect Will create approximately 1 02 acres of new ImpervIOUS roadway,
parkmg, and pond areas, 1 38 acres of disturbed pervIOUS area, and 0 58 acres of roof
area.
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SCA Consulting Group
July 2000
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Edward's House Assisted Living Facility Preliminary Drainage Report
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Post-Development Basin Area Summary
Basm A Basm B Basm C Total
ImpervIOus Roof o 34 ac o 24 ac o 58 ac
ImpervIOus Roadwav/Sldewalk (on-site) o 10 ac o 36 ac o 04 ac o 50 ac
ImpervIOus Roadway/Sidewalk (off-site) o 26 ac o 26 ac
Disturbed PervIOus (on-site) o 52 ac o 45 ac o 40 ac 1 37 ac
Disturbed PervIOus (off-site) o 01 ac 001 ac
ImpervIOus Pond Area o 12 ac o 07 ac o 07 ac o 26 ac
Total 1 08 ac o 88 ac 1 02 ac 2 98 ac
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Stormwater Treatment:
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Stormwater treatment reqUIrements are based on the latest edition of the WSDOE
Stormwater Management Manual. StormShed (formerly WaterWorks) and FlowMaster
software were used to Size the treatment facilIties PrelImmary treatment calculatIOns
are provided m Appendix I
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Basm 'A'
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ThIS basm mcludes a maJor portIOn of the roof area and surroundmg landscapmg There
IS no roadway area wlthm thIS basm, therefore, no storm water treatment IS bemg
proposed.
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Basm 'B'
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Basm 'B' mcludes the entire parkmg lot area and surroundmg landscapmg areas Runoff
from the proposed parkmg area will sheet flow through curb opemngs mto a 3-foot wide
by 200-foot long bIOfiltratIOn swale The proposed bIOfiltratIOn swale exceeds the
mmImum treatment reqUIrements of the DOE Stormwater Manual.
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Basm 'c'
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ThIS basm mcludes the new roadway frontage Improvements mcludmg sidewalks
roadway, and landscapmg along with roof and onslte landscapmg areas Runoff from the
proposed KIllIon Road frontage will sheet flow mto a senes of catch basms where It IS
conveyed to a 3-foot wIde by 1I5-foot long bIOfiltratIOn swale The proposed bIOfiltratIOn
swale exceeds the mlmmum treatment reqUIrements of the DOE Stormwater Manual.
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Stormwater Storage/Infiltration.
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Stormwater storage and mfiltratIOn reqUIrements are based on the latest edition of the
WSDOE Stormwater Management Manual usmg a design mfiltratIOn rate of 20-
mches/hour PrelImmary storage and mfiltratIOn calculatIOns are provided m Appendix I
StormShed (formerly WaterWorks) software was used to Size the mfiltratIOn facilIties
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Edward's House Assisted Living Facility Preliminary Drainage Report
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Basm 'A'
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Storm water runoff from the proposed roof area will be conveyed through a senes of roof
dramplpes and discharged directly to an mfiltratIOn pond for storage and mfiltratIOn to
groundwater The proposed pond volume of 17,518 cf exceeds the mlmmum Storm Shed
modelmg reqUirement of 10,454 cf.
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Basm 'B'
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Treated parkmg lot stormwater runoff conveyed through the bIOfiltratIOn swale will
discharge mto a proposed 10,153 cf mfiltratIOn pond for storage and mfiltratIOn to
groundwater The proposed pond volume exceeds the mmlmum-modelIng reqUirement of
8,276 cf.
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Basm 'c'
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Treated runoff from the bIOfiltratlOn swale will discharge mto a proposed 15,136 cf
mfiltratIOn pond for storage and mfiltratIOn to groundwater The proposed pond volume
exceeds the mlmmum-modelIng reqUirement of 10,454 cf.
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Roof runoff will be tIghtlmed and discharged directly mto the mfiltratIOn pond.
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Storage Capacity Summary
Basm ID ImpervIOus Disturbed Storage (1) Storage
Area PervIOUS ReqUired PrOVided
Area "Modelmg"
Basm A o 56 ac o 52 ac 10,454 cf 17,518 cf
Basm B o 43 ac o 45 ac 8,276 cf 10,153 cf
Basm C o 61 ac o 41 ac 10,454 cf 15,136 cf
TOTAL 1 60 ac 1.38 ac 29,184 cf 42,807 cf
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(1) Based on desIgn mfiltrattOn rate of 20-mches/hour usmg StormShed software for the 100 year storm
event
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Roof Runoff:
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All roof runoff from the proposed commercial development will be tIghtlmed to the onslte
mfiltratIOn ponds for storage and mfiltratIOn to groundwater See basm descnptIOns
above
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SECTION 2 - EXISTING CONDITIONS
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The proJect IS rectangular m shape with 355 feet frontmg KIlhon Road. The property IS
fairly flat with gentle slopes to the southwest and northwest where elevatIOns are
approximately 347 ft. The hIghest elevatIOn of 350 ft IS at the southeast corner The site
has been cleared recently of scotch broom and shrubbery to allow for SOlIs testmg
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Edward's House Assisted Living Facility Preliminary Drainage Report
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There are no creeks, lakes, ponds, sprmgs, wetlands, ravmes, gullies, steep slopes or
other environmentally sensitive areas Identified onslte or down gradient of the subJect
property
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The site IS located m an aqUifer sensitive area, accordmg to the 1986 Thurston County
Comprehensive Plan M-8 The site IS not located m a wellhead protectIOn area.
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SECTION 3 -INFILTRATION RATES/SOILS REPORT
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The SOlI ConservatIOn Service (SCS) SOIl Survey of Thurston County classifies onslte sOils
as Spanaway (110) serIes Onslte sOlI test pitS exammed confirm the SCS classificatIOn
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Eleven test pitS were dug to a depth of approximately 4-feet to 8-feet. A map IS supplIed
m Append1x V showmg sOlI test pit locatIOns No groundwater was encountered m the
test pitS, therefore, the bottom of the mfiltratIOn pond wIll be at least three feet above the
seasonal high ground water table, per WSDOE reqUirements
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Four double rIng mfiltratIOn tests were performed onslte, two m InfiltratIOn Pond A and
one each m InfiltratIOn Ponds Band C An mfiltratIOn rate of 20 mches per hour was
used for design purposes ThIs IS a conservative rate based on actual mfiltratIOn rates
observed m the field.
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Copies of the sOlI logs and InfiltratIOn tests along with maps are provided In Appendix V
of thIS report.
SECTION 4 - WELLS AND SEPTIC SYSTEMS
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No onslte wells were found durIng our site InvestigatIOn of the proposed site No onslte
well logs were found at the Department of Ecology
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No abandoned or eXistIng septic systems were Identified dUrIng SCA's site InvestigatIOn
or at the Thurston County Development Services office Any septic system found will be
removed In accordance with Thurston County Department of Health standards
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SECTION 5 - FUEL TANKS
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No fuel tanks were located dUring SCA's site InSpectIOn or durIng sOlIs work.
AddItIOnally, a reView of the DOE's LeakIng Underground Storage Tank (LUST) lIst did
not Indicate any eXistIng or abandoned fuel tanks on the proJect site
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SECTION 6 - SUB-BASIN DESCRIPTION
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The proJect site IS located In the Thompson Creek DraInage BasIn per Thurston County
Comprehensive Map M-4
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DurIng SCA's site InvestigatIOn and sOlIs analysIs, It appeared that all onslte stormwater
runoff IS contaIned on sIte and Infiltrated back Into the groundwater, which IS typical of
the sIte's SOlI classIficatIOn. All onsIte stormwater runoff will be contaIned and Infiltrated
onslte
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There does not appear to be any eXlstmg off site dramage to the property However, once
the site IS developed, there will be approximately 0 27 acres of off site area (the west half
of KIllIon Road), which will dram onto the property Runoff from thIS basm area will be
collected, treated, and mfiltrated m the proposed onslte storm dramage facilIty
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As discussed prevIOusly, the proposed development has been divided mto three dramage
sub-basms Two basms consist of a bIOfiltratIOn swale to provide stormwater treatment
and an mfiltratIOn pond to provide storage and mfiltratIOn of the treated stormwater
The remammg basm consists of an mfiltratIOn pond for storage and mfiltratIOn of roof
runoff and the surroundmg landscape areas
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No hazardous matenals handlmg IS antiCipated m the area trIbutary to the storm
dramage facilIties
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SECTION 7 - ANALYSIS OF 100-YEAR FLOOD
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ThIS proJect does not lIe adJacent to or con tam a stream onslte and has not been Identified
as a 100-year flood hazard area. A FEMA FIRM Map IS mcluded m Appendix IV
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SECTION 8 - AESTHETIC CONSIDERATIONS FOR FACILITIES
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All disturbed pervIOus areas will be vegetated and landscaped. The bIOfiltratIOn swales
will be hydroseeded and sodded Immediately followmg constructIOn. The mfiltratIOn
ponds are designed to be aesthetically pleasmg and blend m with the surroundmg
landscape
SECTION 9 - DOWNSTREAM ANALYSIS AND FACILITY SIZING
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SIzmg calculatIOns for the proJect's stormwater treatment, storage, and mfiltratIOn
facilIties are provided m Appendix I of thIS report. All calculatIOns correspond to the sIte
dramage map, which can be found m Appendix III of thIS report
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Smce all stormwater will be mfiltrated onslte, a downstream analysis was not deemed
necessary
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SECTION 10 - COVENANTS, DEDICATIONS, EASEMENTS
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Onslte dramage facilIties mcludmg pipes, bIOfiltratIOn swales, and mfiltratIOn ponds will
reqmre routme mamtenance The mamtenance manual prepared for the proJect will lIst
the mamtenance reqmrements A copy of the completed Mamtenance Manual can be
supplIed to the City upon completIOn of the proJect
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Part II -
Erosion contrQl RepOi
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Edward's House Assisted Living Facility Preliminary Drainage Report
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PART II - EROSION CONTROL REPORT
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SECTION 1 - CONSTRUCTION SEQUENCE AND PROCEDURE
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The proposed commerCIal development wIll mclude site gradmg and erOSIOn control
measures designed to con tam Silt and sOlI wlthm the project boundarIes durmg
constructIOn until permanent vegetatIOn and site Improvements are m place
ErosIOn/sedImentatIOn control shall be achieved by a combmatIOn of structural/vegetative
cover measures and constructIOn practices tailored to fit the site
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Best Management Practices (BMP's) will be employed to properly clear and grade the site
and to schedule constructIOn activities Before any constructIOn begms onslte, erOSIOn
control facilIties shall first be mstalled. The planned constructIOn sequence IS as follows
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1 Schedule preconstructIOn conference wIth the City, contractor, project engmeer
and constructIOn-stakmg surveyor
2 Install rock constructIOn entrance Use 4" to 8" diameter spalls with 12"
mlmmum depth
3 Install filter fabrIc fencmg m the locatIOns shown on the plans
4 Clear site (grubbmg and rough gradmg)
5 Mamtam eqUIpment and water supply for dust control.
6 Designate an area for washmg concrete trucks to control the runoff and elImmate
entry mto the storm dramage system
7 Install underground utilItIes (water, sewer, storm) Construct storm dramage
ponds and hydroseed.
8 Provide mlet protection around all new catch basms
9 Construct roadway and mstall landscapmg, sod and/or seed, and mulch all
disturbed areas
10 Mamtam all erOSIOn control facilIties until the entire site IS stabilIzed and Silt
runoff ceases
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SECTION 2 - TRAPPING SEDIMENT
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Filter fabrIc fencmg will be mstalled to trap sediment before runoff eXits the site In
addItIOn, mlet protectIOn will be mstalled around all eXlstmg and new catch baSInS to
filter out sediment before runoff enters the storm system
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A stabilIzed constructIOn entrance will be mstalled to prevent constructIOn vehicles from
trackmg sOIl onto roadways If sediment IS tracked off site, It shall be swept or shoveled
from paved surfaces on a dally baSIS, so that It IS not washed mto eXlstmg catch baSInS or
other storm dramage faCilIties
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DUrIng the ramy season from November 1 through March 31, the contractor must cover
any disturbed areas greater that 5,000 SF m Size If they will be unworked for more than
12 hours Mulch, soddmg, or plastic covermg shall be used to prevent erOSIOn m these
areas
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Edward's House Assisted Living Facility Preliminary Drainage Report
SECTION 3 - PERMANENT EROSION CONTROL & SITE RESTORATION
All disturbed areas will be paved with asphalt, covered by bmldIngs, or landscaped with
grass, shrubbery, or trees per the landscapIng plans Rlprap aprons will be Installed at
pond Inlets to prevent erOSIOn In those areas
SECTION 4 - GEOTECHNICAL ANALYSIS AND REPORT
None of the storm draInage facilIties are located near the top of a steep slope Therefore,
a geotechmcal analysis for slope or sOlI stabilIty was not deemed necessary See
Appendix V for a complete sOils deSCrIption.
SECTION 5 - INSPECTION SEQUENCE
In addItion to reqUired City InSpectIOns, the ProJect Engineer will Inspect facilIties
related to stormwater treatment, erOSIOn control, storage, and conveyance durIng
constructIOn. At a mlmmum, the folloWIng Items shall be Inspected at the time speCIfied.
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The erOSIOn control facilIties shall be Inspected before the start of clearIng and
gradIng to ensure the folloWIng structures are In place
a. ConstructIOn Entrance
b Filter FabrIc Fences
c Inlet protectIOn of new catch baSInS
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The conveyance systems wIll be Inspected after construction of the facIlIties, but
before proJect completIOn to ensure the folloWIng Items are In workIng order.
a. Pavement DraInage
b Catch BaSInS
c. BIOfiltratIOn Swales
d. Conveyance PipIng
e Roof DraIn PipIng
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The ponds shall be Inspected durIng and after construction to ensure
a. The facilIty IS constructed to design speCificatIOns and that protectIOn
from sediments IS In place
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The permanent site restoratIOn measures shall be Inspected after landscapIng IS
completed.
A final InSpectIOn shall be performed to verIfy final grades, settIngs of structures and all
necessary InformatIOn to complete the Engmeer's ConstructIOn InspectIOn Report Form.
ThIs form must be completed prIor to final publIc works constructIOn approval.
SECTION 6 - CONTROL OF POLLUTANTS OTHER THAN SEDIMENTS
The contractor Will be reqUired to designate a washdown area for concrete trucks as well
as a temporary stockpile area for constructIOn debrIS Catch baSIn Inlet protectIOn and
filter fabrIC fenCIng shall remaIn In place until construction on the site IS complete
SCA Consulting Group
July 2000
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Maintenance PIa
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PART 11I- MAINTENANCE PLAN
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INSTRUCTIONS FOR MAINTENANCE OF STORM DRAINAGE FACILITIES
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The folloWIng pages contaIn maIntenance needs for most components that are part of the
proposed draInage system A checklist should be completed for all system components
accordIng to the folloWIng schedule
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1 Monthly from November through Apnl
2 Once In late summer (preferably September)
3 After any major storm (use I" In 24-hours as a gUidelIne) Items marked "s" only
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USIng photocopies of these pages, check off the problems Identified wIth each InSpectIOn.
Add comments on problems found and actIOns taken. Keep these "checked" sheets In a
file, as they wIll be used to WrIte the annual report (due In May of each year) Some Items
do not need to be checked with every InSpectIOn. Use the suggested frequency at the left
of each Item as a gUideline for the InSpectIOns
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The City of Yelm IS aVailable for techmcal assistance Do not hesitate to call, especially If
It appears that a problem may eXist
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ATTACHMENT "A'" MAINTENANCE PROGRAM
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COVER SHEET
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InspectIOn PerIod.
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Number of Sheets Attached.
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Date Inspected.
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Name of Inspector
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Inspector's Signature
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Edward's House Assisted Living Facility Preliminary Drai!"lage Report
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SECTION 1 -
REQUIRED MAINTENANCE
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The dramage facilities will reqUire occasIOnal mamtenance The checklists below are the
mlmmum mamtenance reqUirements and mspectIOn frequencies
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Mamtenance Checkhst for Conveyance Systems (Pipes and Swales)
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Frequency Drainage ..J Problem CondItIons to Check For CondItIOns That Should
System Req'd EXist
Feature
M.S PIpes ..J SedIment & Accumulated sediment that PIpe cleaned of all
debns exceeds 20% of the diameter of sediment and debns.
the pIpe.
M ..j Vegetation VegetatIOn that reduces free All vegetatIOn removed
movement of water through pipes. so water flows freelv
A ..j Damaged ProtectIve coating IS damaged, PIpe repaIred or replaced.
( rusted, rust IS causing more than 50%
bent or detenoratlOn to any part of pIpe.
crushed)
M "j Any dent that sIgnificantly PIpe repaired or replaced,
impedes flow (i.e., decreases the
cross sectIOn area of pIpe by more
then 20%),
M PIpe has major cracks or tears PIpe repaired or replaced.
allOWing groundwater leakage.
M.S Swales ..J Trash & Dumping of yard wastes such as Remove trash and debns
debns grass clIppings and branches Into and dIspose as prescribed
swale AccumulatIon of non- by CIty Waste
degradable matenals such as Management SectIOn.
glass, plastIC, metal, foam and
coated paper
M ..j Sediment Accumulated sediment that Swale cleaned of all
buildup exceeds 20% of the deSIgn depth sedIment and debns so
that It matches deSIgn.
M ..j VegetatIOn Grass cover IS sparse and weedy Aerate sOIls and reseed
not or areas are overgrown wIlh and mulch bare areas
growing or woody vegetation Maintain grass heIght at a
overgrown mInimum of 6" for best
storm water treatment.
Remove woody growth,
recontour and reseed as
necessary
M ..J ConversIon Swale has been filled In or If possible, speak wIlh
by owner to blocked by shed, woodpile, owner and request that
Incompatibl shrubbery, etc swale area be restored.
e use Contact CIty to report
problem If not rectIfied
voluntarily
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Frequency Dramage " Problem ConditIOns to Check For CondItIOns That Should
System Req'd EXIst
Feature
A " Swale does Water stands m swale or flow A survey may be needed
not dram velocity IS very slow StagnatIOn to check grades. Grades
occurs. need to be m I % range If
possible If grade IS less
than 1%, underdrams may
need to be mstalled.
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If you are unsure whether a problem exists, please contact the Jurisdiction and ask for technical assistance,
Comments:
Key' A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storms
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ATTACHMENT "A" (CONTINUED)
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Mamtenance Checkhst for Energy Dissipaters
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Frequency DraInage Problem CondItions to Check For CondItIOns That Should EXist
System "j
Feature
A Rock Pad ..J MisSIng or Only one layer ofrock Replace rocks to desIgn
moved rock eXIsts above native soIl In standard,
area 5 square feet or larger,
or any exposure of natIve
soIl
A Rock-filled ..J MisSIng or Trench IS not full of rock. Add large rock (:1:30 lb
trench for moved rock each) so that rock IS VIsible
dIscharge above edge of trench.
from pond
M DIspersIOn "j PIpe plugged Accumulated sediment that PIpe Cleaned/flushed.
trench WIth sedIment exceeds 20% of the desIgn
depth
M PerforatIOns Over 1/2 of perforatIOns in Clean or replace perforated
plugged pIpe are plugged WIth pIpe.
debrIS and sedIment.
M,S -.J Not Visual eVIdence of water Trench must be redeSIgned
dIschargIng dIschargIng at concentrated or rebuilt to standard.
water properly pOInts along trench (normal ElevatIOn of IIp of trench
conditIon IS a "sheet tlow" should be the same (flat) at
of water along trench). all pOInts.
Intent IS to prevent erosIOn
damage
M,S Water flows MaIntenance person FaCIlIty must be rebuIlt or
out top of observes water tlOWIng out redeSIgned to standards.
" distributor" dUrIng any storm less than Pipe IS probably plugged or
catch basIn the desIgn storm or It'S damaged and needs
caUSIng or appears likely to replacement.
cause damage.
M,S ReceiVIng area Water In receIvIng area IS StabIlIze slope WIth grass or
over-saturated caUSIng or has potentIal of other vegetatIOn, or rock If
caUSIng landslIde. condItion IS severe
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Comments:
Key' A = >\nnual (March or >\pril preferred)
M = Monthlv (see schedule)
S = Alter major slonns
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ATTACHMENT "A" (CONTINUED)
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Mamtenance Checkl1st for Catch Basins and Inlets
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Frequency Drainage -.J Problem Conditions to Check For ConditIOns That
System Should Exist
Feature
M,S General ~ Trash, debns and Trash or debris In front of No trash or debns
sediment In or on the catch basin opemng IS located
basin blocking capacity by more ImmedIately In
than 10%. front of catch basin
opening Grate IS
kept clean and
allows water to
enter
M -.J SedIment or debns (in the No sedIment or
basin) that exceeds 1/3 the debns In the catch
depth from the bottom of basin. Catch basin
basin to Invert of the tS dug out and
lowest pIpe Into or out of clean.
the basin.
M.S -.J Trash or debns m any Inlet Inlet and outlet
or pipe blocking more than pIpes free of trash
1/3 of Its heIght. or debns.
M ~ Structural Comer of frame extends Frame IS even wnh
damage to frame more than 3/4" past curb curb
and/or top slab face Into the street (If
applicable ).
M -.J Top slab has holes larger Top slab IS free of
than 2 square Inches or holes and cracks,
cracks wIder than 1/4"
(Intent IS to make sure all
matenalIs running Into the
basin).
M -.J Frame not sitting flush on Frame IS SItting
top slab, Le., separation of flush on top slab
more than 3/4" of the
frame from the top slab
A 7 Cracks In basin Cracks wider than 1/2" and Basin replaced or
walls/bottom longer than 3', any repaIred to desIgn
evidence of soil partIcles standards Contact
entenng catch basin a professIOnal
through cracks or engineer for
maintenance person Judges evaluatIOn,
that structure IS unsound.
A -.J Cracks wIder than 112" and No cracks more
longer than l' at the JOint than 1/4" wide at
of any Inlet/outlet pIpe or the Jomt of
any eVIdence of soil inlet/outlet pIpe,
partIcles entenng catch
basin through cracks.
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Frequency Drainage ..J Problem ConditIOns to Check For ConditIOns That
System Should Exist
Feature
A ..J Settlement/mis- Basin has settled more than Basin replaced or
alignment I" or has rotated more than repaired to design
2" out of alignment. standards. Contact
a professIOnal
engineer for
evaluatIon.
M.S ~ Fire hazard or Presence of chemicals such No color odor or
other pollutIOn as natural gas, oil and sludge. Basin IS
gasoline. ObnoxIOus dug out and clean
color, odor or sludge
noted.
M.S 7 Outlet pipe IS VegetatIOn or roots No vegetatIon or
clogged with grOWing In Inlet/outlet pIpe root growth
vegetatIOn JOints that is more than 6" present.
tall and less than 6" apart.
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Comments:
I<..ey A; Annual (March or April preferred)
M ; Monthlv (see schedule)
S ; Alter major storms
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ATTACHMENT "A" (CONTINUED)
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Mamtenance ChecklIst for Ponds
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Frequency Dramage ..j Problem Cond1tIons to Check Cond1tIons That
System For Should EX1st
Feature
M,S General "j Trash & debns Dumping of yard Removed trash and
bUildup m wastes such as grass debns and d1spose as
pond. chppmgs and prescnbed by Clty
branches mto basm, Waste Management
Uns1ghtly SectlOn
accumulatlOn of
nondegradable
matenals such as
glass, plastIc, metal,
foam and coated
paper
M,S Trash rack Bar screen over Replace screen,
plugged or outlet more than 25% Remove trash and
m1ssmg covered by debns or debns and d1spose as
m1ss1ng prescribed by C1ty
Waste Management
SectlOn.
M POlsonous Any pOlsonous Remove pOlsonous
vegetatlOn vegetatlOn, wh1ch vegetatlOn. Do not
may const1tute a spray chem1cals on
hazard to the pubhc. vegetatlOn w1thout
Examples of obtammg gmdance
pOlsonous vegetatlOn from the CooperatIve
mclude tansy ExtenslOn Serv1ce
ragwort, pOlson oak, and approval from
stmgmg nettles, the C1ty
dev1lsclub
M,S F1re hazard or Presence of chem1cals Fmd sources of
pollutlOn such as natural gas, pollutlOn and
oil and gasolme, ehmmate them.
obnoxlOus color, odor Water 1S free from
or sludge noted. notIceable color, odor
or contam1natlOn.
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M ..j VegetatlOn not For grassy ponds, For grassy ponds,
growIng or IS grass cover IS sparse selectIVely thatch,
overgrown and weedy or IS aerate, and reseed
overgrown. For ponds Grass cuttmg
wetland ponds, unnecessary unless
plants are sparse or dIctated by
mvaSIve speCIeS are aesthetIcs For
present. wetland ponds,
handplan nursery-
grown wetland plants
m bare areas
Contact the
CooperatIve
ExtenslOn ServIce for
dIrectlOn on mvaSIve
speCIeS such as
purple loosestate and
reed canary grass
Pond bottoms should
have umform dense
coverage of desIred
nlant sneCIes.
M Rodent holes Any eVIdence of Rodents destroyed
rodent holes If facIhty and dam or berm
IS actmg as a dam or repaired. Contact
berm, or any the Thurston County
eVIdence of water Health Department
pIplllg through dam for gUIdance
or berm VIa rodent
holes
M Insects When insects such as Insects destroyed or
wasps and hornets removed from sIte
lllterfere WIth Contact CooperatIve
mamtenance ExtenslOn SerVIce for
actIVItIes, or when gUIdance
mosqUItoes become a
nUIsance
A ..j Tree growth Tree growth does not Trees do not hlllder
allow mallltenance maintenance
access or interferes actlvitIes Be lecttvely
wIth mallltenance cultivate trees such
actIvIty (i.e , slope as alders for
mowlllg, slIt removal, firewood.
or eqUIpment
movements) If trees
are not lllterfermg
wtth access, leave
trees alone
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M SIde slopes ErosIOn on Check around mlets Fmd causes of
of pond berms or at and outlets for sIgns erOSIOn and elImmate
entrance/exIt. of erOSIOn. Check them. Then slopes
berms for sIgns of should be stabIlIzed
slIdmg or settlmg by usmg approprlate
ActIOn IS needed erOSIOn control
where eroded damage measure(s), e.g rock
over 2 mches deep reInforcement,
and where there IS plantmg of grass,
potential for compactIOn.
contmued erOSIOn.
M Storage '-l SedIment Accumulated SedIment cleaned out
area bUIldup m pond sedIment that to desIgned pond
exceeds 10% of the shape and depth,
desIgned pond depth. pond reseeded If
BUrled or partially necessary to control
bUrled outlet erOSIOn.
structure probably
mdIcates sIgmficant
sedIment deposIts
A Pond dIkes Settlements Any part of dike, DIke should be bUIld
whIch has settled 4 back to the desIgn
mches lower than the elevatIOn.
desie-n elevatIOn.
A Emergency Rock mIssmg Only one layer of Replace rocks to
overflow/ rock eXIsts above desIgn standards
spIllway native SOlI m area 5
square feet or larger,
or any exposure of
native SOIL
One TIme Emergency Overflow SIde of pond has no Contact CIty for
overflow/ mIssmg area wIth large rocks gUIdance
spillway to handle emergency
overflows,
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Comments:
Key' A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storms
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ATTACHMENT "A" (CONTINUED)
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Mamtenance ChecklIst for Infiltration Systems
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Frequency Dramage -"j Problem CondItIOns to Check For CondItIOns That Should
System EXIst
Feature
M,S General Trash & See Mamtenance See Mamtenance
debris ChecklIst for Ponds ChecklIst for Ponds
bmldup m
pond
M POIsonous See Mamtenance See Mamtenance
vegetatIOn ChecklIst for Ponds ChecklIst for Ponds.
M,S FIre hazard See Mamtenance See Mamtenance
or pollutlOn ChecklIst for Ponds ChecklIst for Ponds.
M VegetatlOn See Mamtenance See Mamtenance
not growmg ChecklIst for Ponds. ChecklIst for Ponds
or IS
overgrown
M Rodent See Mamtenance See Mamtenance
holes ChecklIst for Ponds ChecklIst for Ponds
M Insects See Mamtenance See Mamtenance
ChecklIst for Ponds ChecklIst for Ponds
A Storage -"j SedIment A sOlI texture test SedIment IS removed
area bmldup m mdlcates facIlIty IS not and/or facIlIty IS cleaned
system workmg at ItS deSIgned so that mfiltratlOn
capabllItles or was system works accordmg
mcorrectly designed. to desIgn. A sedIment
trappmg area IS mstalled
to reduce sedIment
transport mto
mfiltratlOn area.
A -"j Storage A sotl texture test AddItIOnal volume IS
area drams mdlcates facIlIty IS not added through
slowly workmg at ItS deSIgned excavatIOn to prOVIde
(more than capabIl1tles or was needed storage SOlI IS
48 hours) mcorrectly deSIgned. aerated and rototllled to
or Improve dramage
overflows Contact the CIty for
mformatlOn on ItS
reqmrements regardmg
excavatIOn.
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M SIde slopes ErOSIOn on Check around inlets Fmd causes of
of pond berms or at and outlets for sIgns erOSIOn and ehmmate
entrance/exIt. of erOSIOn. Check them. Then slopes
berms for sIgns of should be stablhzed
shdmg or setthng by usmg appropnate
ActIOn IS needed erOSIOn control
where eroded damage measure(s), e.g rock
over 2 mches deep remforcement,
and where there IS plantmg of grass,
potential for compactIOn.
contmued erOSIOn.
M Storage "j SedIment Accumulated SedIment cleaned out
area bUIldup m pond sedIment that to desIgned pond
exceeds 10% of the shape and depth,
desIgned pond depth. pond reseeded If
Buned or partially necessary to control
buned outlet erOSIOn.
structure probably
mdlcates slgmficant
sedIment deOoslts
A Pond dIkes Settlements Any part of dike, DIke should be bUIld
whIch has settled 4 back to the desIgn
mches lower than the elevatIOn.
deSIgn elevation.
A Emergency Rock mlssmg Only one layer of Replace rocks to
overflow/ rock eXIsts above deSIgn standards.
spIllway natlve SOlI m area 5
square feet or larger,
or any exposure of
natIve SOIL
One TIme Emergency Overflow SIde of pond has no Contact CIty for
overflow/ mIssmg area WIth large rocks gUIdance
spillway to handle emergency
overflows
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If you are unsure whether a problem exists, please contact the J unsdiction and ask for techmcal assistance
Comments:
Key' A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storms
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ATTACHMENT "A" (CONTINUED)
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Mamtenance ChecklIst for Infiltration Systems
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Frequency Dramage ~ Problem CondItIOns to Check For CondItIOns That Should
System EXIst
Feature
M,S General Trash & See Mamtenance See Mamtenance
debns ChecklIst for Ponds ChecklIst for Ponds
bmldup III
pond
M POIsonous See Mamtenance See Mamtenance
vegetatIOn ChecklIst for Ponds. ChecklIst for Ponds
M,S FIre hazard See Mamtenance See Mamtenance
or pollutIOn ChecklIst for Ponds. ChecklIst for Ponds
M VegetatIOn See Mamtenance See Mamtenance
not growmg ChecklIst for Ponds ChecklIst for Ponds
or IS
overgrown
M Rodent See Mamtenance See Mallltenance
holes ChecklIst for Ponds ChecklIst for Ponds
M Insects See Mamtenance See Mamtenance
ChecklIst for Ponds. ChecklIst for Ponds
A Storage ~ SedIment A soIl texture test SedIment 1S removed
area bmldup III md1cates facIlIty 1S not and/or fac1lIty 1S cleaned
system workmg at 1tS des1gned so that mfiltratIOn
capabIlItIes or was system works accordmg
mcorrectly deSIgned. to deSIgn, A sedIment
trappmg area 1S mstalled
to reduce sed1ment
transport mto
mfiltratlOn area.
A ~ Storage A SOlI texture test AddItional volume 1S
area drams md1cates fac1lIty 1S not added through
slowly workmg at 1tS deSIgned excavatIOn to proVlde
(more than capabtlItles or was needed storage. SOIL IS
48 hours) mcorrectly deSIgned. aerated and rototllled to
or 1mprove dramage
overflows Contact the C1ty for
mformatIOn on 1tS
reqmrements regardmg
excavatlOn.
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M SedIment Any sedIment and debrIs Clean out sump to desIgn
trappmg fillmg area to 10% of depth.
area depth from sump
bottom-to-bottom of
outlet pIpe or
obstructmg flow mto the
connector ptpe
One TIme SedIment Stormwater enters Add a trappmg area by
trappmg mfiltratIOn area directly constructmg a sump for
area not wIthout treatment. settling of solIds
present Segregate settlmg area
from rest of faCIlIty
Contact CIty for
gmdance
M Rock '-I SedIment By vIsual mspectIOn Replace gravel m rock
fil te rs and debrIS lIttle or no water flows filter
through filter durmg
heavy ramstorms
S InfiltratIO '-I InfiltratIOn Standmg Water m Excavate bottom of
n FaIlure InspectIOn Well After trench as necessary but
Trenches 48 hours after storm or at least 3 feet. Replace
Overflow durmg Storms WIth crushed rock.
Check pretreatment
systems for
effectiveness Check
tributary area for
sedIment sources.
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Comments:
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A = '\nnual (March or April preferred)
M = Monthly (see schedule)
S = After major storms
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ATTACHMENT "A" (CONTINUED)
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Mamtenance ChecklIst for Grounds (Landscapmg)
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Frequen Dramage "j Problem CondItIons to Check CondltlOns That Should
cy System For EXIst
Feature
M General "j Weeds Weeds growmg m Weeds present m less
(nonpOlsono more than 20% of the than 5% of the landscaped
us) landscaped area (trees area.
and shrubs only)
M "j Safety Any presence of pOlson No pOlsonous vegetatlOn
hazard IVY or other pOlsonous or msect nests present m
vegetatlOn or msect landscaped area,
nests.
M,S "j Trash or See Ponds ChecklIst. See Ponds ChecklIst.
lItter
M,S "j EroslOn of NotIceable nlls are Causes of erOSlOn are
Ground seen m landscaped IdentIfied and steps taken
Surface areas to slow down/spread out
the water Eroded areas
are filled, contoured, and
seeded.
A Trees and "j Damage LImbs or parts of trees Tnm trees/shrubs to
shrubs or shrubs that are splIt restore shape. Replace
or broken whIch affect trees/shrubs wIth severe
more than 25% of the damage
total folIage of the tree
or shrub
M "j Trees or shrubs that Replant tree, mspectmg
have been blown down for mJury to stem or roots
or knocked over Replace If severely
damaged.
A "j Trees or shrubs whIch Place stakes and rubber-
are not adequately coated tIes around voung
supported or are trees/shrubs for support.
leamng over, causIng
exposure of the roots
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[fyou are unsure whether a problem exists, please contact the JurisclIctlOn and ask for technIcal assistance
Comments:
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Kev
1'1
A = Annual (March or April preferred)
M = Monthly (see schedule)
S = After major storms
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1'1
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SCA Consulting Group
July 2000
Page 22
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Edward's House Assisted Living Facility Preliminary Drainage Report
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SECTION 2 -
RESPONSIBLE ORGANIZATION
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The proJect owner shall be responsible for the operatIOns and mamtenance of all onslte
storm dramage facIlItIes.
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SECTION 3 -
VEGETATION MANAGEMENT PLAN
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All disturbed pervIOUS areas on the site Will be landscaped to provide an aesthetically
pleasmg envIronment.
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n
SECTION 4 -
SOURCE CONTROL
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WarnIng signs (e g, "Dump No Waste - Drams to Groundwater") will be embossed or
pamted on or adjacent to all storm drammlets and will be repamted penodlcally as
necessary
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SCA Consulting Group
July 2000
Page 23
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Prehmmary Di'am4ge calculation
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Edward's House Assisted Living Facility Preliminary Drainage Report
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LJ
PRELIMINARY DRAINAGE CALCULATIONS
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The folloWIng calculatIOns are based on the reqmrements contaIned In the WashIngton
State Department of Ecology (WSDOE) Stormwater Management Manual for the Puget
Sound BasIn.
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DESIGN AND BASIN INFORMATION SUMMARY'
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Post-Development Basin Area Summary
BasIn A BasIn B BasIn C Total
ImpervIOus Roof o 34 ac o 24 ac o 58 ac
ImpervIOus Roadway/Sidewalk (on-site) o 10 ac o 36 ac o 04 ac o 50 ac
ImpervIous Roadway/Sidewalk (off-site) o 26 ac o 26 ac
Disturbed PervIOus (on-site) o 52 ac o 45 ac o 40 ac 1 37 ac
Disturbed PervIOus (off-site) o 01 ac o 01 ac
ImpervIOus Pond Area o 12 ac o 07 ac o 07 ac o 26 ac
Total 1 08 ac o 88 ac 1.02 ac 2 98 ac
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Soil Classification (Soil Survey of Thurston County, WA)
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SCS SOlI ClassIficatIOn.
Hydrologic Group
Design InfiltratIOn Rate
Spanaway, Nlsqually
B
20 Inches/hour
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SCS Runoff Curve Number' (Table III-1 3 WSDOE Storm Manual)
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Post-developed (Lawns, 75% + grass cover)
Post-development (ImpervIOus)
CN = 74
eN = 98
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Rainfall Design Storms' (WSDOE Isopluvlal Maps - App AIII-ll ofWSDOE Storm
Manual)
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6 month storm (64% of 2 yr storm)
2 yr./24 hour storm
10 yr./24 hour storm
100 yr./24 hour storm
= 1 28"
= 2 0"
= 3 0"
= 4 0"
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Edward's House Assisted Living Facility Preliminary Drainage Report
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DETAILED CALCULATIONS
(I
Stormwater Treatment:
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Basm 'A'
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ThIS basm mcludes roof and landscape area runoff only, therefore, no treatment IS
proposed.
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Basm 'B'
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StormShed software was used to model the 6-month and 100-year storm events, which
resulted m a peak, flow rate of 0 22-cfs and 1 04-cfs, respectively
n
n
FlowMaster software was used to determme the mlmmum bottom width of the swale to
treat the 6-month storm event, which resulted m a v-ditch sectIOp. Therefore, a 3-foot
wide by 200-foot long swale IS bemg proposed to treat the 6-month storm event with a
o 54-ft/sec. and a flow depth of 0 lI-feet. Also, FlowMaster software was used to
determme that the proposed swale has adequate capacity to convey the 100-year storm
event with a maXimum flow depth of 0 30-feet. See the followmg StormShed and
FlowMaster output for detailed calculatIOns
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Basm 'C'
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StormShed software was used to model the 6-month and roO-year storm events which
resulted m a peak, flow rate of 0 31-cfs and 1 32-cfs, respectIVely
n
II
FlowMaster software was used to determme the mlmmum bottom width of the swale to
treat the 6-month storm event, which resulted m a v-ditch sectIOn. Therefore, a 3-foot
wide by 1I5-foot long swale IS bemg proposed to treat the 6-month storm event with a of
o 54-ft/sec. and a flow depth of 0 15-feet. Also, FlowMaster software was used to
determme that the proposed swale has adequate capacity to convey the lOO-year storm
event with a maXImum flow depth of 0 34-feet See the followmg StormShed and
FlowMaster output for detailed calculatIOns
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Edward's House Assisted Living Facility Preliminary Drainage Report
n
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Stormwater StoragelInfiltration'
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See follOWIng StormShed software modelIng output for storm water storage and
InfiltratIOn results for the three sub-basIns
Storae-e Capacity Summary
BasIn ID ImpervIOus Disturbed Storage (1) Storage
Area PervIOUS Reqmred Provided
Area "Modeling"
BasIn A o 56 ac o 52 ac 10,454 cf 17,518 cf
BasIn B o 43 ac o 45 ac 8,276 cf 10,153 cf
BasIn C o 61 ac o 41 ac 10,454 cf 15,136 cf
TOTAL 1 60 ac 1.38 ac 29,184 cf 42,807 cf
n
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BasIn 'A'
II
Pond Bottom ElevatIOn.
Max. Water Surface ElevatIOn (100-yr storm)
Top Freeboard ElevatIOn.
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3430
3450
3470
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48-Hour Draw down.
(3562 sf) x (20 In/hr) x (1 ft./12 In.) x 48 hI's = 284,960 cf /48 hours
n
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check: 284,960 cf> 10,454 cf OK
II
BasIn 'B'
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II
Pond Bottom ElevatIOn.
Max. Water Surface ElevatIOn (lOO-yr storm)
Top Freeboard ElevatIOn.
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3420
3455
3470
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48- Hour Draw down.
(1279 sf) x (20 m/hr) x (1 ft./12 In.) x 48 hrs = 102,320 cf / 48 hours
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n
checl~ 102,320 cf> 8,276 cf OK
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BasIn 'C'
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Pond Bottom ElevatIOn.
Max. Water Surface ElevatIOn (100-yr storm)
Top Freeboard ElevatIOn
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3420
346 1
3480
n
48-Hour Draw down
(1169 sf) x (20 In/hr) x (1 ft./12 In.) x 48 hI's = 93,520 cf /48 hours
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check 93,520 cf> 10,454 cf OK
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Appendlx II ~
Grac{lng, l)rainage and Eroslon Cpntrol'
_---..J~..~.~__~"'_'_________..:.::.~,_'__.~~
L_ _-----.::.'-----._---'--~_~_"" ~_ ~.~__)_'___,,~.___'___.~ _~'_
StonnShed RepOlt 07/06/00
Project. 000 <;6 Page 1
Basin-A.
Basin-A Event Summary (6 mo)
BasinlD Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (hI's) (ac-ft) ac floss
Basin-A 028 10 00 o 0526 108 SCS/SCS TYPE1 6 mo
Basin-A Event Summary (100 yr)
BasinlD Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (hI's) (ac-ft) ac floss
Basin-A 1 31 10 00 0,2432 108 SCS/SCS TYPE1 100
yr
Control Structure 10 Basin-A-Pond - Infiltration control structure
Descrip Infiltration Pond
Start EI Max EI Increment
343 0000 ft 347 0000 ft 0 10
Infil 2000 infhr Multiplier' 1 00
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Drainage Area Basin-A
Hyd Method SCS Unit Hyd
Peak Factor 484 00
Storm Dur 24 00 hI'S
Area
Pervious 0 5200 ac
Impervious 0 5600 ac
Total 1 0800 ac
Supporting Data
Pervious CN Data
landscaping
Impervious CN Data
Roof
Sidewalk
Pond surface area
Pervious TC Data
Flow type Description
Fixed None Entered
Impervious TC Data
Flow type Description
Fixed None Entered 0 00 ft
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Basin-A-Pond
Infiltration Powl
343 0000 tt
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Node 10
Desc
Start EI
Contrib Basin
Stage
343 00
344 00
345 00
346 00
34700
Input
o 00 cf
4301 29 cf
10117 47 cf
1751824 cl
26562 77 cl
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G Itext\pf\OOOSbc<;tormshed'.OOU'i6070o Joe
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loss Method
SCS Abs
SCS CN Number
020
CN
7400
9800
TC
o 17 hI'S
o 08 hI'S
7400 o 5200 ac
9800 o 3400 ac
9800 o 1000 ac
9800 01200 ac
Lt'l1ljttl Slope Coett Travel Time
o 00 ft 000% 10 0000 1000 min
length Slope Coeff" Travel Time
000% 5 0000 5 00 min
Volume
o 00 ct
4301 29 cf
1011747cf
1751824 cf
26562 77 cf
Max EI 347 0000 tt
Contrib Hyd
Volume
o 0000 acft
o 0987 acft
o 2323 acft
o 4022 acft
o 6098 acft
Sl \ Lllgllleenllg
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StomlShed Report
ProJect. 00056
07/06/00
Page 2
r-)
r-)
Node 10
Desc:
Start EI
Contrib Basin
Storage Id
Basin-A-LP
Infiltration Pond
343 0000 ft
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Basin-A-Pond Discharge Id
Max EI 3470000 ft
Contrib Hyd
Basln-A-Pond
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RLPCOMPUTE [Basln-A-LP] SUMMARY
100 yr MatchQ=PeakQ= 1 3102 cfs Peak Out Q 0 0000 cfs - Peak Stq. 345.06 ft - Active Vol.
0.24 acft
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Basin-B:
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Basin-B Event Summary
BasinlD Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (hI's) (ac-ft) ac floss
Basin-B 0,22 10 00 00407 088 scs/scs TYPE1 6 mo
Basin-B Event Summary
BasinlD Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (hI's) (dc-ft) ac floss
Basin-B 104 10 00 01934 088 scs/scs TYPE1 100
yr
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Drainage Area Basin-B
Hyd Method SCS Unit Hyd
Peak Factor 484 00
Storm Our 24 00 hI'S
Area
Pervious 0 4500 ac
Impervious 0 4300 ac
Total 0 8800 ac
Supporting Data
Pervious CN Data
Landscaping
Impervious CN Data
Parking area, drive aisle, sidewalk
Pond surface area 98 00
Pervious TC Data
Flow type Description
Fixed None Entered
Impervious TC Data
Flow type DescriptIOn
Fixed None Entered
Loss Method SCS CN Number
SCS Abs 0,20
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CN
7400
9800
TC
o 17 hI'S
o 08 rlrs
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7400
o 4500 ac
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9800
o 0700 ac
o 3600 ac
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Length
o 00 ft
Slope
000%
Coeff'
10 0000
Travel Time
1000 min
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Length
o 00 ft
Slope
000%
Coeff'
5 0000
Travel Time
5 00 min
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Control Structure 10 Basin-B-Pond - Infiltration control structure
Oescrip Infiltration Pond
Start EI Max EI Increment
342 0000 ft 347 0000 ft 0 10
Infil 20 00 Infhr Multiplier 1 00
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SlonnShed Report
ProJect. 000'i6
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Node 10' Basin-B-Pond
Oesc Infiltration Pond
Start EI 342 0000 ft
Contrib Basin
Stage
342 00
343 00
344 00
345 00
346 00
34700
Volume
o 00 cf
155599 cf
3707 55 cf
654130cf
10152 49 cf
14645 24 cf
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Input
o 00 cf
1555 99 cf
3707 55 cf
6541 30 cf
1015249cf
1464524 cf
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Node 10 Basin-B-LP
Oesc Infiltration Pond
Start EI. 342 0000 ft
Contrib Basin
Storage Id Basin-B-Pond Discharge Id
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07/06/00
Page 3
Max EI 347 0000 ft
Contrib Hyd
Volume
o 0000 acft
o 0357 acft
00851 acft
o 1502 acft
0.2331 acft
o 3362 acft
Max EI 347 0000 ft
Contrib Hyd
Basln-B-Pond
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RLPCOMPUTE [Basin-B-LP] SUMMARY
100 yr MatchQ=PeakQ= 1 0419 cfs Peak Out Q 00000 cfs - Peak StQ. 345.52 ft - Active Vol.
0.19 acft
Basin-C:
Basin-C Event Summary
BasinlO Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (h rs) (ac-ft) ac floss
Basin-C 031 10 00 o 0563 102 SCS/SCS TYPE1 6 mo
Basin-C Event Summary
BasinlO Peak Q Peak T Peak Vol Area Method Raintype
Event
(cfs) (hI'S) (Clc-rt) ac floss
Basin-C 1 32 1000 o 2443 102 SCS/SCS TYPE1 100
yr
Drainage Area Basin-C
Hyd Method SCS Unit Hyd loss Method SCS CN Number
Peak Factor' 484 00 SCS Abs 020
Storm Our 24 00 hI's
Area CN TC
Pervious 04100ac 7400 o 1 7 tl rs
Impervious 06100 ac 9800 o 08 hI's
Total 1 0200 ac
Supporting Data
Pervious CN Data
Landscaping (on-site) 7400 o 4000 ac
Landscaping (off-site) 7400 00100 ac
Impervious CN Data
Pond 9800 o 0700 ac
Roadway, sidewalk (off-site) 9800 o 3000 ac
Roof 9800 o 2400 ac
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ProJ~ct 000~6 Pag~ 4
Pervious TC Data
Flow type Descnptlon Length Slope Coeff' Travel Time
Fixed None Entered o 00 ft 000% 10 0000 1000 min
Impervious TC Data
Flow type Description Length Slope Coeff' Travel Time
Fixed None Entered o 00 ft 000% 5 0000 5 00 min
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Control Structure ID Basin-C-Pond - Infiltration control structure
Descrip Infiltration Pond
Start EI Max EI Increment
342.0000 ft 347 0000 ft 0 10
Infil 20 00 in/hr Multiplier 1 00
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Node ID. Basin-C-Pond
Desc Infiltration Pond
StartEI: 342 0000 ft
Contrib Basin
Stage
342.00
343 00
344 00
345 00
346 00
347 00
Input
o 00 cf
147616 cf
3602 45 cf
6451 14 cf
10232 17 l-I
1 51 36 46 Lf
Volume
o 00 cf
1476 16 cf
3602 45 cf
6451 1 4 cf
10232'1/Lr
1 5136 46 u
Max EI 347 0000 ft
Contrib Hyd
Volume
o 0000 acft
o 0339 acft
o 0827 acft
o 1481 acft
02349 acft
03475 acft
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n
Node ID
Desc
Start EI.
Contrib Basin
Storage Id
Basm-C-LP
Intlltration Pond
342 0000 ft
n
Basin-C-Pond Discharge Id
Max EI 347 0000 ft
Contnb Hyd
Basin-C-Pond
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RLPCOMPUTE [Basin-C-LP] SUMMARY
100 yr MatchQ=PeakQ= 1 3167 cfs Peak Out Q 00000 cfs - Peak Stq. 346.08 ft - Active Vol.
0.24 acft
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Edward's House Assisted Living Facility
Worksheet for Trapezoidal Channel
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Project Description
Project File
Worksheet
Flow Element
Method
Solve For
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Basin-B - Biofiltration Swale (6 mo )
Trapezoidal Channel
Manning's Formula
Channel Depth
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Input Data
Mannings Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
n
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0070
0014000 ftlft
5 000000 H V
5 000000 H V
3 00 ft
0.22 cfs
n
Results
Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is sub critical.
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011 ft
o 41 ft2
4 17- ft
415 ft
o 05 ft
o 195289 ftlft
o 54 ftls
o 45e-2 ft
012 ft
030
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07/07/00
08'30'15 AM
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Haestad Methods, Inc, 37 Brookside Road Waterbury CT 06708 (203) 755-1666
FlowMaster v5.1 5
Page 1 of 1
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Edward's House Assisted Living Facility
Worksheet for Trapezoiqal Channel
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Project Description
Project File
Worksheet
Flow Element
Method
Solve For
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g.\text\++project files++\00056\f1ow master\00056061 fm2
Basin-B - Biofiltration Swale (100 yr)
Trapezoidal Channel
Manning's Formula
Channel Depth
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Input Data
Mannings Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
n
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n
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0070
o 01 0000 ftlft
5 000000 H V
5 000000 H V
3 00 ft
1 04 cfs
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Results
Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is sub critical
n
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o 30 ft
1.34 ft2
6 04 ft
5 98 ft
014 ft
o 146132 ftlft
o 78 ftls
o 01 ft
031 ft
0.29
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07/07/00
08,31'01 AM
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Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 (203) 755-1666
FlowMaster v5.15
Page 1 of 1
11
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Edward's House Assisted Living Facility
Worksheet for Trapezoidal Channel
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Project Description
Project File
Worksheet
Flow Element
Method
Solve For
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g'\text\++project files++\00056\f1ow master\00056061 fm2
Basin-C - Biofiltration Swale (6 mo )
Trapezoidal Channel
Manning's Formula
Channel Depth
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Input Data
Mannings Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
n
u
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0070
0010000 tuft
5 000000 H V
5 000000 H V
3 00 ft
o 31 cfs
Results
Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is subcritical.
n
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u
11
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11
015 ft
o 58 ft2
4 57 ft
4 54 ft
o 07 ft
o 182685 tuft
o 54 fUs
o 45e-2 ft
016 ft
0.26
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07/07/00
08'31 49 AM
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Haestad Methods, Inc, 37 Brookside Road Waterbury, CT 06708 (203) 755-1666
FlowMaster v5,15
Page 1 of 1
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Edward's House Assisted Living Facility
Worksheet for Trapezoidal Channel
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Project Description
Project File
Worksheet
Flow Element
Method
Solve For
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Basin-C - Biofiltration Swale (100 yr)
Trapezoidal Channel
Manning's Formula
Channel Depth
(I
Input Data
Mannings Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
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1'1
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0070
0010000 ftIft
5 000000 H V
5 000000 H V
3 00 ft
1 32 cfs
n
Results
Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Flow is subcritical
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1'1
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o 34 ft
1 58 ft2
6 45 ft
6 38 ft
017 ft
o 140221 ftIft
o 83 ftls
o 01 ft
o 35 ft
0.29
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07/07/00
08:32:20 AM
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Haestad Methods, Inc. 37 Brookside Road Waterbury CT 06708 (203) 755-1666
FlowMaster v5.15
Page 1 of 1
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THURSTON REGION
FACILITY SUMMARY FORlVl
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Complete one (I) for each faclhty (detentIOn/retentIOn, coalescIng plate filter, etc) on the
project sIte Attach 8 1/2 x II sketch shoWIng locatIon offacihty
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Proponent s Facility Name or Identifier (e.g, Pond A)
See Part 6
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Name of Road or Street to Access Facility
Hearings Examiner Case Number
Development Rev Project No.lBldg Permit No
Killion Road
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Parcel Number
21724120404
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To be completed by Utility Staff:
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Utihty Facihty Number
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ProJect Number (num)
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Parcel Number Status (num, Ich)
0, Known, 1, Pubhc, 2 Unknown, 3, UnassIgned
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BaSIn and SubbaSIn. (num, 6ch)
(2ch for baSIn, 2ch for subbaSIn, 2ch future
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Responsible JunsdIctlOn. (alpha, I ch)
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Part I - Project Name and Proponent
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Project Name
Project Owner
Project Contact
Edward s House Assisted Living Facili(\
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Edward Dobbs
Edward Dobbs
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4ddress PO Box 277 North Plains OR 97133
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Phone. ('ini) fi47_474'i
Project Proponent (if different)
Address Same
Phone Same
Project Engineer Marry li,,~t({(\'nn P F:
Firm. SCA C()1lI'1Ilting lim/(p
Same
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Phone.
n6D! 49:;-6007
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Part 2 - Project LocatIOn
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Section
24
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2E
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Township
Range
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Part 3 - Type of PermIt ApplIcatIOn
Type of perm it (e g, Commercial Bldg)
Other Permits (circle)
Commercial Building
II
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II
DDOF/WHPA
DCOE Wetlands
DFEMA
DShoreUne Mgmt
DEncroachment
DCOE 404
DDOE Dam Safety
DFloodplain
DRockely/Retaining Wall
[glGrading
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DNPDES
DOther Plumbing. Electrical. UtiUn
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Other Agencies (Federal. State Local. etc) that have had or will review this Drainage Erosion
Control Plan.
N/A
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Part 4 -Proposed Project DescnptlOn
What stream basin is this project in (e g Percival. Woodland)
Project Size acres
Zoning
Onsite
Thompson Creek
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2 70
C-I
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Residential Subdivision
N/A
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Number of Lots
Lot size (average), acres
Building Permit/Commercial Plat
Building(s) Footprint, acres
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o 58 (Roof Area)
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Concrete Paving. acres
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Gravel SUlface, acres
Lattice Block Paving, acres
Public Roads (including gravel shouldel) acres
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026
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Private Roads (including sidewalks), acres
Onsite Impervious SUlface Total, acres
050
108
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Part 5 - Pre-Developed Project SIte Charactenstlcs
Stream through sIte, y/n.
Name:
No
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DNR Type:
n
Type of feature thIS facihty dIscharges to (i.e., lake, stream, mtenmttent stream, pothole,
roadsIde dItch, sheetflow to adjacent pnvate property, etc.)
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Infiltration into ground
Swales Ravines, y/n,
No
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n
Steep slopes (steeper than 15%) v/n.
Erosion hazard, y/n.
100 vr Floodplain, y/n.
Lakes or Wetlands y/n.
Seeps/Springs y/n
High Groundwater Table, y/n.
Wellhead Protection or Aquifer
Sensitive Area, y/n.
No
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No
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No
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No
No
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No
No
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Part 6 - FacIlIty DescnptlOn - Infiltration Pond A
Total Area Tributmy to Facility Including Offsite (acres)
Total Onsite Area Tributmy to Facility (acres)
Design Impervious Area Tributmy to Facilin (acres)
Design Landscaped Area Tributary to Facility (acres)
Design Total Tributmy Area to Facility (acres)
Enter a one (1) for the type of facility
Wet pond detention
Wet pond water slllface area, acres
DIY pond detention
Underground detention
Infiltration pond
DIY well infiltration
Coalescing plate separator
Centrifilge separator
108
108
056
052
108
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Other
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Outlet tvpe (Enter a one (1) for each tvpe present)
Filter
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Oil water separator
Single orifice
Multiple orifices
Weir
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Spillway
Pump(s)
Other - Infiltration
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Part 7 - Release to Groundwater
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Design Percolation Rate to Groundwater (if applicable)
20 inches/hour
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Part 6 - FacilIty DescnptIon - Infiltration Pond B
Total Area Tributmy to Facilitv Including OjJsite (acres)
Total Onsite Area Tributarv to Facilitv (acres)
Design Impervious Area Tributarv to Facility (acres)
Design Landscaped Area Tributmy to Facilitv (acres)
Design Total Tributmy Area to Facility (acres)
Enter a one (1) for the type of facility
Wet pond detention
Wet pond water sUlface area, acres
DIY pond retention
Underground retention
Infiltration pond
DIY well infiltration
Coalescing plate separator
Centrifuge separator
Other
088
088
043
045
088
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Outlet ope (Enter a one (1) for each type present)
Filter
Oil water separator
Single orifice
Multiple orifices
Weir
Sp illwa v
Pump(s)
Other - Infiltration
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Part 7 - Release to Groundwater
Design Percolation Rate to Groundwater (if applicable)
20 inches/hour
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Part 6 - FacilIty DescnptJOn - Infiltration Pond C
Total Area Tributary to Faci/ity Including OfJsite (acres)
Total Onsite Area Tributan to Faci/itv (acres)
Design Impervious Area Tributarv to Facilif1. (acres)
Design Landscaped Area Tributmy to Facility (acres)
Design Total Tributm} Area to Facilil) (acres)
Enter a one (1) for the type of facility
Wet pond detention
Wet pond water swface area, acres
Dry pond retention
Underground retention
Infiltration pond
DIY well infiltration
Coalescing plate separator
Centrifuge separator
Other
102
075
061
041
102
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Outlet hope (Enter a one (1) for each type present)
Filter
Oil water separator
Single orifice
Multiple orifices
Weir
Spillwav
Pump(s)
Other - Infiltration
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Part 7 - Release to Groundwater
Design Percolation Rate to Groundwater (if applicable)
20 inches/hour
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Appendix IV -
FEMAFIRM Map
:- ---- -~--~~-~~~----'--------'- ----"" - ~ - --~~-----~ ~--_--":'~-"'-'--"--~-
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PROJECT LOCA TlON l \
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ZONE A
ZONE A AREAS OF 100-YR FLOOD
ZONE C AREAS OF MINIMAL FLOODING
FtGURE
FEMA F\RM MAP
1
EOWAAO'S HOUSE "SSlSlED UVlNG F "ClUT'(
00056
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APpendiX V
scs Soils Map and Sods Lo
~.-'" ---,------'~----
-" '-"- ~~-~-----------
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SOIL SURVEY OF THURSTON COUNTY, WASHINGTON
SHEET NUMBER 24
PROJECT LOCA TlON
NTS
SCS SO\L CLASS\F\CA T\ON
110 SPANAWAY GRAVELLY SANDY LOAM. 0 TO 3% SLOPES
FIGURE
SCS SO\LS MAP
2
EDWARD'S HOUSE ASSlSm> UVlNG FAClUT'i
00056
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SOIL EVALUATION REPORT
FORM 1 GENERAL SITE INFORMATION
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PROJECT TITLE
PROJECT NO 00056
PREPARED BY William W Parnell, P E
1 SITE ADDRESS OR lEGAL DESCRIPTION
9500 Block of Killion Road, Yelm, WA 98597
2 PROJECT DESCRIPTION
Build a 25,000 s f assisted living facility with parking and all associated utilities on a 2 7 acre site.
3 SITE DESCRIPTION
The project site is currently undeveloped and is covered with scotch bloom Topography gently slopes
from east to west.
Edwards House Assisted Living Facility
SHEET 1 OF
DATE 07/01/00
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4 SUMMARY OF SOilS WORK PERFORMED'
Four test pits were excavated by backhoe to a maximum depth of 130" below existing grade Soils
were inspected by entering and visually logging each test pit to a depth of four feet. Test pit tailings
were examined for soils excavated below four feet in depth Double ring infiltration tests were
completed in all test pits Test results and soil log data are included in this report.
5 ADDITIONAL SOilS WORK RECOMMENDED'
Additional soils work should not be necessary unless drainage infiltration facilities are located
appreciable distances from these soils test pits as located on the site plan map
6 FINDINGS
The on-site soils for this project site were mapped by the Soil Conservation Service survey of Thurston
County as a Spanaway(110) series All test pits confirmed this designation Double ring infiltration
tests in test pits A1, A2, Band C revealed infiltration rates of 360, 40, 25 and 57 inches/hour
res ectivel
7 RECOMMENDATIONS
The Span away series soils are very permeable and well drained in the substratum All drainage
infiltration facilities should be located in the C horizon soils For design purposes, use an infiltration
rate less than or equal to 20 inches/hour During construction, care must be taken to prevent erosion
of exposed soils Drainage facility infiltration surface areas must be properly protected from
contamination by the finer grained upper horizon soils and from compaction by construction site
activities Soils not properly protected will cause infiltration facilities to prematurely fail
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DATE
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SOIL EVALUATION REPORT
FORM 2 SOIL LOG INFORMATION
PROJECT TITLE Edwards House Assisted Living SHEET 1 OF 4
PROJECT NO .00056 DATE .06/30/00
PREPARED BY William W Parnell, P E
SOIL LOG #A,
LOCATION See Site Plan
1 TYPES OF TEST DONE. 2, SCS SOILS SERIES 3 LAND FORM
Double Ring Infiltration Spanaway (110) Terrace
4 DEPOSITION HISTORY 5 HYDROLOGIC SOIL 6 DEPTH OF SEASONAL HW
Glacial Outwash GROUp. Greater than bottom of hole
B
7 CURRENT WATER 8 DEPTH TO IMPERVIOUS 9 MISCELLANEOUS
DEPTH LAYER. Linear, Level
Greater than bottom of hole Greater than bottom of hole
10 POTENTIAL FOR. EROSION RUNOFF PONDING
Slight Slow Minimal
11 SOIL STRATA DESCRIPTION See Following chart
12 SITE PERCOLATION RATE Assume 20 inches/hour at a depth of 40 inches or
greater below existing grade
13 FINDINGS & RECOMMENDATIONS A double ring infiltration test was very difficult to
run due to the extreme permeability of the pea gravel strata the test was completed in
Assume a stabilized rate at 360 inches/hour For drainage purposes use an infiltration rate of
20 inches/hour or less for all infiltration facilities with bottoms greater than 40 inches below
existing grade
Soils Strata Description
Soil Log #A1
Harz Depth Color Texture %CL %ORG CF STR MOT IND CEM ROO <X> FSP
A 0"-24 10YR2/1 GrExFSaLm <10 <5 <20 1SBK ff 2-6 2
Bw 24"-40" 10YR3/4 ExGrLmSa <5 <65 SG ff 2-6 6
w/many
cobbles
C, 40" -64" 10YR5/1 PeaGr <95 SG >20 20
w/some
cobbles
C2 64 -90" 10YR4/6 VGrFSa <55 SG >20 20
w/some
cobbles
C3 90"-110" 10YR4/1 VGrC-MSa <60 SG >20 20
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SOIL EVALUATION REPORT
FORM 2 SOIL LOG INFORMATION
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PROJECT TITLE Edwards House Assisted Living SHEET 2 OF 4
PROJECT NO '00056 DATE '06/30/00
PREPARED BY William W Parnell, P E
SOIL LOG. #A2
LOCATION See Site Plan
1 TYPES OF TEST DONE 2. SCS SOILS SERIES 3 LAND FORM:
Double Ring Infiltration Spanaway (110) Terrace
4 DEPOSITION HISTORY 5 HYDROLOGIC SOIL 6 DEPTH OF SEASONAL HW
Glacial Outwash GROUP' Greater than bottom of hole
B
7 CURRENT WATER 8 DEPTH TO IMPERVIOUS 9 MISCELLANEOUS
DEPTH LAYER. Linear, Level
Greater than bottom of hole Greater than bottom of hole
10 POTENTIAL FOR. EROSION RUNOFF PONDING
Slight Slow Minimal
11 SOIL STRATA DESCRIPTION See Following chart
12 SITE PERCOLATION RATE Assume 20 inches/hour at a depth of 32 inches or
greater below existing grade
13 FINDINGS & RECOMMENDATIONS A double ring infiltration test was completed at 48
inches below existing grade and revealed an infiltration rate of 40 inches/hour For drainage
design purposes, use an infiltration rate less than or equal to 20 inches/hour for all facilities
with bottoms greater than 32 inches below existing grade
11
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Soils Strata Description
Soil Log #A2
Harz Depth Color Texture %CL %ORG CF STR MOT IND CEM ROO <X> FSP
A 0"-24" 10YR2/1 GrExFSaLm <10 <5 <20 1SBK ff 2-6 2
Bw 24 -32" 10YR3/2 VGrFSaLm <5 <40 SG ff 2-6 6
C1 32"-60" 10YR3/6 VGrLmFSa <55 SG >20 20
w/some
cobbles
C2 60"-100" 1 OYR3/6 ExCobSa <80 SG >20 20
w/some
stones
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SOIL EVALUATION REPORT
FORM 2 SOIL LOG INFORMATION
PROJECT TITLE Edwards House Assisted Living SHEET 3 OF 4
PROJECT NO 00056 DA TE.06/30/00
PREPARED BY William W Parnell, P E
SOIL LOG #B
LOCATION See Site Plan
1 TYPES OF TEST DONE 2, SCS SOILS SERIES 3 LAND FORM:
Double Ring Infiltration Spanaway (110) Terrace
4 DEPOSITION HISTORY 5 HYDROLOGIC SOIL 6 DEPTH OF SEASONAL HW
Glacial Outwash GROUP' Greater than bottom of hole
B
7 CURRENT WATER 8 DEPTH TO IMPERVIOUS 9 MISCELLANEOUS
DEPTH LAYER. Linear, Level
Greater than bottom of hole Greater than bottom of hole
10 POTENTIAL FOR. EROSION RUNOFF PONDING
Slight Slow Minimal
11 SOIL STRATA DESCRIPTION See Following chart
12 SITE PERCOLATION RATE Assume 20 inches/hour at a depth of 30 inches or
greater below existing grade
13 FINDINGS & RECOMMENDATIONS A double ring infiltration test was completed at
72" below existing grade and revealed an infiltration rate of 25 inches/hour For drainage
design purposes use an infiltration rate less than or equal to 20 inches/hour for all facilities
with bottoms greater than 30 inches below existing grade
Soils Strata Description
Soil Log #B
Harz Depth Color Texture %CL %ORG CF STR MOT IND CEM ROO <X> FSP
A 0"-24" 10YR2/1 GrExFSaLm <10 <5 <45 1SBK ff 2-6 4
w/many
cobbles
Bw 24"-30" 10YR3/2 GrExFSaLm <10 <40 1SBK ff 2-6 6
w/many
cobbles
C1 30"-40" 10YR3/3 ExGrLmFSa <70 SG >20 20
w/many
cobbles
Cz 40"-88" 10YR3/6 ExGrFSa <70 SG >20 20
C3 88"-115" 10YR4/1 ExGrSa <70 SG >20 20
w/cobbles
and some
stones
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SOIL EVALUATION REPORT
FORM 2. SOIL LOG INFORMATION
PROJECT TITLE. Edwards House Assisted Living SHEET 4 OF 4
PROJECT NO '00056 DATE '06/30100
PREPARED BY William W Parnell, P E
SOIL LOG #C
LOCATION See Site Plan
1 TYPES OF TEST DONE 2. SCS SOILS SERIES 3 LAND FORM
Double Ring Infiltration Spanaway (110) Terrace
4 DEPOSITION HISTORY 5 HYDROLOGIC SOIL 6 DEPTH OF SEASONAL HW
Glacial Outwash GROUp. Greater than bottom of hole
B
7 CURRENT WATER 8 DEPTH TO IMPERVIOUS 9 MISCELLANEOUS
DEPTH LAYER. Linear, Level
Greater than bottom of hole Greater than bottom of hole
10 POTENTIAL FOR. EROSION RUNOFF PONDING
Slight Slow Minimal
11 SOIL STRATA DESCRIPTION See Following chart
12 SITE PERCOLATION RATE Assume 20 inches/hour at a depth of 30 inches or
greater below existing grade
13 FINDINGS & RECOMMENDATIONS A double ring infiltration test was completed at 96
inches/below existing grade and revealed an infiltration rate of 57 inches/hour For drainage
design purposes, use an infiltration rate less than or equal to 20 inches/hour for all facilities
with bottoms greater than 30 inches below existing grade
Soils Strata Description
Soil Log #C
Harz Depth Color Texture %CL %ORG CF STR MOT IND CEM ROO <X> FSP
A 0"-18" 10YR2/1 GrExFSaLm <10 <5 <20 1SBK ff 2-6 2
Bw 18"-30" 10YR3/2 ExGrFSaLm <5 <70 SG ff 2-6 15
C1 30" -40" 10YR3/4 ExGrFSa <70 SG >20 20
C2 40"-58" 10YR5/1 ExGrCSa <85 SG >20 20
C3 58"-84 10YR4/1 ExGrSa <90 SG >20 20
w/cobbles
and some
stones
C4 84"-130" 10YR4/1 ExGrM-FSa <70 SG >20 20
w/some
cobbles
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(Abbreviations)
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Textural Class Structure Grades of Structure
Cobbley -Cob Granular - Gr Strong -3
Stoney - St Blocky - Blky Moderate - 2
Gravelly - Gr Platy - PI Weak - 1
Sandy - Sa Massive - Mas
Loamy -Lm Single Grained - SG
Silty - Si Sub-Angular Blocky - SBK
Clayey - CI
Coarse -C
Very -V
Extremely - Ex
Fine - F
Medium -M
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Induration & Cementation
Weak -Wk
Moderate - Mod
Strong - Str
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Mottles
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1 Letter Abundance 1 st Number Size 2nd Letter Contrast
Few - F Fine - 1 Faint - F
Common -C Medium - 2 Distinct -0
Manv -M Coarse -3 Prominent -P
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1 st Letter Abundance 2nd Letter Size
Few - f Fine - f
Common - c Medium -m
Many -m Coarse -c
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EDWARD'S HOUSE ASSISTED LIVING FACILITY
DOUBLE RING INFILTRATION TEST
Test Date 6/30/00
Completed By Wilham Parnell, P E.
seA #00056
DOUBLE RING INFIL TRA TION TEST RESULTS
Test Hole # B (Test run @ 72" below existing ground surface)
Start Stop Elapsed Time Total Drop Infiltration Rate
(Min) (Min) (Min) ( Inches) ( In/Hr )
0 7' 15" 7' 15" 6
7' 15" 15' 45" 8' 30" 6
15' 45" 25' 00" 9' 15" 6
25' 00" 36' 30" 11' 30" 6
36' 30" 48' 00" 11' 30" 6
48' 00" 1 00'00" 12' 00" 6
1 00'00" 1 12'30" 12' 30" 6
1 12'30" 1.26'00" 13' 30" 6
1 26'00" 1 40' 00" 14' 00" 6
1 40' 00" 1 54' 00" 14' 00" 6 25
SpecIal Note Pre-test not necessary due to sandy texture of soils, no silts
or clays present.
DOUBLE RING INFIL TRA TION TEST RESULTS
Test Hole # C (Test run @ 96" below existing ground surface)
Start Stop Elapsed Time Total Drop Infiltration Rate
(Min) (Min) (Min) ( Inches) ( In/Hr )
0 l' 30" l' 30" 6
l' 30" 3' 30" 2' 00" 6
3' 30" 6' 30" 3' 00" 6
6' 30" 9' 30" 3' 00" 6
9' 30" 12' 30" 3' 00" 6
12' 30" 16' 15" 3' 45" 6
16' 15" 20' 45" 4' 30" 6
20' 45" 25' 15" 4' 30" 6
25' 15" 30'15" 5' 00" 6
30' 15" 35' 45" 5' 30" 6
35' 45" 41' 00" 5' 15" 6
41' 00" 46' 15" 5' 15" 6
46' 15" 52' 30" 6' 15" 6
52' 30" 58' 45" 6' 15" 6 57
58' 45" 1 04' 45" 6' 00" 6
Special Note Pre-test not necessary due to sandy texture of sOils, no silts
or clays present.
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EDWARD'S HOUSE ASSISTED LIVING FACILITY
DOUBLE RING INFILTRATION TEST
Test Date 6/30/00
Completed By William Parnell, P E.
seA #00056
DOUBLE RING INFIL TRA TION TEST RESUL TS
Test Hole # A1 (Test run @ 48" below existing ground surface)
Start Stop Elapsed Time Total Drop Infiltration Rate
(Min) (Min) (Min) ( Inches) ( In/Hr )
0 15s 15s 6
15s 30s 15s 6
30s 45s 15s 6
45s 1'00" 15s 6 1440
II Special Note Pre-test not necessary due to coarse texture of soils
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Start Stop Elapsed Time Total Drop Infiltration Rate
(Min) (Min) (Min) ( Inches) ( In/Hr )
0 4' 15" 4' 15" 6
4' 15" 9' DO" 4'45" 6
9' DO" 14' DO" 5' DO" 6
14' DO" 19' 15" 5' 15" 6
19' 15" 25' 45" 6' 3D" 6
25' 45" 33' DO" l' 15" 6
33' DO" 40' 45" l' 45" 6
40' 45" 49' 15" 8' 3D" 6
49' 15" 58' DO" 8' 45" 6
58' DO" 1 01' DO" 9' DO" 6
1 01' DO" 1 16' DO" 9' DO" 6 40
Special Note Pre-test not necessary due to coarse texture of soils
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36" -72"
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24" -32"
32" -72"
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30" -72"
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On-Site System Soils Analysis
Apnl 6, 2000
WillIam Parnell
SCA Engmeenng
Hentage House Assisted Llvmg FacilIty
(See attached map for sOli log locatIOns)
Test Hole # 1
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
YellOWIsh/Brown Extremely Gravelly Sand
Test Hole #2
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Grayish Brown Extremely Gravelly Sand
YellOWIsh/Brown Extremely Gravelly Sand
Test Hole #3
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
YellOWIsh/Brown Extremely Gravelly Sand with
Many Cobbles
Test Hole #4
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
YellOWIsh/Brown Extremely Gravelly Loamy Sand with
Many Cobbles
Gray Extremely Gravelly Coarse-MedIUm Sand with
Many Cobbles
YellOWIsh/Brown Extremely Cobbley Sand w/ Some Stones
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SCA Consulting Group
April 2000
Page 1 of 3
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Hentage House Assisted Llvmg FacilIty
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Test Hole #5
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Depth
0"-18"
18" -30"
30" -40"
40" -62"
62" -80"
80" -100"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Dark Brown Very Gravelly Fme Sandy Loam
YellowIsh/Brown Extremely Gravelly Loamy Sand
Gray Cobbley Gravel
YellowIsh/Brown Cobbley Fme Sand with Some Gravels
Dark Gray Gravelly Coarse-MedIUm Sand
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Test Hole #6
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Depth
0"-24"
24" -60"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Bark YellowIsh/Brown Extremely Cobbley Loamy Fme Sand
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Depth
0"-18"
18" -30"
30" -40"
40" -52"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Dark Brown Extremely Gravelly Fme Sandy Loam
YellowIsh/Brown Extremely Gravelly Fme Sand
Gray Extremely Gravelly Coarse Sand
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Test Hole #8
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0"-18"
18" -32"
32" -46"
46" -68"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Dark Brown Loamy Very Fme Sand
Dark YellowIsh/Brown Loamy Fme Sand
OlIve Brown Extremely Cobbley Very Fme Sand
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Test Hole #9
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Depth
0"-32"
32" -48"
48" -60"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam
Dark YellowIsh/Brown Extremely Cobbley Fme Sand
Gray Extremely Gravelly Coarse-MedIUm Sand with Cobbles
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Test Hole #10
32" -60"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam with Many
Cobbles
Dark YellowIsh/Brown Extremely Gravelly Loamy Coarse
Sand with Some Stones
Gray Extremely Gravelly Coarse Sand with Cobbles
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Depth
0"-24"
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24" -32"
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SCA Consulting Group
April 2000
Page 2 of 3
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Hentage House Assisted LIVmg FacilIty
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Test Hole #11
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40" -66"
Texture and Color
Black Gravelly Extremely Fme Sandy Loam with Many
Cobbles
YellowlshlBrown Extremely Gravelly Loamy Fme Sand with
Many Cobbles
Gray Extremely Gravelly Sand with Many Cobbles
Depth
0"-24"
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SCA Consulting Group
April 2000
Page 3 of 3
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PROJECT INFORMA TlON:
Sec. 24, T 17N, R. 1E
lot 3
Tax Parcel No, 21724120404
lEGAL DESCRIPTlON
lot 3 of Short Plot
No, SS-8016 os recorded
under Auditor s File No,
8706180112 in Volume 22,
Page 231 of Short Sub-
divisions. records of Thurston
County, Washington.
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Mike Edwards
920 East Bay Dr N,E,
Olympia, WA, 98506
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lot Size: 2,5 AC.
PARKING,
Required
1 stall per 2 beds
40 Beds = 20 stall s
1 stall per each employee
12 employees = 12 stalls
Total Stalls Required 32
Total Stoll Provided 37
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WELL
N88'29' 38"W 333,63
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Building Size
Zone
Power
Gas
Water
Sewer
Cable
31,594 Sq, Ft,
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PSE
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City of Yelm
City of Yelm
AT&T
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NOTE,
Building Foot Print By:
Benner Stange Associates
Architects, P C.
lake Oswego, OR, 97035
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