HomeMy WebLinkAboutRS_Wetland Final Tech Memo_080329
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 1 of 25
2907 Harborview Drive, Suite D
Gig Harbor, WA 98335
Technical Memorandum
To: Jill Ding, City of Renton File Number: 1190.0015
From: Jon Pickett, Soundview Consultants LLC Date: March 20, 2018
Re: Wetland and Fish and Wildlife Habitat Assessment
601 Monster Road SW, Renton, Washington
Dear Mrs. Ding,
Soundview Consultants LLC (SVC) conducted a wetland and fish and wildlife habitat assessment of
an approximately 9.62-acre property located at 601 Monster Road Southwest, in the City of Renton,
Washington (Figure 1), for DCT Monster Road LLC (Applicant). The property consists of one parcel
located in the Northwest ¼ of Section 24, Township 23 North, Range 4 East, W.M. (King County
Tax Parcel Number 2423049008). This assessment was conducted to support the proposed industrial
redevelopment of the subject property. SVC investigated the site to evaluate if any potentially-
regulated wetlands, fish and wildlife habitat, or other critical areas are located on or adjacent to the
subject property. This Technical Memorandum has been prepared to document the results of this
wetlands, fish and wildlife habitat assessment.
Figure 1. Subject Property Location.
Subject Property
Location
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Project Description
The Applicant proposes industrial redevelopment of the subject property to include demolition of the
existing 143,862-square-foot tilt-up warehouse and construction of an approximately 164,000-square-
foot building with associated infrastructure. The existing concrete tilt-up warehouse is currently
vacant and was most recently used by Graphic Packaging with a small portion utilized as a single-story
office. To the south of the main building is a small shop. The developed portions of the site are
generally flat and allowed for maneuverability of large trucks. Redevelopment of the site will involve
reconfiguring the building footprint to increase functionality, clear height and floor area, as well as all
new site utility infrastructure. The proposed building is a 32-foot interior clear height tilt-up
warehouse. The site and building footprint are designed to incorporate a 4-foot deep truck well along
the east docking area of the building. Paved vehicle parking throughout the site will meet required stall
quantities and truck trailer stalls will be added in the truck court operations area. The proposed project
is a speculative warehouse development.
Historical Stormwater, Hydrology and Pump Infrastructure (Wetland A and B)
A prior Technical Information Report (Appendix C) prepared for the adjacent property to the west
identifies Wetland A and Wetland B as managed storm ponds which were retrofitted with a pump
discharge system to control the pond water levels. The subject property and the surrounding
properties within the same drainage basin are part of an existing regional detention facility pump
station agreement created in 1995, which mitigates the stormwater quantity aspect of the overall
stormwater management for the properties within this basin. The peak discharge rate for the pump is
set to be equal to 50-percent of the existing 2-year 24-hour storm level flow. The pump control system
was set to maintain pond level at an elevation of 11-feet above sea level. The outfall for the pump
system is located at the P-1 channel just upstream from its confluence with the Green River (Appendix
C). A monitoring system was installed at the river to automatically shut the pump system off when the
river is running at 12,000 cubic feet per second, per requirements of the Green River Flood Control
Zone District.
The proposed project will expand the existing building's footprint by approximately 20,000-square
feet and the total pollution generating impervious surfaces will be expanded by approximately 48,000-
square feet. The proposed project will provide water quality treatment for the impervious surfaces
through on-site oil/water separator with a coalescing plate and a water quality filter vault before
discharging to the regional stormwater facility. Roof run-off will continue to be directly discharged to
the existing site discharge point which connects to the regional stormwater facility. The increased
volume in treated stormwater to discharge into the stormwater facility is not anticipated to negatively
impact Wetlands A and B since the water level of the wetlands are artificially controlled and the
stormwater to be discharged is direct roof run-off or will be treated. Further, the proposed project is
not anticipated to negatively impact any potentially-regulated wetlands or fish and wildlife habitat in
any way, as no direct or indirect impacts to these critical areas are anticipated from the proposed
project activities. The project is entirely outside of any wetlands and/or associated buffers as well as
the Federal Emergency Management Agency (FEMA) floodplain area associated with the nearby Black
River. Best management practices (BMPs) and temporary erosion and sediment control (TESC)
measures will be implemented for the duration of the construction activities to minimize any potential
impacts to critical areas.
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Background
Prior to the site investigation, SVC conducted background research using King County Geographic
Information System (GIS) data, Washington Department of Fish and Wildlife’s (WDFW) Priority
Habitat and Species (PHS) database and SalmonScape mapping tool, the U.S. Fish and Wildlife Service
(USFWS) National Wetland Inventory (NWI), Natural Resources Conservation Service (NRCS) Soil
Survey map, and Washington Department of Natural Resources (DNR) stream typing map. All critical
area determinations were made using observable vegetation, hydrology, and soils in conjunction with
data from the U.S. Geographic Survey (USGS) topographic maps, NRCS, USFWS, National Oceanic
and Atmospheric Administration (NOAA) precipitation data, and various orthophotographic
resources. Background maps are provided in Attachment B.
The King County sensitive areas map (Attachment B3), USFWS NWI map (Attachment B4), WDFW
PHS map (Attachments B5), and City of Renton wetland and stream inventory map (Attachment B6)
do not identify any wetlands on the subject property; however, these maps along with the DNR stream
typing map (Attachment B7) identify the Black River located approximately 230 offsite to the north,
across Monster Road Southwest. The WDFW SalmonScape map (Attachment B8) and PHS map
identify documented presence of fall chinook, coho, and winter steelhead as well as modeled presence
of fall chum within the Black River; the WDFW PHS map also identifies resident coastal cutthroat
trout occurrence within the Black River. In addition, the City of Renton wetland and stream inventory
map identifies two potential wetland units approximately 200 feet west (Wetland B) and southwest
(Wetland A) of the subject property that is consistent with the WDFW PHS map, and one potential
wetland approximately 300 feet to the east of the site. Further, the WDFW PHS map identifies an
approximately 108-acre Biodiversity Area and Corridor (i.e., Renton Riparian Forest) to the north of
the subject property, across Monster Road Southwest. This mapped Biodiversity Area contains the
Black River, waterfowl concentrations, and potential wetland aquatic habitat.
According to the NRCS Soil Survey for King County, the majority of the soil on the subject property
is Urban Land, where the native soil layers are disturbed and have 3 to 12 feet of added fill material
to accommodate large development. The remaining areas of the subject property have soils that
consist of Beausite gravelly sandy loam, 6 to 15 percent slopes; Puget silty clay loam; Puyallup fine
sandy loam; and Woodinville silt loam. These soils are all considered hydric or have hydric inclusions
according to the King County Hydric Soils List (NRCS, 2001).
Prior Submitted Wetland Studies
A wetland assessment report was completed in 2009 (J. S. Jones and Associates, 2009) for the
neighboring parcels (King County tax parcel numbers 2423049122 and 2423049123), and a Critical
Area Determination Report was completed by Wetland Resources (Wetland Resources, 2014) to re-
evaluate wetland presence in these areas. Both studies identified two wetland units approximately 200
feet west of the subject property. The previously identified Wetlands A and B are rated as Category
III palustrine, depressional wetland units.
Precipitation
Precipitation data was obtained from the NOAA weather station at Seattle-Tacoma International
Airport to obtain percent of normal precipitation during and preceding the investigation. A summary
of data collected is provided in Table 1.
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Table 1. Precipitation Summary1.
Date Day
of Day
Before 1 Week
Prior 2 Weeks
Prior Last 30 Days
(Observed/Normal) Year to Date
(Observed/Normal)2 Percent of
Normal3
03/05/18 0.26 0.13 0.50 0.85 1.85/3.89 29.48/25.12 47/117
Notes:
1. Precipitation volume provided in inches. Data obtained from NOAA (http://w2.weather.gov/climate/xmacis.php?wfo=sew).
2. Year-to-date precipitation is for the 2017/2018 water year from October 1st to the onsite date(s).
3. Percent of Normal shown for the last 30 days and year-to-date for the 2017/2018 water year.
During the site investigation on March 5, 2018, precipitation levels were well below statistical normal
for the prior 30 days (47 percent), and 117 percent of normal levels for the 2017/2018 water year.
Such conditions were considered in making professional wetland determinations.
Methods
A formal site investigation was performed by qualified SVC staff in March of 2018. The investigation
consisted of a walk-through survey of the subject property and any publicly accessible areas within
200 feet of the property for potentially-regulated wetlands per Renton Municipal Code (RMC) 4-3-
050F.2.e.i; and within 100 feet for potentially-regulated streams per RMC 4-3-050F.2.c and priority
habitats and species.
Wetlands, streams, and select fish and wildlife habitat and species are regulated features by the City of
Renton under RMC Title IV, Chapter 3 – Environmental Regulations and Overlay Districts, and are
subject to restricted uses/activities under the same title. Wetland presence/absence was determined
in accordance with RMC 4-3-050G.9 and the U.S. Army Corps of Engineers (USACE) Wetlands
Delineation Manual (Environmental Laboratory, 1987), as modified according to the guidelines
established in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western
Mountains, Valleys, and Coast Region, Version 2.0 (USACE, 2010). Offsite wetland boundaries were
informally determined through aerial imagery, LIDAR exhibits and offsite observations as access to
these areas were not granted.
The offsite wetlands were classified using both the hydrogeomorphic (Brinson, 1993) and Cowardin
(Cowardin et al, 1979; Federal Geographic Data Committee, 2013) classification systems. Following
classification, wetlands were assessed and categorized using the current Washington State Wetland Rating
System for Western Washington (Hruby, 2014) and guidelines established in RMC 4-3-050 (9)(c).
The fish and wildlife habitat assessment was conducted during the same site visit by qualified fish and
wildlife biologists. Experienced biologists made visual observations using stationary and walking
survey methods for both aquatic and upland habitats noting any special habitat features or signs of
fish and wildlife activity.
Results
The subject property is a fully developed site consisting entirely of paved surfaces,
industrial/commercial buildings and associated infrastructure and landscaping. Onsite vegetation
consists of sparsely planted ornamental and native trees and shrubs in landscaping strips and a
maintained lawn area on the northern portion of the site. The site is generally flat as extensive grading
was performed prior to the existing industrial warehouse development. The developed portions of the
site are generally flat and allow for the maneuverability of large trucks. There is a portion of the site
used for vehicle parking to the southeast of the building that is slightly elevated. Beyond the southern
development limits of the site the grade climbs toward and onto the adjacent land parcel. A King
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County contours map is provided in Attachment B1. The site is bounded by Monster Road Southwest
to the north and east and commercial/industrial warehouses to the south and west.
No potentially-regulated wetlands and/or fish and wildlife habitat were observed on the subject
property.
Offsite Features
Two potentially-regulated wetlands (Wetlands A and B) were observed offsite within 200 feet of the
subject property; no Category I or II wetlands were observed within 300 feet of the site per RMC 4-
3-050F.2.e.i. The identified wetlands exhibited indicators of wetland hydrology and a predominance
of hydrophytic vegetation according to current wetland delineation methodology; no soil pits were
excavated to confirm hydric soils as the identified wetlands are offsite and the prior wetland reports
confirm the presence of wetland soil criteria (J. S. Jones and Associates, 2009; Wetland Resources,
2014). The rating forms and rating maps are provided in Attachments D and E, respectively. A
summary of the wetlands identified offsite is provided in Table 1 below.
Table 1. Offsite Wetlands Summary.
Wetland Predominant Wetland Classification / Rating Wetland Size
(acres)
Buffer Width
(feet)5 Cowardin1 HGM2 WSDOE3 City of Renton4
A PFO/SS/
EMC
Depressional III III 1.27 75
B PFO/SS/
EMCH
Depressional III III 3.41 75
Notes:
1. Cowardin et al. (1979) Federal Geographic Data Committee 2013 or NWI Class based on vegetation: PFO= Palustrine Forested; PSS=
Palustrine Scrub-Shrub; PEM = Palustrine Emergent; Modifiers for Water Regime or Special Situations: C= Seasonally Flooded, H=Permanently
Flooded.
2. Brinson, M. M. (1993).
3. WSDOE rating according to Washington State Wetland Rating System for Western Washington (Hruby, 2014).
4. RMC 4-3-050 (9)(c) definition.
5. RMC 4-3-050G.2 buffer standards.
Wetland A
Wetland A is located offsite in the northern portion of Parcel -9123 and is approximately 55,500 square
feet (1.27 acres) in size. Hydrology for Wetland A is provided by a seasonally high groundwater table,
direct precipitation, and sheet flow. The dominant vegetation in this wetland is red alder (Alnus rubra),
paper birch (Betula papyrifera), Pacific willow (Salix lasiandra), broadleaf cattail (Typha latifolia), and reed
canarygrass (Phalaris arundinacea). Wetland A is a Palustrine Forested, Scrub-Shrub, and Emergent,
Seasonally Flooded depressional wetland (PFO/SS/EMC). Wetland A is a Category III wetland with
a habitat score of 4 points, which is subject to a standard 75-foot buffer per RMC 4-3-050G.2.
Wetland B
Wetland B is located offsite on Parcels -9122 and -9120 and is approximately 148,500 square feet (3.41
acres) in size. Hydrology for Wetland B is provided by a stormwater discharge through a culvert in
the western portion of the wetland, a seasonally high groundwater table, direct precipitation, and sheet
flow. In addition, there is a pump system installed that regulates the water depth in Wetland B. The
dominant vegetation in this wetland is red alder, paper birch, Pacific willow, and broadleaf cattail.
Wetland B is a Palustrine Forested, Scrub-Shrub and Emergent Permanently and Seasonally Flooded
depressional wetland (PFO/SS/EM/CH). Wetland B is a Category III wetland with a habitat score
of 4 points, which is subject to a standard 75-foot buffer per RMC 4-3-050G.2.
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On the eastside of Monster Road Southwest is Waterworks Gardens which consists of artificially
constructed stormwater ponds created after 1990, and is surrounded by paved walking paths and tree
and shrub plantings. The artificial, intentionally-created stormwater ponds would not be regulated
wetlands per RMC 4-3-050.B.1:
Regulated wetlands do not include those artificial wetlands intentionally created from nonwetland sites,
including, but not limited to, irrigation and drainage ditches, grass-lined swales, canals, detention facilities,
wastewater treatment facilities, farm ponds, and landscape amenities, or those wetlands created after July 1,
1990, that were unintentionally created as a result of the construction of a road, street, or highway.
Fish and Wildlife Species and Habitat
As noted above, the Black River is offsite approximately 230 feet to the north of the subject property
on the opposite side of Monster Road Southwest. The associated 108-acre Biodiversity Area and
Corridor (i.e., Renton Riparian Forest) is likewise confined to the North side of Monster Road
Southwest and does project onto the subject property.
Conclusions
No potentially-regulated wetlands, fish and wildlife habitat, or other regulated aquatic features were
identified on the subject property during the site investigation; however, two wetlands (Wetlands A
and B) were identified approximately 200 feet to the west and southwest of the site. The associated
buffers for Wetland A and B do not project onto the subject property. As such, it appears that any
industrial redevelopment of the subject property would not be encumbered by any potentially-
regulated wetlands, fish and wildlife habitat, and/or associated buffers, and the proposed project is
not anticipated to negatively impact any potentially-regulated wetlands or fish and wildlife habitat.
If you have any further questions please contact us at your earliest convenience.
Sincerely,
____________________________ March 20, 2018
Jon Pickett Date
Senior Environmental Planner/Project Manager
Soundview Consultants LLC
2907 Harborview Drive, Suite D
Gig Harbor, WA 98335
(253) 514-8952 Office
(253) 514-8954 Fax
Jon@soundviewconsultants.com
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References
Brinson, M. M. 1993. A hydrogeomorphic classification for wetlands, Technical Report WRP-DE-4. U.S. Army
Engineer Waterways Experiment Station. Vicksburg, Mississippi.
Cooke, S.S. 1997. Wetland Plants of Western Washington. Seattle Audubon Society. Seattle, Washington.
Cowardin, L.M. V. Carter, F. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater
Habitats of the United States. U.S. Fish and Wildlife Service. Washington D.C.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-
87-1, US Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
Federal Geographic Data Committee. 2013. Classification of Wetlands and Deepwater Habitats of the
United States. FGDC-STD-004-2013. Second Edition. Wetlands Subcommittee, Federal
Geographic Data Committee and U.S. Fish and Wildlife Service, Washington, DC.
Hitchcock, C.L. and A. Cronquist. 1973. Flora of the Pacific Northwest. University of Washington Press.
Seattle, Washington.
Hruby, T. 2014. Washington State Wetland Rating System for Western Washington: 2014 Update.
(Publication #14-06-029). Olympia, WA: Washington Department of Ecology.
J. S. Jones and Associates. 2009. Wetland Assessment of the Seattle Area Plumbing and Pipefitting Property.
Auburn, Washington. March 25, 2009.
Lichvar, R.W., D.L. Banks, W.N. Kirchner, and N.C. Melvin. 2016. The National Wetland Plant List:
2016 wetland ratings. Phytoneuron 2016-30: 1-17. Published 28 April 2016. ISSN 2153 733X.
Munsell Color. 2000. Munsell Soil Color Charts. New Windsor, New York.
Natural Resource Conservation Service (NRCS). 2001. Hydric Soils List: King County, Washington.
U.S. Department of Agriculture. Washington D.C.
Null, W., G. Skinner, and W. Leonard. 2000. Wetland Functions Characterization Tool for Linear
Projects. Washington State Department of Transportation.
Renton Municipal Code (RMC). 2018. Title IV, Chapter 3 – Environmental Regulations and
Overlay Districts. Passed January 22, 2018.
Sheldon, D., T. Hruby, P. Johnson, K. Harper, A. McMillan, T. Granger, S. Stanley, and E. Stockdale.
2005. Wetlands in Washington State - Volume 1: A Synthesis of the Science. Washington State
Department of Ecology. Publication #05-06-006. March, 2005. Olympia, Washington.
Snyder, Dale E., Gale, Philip S., and Pringle, Russell F. 1973. Soil Survey of King County Area,
Washington. Soil Conservation Service.
U.S. Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation
Manual: Western Mountains, Valleys, and Coast Region (Version 2.0), ed. J. S. Wakeley, R. W. Lichvar,
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 8 of 25
and C. V. Noble. ERDC/EL TR-10-13. Vicksburg, MS: U.S. Army Engineer Research and
Development Center.
United States Department of Agriculture, Natural Resources Conservation Service. 2017. Field
Indictors of Hydric Soils in the United States, Version 8.1. L.M. Vasialas, G.W. Hurt, and C.V. Noble (eds.).
USDA, NRCS, in cooperation with the National Technical Committee for Hydric Soils.
Wetland Resources. 2014. Critical Area Determination Report for King County Parcels #2423049122 and
2423049123. Everett, Washington. September 8, 2014.
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Attachment A – Site Plans
Pictometry International Corp. 2015
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
DCT MONSTER ROAD - EXISTING CONDITIONS
¢PRELIMINARYINFORMATION ONLYNOT FOR CONSTRUCTIONSOUNDVIEW CONSULTANTS LLC ASSUMESNO LIABILITY OR RESPONSIBILITY FORCONSTRUCTION, IMPROVEMENTS, ORESTIMATES BASED ON THIS PLAN SET
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO.
3/26/2018
1190.0015
DLS
1
0 225 450112.5 Feet
1 " = 225 '
Existing
Building
Black River
àààààààààààààààà
àààà
àààà
àààà
àààà
Wetland
75' Category IIIWetland Buffer
Site Boundary
Wetland BCategory III
Wetland ACategory III
Black RiverType S Stream
ABCA0.2A0.2CBAD
R
A
F
TProposedSite PlanA0.111Project InformationNSite Area = 9.61 Acres (418,768 SF)Parcel(s) = 242304-9008Zoning = IM, Industrial MediumSite Address:601 Monster Road SWRenton, WASetbacks:Street Front Required= 20' (Principal Art.)Street Front Provided
1RUWKStreet Side Required= 20' (Principal Art.)Street Side Provided
(DVWSide Int/Rear Required= 0'Side Int/Rear Provided
PLQExisting Building Footprint Area= 143,862 SFProposed Building Footprint Area = 164,480 SFProposed Building Area Increase= 18,688 SF (12.99%)Future Office Area Allowance = 8,000 SF (5%)Warehouse Area = 154,550 SFType of Construction = 5BFire Protection = Sprinklers ThroughoutExisting Impervious= 102,549 SFExisting Building Areas= 146,617 SFTotal Existing Impervious 6) Proposed Impervious= 150,793 SFProposed Building Areas (Footprint)= 161,330 SFTotal Proposed Impervious 6) Proposed Site Landscape Area 6) Proposed Building Site Coverage= 38.82 %Parking RequirementsOffice Area (Main Floor)8,000 SF at 2.0:1,000 SF (min)= 16Warehouse Area (Main Floor)153,320 SF at 1:1500 SF = 103Minimum Stalls Required = 119Stalls Provided = 145(31 Provided as compact, 21.3%)Bike Stalls Required (103 x 10%) = 11Trailer Stalls Provided= 24Primary Building EntranceAt-Grade Overhead DoorDock Door (48" Depth)Site Feature LegendRetaining WallScale: 1" = 40'P:\2017\17-045 DCT Monster Road\Drawings\17-045_A.dwg, 2/7/2018 1:33:31 PM, sphillips
Know what'sRDRAFTP:\2017\17-045 DCT Monster Road\Drawings\02_Civil\CAD\17-045_C3.0 Water-Sewer-Storm-Grading.dwg, 2/13/2018 5:32:22 PM, jhein
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Attachment B – Background Information
This attachment includes a King County Contours Map (B1); NRCS Soil Survey Map (B2); King
County Sensitive Areas Map (B3); USFWS NWI Map (B4); WDFW PHS Map (B5); Renton Wetland
and Stream Inventory Map (B6); DNR Stream Typing Map (B7); and WDFW SalmonScape (B8).
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Attachment B1 – King County Contours Map
Subject Property
Location
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Attachment B2 – NRCS Soil Survey Map
Subject Property
Location
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Attachment B3 – King County Sensitive Areas Map
Subject Property
Location
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Attachment B4 – USFWS NWI Map
Subject Property
Location
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Attachment B5 – WDFW PHS Map
Subject Property
Location
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Attachment B6 – Renton Wetland and Stream Inventory Map
Subject Property
Location
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Attachment B7 – DNR Stream Typing Map
Subject Property
Location
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Attachment B8 – WDFW SalmonScape Map
Subject Property
Location
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Attachment C – Technical Information Report (1994)
TECHNICALINFORMATIONREPORTforPLUMBERSANDPIPEFITTERSREGIONALSTORNWATERRETENTIONFACILITYlocatedatSWCORNEROFOAICESDALEAVE.SWANDMONSTERROADforPLUMBERSANDPIPEFITTERSTRUSTbyBUSH,ROED&HITCHINGS,INC.2009MINORAVENUEEASTSEATTLE,WASHINGTON98102ph:(206)323—4144fax:(206)323—7135contactHALHAGENSON,P.E.BRENo.90369.05June,1994
TABLEOFCONTENTSPageNo.I.ProjectOverviewII.PreliminaiyConditionsSummaryifi.Off-SiteAnalysisE..goc’(OATh’)IV.Retention/DetentionAnalysisandDesignV.ConveyanceSystemsAnalysisandDesign(PJt.ic’‘cTEMo-VI.SpecialReportsandStudiesVII.BasinandCommunityPlanningAreasVifi.OtherPermitsIX.Erosion/SedimentationControlDesignX.BondQuantitiesWorkSheet.Retention/DetentionFacility,SummarySheetandSketch,andDeclarationofCovenantXI.MaintenanceandOperationsManualXII.Appendix
I.PROJECTOVERVIEW
Peg.1of2KingCountyBuildingandLandDevelopmentDivisionTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPART1PROJECTOWNERANDPROJECTENGINEERProjectOwnerAddress1cQtJojQPhoneC)ici0OProjectEngineerLLl-Q.iO’-’P.E.Company(QLULLAddressPhone1-DOMovi1iQio..qeLo-Lt1o.N1v!,4144PART3TYPEOFPERMITAPPLICATIONSubdivisionShortSubdivisiont:GradingLCommerUaikric*o.?TOtherPART2PROJECTLOCATIONANDDESCRIPTIONProjectNamGniLocation4A.s-k-o-Township2-JRange4.Section14ProjectSize44AC_______UpstreamDrainageBasinSizeJ/PAC___PART4OTHERPERMITSDOF/GHPACOE404DOEDamSafetyFEMAFloodplainCOEWetlandsShorelineManagementRudcerySfriiturVauttsJOthertEIHPAPART5SITECOMMUNITYANDDRAINAGEBASINCommunity..-,_t_-DrainageBasin7y•Q_Q_4VQ.wPART6SITECHARACTERISTICSRiver1’-L&L(bXLQA.StreamCriticalStreamReachDepressions/SwalesLakeSteepSlopesOtherLakeside/ErosionHazardfl—nWetlands____________Seeps!SpringsHighGroundwaterTableGroundwaterRechargePART7SOILSSoilTypeSlopesErosionPotentialErosiveVelocitiesLJOVlLL0-c%___________________________________________________e/,Môco’1-LL.)2.Z3_________a/c,0.IcS[I]AdditionalSheetsAttatched
Pag.2o(2KInDCountyBuildinaandLandDevelopmentDivisionTECHNICALINFORMATIONREPORT(FIR)WORKSHEETPART10SURFACEWATERSYSTEMGrasslinedChannelTank[ElInfiltrationMethodofAnalysisPipeSystemlElVaulttElDepression‘“Je-t[EOpenChannelEnergyDissapator[]FlowDispersalCompensationiMitigation[ElDryPondWetland(ElWaiverofEliminatedSiteStorage[E]WetPond[EStreamRegionalDetentionBriefDescriptionofSystemOperationRpO-’i.iti?pv--oP-FecilityRelatedSiteLimitationsMditlonalSheetsMatchedReferenceFacilityUrritatlon‘a.-ELoo(C%*DiRppa-4e.c%A\jR+tecc4’%dm_ioooDrainageEasement[]AaessEasementNativeGrowthProtectionEasement[:]Trect[ElOtherPART14SIGNATUREOFPROFESSIONALENGINEERIoraUvil.ngln.arundermysupervisionhavevisitedth.she.ActualSheconditionsasobserv.dwereIncorporatedintothisworksheetandtheattatchments.TothebestofmyknowledgetheInformationprovidedhereisaccurate.ART8DEVELOPMENTLIMITATIONSREFERENCEUMIrAJIONfSITECONSTRAINTCh.4-DownstreamAnalysis‘‘wRvg.T€.‘44LLj2.c7Z)c?Jc%\w±occMdWonalSheetsAttatchedPART9ESCREQUIREMENTSMINIMUMESCREQUIREMENTSMINIMUMESCREQUIREMENTSDURINGCONSTRUCTIONFOLLOWINGCONSTRUCTIONLDSedimentationFacilitiesStabilizeExposedSurfaceStabilizedConstructionEntranceRemoveandRestoreTemporaryESCFacilitiesPerimeterRunoffControlCleanandRemoveMISiltandDebris[I]ClearingandGradingRestrictionsEnsureOperationofPermanentFacitrtiesCoverPractices-fllimitsofNGPESConstructionSequenceOther[EJOtherPART11STRUCTURALANALYSIS(Mayrequirespecialstructuralreview)CastinPlaceVaultOther[ERetainingWallRockery>4’Hegh[EStructuralonSteepSlopePART12EASEMENTS/TRACTSI1o
VICINITYMAPII’1OOc9’
0a):21k//44%44\Ic///0o.C•4r).FII3-’—0——N04:cfIII-..I’iI,froHELC/)N\P\\\
II.PRELIMINARYCONDITIONSSUMMARY
EXISTINGSITEHYDROLOGYTHEEXISTINGSITEISA43.7ACREDRAINAGEBASINATTHESOUTHWESTCORNEROFOAKESDALEAVENUES.W.ANDMONSTERROADTHATDRAINSTOANEXISTINGPONDBEHINDTHEELANDDISTRIBUTIONFACILITY.THISPONDSERVESASAREGIONALDETENTIONFACILITYFORTHEBLUNEPARCELSEGRETATION.CURRENTLY,PARCELS1AND2AREDEVELOPEDWITHLARGEDISTRIBUTIONANDMANUFACTURINGBUILDINGSANDPARCELS3,4AAND43AREUNDEVELOPEDWITHTREES,BRUSHANDWETLANDAREAS.THEEXISTINGIMPERVIOUSAREAIS15.9ACRES.SOILSONTHESITEAREAMIXTUREOFWOODINVILLE,PUGET,PUYALLUPANDBEAUSITE.SINCETHEMAJORITYOFTHESOILISWOODINVILLEOFTHEHYDROLOGICGROUP“D”ANDHASAMIXEDUSEOFMEADOWANDFOREST,ACOMPOSITECURVENUMBEROF85ISUSEDINTHEDRAINAGEANALYSISCALCULATIONS.THETIMEOFCONCENTRATIONTHROUGHTHESITEFROMTHEHILLSOUTHOFPARCEL3THROUGHTHECONTAINERCORPORATIONDRAINAGESYSTEMANDTOTHEPONDIS33.66MINUTES(SEEEXISTINGDRAINAGEBASINMAP).F.E.M.A.MAP328SHOWSTHESITEINFLOODZONEAHWITHA100YEARFLOODELEVATIONOF19FORTHEGREENRIVER.
bc2jNMV:IO131VOtP0Ippk.EcNOIONIHSVM37liV3SSiOA3AJflSaNvlS)i33NION3hAlODNI‘SONIHOIPHaou‘HSfl8.M.r7-3voa,r’Q•dLc,t4cL.4f’1C.d107iaM4dI4Ctb4%I‘13’1tà4Icirus,t)N,,VgYt1V2Jcj3..,j••c;j\\\-‘x\‘/1-----—--\x.‘\‘‘I),’—-j’1j—‘:—r.:.“-1•.,\\\_‘\.iji)I•.‘\\-.ino“.-);A/A/...,.....9IX\.dY/..7//I.N\\.\\‘i“---7,-7\—\\‘\\<.••M..•-—--c;_I,7)fI‘;—“\u\-j\\I‘Zi)i:l)IIJ\%oi-‘k-Jit!%I’\\ft\\\-:1zSi:3\‘.*(-EiAt—i/‘j’Ij..-4b4/\%YIo’‘\:•I\\\jU/f’IFy:.:c1)4‘:iz2•\‘..IIII/IJI:tcc:_L—--(IJI:•••“S\.‘....‘i;•..%v/-...•...\Lr3j4‘.--.::N%-._%-
DEVELOPEDSITEHYDROLOGYTHEDEVELOPEDSITEWILLCONSISTOF44ACRESOFCOMMERCIALDEVELOPMENTWITHAPPROXIMATELY25.5ACRESOFIMPERVIOUSSURFACEAREA(SEEDEVELOPEDDRAINAGEBASINMAP).ADEVELOPEDCMVALUEOF81WILLBEUSEDFORTHEUNDISTURBEDFORESTAREASAND98FORTHENEWIMPERVIOUSAREAS.THEFUTURETIMEOFCONCENTRATIONFROMPARCEL3TOTHEPONDISESTIMATEDTOBE33.12MINUTES.THEEXISTINGPONDWILLBERETROFITTEDWITHAPUMPEDDISCHARGESYSTEMTOCONTROLTHEPONDWATERLEVEL.THEPEAKDISCHARGERATEWILLBEEQUALTO50%OFTHEEXISTING2YEAR/24HOURSTORM.THEPUMPCONTROLSYSTEMWILLBESETTOMAINTAINAPONDLEVELATELEVATION11.THEOUTFALLWILLBETOTHEP—iCHANNELJUSTUPSTREAMFROMITSCONFLUENCEWITHTHEGREENRIVER.AMONITORINGSYSTEMWILLBEINSTALLEDATTHERIVERTOAUTOMATICALLYSHUTTHEPUMPSYSTEMOFFWHENTHERIVERISRUNNINGATTHE12,000CFSLEVELPERREQUIREMENTSOFTHEGREENRIVERFLOODCONTROLZONEDISTRICT.A200FOOTLONGBIOFILTRATIONSWALEWILLBECONSTRUCTEDTOHELPTREATTHESTORNWATERRUNOFFPRIORTOENTERINGTHEP-iCHANNEL.
1?c2bi:qpI11‘-‘-IaflxONBOCINMViOI31’VOII•31V3SI-PLV-CENO1ONHSVM‘37ilV3SSJOA3AJflSGNV7SJ3NIDN3lIMO3N1‘SONIHOIIH‘R030U‘HSflg;•-,.r4o.P•M•c,•f%VVOIV’Q•d2119c(Q’P)J77..,“1Gckr4’113t%I%3(c1€1Q13t3d)vr’v2’,c3311ii2.L:;-\ç:_\X\\.‘I.ft_\i.•a3i‘:‘:\\I‘\\\_7:-\I(7fj/L.I1/\N:.v_•_•‘&kA(_£L)C..:•‘••‘•),)fl.•II.4\\,qi,..\..)!!HiL(•ç,...1i\8x‘x’_.jItsI\’\.!•\rc:\\\NticIir;>?WI‘\\/‘b”:\J’\1’I.:i.C‘.%,L:2”“jr\\.‘I:.‘•.-..-....‘.S‘,,‘tajI?f:”:..4_O\‘6ia•“:.1’7..Lti1h1X\,.rA:1r_____:3—\\--K-_____________-I-E4,I—S.I-1,1If.-—---J12.,y/----‘Li-.-
iii.OFF-SITEANALYSIS
ZONEAE0C7,/ZONEAO*DEPi2ZONEXNV7ZO\_V\\Pt),t(I1?tYt?STRC1-/0RENIONI.\zCCITYOfTUKWILA530091-;33Or,\F-‘RMAhA.f
I•i__,‘
BASE FLOODFLOODINGSOURCEFLOODWAYWATERSURFACEELEVAJ1ON
SECtION MEAN REGULATORY WITHOUT I WITH INCREASE
CROSS SECTION DISTANCE1 WIDTH AREA VELOCITY FC000WAY fC000WAY
(FEEl)(SQUARE (FEET PER
FEET)SECOND)(FEET NGVD)
Green River
(Without Levees)
A 3.90 650 9,977 1.2 8.2 8.2 8.2 0.0
B 4.38 443 8,939 1.3 8.3 8.3 8.3 0.0
C 4.80 500 9,35?1.3 8.3 8.3 8.3 0.0
D 5.21 800 13,904 0.9 8.3 8.3 8.3 0.0
E 5.42 400 6,953 2.4 8.3 8.3 8.3 0.0
F 5.68 260 3,626 3.3 8.5 8.5 8.5 0.0
c 5.98 290 4,571 2.6 8.7 8.7 8.7 0.0
H 6.20 400 4,679 2.6 8.8 8.8 8.8 0.0
I 6.25 200 2,726 4.6 8.8 8.8 8.8 0.0
J 7.62 213 2,432 5.3 9.9 9.9 9.9 0.0
K 8.12 250 2,668 4.8 11.4 11.4 11.4 0.0
L 8.4?290 3,555 3.6 12.3 12.3 12.3 0.0
M 8.86 190 2,464 5.2 13.0 13.0 13.0 0.0
N 8.9?186 2,363 5.4 13.3 13.3 13.3 0.0
0 9.06 165 2,051 6.2 13.5 13.5 13.5 0.0
P 9.24 168 2,883 4.4 14.2 14.2 16.2 0.0
Q 9.48 134 2,665 4.8 14.4 14.4 14.5 0.1
R 10.63 176 2,654 4.8 17.5 17.5 17.6 0.1
S 10.79 163 3,247 3.9 18.1 18.1 18.2 0.1
1 10.87 163 2,735 4.?18.3 18.3 18.4 0.1
U 10.92 216 3,576 3.6 18.6 18.6 18.8 0.2
V 11.18 150 2,571 4.7 19.4 19.4 19.5 0.1
w 11.48 160 2,576 4.7 20.0 20.0 20.2 0.2
x 11.68 180 2,684 4.2 20.3 20.3 20.6 0.3
Y 11.83 175 2,568 4.?20.6 20.6 21.0 0.4
—I
THiles Above Mouth
FEDERAL EMERGENCY MANAGEMENT AGENCY FLOODWAY DATA
KING COUNTY,WA
4 AND INCORPORATED AREAS GREEN RIVER (WITHOUT LEVEES)
—p -—--—a---—-——--
‘pLI‘S70IIIIUr—ii’cI.U)—I—-HJ2-‘I4FQ_]l(jILul—c-jr-U)‘w‘—“r-IIJI,ti’sc-II1S.j’;70—“-)—S3tt’Sdl‘p•t’t,:i—c1F2ilHLi’s2ic-4‘I’c-làIIL_.j\)r•‘“+10J5’4‘SII—.ftFl12Qr4a?tieclci’.U2WWU)u\rw‘pI‘i’sIDj4]47ci1-u)‘p‘p‘pUU)7U)
—(s33A31IflOHIIM)AWN]3N9sv.IvO3IVHOdNOONIONVVM‘AINflOONINS311J0HJ0007JAONDV1N3V3DVNVVIAON3DH3VI]—000C.,’IIT1H1W.LI-rII0IF0‘-0L.44iLIiI-I-fl-JII-4t———1III-IH’IIWillii1i1—ti1tiIfr’AAIJCIÜ.w..IL.Z.4IriL:z..J.-o.•Q.Oi:.I‘•‘.4IItITtL-•I,441,I.___•,I4••44644.4it•46’•I••1•Ii-iifIt-—4II•I•II•!II—t‘Jt______4—00000000zjjOO0Li.Ii..i10U-U.32<<wI_ww<<2“<>->-wW.•>->-LU0••0_i000I•UiLfl‘(12C.)--0zwC,LUII:J.V4SH!1NL-4c1If-f1.t-j:.L•1%çLinoS3flN3A-------------••!eH!.!’;-;VHH,•$lt61—II,,r’ti1•—IIjI4—IJ——I---4!tI-i-Ijj_I--1--(lrtII--:tLL1--FLII4.——‘‘-I‘-6L-I•.&iJ..‘_z-:i4.•.NNNNN•II_•_f-E-Ji11TH--.II[‘!l’hilIIj4ItI4IIII—,It—446—4:•-f4-4:41I’lI.’’I-1•44I-i___‘--4--+---4--4---I6[0-6—446-:I•iI•I•II-----1I--jI1I-I•4•‘II—-i•3-1----0uJø_I,--.1..0.“I•w•I-0.•--z-1•I::I,•1II•6•‘4i•II-IIIIIIII-••jt._f44..4I•‘aVOH)VdN31LfliII‘TIirn_r•.rI4,IItI—1—•4tI-I-II.‘it‘IIII“II1’I-4-,1I•I-Ij-I-I4—i-.1-II1III.:l:..f4--4I1tIC;.it1I•-,I-i•—I464,I—:‘‘—I1-I-II-‘•-1•1-.tI..I—•4tII•4.II•—4I•III—.I4•.4‘.II.ijl4--I-:•:•I144-:••II44•I1i•••I:4•H3AIH03N3fl7INO:—.—L•,:__•.I.••—•44-••——•—•..-———.••••II•••—4‘—.•••—I—••—•I‘••I,Ii——•III4—!I——II•iiI-::::;-I11WL1IIIi‘IIIIIII•It1_I-III•‘--•i--—•—••—•I_••i,—I•••1-’-•‘‘‘.Ii••I•,,——•—II‘•I4•I•—•.••IIII).1;.-:•,-I•••II1-•’—-•III•I•I—•-I4-I-I—:4-L_.,_I-I•III-—IL__I--lutI—IIIII,I;‘I.•-—.--3—__-•-I-.._——_z:1IiiiI’4-‘i_I•-I•::I1•I•4•II•-‘ItL4tI4.—•IIIW:•••III•,I•II•IiI-I-I—IIIxD0LL>00U-.3zU024I-004UI-0-.I-I-•III‘II—II*-III.-.j_I1-I4i•I:I•fII•—III•III414I•I4•1•‘-4•--4tI•II[ILIr-i‘—,4••I•I••I—•I•IIII’.‘•——II.II•III•I•I‘II•.4II•I-.I••.II,—II-•—‘II—4..••I•.•III.••44III.I’-IIIII••f—II-I•-I4III.IL4———4—I••ItIIII—III—II•I4It•IIIIIII441I•Ij•,I•IIIII•I—I—:,LIIII•II‘•——•‘IIII-h-tf--ttH4±I•I$II•1I•1.1141IIIII;-tIIJ‘1•-IIII•I—•—I-—IIII••II——I—__=-_._f_._L____-I-IIIILtrt.IIItIiI-1—I_•I•—4’6I4-I-•II•I,__.4i••—I•I•---•61-II4I.1II_•I-C.,’0--I-I_i——43I-----Ii4It--•6•—-—-I-I---I-—•I--t4•I•-•--•6••IVII1•I-•-—I.I.--i-I-II—39I’I4;I-‘;I-••III-•—4-——1.--I4-1—-•I-I----I-II-_j_II--I••I_:IiI!•II-4-I••I,-ItI-I•IIII,I-—f-’-—--I.I—4ii-4--•I——I—I—‘•-I-.—f1••Ii—-—I--.t-!j:-iIII-fI__;IIIII4-:,I-..III•.4•—IIII_;::I::‘iIII••IIIII•4I.4II‘.-IIII:I:-II4II16I-I-+-I•I4IIIII•4——iIItI—I.—II‘III1I•IIIIII,I;CDj_1ICe0I•:•,4‘4-—11II-II4-•:I1.IIItI.1,IIIClI4—II-IIIIII—IIIII•ItIIIII4II.iIIII_i•64IiIIII1III•I—I•tIIt•••IIII,I-1•1.1.4..44ttIIh1I-III_-•I•II.I1Itf.II1—ilI.•----I.11•II4II•II-.—•.___t_•_,I,.I00-NtaAoN133:1)NOILVA373I1-I0-1a-r—4--I4-jI—tI—I0I-—4
STREAMDISTANCEINTHOUSANDSOFFEETABOVEMOUTH::-;:I__A!EER-::t1•::-,,V—-=-rV.ZL--4---—-.wIL—V•V•--VV__.--.-V--.V•V.——---___-4-VV•-—.-..LLL—Ow-.---,DU--<<I-0zPCaa25V—-.-V——-____[-—-—fh——-V••V:•I.,VIVfi-•ft-I;HVZ;-__2-._____IV——--.V-VIVIIIIVIVVIIVIIIIV•;.VIII20IIIIIVI]ffj:Ji_LiV_*I-H--1-.-—-f---——-—V•____IIi_I_[_TIIL-Ht-bH-T-;:IIIVir____j_p-—’4VI!I--H-I-——t----r—--1-“——ht—---IIV>15__7____1t-IIIIVIIV----IPRO--ANDV.I•tLVVFlOiIII__-ff-1—L___4-_4_i_OsASREGULibWAHAHA--1---.-.-,VI•IiEWTZZQUENY-VTEDBY‘-•-E-oAM:_LI-LULUU.z0I->LUU.IiL:VII:.II—.—,-I—,—.—-4VH—IIIIIII10I_I•V•--H--—--VVVIIVZVVZI•VfVIIIVj251.TffIHT4—-h-ff-H-1II•_-—-H——”V--IIIIIIIIIIVVIVI-H+--_lVVVVIVHI---—-:V_V_I__IIII:I-—-;-II_VII—IIII--HV,Hi—4----_-1-IIIIIV+-—I-i_.HI--——+-IIVII5IIIII-I:IIILiJLaLU=C-)==-I.-:-—‘————,IIVIIII-rIII20VVII.V•II—JII-----H-—LIVIIVI+_i___t_ViIJIV-“--——_.Vjr__VVIIVIIVIII0I1I=1-I---..--I--------—V___V-i-—---——“-IIVI75II—-—----,---,-—IVVV-ti-I—.---——-.LfEEVV-—I--—•—--U-i-5!I—---H--70J_VV••1iI•V———-I—H—--VVIIIV--VI--V.10I‘—IV0IjVVII---——+V•I,V—,—-I—V—--————--—0.5I:—I-I7.0tVfEIiIILEGEND1.5II.I02.0VII500-YEARFLOODV2.5IIiII700-YEARFLOOD-V3.0C,,—I-C-)cz:>.C.)zwI-zLULU0z>.CizLU0wLU-jLULUU.50-YEARFLOODII3.570-YEARFLOOD4.0STREAMBEDa4.5CROSSSECTIONLOCATION5,05.56.0
A).OFF-SITEDRAINAGETOTHESITEB).0FF-SITEDOWNSTREAMANALYSISRefertothemaponthefollowingpagefordetailsoftherouting.
IV.RETENTION/DETENTIONANALYSISANDDESIGNA.EXISTINGPOND(SEEAPPENDIX“A”)PAGEXXB.DEVELOPEDPOND(SEEAPPENDIX“3”)PAGEXXC.EXISTINGFLOWSTOPONDPAGEXXD.DEVELOPEDFLOWSTOPONDPAGEXXE.PONDWATERLEVELSPAGEXX
EXISTINGPONDTHEEXISTINGPONDISAPPROXIMATELY1.9ACRESANDISLOCATEDONBOTHSIDESOFTHERAILROADSPURLINEINPARCELS2,4-AAND4-B(SEEAPPENDIX“A”).THEWATERLEVELVARIESDURINGTHEYEARDEPENDINGONTHEAMOUNTOFRAINFALL.INFILRATIONTESTSANDGROUNDWATERMONITORINGWELLSINDICATETHEREISVERYLITTLEOUTFLOWFROMTHEPONDANDPOSSIBLYINFLOWDURINGWETTIMESOFTHEYEAR(SEEFOLLOWINGEARTHCONSULTANTSINC.DATA).THEREISANEXISTING30INCHCM?LOCATEDINTHENORTHWESTCORNEROFPARCEL2ANDEXTENDINGTOTHERIVERWITHAFLAPGATEATTHEOUTFALL.THEINLETENDOFTHEPIPEISBURIEDANDTHEPIPEISNOTOPERATIONAL.
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3(1—17—199115:18FROMUCEBLLEF’4DCO.ToBIGIROEDP.04MonftorlngWellDetail1—UEI(T0#TESEAL-BANDIW4PlANKSLOflEPCNEE$-BLANKSILTThAPBOTTOMWELLCAPMonitoringWellinformationWallNo.SlottedPipeGroundwal.iLevelR.adit;(ft.)(depthring.1ft)Depth(IL)6120/91t2)—=--—.—MW-i8.0to15020.077.070.0MW-25.0to72.012.07.0.6.0MW-310.0to15.015.013.011.0MW42.0to10.010.03.52.5MW-S5.0to10.010.08.03.0NoR:Gmvndwal.rl,v.1gaba,vwerevetotheec.tngØaoentmonilorffigweflwrtaoeWed....O-i9.MONITORINGWElLDETAILEarthConsUltantsinC.DXSTRIBUTIONFACILITY..-1-_-•--RENTON,WASHINGTON(Proj.No.4563_4]Dtwn.WJ;Date3wi191CheckedVODate6-27-91Plate2—BLANK0*19104roTa.P.04
f:infiltst45£7891011121415161.705I.’‘—.1.815U.0260.961.080.0710.00790.070.5840.01280.00520.2890.3530.3530.0260.961.080.0710.070.070.5840.5840.01280.2890.2892.4221less2less30.0690.t:690•0690.0260.960.0717.04793.51480.5034210.351480.30275
DEVELOPEDPONDTHEDEVELOPEDPONDWILLBEAPPROXIMATELYTHESANESIZEASTHEPRE-DEVELOPEDPONDFROMELEVATON8.5TOELEVATION10(SEEFOLLOWINGFULLDEVELOPEDCONDITIONSCHART).SINCEDEVELOPMENTOFPARCEL2THEWATERSURFACEHASREACHEDTHEELANDBUILDINGFIRELANDDURINGEXTENDEDRAINSTORMSANDHASNEEDEDTOBEPUMPEDONOCCASION.
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EXISTINGFLOWSTOPOND(PARCELS1&2DEVELOPED,PARCELS3,4-A&4BUNDEVELOPED)THEPEAKHYDROGRAPHFLOWFORTHE2YEAR/24HOURSTORMIS7.7960cfs.THEALLOWABLERELEASERATEFROMTHISSITEIS50%OFTHISPEAKRATEOR3.8980cfs.ARAINFALLPRECIPITATIONOF1.30INCHESWASDETERMINEDBYTRIALANDERRORTOEQUALTHISALLOWABLERELEASERATE.THEPUMPWILLBESIZEDFOR3.8980cfsOR1,750gpm(3.898cfsx7.480519gallonsx60minutes).JSTORMRAINPRECIP.JPEAKFLOWPEAKVOL.50%2/242/2410/24100/24100/7day1.30in.1.95in.2.85in.3.95in.9.80in.3.9061cfs7.7960cfs13.9285cfs21.9922cfs13.9057cfs2.2020ac/ft4.0430ac/ft6.8595ac/ft10.5132ac/ft27.8279ac/ft
KINGCOUNTY,WASHINGTON.SURFACEWATERDESIGNMANUALFIGURE3.5.1C2-YEAR24-HOURISOPLUVIALScd’t.qc2-YEAR24-HOURPRECIPITATION3.4ISOPLUVIALSOF2-YEAR24-HOURTOTALPRECIPITATIONININCHESo1234567•MIi1:300,0003.5.1-81o
KINGCOUNTY.WASHINGTON,SURFACEWATERDESIGNMANUAL-a.ec10-YEAR24-HOURPRECIPITATION3.4ISOPLUVIALSOF10-YEAR24-HOURTOTALPRECIPITATIONININCHES02234567IMfliFIGURE3.5.1E10-YEAR24-HOURISOPLUVIALS2.22.3.03y30I;300.0003.5.1-101O
KINGCOUNTY.WASHINGTON.SURFACEWATERDESIGNMANUALURE3.5.1H100-YEAR24-HOURISOPLUVIALS1tcDtEAR24-HOURPRECIPITATION3.ISOPLUVIALSOF100-YEAR24-HOURTOTALPRECIPITATIONININCHESO1234567BMII.i—--3.5.1-131300.0001o
KIXGCOUNTY.WASHINGTON,SURFACEWATERDESIGNMANUALFIGURE3.5.11100-YEAR7-DAYISOPLUVIALS100-YEAR7-DAYPRECIPITATION3.4—.-—ISOPLUVIALSOF100-YEAR7-DAYTOTALPRECIPITATIONININCHES01234567BUII.*3.5.1-14II1:3OOOQOI0
Ii9_af‘BeCf7•/,c?\ll•______‘LJ(BeD//:/4yec$2‘°p•..••.1.‘.ta_JSSt%1PZJSt*__BeCGolfourseIwoçcç]L.)\UtIBMV7‘—(\sew\ge\NgUtUt•I5JS••—•_••SUtM16[—m.—IUtPu••WiLongacre;1•—,.:•1I(/•,r—u•Rc_PyUtt_ljILUrIWoa.iIS—I——No;Track7‘V-—---—-1“Is———•—c’u129.-....._—It9UttilUt-INILPiR$rvoir•T—:.•=—.—•SoTu•4/7)Pu\4IoLWot2L.aa.-.:);L4=Lo[ô]S--LQ)(I)LiICI027’30”AL\Pu/‘r51i\lx\1i>“VIUQ“itrSkUSkUt/
KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUAL(2)CNvaluescanbeareaweightedwhentheyapplytoperviousareasofsimilarCN’s(within20CNpoints).However,highCNareasshouldnotbecombinedwithlowCNareas(unlessthelowCNareasatelessthan15%ofthesubbasin).Inthiscase,separatehydrographsshouldbegeneratedandsummedtoformonehydrograph.FIGURE3.5.2AHYDROLOGICSOILGROUPOFTHESOILSINKINGCOUNTYHYDROLOGICHYDROLOGICSOILGROUPGROUP*SOILGROUPGROUP*AlderwoodCOrcasPeatDArents,AlderwoodMaterialCOridia0Arents,EverettMaterialBOvallCBeausiteCPilchuckCBellinghamDPugetDBriscot0Puyafiup8BuckleyDRagnarBCoastalBeachesVariableRentonDEadmontSiltLoamDRiverwashVariableEdgewickCSalalCEverettA/BSammamishDIndianolaASeattleDKitsapCShacarDKlausCSiSiltCMixedAlluvialLandVariableSnohomishDNeillonASultanCNewbergBTukwilaDNooksackCUrbanVariableNormalSandyLoamDWoodinvilleDHYDROLOGICSOILGROUPCLASSIFICATIONSA.(Lowrunoffpotential).Soilshavinghighinflltrationrates,evenwhenthoroughlywetted,andconsistingchieflyofdeep,well-to-excessivelydrainedsandsorgravels.Thesesoilshaveahighrateofwatertransmission.B.(Moderatelylowrunoffpotential).Soilshavingmoderateinfiltrationrateswhenthoroughlywetted,andconsistingchieflyofmoderatelyfinetomoderatelycoarsetextures.Thesesoilshaveamoderaterateofwatertransmission.C.(Moderatelyhighrunoffpotential).Soilshavingslowinfiltrationrateswhenthoroughlywetted,andconsistingchieflyofsoilswithalayerthatimpedesdownwardmovementofwater,orsoilswithmoderatelyfinetofinetextures.Thesesoilshaveaslowrateofwatertransmission.D.(Highrunoffpotential).Soilshavingveryslowinfiltrationrateswhenthoroughlywettedandconsistingchieflyofclaysoilswithahighswellingpotential,soilswithapermanenthighwatertable,soilswithahardpanorclaylayeratornearthesurface,andshallowsoilsovernearlyimperviousmaterial.Thesesoilshaveaveryslowrateofwatertransmission.*FromSC$,TR-55,SecondEdition,June1986,ExhibitA-i.RevisionsmadefromSC$,SoilInterpretationRecord,Form5,September1988.3.5.2-211/92
KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTABLE5.2BSCSWESTERNWASHINGTONRUNOFFCURVENUMBERSSOSWESTERNWASHINGTONRUNOFFCURVENUMBERS(PublishedbySCSin1982)Runoffcurvenumbersforselectedagricultural,suburbanandurbanlanduseforType1Arainfalldistribution,24-hourstormduration.CURVENUMBERSBYHYDROLOGICSOILGROUPLANDUSEDESCRIPTIONABCDCultivatedland(1):wintercondition56919495—Mountainopenareas:lowgrowingbrushandgrasslands74828992—Meadoworpasture:65788589Woodorforestland:undisturbedoroldersecondgrowth42647681—Woodorforestland:youngsecondgrowthorbrush55728186Orchard:withcovercrop81889294Openspaces,lawns,parks,golfcourses,cemeteries,—landscaping.goodcondition:grasscoveron75%ormoteofthearea68808690faircondition:grasscoveron50%to75%ofthearea77859092Gravelroadsandparkinglots76858991—Dirttoadsandparkinglots72828789Impervioussurfaces,pavement,roofs,etc.98989898—Openwaterbodies:lakes,wetlands,ponds,etc.100100100100SingleFamilyResidential(2)DwellingUnit/GrossAcre%Impervious(3)1.0DU/GA15Separatecurvenumber1.5DU/GA20shallbeselected2.0DU/GA25forpeMousand2.5DU/GA30imperviousportion3.0DU/GA34ofthesiteorbasin3.5DU/GA384.0DU/GA424.5DU/GA465.0DU/GA485.5DU/GA506.0DU/GA526.5DU/GA547.0DU/GA56Plannedunitdevelopments,%imperviouscondominiums,apartments,mustbecomputedcommercialbusinessandindustrialareas.(1)ForamoredetaileddescriptionofagriculturallandusecurvenumbersrefertoNationalEngineeringHandbook,Section4,Hydrology,Chapter9,August1972.(2)Assumesroofanddrivewayrunoffisdirectedintostreet/stormsystem.(3)Theremainingperviousareas(lawn)areconsideredtobeingoodconditionforthesecurvenumbers.3.5.2-311/92
3DESCRIPTION3AREAfacte5)3RAINPRECIP(in)3TIMEINTERVALCr,in):3TIMEOFCONC(rrdn):3RAINFFiLLSELECTION:3ABSTRACTCOEFF3BASEFLOW(cf5)3STORMOURfhrs)33PERVIOUSPARCEL3AREA:27.800acres3CN:86.001.9610.0033.6660.200.00024.000IMPERVIOUSPARCELAREA:15.900acre5CN:98.00RAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPES.TYPE6.USER7.KC78.CUSTOM3SUMMARYDATA33PEARHYDROGRAPHTIME:8.00hrs33PEAKHYDHOGRAPHFLOW:7.7960cfsç’%C”f3.’IS.‘33TOTALHYDROGRAPHVOL:4.0430ac—ft33HOMEENDF1:FindF2:NewF3:GetF4:Tc—CalcF5:Delete33PgupPgdnF6:ComputeF?:F8:MethodF9:TemplateF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>3DESCRIPTION3AREA(acres)3RAINPRECIP(in)3TIMEINTERVAL(min):3TIMEOFCONC(mm):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOW(Cf5)3STORMOUR(hrs)S.TYPE36.USER17.KC7DAY8.CUSTOM3PERVIOUSPARCELIMPERVIOUSPARCEL33AREA:27.800acresAREA:15.900acres33CN:85.00CN:98.003aSUMMARYDATA33PEAKHYDROSRAPHTIME:8.00hrs33PEARHYDROGRAPHFLOW:3.9061cfs33TOTALHYDROGRAPHVOL:2.2020ac—ft33HOMEENDF1:FindF2:NewF3:GetF4:Tc—CalcFS:Delete33PgupPgUnF6:ComputeF7:F8:MethodFS:TemplateF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>FileBasinHydrographStorageDi5chargeLevelpooi3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA3SBUHHYDROGRAPH3BASINIDX2/24EXISTING2YR,24HR43.700hA3DAY3333333FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA3BASINID1/2X2SBUHHYDROGRAPH360%EXISTING2YR,24HR343.700RAINFALLCHOICES3___o?EZ.’Q4i.TYPEIA310.002.TYPEI333.663.TYPEII364.TYPEhA30.00024.000
33DESCRIPTION3AREA(acre5)3RAINPRECIPtin)3TIMEINTERVAL(rin):3TIMEOFCONC(mm):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOW(cfs)3STORMDURthrs)33PERVIOUSPARCEL3AREA:27.800acres3CN:88.003DESCRIPTION3AREA(acre5)3RAINPRECIP(in)3TIMEINTERVALtmin):3TIMEOFCONC(mm):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOW(cfs)3STORMDUR(hr5)33PERVIOUSPARCEL3AREA:27.800acres3CN:86.00343.70028510.0033.66a0.200.00024.000IMPERVIOUSPARCELAREA:CN3.9610.0033.66S0.200.00024.000IMPERVIOUSPARCELAREA:15.900acresCN:98.00RAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPEIIA5.TYPE36.USERI7.KC7DAY8.CUSTOMRAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPEhA5.TYPE36.USER17.KC7DAY8.CUSTOM333333333333333]j33333FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMB3INPUT,MODIFYORBROWSEDATA3BASINIDX10EXISTING1OYR,24HRSBUHHYDROGRAPH16.900acres98.003SUMMARYDATA33PEAKHYDROGRAPHTIME:8.00hrs33PEAKHYDROGRAPHFLOW:13.9286cfs33TOTALHYDROGRAPHVOLt6.8895ac—ft33HOMEENDFl:FindF2:NewF3:GetF4:Tc—CalcF5:Delete33PgupPgdnF6:ComputeF?:F8:MethodF9:TemplateF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>FileBasinHydrographStorageDischargeLevelpooi3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA3BASINIDX100SBUHHYDROGRAPHEXISTING100YR,24HR43.70033SUMMARYDATA33PEAKHYDROGRAPHTIME:8.00hr533PEAKHYDROGRAPHFLOW:21.9922cf533TOTALHYDROGRAPHVOL:10.5132ac—ft33HOMEENDF1:FindF2:NewF3:GetF4:Tc—CalcF6:Delete33PgupPgdnF6:ComputeF7:F8:MethcdF9tTemplateF1@:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>
3DESCRIPTION3AREA(acres)3RAINPRECIPtin)3TIMEINTERVAL(in):3TIMEOFCONCtriin):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOWtcfs)23STORMOUR(hrs)33PERVIOUSPARCEL3AREA:27.800acres3CN:86.0060.0033.6670.200.000168.000IMPER’JIOUSPARCELAREA:CNRAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPEHAS.TYPE36.USER7.KC7DAY8.CUSTOM3333333333333FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMB3INPUT,MODIFYORBROWSEDATA33BASINIDX1007SBUHHYDROGRAPH3EXISTING100YR,7DAY43.7009.8016.900acres98.003SUMMARYDATA33PEAKHYDROGRAPHTIME:66.00hrs33PEAKHYDROGRAPHFLOW:13.9057cfs33TOTALHYOROGRAPHVOL:27.8279ac—ft33HOMEENDFl:FjndF2:NewF3:GetF4:Tc—CalcFS:Delete33PgupPgdnF6:ComputeF7:F8:MethodF9:TepleteF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>
DEVELOPEDFLOWSTOPOND(PARCELS1,2,3,4—A&4—B)STORMRAINPRECIP.IPEAKFLOWPEAKVOL.2/2410/24100/24100/7day1.95in.2.85in.3.95in.9.80in.9.1477cfs15.2693cfs23.2337cfs14.2898cfs4.5487ac/ft7.4141ac/ft11.1008ac/ft28.9792ac/ft
3DESCRIPTION3AREA(acre5)3RAINPRECIP(in)3TIMEINTERVAL(min):3TIMEOFCONC(riin):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOW(cfs)3STORMDURfhrs)33PERVIOUSPARCEL3AREA:18.500acres3CN:81.00SUMMARYDATATIME:FLOW:44.0001.9510.0033.1260.200.00024.000IMPERVIOUSPARCELAREA:26.500acresCN:98.00RAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPEIIAS.TYPE36.USER17.KC7DAY8.CUSTOM33FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA3BASINIDD10SBUHHYDROGRAPH3DESCRIPTION3AREA(acres)3RAINPRECIP(in)3TIMEINTERVAL(min):3TIMEOFCONC(riin):3RAINFALLSELECTION:3ABSTRACTCOEFF3BASEFLOW(cfs)3STORMDURthrs)33SUMMARYDATA33PEARHYDROGRAPHTIME:8.00hrs33PEARHYDROGRAPHFLOW:15.2693Cf533TOTALHYDROGRAPHVOL:7.4141ac—ft33HOMEENDF1:FindF2:NewF3:GetF4:Tc—CalcFS:Delete33PgupPgdnFB:ComputeF7:F8:MethodF9:TemplateF10:Exit3TMMIIMMMMMMMMMMMMMMMIIMMMMMMMMMIIMMMMMIIMMIIMMMMMMMMMMMMMMMMMMMMMMMMIIMMMMMMIIMMMMMM>FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA33BASINIDD2/24SBUHHYDROGRAPH3DEVELOPED2YR,24HR33333333338.00hrs39.1477cfs33PEAKHYDROGRAPH3PEAKHYDROGRAPH3TOTALHYDROGRAPHVOL:4.5487ac—ft33HOMEENDF1:FindF2:NewF3:GetF4:Tc—CalcF6:Delete33PgupPgdnFS:ConputeF7:F8:MethodF9:TenplateF10:Exit3TMMIIMMMMMMMMIIMMMIIMMMMMIIMMMMMMMMMMMMMMMIIMMMMIIMMIIMMMMMMMMMIIMMMMMMMMMMMMMMMMMMMM>333DEVELOPED10YR,24HR44.0002.8510.0033.12S(.,f.0.00024.000IMPERVIOUSPARCELAREA:26.S00acresCN:98.003PERVIOUSPARCEL3AREA:18.500acres3CN281.00RAINFALLCHOICES1.TYPEIA2.TYPEI3.TYPEII4.TYPEIIAS.TYPE36.USER17.KC7DAY8.CUSTOM3333333333j
FileBa5inHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMS3INPUT,MODIFYORBROWSEDATA33BASINIDD100SBUHHYDROGRAPH33OESCRIPTION:DEVELOPED100YR,24HR33AREA(acres):44.000RAINFALLCHOICES3RAINPRECIP(in)23.951.TYPEIA33TIMEINTERVALCin):10.002.TYPEI33TIMEOFCONC(mm):33.123.TYPEII33RAINFALLSELECTION:64.TYPEIIA3ABSTRACTCOEFF:0.206.TYPE333BASEFLOW(cfs)20.0008.USER13ZSTORMDUR(hr5):24.0007.KC7DAY38.CUSTOM3PERVIOUSPARCELIMPERVIOUSPARCEL3AREA:18.600acresAREA:25.500acres33CN:81.00CN:98.003333SUMMARYDATA33PEAKHYDROGRAPHTIME:8.00hrs33PEAKHYDROGRAPHFLOW:23.2337cfs33TOTALHYDROGRAPHVOL:11.1008ac—ft33HOMEENDFl:FindF2:NewF3:GetF4:Tc—CalcF6:Delete33PgupPgdnF6:ComputeF7:F8:MethodF9:TemplateF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>FileBasinHydrographStorageDischargeLevelpool3MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM83INPUT,MODIFYORBROWSEDATA33BASINIDD1007SBUHHYDROGRAPH33DESCRIPTION:DEVELOPED100YR,7DAY33AREA(acres):44.000RAINFALLCHOICES33RAINPRECIP(in):9.801.TYPEIA33TIMEINTERVAL(min):60.002.TYPEI33TIMEOFCONC(mm):33.123.TYPEII33RAINFALLSELECTION:74.TYPEIIA3ABSTRACTCOEFF:0.206.TYPE333BASEFLOW(cfs):0.0006.USER133STORMDUR(hrs)168.0007.1<07DAY338.CUSTOM33PERVIOUSPARCELIMPERVIOUSPARCEL33AREA:18.600acresAREA;25.600acres33CN:81.00CN:98.00333SUMMARYDATA33PEARHYDROGRAPHTIME:66.00hrs33PEARHYDROGRAPHFLOW:14.2898cfs33TOTALHYDROGRAPHVOL:28.9792ac—ft33HOMEENDFl:FindF2:NewF3:GetF4:Tc—CalcF6:Delete33PgupPgdnFE:ComputeF7:F8:MethodF9;TemplateF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>
PONDWATERLEVELSTHEFOLLOWINGWATERLEVELSREFLECTTHEFLOWSFROMAFULLYDEVELOPED44ACREDRAINAGEBASINFORTHE2,10,100&100YEAR,7DAYDESIGNSTORMS.THEDEVELOPEDPONDISASSUMEDTOHAVEASTATICWATERLEVELATELEVATION10.5FEETWITHNOINFILTRATION.THEPUMPISSETTOSTARTUPATELEVATION11.50ANDSHUTOFFATELEVATION11.00.IINFLOWPEAKJPEAKSTAGE2/2410/24100/24100/7day9.15cfs15.27cfs23.23cfs14.29cfs11.50’11.57’12.11’12.17’2.12cfs3.90cfs3.90cfs3.90cfsSTORMPEAKOUT
FileBa5inHydrographStorageDischargeLevelpoolBush,2MMMMMMMMMMMMMMMMMMMMMMS333Rectangularvault33Trapezoidalbasin33Undergroundpipe33Stolist33Customfile33MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMB3CUSTOMSTG—STOLIST33STORAGESTRUCTUREID:DPOND33NAME:DEVELOPEDWETLANDSPOND33INCREMENT:0.103333STAGEAREAsfSTAGEAREAsf331:10.000.006:14.00233876310.600.007:15.00248900333:11.001722768:16.00286400334:12.002039009:17.00328726335:13.0021166010:18.00374300333PGUPPGDNF2:AREAF3:GETFE:DeleteF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>AvailableMemoryremaining:137008bytesCurrentDataSetName:D:\WORKS\JAL\90369—04FileBasinHydrographStorageDischargeLevelpoolBush,RoedrH1t2MMMMMMMMMMMMMMMMMMMMMMBRelease333Proportionalweir3v—Weir33Notchweir33Broadcrestedweir33Orificedesign33MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMS3CUSTOMSTG—DISCURVE33DISCHARGESTRUCTUREID:PUMP33NAME:WETLANDSOVERFLOWPUMP33INCREMENT:0.01333STAGEDISCHARGESTAGEDISCHARGE331:10.000.006:14.003.90332:11.490.007:16.003.903—33:11.503.908:16.003.90334:12.003.909:17.003.903‘35:13.003.9010:18.003.903333PGUPPGDNF3:GetFE:DeleteF10:Exit3TMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM>AvailableMemoryremaining:137008bytesCurrentDataSetName:D:\WORKS\JAL\90369—04
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XI.MAINTENANCEANDOPERATIONSMANUAL
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 22 of 25
Attachment D – Wetland Rating Forms
Wetland name or number
Name of wetland (or ID #):Date of site visit:3/5/2018
Rated by Trained by Ecology? Yes No Date of training 3/31/2016
HGM Class used for rating Wetland has multiple HGM classes? Yes No
NOTE: Form is not complete with out the figures requested (figures can be combined ).
Source of base aerial photo/map
OVERALL WETLAND CATEGORY III (based on functions or special characteristics )
1. Category of wetland based on FUNCTIONS
Category I - Total score = 23 - 27 Score for each
Category II - Total score = 20 - 22 function based
X Category III - Total score = 16 - 19 on three
Category IV - Total score = 9 - 15 ratings
(order of ratings
is not
important )
M M 9 = H, H, H
H L 8 = H, H, M
M L Total 7 = H, H, L
7 = H, M, M
6 = H, M, L
6 = M, M, M
5 = H, L, L
5 = M, M, L
4 = M, L, L
3 = L, L, L
2. Category based on SPECIAL CHARACTERISTICS of wetland
X
Depressional & Flats
RATING SUMMARY – Western Washington
List appropriate rating (H, M, L)
HydrologicImproving
Water Quality
MSite Potential
Landscape Potential
Habitat
M
FUNCTION
Offsite Wetland A
J. Downs, J. Pickett, E.Swaim
ESRI 2017
Coastal Lagoon
Interdunal
Value
Score Based on
Ratings 7 7 4 18
H
CHARACTERISTIC Category
Estuarine
Wetland of High Conservation Value
Bog
Mature Forest
Old Growth Forest
None of the above
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 1 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 2 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Maps and Figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Location of outlet (can be added to map of hydroperiods )
Boundary of area within 150 ft of the wetland (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Riverine Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Ponded depressions
Boundary of area within 150 ft of the wetland (can be added to another figure )
Plant cover of trees, shrubs, and herbaceous plants
Width of unit vs. width of stream (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Lake Fringe Wetlands
Map of: Figure #
Cowardin plant classes
Plant cover of trees, shrubs, and herbaceous plants
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Slope Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Plant cover of dense trees, shrubs, and herbaceous plants
Plant cover of dense, rigid trees, shrubs, and herbaceous plants
(can be added to another figure )
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
S 4.1
S 2.1, S 5.1
To answer questions:
H 1.1, H 1.4
H 1.2
S 1.3
H 2.1, H 2.2, H 2.3
L 3.1, L 3.2
L 3.3
H 2.1, H 2.2, H 2.3
R 3.1
R 3.2, R 3.3
To answer questions:
L 1.1, L 4.1, H 1.1, H 1.4
H 1.2
R 1.1
R 2.4
R 1.2, R 4.2
R 4.1
R 2.2, R 2.3, R 5.2
H 2.1, H 2.2, H 2.3
L 1.2
L 2.2
D 1.1, D 4.1
D 2.2, D 5.2
D 4.3, D 5.3
H 2.1, H 2.2, H 2.3
D 3.1, D 3.2
D 3.3
To answer questions:
H 1.1, H 1.4
To answer questions:
D 1.3, H 1.1, H 1.4
D 1.4, H 1.2
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 3 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
S 3.1, S 3.2
S 3.3
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 4 WSDOT Adapted Form - March 2, 2015
Wetland name or number
For questions 1 -7, the criteria described must apply to the entire unit being rated.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO - go to 2 YES - the wetland class is Tidal Fringe - go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO - Saltwater Tidal Fringe (Estuarine)YES - Freshwater Tidal Fringe
NO - go to 3 YES - The wetland class is Flats
If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands.
3. Does the entire wetland unit meet all of the following criteria?
NO - go to 4 YES - The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
The wetland is on a slope (slope can be very gradual ),
The water leaves the wetland without being impounded.
NO - go to 5 YES - The wetland class is Slope
5. Does the entire wetland unit meet all of the following criteria?
The overbank flooding occurs at least once every 2 years.
NO - go to 6 YES - The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding.
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands.
If it is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be
used to score functions for estuarine wetlands.
The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
The water flows through the wetland in one direction (unidirectional) and usually comes from seeps.
It may flow subsurface, as sheetflow, or in a swale without distinct banks.
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow
depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep).
The unit is in a valley, or stream channel, where it gets inundated by overbank flooding
from that stream or river,
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it.
Groundwater and surface water runoff are NOT sources of water to the unit.
HGM Classification of Wetland in Western Washington
If hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit
with multiple HGM classes. In this case, identify which hydrologic criteria in questions 1 - 7 apply, and go to
Question 8.
At least 30% of the open water area is deeper than 6.6 ft (2 m).
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 5 WSDOT Adapted Form - March 2, 2015
Wetland name or number
NO - go to 7 YES - The wetland class is Depressional
NO - go to 8 YES - The wetland class is Depressional
NOTES and FIELD OBSERVATIONS:
Salt Water Tidal Fringe and any other
class of freshwater wetland
HGM class to
use in rating
Riverine
Depressional
Lake Fringe
If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than
2 HGM classes within a wetland boundary, classify the wetland as Depressional for the rating.
Riverine
Treat as
ESTUARINE
Slope + Lake Fringe
Depressional + Riverine along stream
within boundary of depression
Depressional + Lake Fringe
Riverine + Lake Fringe
NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of
the total area of the wetland unit being rated. If the area of the HGM class listed in column 2 is less than 10%
of the unit; classify the wetland using the class that represents more than 90% of the total area.
HGM classes within the wetland unit
being rated
Slope + Riverine
Slope + Depressional
Depressional
Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding?
The unit does not pond surface water more than a few inches. The unit seems to be maintained by high
groundwater in the area. The wetland may be ditched, but has no obvious natural outlet.
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM classes. For
example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a
Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE
HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT
(make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for
the rating system if you have several HGM classes present within the wetland unit being scored.
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at
some time during the year? This means that any outlet, if present, is higher than the interior of the wetland.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 6 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 7 WSDOT Adapted Form - March 2, 2015
Wetland name or number
D 1.1. Characteristics of surface water outflows from the wetland:
points = 3
points = 2
points = 1
points = 1
Yes = 4 No = 0
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > ½ of area points = 3
Wetland has persistent, ungrazed plants > 1/10 of area points = 1
Wetland has persistent, ungrazed plants < 1/10 of area points = 0
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4
Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 9
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 2.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
Yes = 1 No = 0
D 2.3. Are there septic systems within 250 ft of the wetland?Yes = 1 No = 0 0
Source Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
Yes = 1 No = 0
Yes = 1 No = 0
Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 3
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
1
0
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
2
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet.
Wetland is a depression or flat depression (QUESTION 7 on key)
with no surface water leaving it (no outlet).
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch.
4
D 2.0. Does the landscape have the potential to support the water quality function of the site?
DEPRESSIONAL AND FLATS WETLANDS
D 3.3. Has the site been identified in a watershed or local plan as important
for maintaining water quality (answer YES if there is a TMDL for the basin in
which the unit is found )?
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic
(use NRCS definitions ).
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or
Forested Cowardin classes):
D 2.4. Are there other sources of pollutants coming into the wetland that are
not listed in questions D 2.1 - D 2.3?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river,
lake, or marine water that is on the 303(d) list?
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that
generate pollutants?
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
D 3.0. Is the water quality improvement provided by the site valuable to society?
1
0
2
0
3
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 8 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 9 WSDOT Adapted Form - March 2, 2015
Wetland name or number
D 4.1. Characteristics of surface water outflows from the wetland:
points = 4
points = 2
points = 1
points = 0
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5
Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater” wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in)points = 0
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 7
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 5.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
D 5.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes = 1 No = 0
Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: 3 = H 1 or 2 = M 0 = L Record the rating on the first page
points = 2
points = 1
Flooding from groundwater is an issue in the sub-basin.points = 1
points = 0
DEPRESSIONAL AND FLATS WETLANDS
D 6.0. Are the hydrologic functions provided by the site valuable to society?
The wetland captures surface water that would otherwise flow down-gradient into areas
where flooding has damaged human or natural resources (e.g., houses or salmon redds):
Flooding occurs in a sub-basin that is immediately down-
gradient of unit.
Surface flooding problems are in a sub-basin farther down-
gradient.
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
2
Wetland is a depression or flat depression with no surface water
leaving it (no outlet)
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch
0
D 5.0. Does the landscape have the potential to support hydrologic function of the site?
1
1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human
land uses (residential at >1 residence/ac, urban, commercial, agriculture, etc.)?
The existing or potential outflow from the wetland is so constrained
by human or natural conditions that the water stored by the wetland
cannot reach areas that flood. Explain why
1
5
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of
the outlet. For wetlands with no outlet, measure from the surface of permanent water or if dry,
the deepest part.
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of
upstream basin contributing surface water to the wetland to the area of the wetland unit itself.
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best
matches conditions around the wetland unit being rated. Do not add points. Choose the highest
score if more than one condition is met.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 10 WSDOT Adapted Form - March 2, 2015
Wetland name or number
There are no problems with flooding downstream of the wetland.points = 0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 1
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
0D 6.2. Has the site been identified as important for flood storage or flood
conveyance in a regional flood control plan?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 11 WSDOT Adapted Form - March 2, 2015
Wetland name or number
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
Aquatic bed 4 structures or more: points = 4
Emergent 3 structures: points = 2
Scrub-shrub (areas where shrubs have > 30% cover)2 structures: points - 1
Forested (areas where trees have > 30% cover)1 structure: points = 0
If the unit has a Forested class, check if :
H 1.2. Hydroperiods
Permanently flooded or inundated 4 or more types present: points = 3
Seasonally flooded or inundated 3 types present: points = 2
Occasionally flooded or inundated 2 types present: points = 1
Saturated only 1 types present: points = 0
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland 2 points
Freshwater tidal wetland 2 points
H 1.3. Richness of plant species
If you counted:> 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
These questions apply to wetlands of all HGM classes.
The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous,
moss/ground-cover) that each cover 20% within the Forested polygon
4
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the
Forested class. Check the Cowardin plant classes in the wetland. Up to 10 patches may be
combined for each class to meet the threshold of ¼ ac or more than 10% of the unit if it is
smaller than 2.5 ac. Add the number of structures checked.
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row are
3
Check the types of water regimes (hydroperiods) present within the wetland. The water regime
has to cover more than 10% of the wetland or ¼ ac to count (see text for descriptions of
hydroperiods ).
0
Count the number of plant species in the wetland that cover at least 10 ft2.Different patches of the same species can be combined to meet the size threshold and you do
not have to name the species. Do not include Eurasian milfoil, reed canarygrass, purple
loosestrife, Canadian thistle 1
Decide from the diagrams below whether interspersion among Cowardin plants classes
(described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats)
is high, moderate, low, or none. If you have four or more plant classes or three classes and open
water, the rating is always high.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 12 WSDOT Adapted Form - March 2, 2015
Wetland name or number
HIGH = 3 points
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 13 WSDOT Adapted Form - March 2, 2015
Wetland name or number
H 1.5. Special habitat features:
Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long)
Standing snags (dbh > 4 in) within the wetland
Total for H 1 Add the points in the boxes above 11
Rating of Site Potential If Score is: 15 - 18 = H 7 - 14 = M 0 - 6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat function of the site?
H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit ).
Calculate:
0 % undisturbed habitat + (0 % moderate & low intensity land uses / 2 ) = 0%
If total accessible habitat is:
> 1/3 (33.3%) of 1 km Polygon points = 3
20 - 33% of 1 km Polygon points = 2
10 - 19% of 1 km Polygon points = 1
< 10 % of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate:
3.76 % undisturbed habitat + (12.13 % moderate & low intensity land uses / 2 ) = 9.825%
Undisturbed habitat > 50% of Polygon points = 3
Undisturbed habitat 10 - 50% and in 1-3 patches points = 2
Undisturbed habitat 10 - 50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3 Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (-2)
≤ 50% of 1km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above -2
Rating of Landscape Potential If Score is: 4 - 6 = H 1 - 3 = M < 1 = L Record the rating on the first page
Site meets ANY of the following criteria:points = 2
It has 3 or more priority habitats within 100 m (see next page)
It is mapped as a location for an individual WDFW priority species
0
0
-2
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose
only the highest score that applies to the wetland being rated .
It provides habitat for Threatened or Endangered species (any plant
or animal on the state or federal lists)
It is a Wetland of High Conservation Value as determined by the
Department of Natural Resources
0
Invasive plants cover less than 25% of the wetland area in every stratum of plants (see
H 1.1 for list of strata )
Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends
at least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at
least 33 ft (10 m)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (> 30 degree slope) OR signs of recent beaver activity are present (cut shrubs
or trees that have not yet weathered where wood is exposed )
At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas
that are permanently or seasonally inundated (structures for egg-laying by amphibians )
3
Check the habitat features that are present in the wetland. The number of checks is the number
of points.
It has been categorized as an important habitat site in a local or
regional comprehensive plan, in a Shoreline Master Plan, or in a
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 14 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Site has 1 or 2 priority habitats (listed on next page) with in 100m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If Score is: 2 = H 1 = M 0 = L Record the rating on the first page
watershed plan
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 15 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/
Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the
earth in soils, rock, ice, or other geological formations and is large enough to contain a human.
WDFW Priority Habitats
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE : This
question is independent of the land use between the wetland unit and the priority habitat.
Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species
of native fish and wildlife (full descriptions in WDFW PHS report ).
Old-growth/Mature forests: Old-growth west of Cascade crest – Stands of at least 2 tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha)
> 32 in (81 cm) dbh or > 200 years of age. Mature forests – Stands with average diameters
exceeding 21 in (53 cm) dbh; crown cover may be less than 100%; decay, decadence, numbers of
snags, and quantity of large downed material is generally less than that found in old-growth; 80-200
years old west of the Cascade crest.
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in
which they can be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species
List. Olympia, Washington. 177 pp.
Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy
coverage of the oak component is important (full descriptions in WDFW PHS report p. 158 – see
web link above ).
Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both
aquatic and terrestrial ecosystems which mutually influence each other.
Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a
dry prairie or a wet prairie (full descriptions in WDFW PHS report p. 161 – see web link above ).
Instream: The combination of physical, biological, and chemical processes and conditions that
interact to provide functional life history requirements for instream fish and wildlife resources.
Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open
Coast Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of
relatively undisturbed are in WDFW report – see web link on previous page ).
Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay
characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast
height of > 20 in (51 cm) in western Washington and are > 6.5 ft (2 m) in height. Priority logs are >
Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m),
composed of basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings.
May be associated with cliffs.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 16 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are
addressed elsewhere.
12 in (30 cm) in diameter at the largest end, and > 20 ft (6 m) long.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 17 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Type Category
Check off any criteria that apply to the wetland. List the category when the appropriate criteria are met.
SC 1.0. Estuarine Wetlands
Does the wetland meet the following criteria for Estuarine wetlands?
The dominant water regime is tidal,
Vegetated, and
With a salinity greater than 0.5 ppt
Yes - Go to SC 1.1 No = Not an estuarine wetland
SC 1.1.
Yes = Category I No - Go to SC 1.2
SC 1.2.Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1.
Yes - Go to SC 2.2 No - Go to SC 2.3
SC 2.2.Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not WHCV
SC 2.3.Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes - Contact WNHP/WDNR and to SC 2.4 No = Not WHCV
SC 2.4.
Yes = Category I No = Not WHCV
SC 3.0. Bogs
SC 3.1.
Yes - Go to SC 3.3 No - Go to SC 3.2
SC 3.2.
Yes - Go to SC 3.3 No = Is not a bog
SC 3.3.
Yes = Is a Category I bog No - Go to SC 3.4
SC 3.4.
Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation
Value and listed it on their website?
Has the WA Department of Natural Resources updated their website to include the list
of Wetlands of High Conservation Value?
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation
in bogs? Use the key below. If you answer YES you will still need to rate the
wetland based on its functions .
Does an area within the wetland unit have organic soil horizons, either peats or mucks,
that compose 16 in or more of the first 32 in of the soil profile?
Does an area within the wetland unit have organic soils, either peats or mucks, that are
less than 16 in deep over bedrock, or an impermeable hardpan such as clay or volcanic
ash, or that are floating on top of a lake or pond?
Does an area with peats or mucks have more than 70% cover of mosses at ground
level, AND at least a 30% cover of plant species listed in Table 4?
NOTE: If you are uncertain about the extent of mosses in the understory, you may
substitute that criterion by measuring the pH of the water that seeps into a hole dug at
least 16 in deep. If the pH is less than 5.0 and the plant species in Table 4 are present,
the wetland is a bog.
Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir,
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Is the wetland within a National Wildlife Refuge, National Park, National Estuary
Reserve, Natural Area Preserve, State Park or Educational, Environmental, or Scientific
Reserve designated under WAC 332-30-151?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing,
and has less than 10% cover of non-native plant species. (If non-native species are
Spartina , see page 25)
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
The wetland has at least two of the following features: tidal channels, depressions with
open water, or contiguous freshwater wetlands.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 18 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Yes = Is a Category I bog No = Is not a bog
p ( ) p , p ,
western red cedar, western hemlock, lodgepole pine, quaking aspen, Engelmann
spruce, or western white pine, AND any of the species (or combination of species)
listed in Table 4 provide more than 30% of the cover under the canopy?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 19 WSDOT Adapted Form - March 2, 2015
Wetland name or number
SC 4.0. Forested Wetlands
Yes = Category I No = Not a forested wetland for this section
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
Yes - Go to SC 5.1 No = Not a wetland in a coastal lagoon
SC 5.1. Does the wetland meet all of the following three conditions?
The wetland is larger than 1/10 ac (4350 ft2)
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
In practical terms that means the following geographic areas:
Long Beach Peninsula: Lands west of SR 103
Grayland-Westport: Lands west of SR 105
Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes - Go to SC 6.1 No = Not an interdunal wetland for rating
SC 6.1.
Yes = Category I No - Go to SC 6.2
SC 6.2.Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No - Go to SC 6.3
SC 6.3.
Yes = Category III No = Category IV
Category of wetland based on Special Characteristics
If you answered No for all types, enter “Not Applicable” on Summary Form
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or, less frequently,
rocks
The lagoon in which the wetland is located contains ponded water that is saline or
brackish (> 0.5 ppt) during most of the year in at least a portion of the lagoon (needs to
be measured near the bottom )
Does the wetland have at least 1 contiguous acre of forest that meets one of these
criteria for the WA Department of Fish and Wildlife’s forests as priority habitats? If you
answer YES you will still need to rate the wetland based on its functions.
Old-growth forests (west of Cascade crest): Stands of at least two tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac
(20 trees/ha) that are at least 200 years of age OR have a diameter at breast height
(dbh) of 32 in (81 cm) or more.
Mature forests (west of the Cascade Crest): Stands where the largest trees are 80-
200 years old OR the species that make up the canopy have an average diameter
(dbh) exceeding 21 in (53 cm).
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation,
grazing), and has less than 20% cover of aggressive, opportunistic plant species (see
list of species on p. 100).
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
Is the wetland west of the 1889 line (also called the Western Boundary of Upland
Ownership or WBUO)? If you answer yes you will still need to rate the wetland
based on its habitat functions.
Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form
(rates H,H,H or H,H,M for the three aspects of function)?
Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and
1 ac?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 20 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Name of wetland (or ID #):Date of site visit:3/5/2018
Rated by Trained by Ecology? Yes No Date of training 3/31/2016
HGM Class used for rating Wetland has multiple HGM classes? Yes No
NOTE: Form is not complete with out the figures requested (figures can be combined ).
Source of base aerial photo/map
OVERALL WETLAND CATEGORY III (based on functions or special characteristics )
1. Category of wetland based on FUNCTIONS
Category I - Total score = 23 - 27 Score for each
Category II - Total score = 20 - 22 function based
X Category III - Total score = 16 - 19 on three
Category IV - Total score = 9 - 15 ratings
(order of ratings
is not
important )
M M 9 = H, H, H
H L 8 = H, H, M
M L Total 7 = H, H, L
7 = H, M, M
6 = H, M, L
6 = M, M, M
5 = H, L, L
5 = M, M, L
4 = M, L, L
3 = L, L, L
2. Category based on SPECIAL CHARACTERISTICS of wetland
X
Depressional & Flats
RATING SUMMARY – Western Washington
List appropriate rating (H, M, L)
HydrologicImproving
Water Quality
MSite Potential
Landscape Potential
Habitat
M
FUNCTION
Offsite Wetland B
J. Downs, J. Pickett, E.Swaim
ESRI 2017
Coastal Lagoon
Interdunal
Value
Score Based on
Ratings 7 7 4 18
H
CHARACTERISTIC Category
Estuarine
Wetland of High Conservation Value
Bog
Mature Forest
Old Growth Forest
None of the above
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 1 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 2 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Maps and Figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Location of outlet (can be added to map of hydroperiods )
Boundary of area within 150 ft of the wetland (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Riverine Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Ponded depressions
Boundary of area within 150 ft of the wetland (can be added to another figure )
Plant cover of trees, shrubs, and herbaceous plants
Width of unit vs. width of stream (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Lake Fringe Wetlands
Map of: Figure #
Cowardin plant classes
Plant cover of trees, shrubs, and herbaceous plants
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Slope Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Plant cover of dense trees, shrubs, and herbaceous plants
Plant cover of dense, rigid trees, shrubs, and herbaceous plants
(can be added to another figure )
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
S 4.1
S 2.1, S 5.1
To answer questions:
H 1.1, H 1.4
H 1.2
S 1.3
H 2.1, H 2.2, H 2.3
L 3.1, L 3.2
L 3.3
H 2.1, H 2.2, H 2.3
R 3.1
R 3.2, R 3.3
To answer questions:
L 1.1, L 4.1, H 1.1, H 1.4
H 1.2
R 1.1
R 2.4
R 1.2, R 4.2
R 4.1
R 2.2, R 2.3, R 5.2
H 2.1, H 2.2, H 2.3
L 1.2
L 2.2
D 1.1, D 4.1
D 2.2, D 5.2
D 4.3, D 5.3
H 2.1, H 2.2, H 2.3
D 3.1, D 3.2
D 3.3
To answer questions:
H 1.1, H 1.4
To answer questions:
D 1.3, H 1.1, H 1.4
D 1.4, H 1.2
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 3 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
S 3.1, S 3.2
S 3.3
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 4 WSDOT Adapted Form - March 2, 2015
Wetland name or number
For questions 1 -7, the criteria described must apply to the entire unit being rated.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO - go to 2 YES - the wetland class is Tidal Fringe - go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO - Saltwater Tidal Fringe (Estuarine)YES - Freshwater Tidal Fringe
NO - go to 3 YES - The wetland class is Flats
If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands.
3. Does the entire wetland unit meet all of the following criteria?
NO - go to 4 YES - The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
The wetland is on a slope (slope can be very gradual ),
The water leaves the wetland without being impounded.
NO - go to 5 YES - The wetland class is Slope
5. Does the entire wetland unit meet all of the following criteria?
The overbank flooding occurs at least once every 2 years.
NO - go to 6 YES - The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding.
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands.
If it is Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be
used to score functions for estuarine wetlands.
The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
The water flows through the wetland in one direction (unidirectional) and usually comes from seeps.
It may flow subsurface, as sheetflow, or in a swale without distinct banks.
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow
depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep).
The unit is in a valley, or stream channel, where it gets inundated by overbank flooding
from that stream or river,
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it.
Groundwater and surface water runoff are NOT sources of water to the unit.
HGM Classification of Wetland in Western Washington
If hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit
with multiple HGM classes. In this case, identify which hydrologic criteria in questions 1 - 7 apply, and go to
Question 8.
At least 30% of the open water area is deeper than 6.6 ft (2 m).
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 5 WSDOT Adapted Form - March 2, 2015
Wetland name or number
NO - go to 7 YES - The wetland class is Depressional
NO - go to 8 YES - The wetland class is Depressional
NOTES and FIELD OBSERVATIONS:
Salt Water Tidal Fringe and any other
class of freshwater wetland
HGM class to
use in rating
Riverine
Depressional
Lake Fringe
If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than
2 HGM classes within a wetland boundary, classify the wetland as Depressional for the rating.
Riverine
Treat as
ESTUARINE
Slope + Lake Fringe
Depressional + Riverine along stream
within boundary of depression
Depressional + Lake Fringe
Riverine + Lake Fringe
NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of
the total area of the wetland unit being rated. If the area of the HGM class listed in column 2 is less than 10%
of the unit; classify the wetland using the class that represents more than 90% of the total area.
HGM classes within the wetland unit
being rated
Slope + Riverine
Slope + Depressional
Depressional
Depressional
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding?
The unit does not pond surface water more than a few inches. The unit seems to be maintained by high
groundwater in the area. The wetland may be ditched, but has no obvious natural outlet.
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM classes. For
example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a
Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE
HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT
(make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for
the rating system if you have several HGM classes present within the wetland unit being scored.
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at
some time during the year? This means that any outlet, if present, is higher than the interior of the wetland.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 6 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 7 WSDOT Adapted Form - March 2, 2015
Wetland name or number
D 1.1. Characteristics of surface water outflows from the wetland:
points = 3
points = 2
points = 1
points = 1
Yes = 4 No = 0
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > ½ of area points = 3
Wetland has persistent, ungrazed plants > 1/10 of area points = 1
Wetland has persistent, ungrazed plants < 1/10 of area points = 0
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4
Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 9
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 2.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
Yes = 1 No = 0
D 2.3. Are there septic systems within 250 ft of the wetland?Yes = 1 No = 0 0
Source Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 2
Rating of Landscape Potential If score is: 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
Yes = 1 No = 0
Yes = 1 No = 0
Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 3
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
1
0
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
2
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet.
Wetland is a depression or flat depression (QUESTION 7 on key)
with no surface water leaving it (no outlet).
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch.
4
D 2.0. Does the landscape have the potential to support the water quality function of the site?
DEPRESSIONAL AND FLATS WETLANDS
D 3.3. Has the site been identified in a watershed or local plan as important
for maintaining water quality (answer YES if there is a TMDL for the basin in
which the unit is found )?
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic
(use NRCS definitions ).
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or
Forested Cowardin classes):
D 2.4. Are there other sources of pollutants coming into the wetland that are
not listed in questions D 2.1 - D 2.3?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river,
lake, or marine water that is on the 303(d) list?
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that
generate pollutants?
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
D 3.0. Is the water quality improvement provided by the site valuable to society?
1
0
2
0
3
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 8 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 9 WSDOT Adapted Form - March 2, 2015
Wetland name or number
D 4.1. Characteristics of surface water outflows from the wetland:
points = 4
points = 2
points = 1
points = 0
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5
Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater” wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in)points = 0
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 7
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 5.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
D 5.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes = 1 No = 0
Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: 3 = H 1 or 2 = M 0 = L Record the rating on the first page
points = 2
points = 1
Flooding from groundwater is an issue in the sub-basin.points = 1
points = 0
DEPRESSIONAL AND FLATS WETLANDS
D 6.0. Are the hydrologic functions provided by the site valuable to society?
The wetland captures surface water that would otherwise flow down-gradient into areas
where flooding has damaged human or natural resources (e.g., houses or salmon redds):
Flooding occurs in a sub-basin that is immediately down-
gradient of unit.
Surface flooding problems are in a sub-basin farther down-
gradient.
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
2
Wetland is a depression or flat depression with no surface water
leaving it (no outlet)
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch
0
D 5.0. Does the landscape have the potential to support hydrologic function of the site?
1
1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human
land uses (residential at >1 residence/ac, urban, commercial, agriculture, etc.)?
The existing or potential outflow from the wetland is so constrained
by human or natural conditions that the water stored by the wetland
cannot reach areas that flood. Explain why
1
5
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of
the outlet. For wetlands with no outlet, measure from the surface of permanent water or if dry,
the deepest part.
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of
upstream basin contributing surface water to the wetland to the area of the wetland unit itself.
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best
matches conditions around the wetland unit being rated. Do not add points. Choose the highest
score if more than one condition is met.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 10 WSDOT Adapted Form - March 2, 2015
Wetland name or number
There are no problems with flooding downstream of the wetland.points = 0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 1
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
0D 6.2. Has the site been identified as important for flood storage or flood
conveyance in a regional flood control plan?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 11 WSDOT Adapted Form - March 2, 2015
Wetland name or number
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
Aquatic bed 4 structures or more: points = 4
Emergent 3 structures: points = 2
Scrub-shrub (areas where shrubs have > 30% cover)2 structures: points - 1
Forested (areas where trees have > 30% cover)1 structure: points = 0
If the unit has a Forested class, check if :
H 1.2. Hydroperiods
Permanently flooded or inundated 4 or more types present: points = 3
Seasonally flooded or inundated 3 types present: points = 2
Occasionally flooded or inundated 2 types present: points = 1
Saturated only 1 types present: points = 0
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland 2 points
Freshwater tidal wetland 2 points
H 1.3. Richness of plant species
If you counted:> 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
These questions apply to wetlands of all HGM classes.
The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous,
moss/ground-cover) that each cover 20% within the Forested polygon
4
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the
Forested class. Check the Cowardin plant classes in the wetland. Up to 10 patches may be
combined for each class to meet the threshold of ¼ ac or more than 10% of the unit if it is
smaller than 2.5 ac. Add the number of structures checked.
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row are
3
Check the types of water regimes (hydroperiods) present within the wetland. The water regime
has to cover more than 10% of the wetland or ¼ ac to count (see text for descriptions of
hydroperiods ).
1
Count the number of plant species in the wetland that cover at least 10 ft2.Different patches of the same species can be combined to meet the size threshold and you do
not have to name the species. Do not include Eurasian milfoil, reed canarygrass, purple
loosestrife, Canadian thistle 1
Decide from the diagrams below whether interspersion among Cowardin plants classes
(described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats)
is high, moderate, low, or none. If you have four or more plant classes or three classes and open
water, the rating is always high.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 12 WSDOT Adapted Form - March 2, 2015
Wetland name or number
HIGH = 3 points
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 13 WSDOT Adapted Form - March 2, 2015
Wetland name or number
H 1.5. Special habitat features:
Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long)
Standing snags (dbh > 4 in) within the wetland
Total for H 1 Add the points in the boxes above 12
Rating of Site Potential If Score is: 15 - 18 = H 7 - 14 = M 0 - 6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat function of the site?
H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit ).
Calculate:
0 % undisturbed habitat + (0 % moderate & low intensity land uses / 2 ) = 0%
If total accessible habitat is:
> 1/3 (33.3%) of 1 km Polygon points = 3
20 - 33% of 1 km Polygon points = 2
10 - 19% of 1 km Polygon points = 1
< 10 % of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate:
3.76 % undisturbed habitat + (12.13 % moderate & low intensity land uses / 2 ) = 9.825%
Undisturbed habitat > 50% of Polygon points = 3
Undisturbed habitat 10 - 50% and in 1-3 patches points = 2
Undisturbed habitat 10 - 50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3 Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (-2)
≤ 50% of 1km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above -2
Rating of Landscape Potential If Score is: 4 - 6 = H 1 - 3 = M < 1 = L Record the rating on the first page
Site meets ANY of the following criteria:points = 2
It has 3 or more priority habitats within 100 m (see next page)
It is mapped as a location for an individual WDFW priority species
0
0
-2
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose
only the highest score that applies to the wetland being rated .
It provides habitat for Threatened or Endangered species (any plant
or animal on the state or federal lists)
It is a Wetland of High Conservation Value as determined by the
Department of Natural Resources
0
Invasive plants cover less than 25% of the wetland area in every stratum of plants (see
H 1.1 for list of strata )
Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends
at least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at
least 33 ft (10 m)
Stable steep banks of fine material that might be used by beaver or muskrat for
denning (> 30 degree slope) OR signs of recent beaver activity are present (cut shrubs
or trees that have not yet weathered where wood is exposed )
At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas
that are permanently or seasonally inundated (structures for egg-laying by amphibians )
3
Check the habitat features that are present in the wetland. The number of checks is the number
of points.
It has been categorized as an important habitat site in a local or
regional comprehensive plan, in a Shoreline Master Plan, or in a
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 14 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Site has 1 or 2 priority habitats (listed on next page) with in 100m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If Score is: 2 = H 1 = M 0 = L Record the rating on the first page
watershed plan
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 15 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/
Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the
earth in soils, rock, ice, or other geological formations and is large enough to contain a human.
WDFW Priority Habitats
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE : This
question is independent of the land use between the wetland unit and the priority habitat.
Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species
of native fish and wildlife (full descriptions in WDFW PHS report ).
Old-growth/Mature forests: Old-growth west of Cascade crest – Stands of at least 2 tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha)
> 32 in (81 cm) dbh or > 200 years of age. Mature forests – Stands with average diameters
exceeding 21 in (53 cm) dbh; crown cover may be less than 100%; decay, decadence, numbers of
snags, and quantity of large downed material is generally less than that found in old-growth; 80-200
years old west of the Cascade crest.
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in
which they can be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species
List. Olympia, Washington. 177 pp.
Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy
coverage of the oak component is important (full descriptions in WDFW PHS report p. 158 – see
web link above ).
Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both
aquatic and terrestrial ecosystems which mutually influence each other.
Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a
dry prairie or a wet prairie (full descriptions in WDFW PHS report p. 161 – see web link above ).
Instream: The combination of physical, biological, and chemical processes and conditions that
interact to provide functional life history requirements for instream fish and wildlife resources.
Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open
Coast Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of
relatively undisturbed are in WDFW report – see web link on previous page ).
Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay
characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast
height of > 20 in (51 cm) in western Washington and are > 6.5 ft (2 m) in height. Priority logs are >
Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m),
composed of basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings.
May be associated with cliffs.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 16 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are
addressed elsewhere.
12 in (30 cm) in diameter at the largest end, and > 20 ft (6 m) long.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 17 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Wetland Type Category
Check off any criteria that apply to the wetland. List the category when the appropriate criteria are met.
SC 1.0. Estuarine Wetlands
Does the wetland meet the following criteria for Estuarine wetlands?
The dominant water regime is tidal,
Vegetated, and
With a salinity greater than 0.5 ppt
Yes - Go to SC 1.1 No = Not an estuarine wetland
SC 1.1.
Yes = Category I No - Go to SC 1.2
SC 1.2.Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1.
Yes - Go to SC 2.2 No - Go to SC 2.3
SC 2.2.Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not WHCV
SC 2.3.Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes - Contact WNHP/WDNR and to SC 2.4 No = Not WHCV
SC 2.4.
Yes = Category I No = Not WHCV
SC 3.0. Bogs
SC 3.1.
Yes - Go to SC 3.3 No - Go to SC 3.2
SC 3.2.
Yes - Go to SC 3.3 No = Is not a bog
SC 3.3.
Yes = Is a Category I bog No - Go to SC 3.4
SC 3.4.
Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation
Value and listed it on their website?
Has the WA Department of Natural Resources updated their website to include the list
of Wetlands of High Conservation Value?
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation
in bogs? Use the key below. If you answer YES you will still need to rate the
wetland based on its functions .
Does an area within the wetland unit have organic soil horizons, either peats or mucks,
that compose 16 in or more of the first 32 in of the soil profile?
Does an area within the wetland unit have organic soils, either peats or mucks, that are
less than 16 in deep over bedrock, or an impermeable hardpan such as clay or volcanic
ash, or that are floating on top of a lake or pond?
Does an area with peats or mucks have more than 70% cover of mosses at ground
level, AND at least a 30% cover of plant species listed in Table 4?
NOTE: If you are uncertain about the extent of mosses in the understory, you may
substitute that criterion by measuring the pH of the water that seeps into a hole dug at
least 16 in deep. If the pH is less than 5.0 and the plant species in Table 4 are present,
the wetland is a bog.
Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir,
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Is the wetland within a National Wildlife Refuge, National Park, National Estuary
Reserve, Natural Area Preserve, State Park or Educational, Environmental, or Scientific
Reserve designated under WAC 332-30-151?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing,
and has less than 10% cover of non-native plant species. (If non-native species are
Spartina , see page 25)
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
The wetland has at least two of the following features: tidal channels, depressions with
open water, or contiguous freshwater wetlands.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 18 WSDOT Adapted Form - March 2, 2015
Wetland name or number
Yes = Is a Category I bog No = Is not a bog
p ( ) p , p ,
western red cedar, western hemlock, lodgepole pine, quaking aspen, Engelmann
spruce, or western white pine, AND any of the species (or combination of species)
listed in Table 4 provide more than 30% of the cover under the canopy?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 19 WSDOT Adapted Form - March 2, 2015
Wetland name or number
SC 4.0. Forested Wetlands
Yes = Category I No = Not a forested wetland for this section
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
Yes - Go to SC 5.1 No = Not a wetland in a coastal lagoon
SC 5.1. Does the wetland meet all of the following three conditions?
The wetland is larger than 1/10 ac (4350 ft2)
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
In practical terms that means the following geographic areas:
Long Beach Peninsula: Lands west of SR 103
Grayland-Westport: Lands west of SR 105
Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes - Go to SC 6.1 No = Not an interdunal wetland for rating
SC 6.1.
Yes = Category I No - Go to SC 6.2
SC 6.2.Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No - Go to SC 6.3
SC 6.3.
Yes = Category III No = Category IV
Category of wetland based on Special Characteristics
If you answered No for all types, enter “Not Applicable” on Summary Form
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or, less frequently,
rocks
The lagoon in which the wetland is located contains ponded water that is saline or
brackish (> 0.5 ppt) during most of the year in at least a portion of the lagoon (needs to
be measured near the bottom )
Does the wetland have at least 1 contiguous acre of forest that meets one of these
criteria for the WA Department of Fish and Wildlife’s forests as priority habitats? If you
answer YES you will still need to rate the wetland based on its functions.
Old-growth forests (west of Cascade crest): Stands of at least two tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac
(20 trees/ha) that are at least 200 years of age OR have a diameter at breast height
(dbh) of 32 in (81 cm) or more.
Mature forests (west of the Cascade Crest): Stands where the largest trees are 80-
200 years old OR the species that make up the canopy have an average diameter
(dbh) exceeding 21 in (53 cm).
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation,
grazing), and has less than 20% cover of aggressive, opportunistic plant species (see
list of species on p. 100).
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
Is the wetland west of the 1889 line (also called the Western Boundary of Upland
Ownership or WBUO)? If you answer yes you will still need to rate the wetland
based on its habitat functions.
Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form
(rates H,H,H or H,H,M for the three aspects of function)?
Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and
1 ac?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 20 WSDOT Adapted Form - March 2, 2015
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 23 of 25
Attachment E – Wetland Rating Maps
Pictometry International Corp. 2015
DCT MONSTER ROAD - WETLAND RATING MAP
¢
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO. of 5
3/26/2018
1190.0015
DLS
1
0 250 500125 Feet
Cowardin Map
Aquatic Bed
Emergent
Forested
Scrub-Shrub
330' Boundary
Site Boundary
1 " = 250 '
Wetland A
Wetland B
Percentage of Emergent Class 64.22%
Percentage of Scrub-Shrub Class 10.75%
Percentage of Forested Class 25.03%
Percentage of Aquatic Bed Class 5.22%
Percentage of Emergent Class 57.46%
Percentage of Scrub-Shrub Class 12.66%
Percentage of Forested Class 24.66%
H.1.0 Presence Cowardin Classes in Wetland A
H.1.1
H.1.0 Presence Cowardin Classes in Wetland B
H.1.1
Pictometry International Corp. 2015
DCT MONSTER ROAD - WETLAND RATING MAP
¢
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO. of 5
3/26/2018
1190.0015
DLS
2
0 200 400100 Feet
Hydroperiod Map
150' Boundary
Permanently Flooded
Seasonally Flooded
Site Boundary
1 " = 200 '
Wetland A
Wetland B
Percentage of Seasonally Flooded or Inundated 100.00%
Percentage of Permanently Flooded or Inundated 21.88%
Percentage of Seasonally Flooded or Inundated 78.10%
H.1.0 Presence of Hydroperiods in Wetland B
H.1.2.
H.1.2.
H.1.0 Presence of Hydroperiods in Wetland A
City of Renton - IT GIS and PW Utilities, Pictometry International Corp.
2015
DCT MONSTER ROAD - WETLAND RATING MAP
¢
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO. of 5
3/26/2018
1190.0015
DLS
3
0 500 1,000250 Feet
Contributing Basin Map
ààààààààààààààà
ààà
ààà
Wetlands
Site Boundary
SW Pump Station
SW Discharge
SW Gravity Main
Contributing Basin
1 " = 500 '
Wetland A
Wetland B
Area of Contributing Basin (SF)2,294,349
Area of Wetlands A & B (SF)203,868
Percent of Wetlands A & B within
Contributing Basin 8.886%
Area of Contributing Basin 2,294,349
Area of Intensive Human Land Uses 2,085,835
Percent of Intensive Human Land Use
within Contributing Basin 91%
D.4.0
D.4.3
D.5.0
D.5.3
Pictometry International Corp. 2015
DCT MONSTER ROAD - WETLAND RATING MAP
¢
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO. of 5
3/26/2018
1190.0015
DLS
4
0 1,500 3,000750 Feet
Habitat Map
ààààààààà
ààà
Wetlands
Site Boundary
High Intensity
Moderate & Low Intensity
Undisturbed Habitat
1 KM Polgon
1 " = 1,500 '
SITE
Abutting Undisturbed Habitat 0.00%
Abutting Moderate & Low Intensity Land Uses 0.00%
Accessible Habitat 0.00%
Undisturbed Habitat 3.76%
Moderate & Low Intensity Land Uses 12.13%
Undisturbed Habitat in 1 KM Polygon 9.83%
High Intensity Land Use in 1 KM Polygon 84.11%
H.2.2
H.2.3
H.2.0 Wetlands A & B
H.2.1
Airbus, USGS, NGA, NASA, CGIAR,N
Robinson,NCEAS,NLS,OS,NMA,Geodatastyrelsen and the GIS User
Community
DCT MONSTER ROAD - WETLAND RATING MAP
¢
0 2 41 Miles
601 MONSTER ROAD SWRENTON, WA 98055
KING COUNTY PARCEL NUMBER:242304-9008
DCT MONSTER ROAD
www.soundviewconsultants.com
2907 Harborview Dr., Suite D, Gig Harbor, WA 98335Phone: (253) 514-8952 Fax: (253) 514-8954
Soundview ConsultantsEnvironmental Assessment • Planning • Land Use Solutions LLC
DATE:
JOB:
BY:
SCALE:
FIGURE NO. of 5
3/26/2018
1190.0015
DLS
5
Habitat Map
303d Assessed Waters
Hydrography
Sub Basin
1 " = 2 mi
SITE
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 24 of 25
Attachment F – Qualifications
All field inspections, jurisdictional wetland determinations, OHW determinations, habitat
assessments, and supporting documentation, including this Wetland and Fish and Wildlife Habitat
Assessment Technical Memorandum prepared for the Monster Road Site, were prepared by, or
under the direction of, Jon Pickett of SVC. In addition, site inspections were performed by Emily
Swaim, and report preparation was performed by Kyla Caddey.
Jon Pickett
Senior Environmental Planner
Professional Experience: 9 years
Jon Pickett is a Senior Scientist/Environmental Planner with diverse professional experience in habitat
development as a Regional Biologist and Environmental Project Manager, with an emphasis in wetland
restoration and enhancement. Jon has extensive experience successfully planning, developing, securing
funding, managing and implementing numerous large-scale wetland habitat projects aimed at restoring
the biological and physical functions of wetlands throughout California’s Central Valley and Southern
California. During this time he managed a 2,200 acre private wetland and upland habitat complex as
a public trust resource for conservation and consumptive use. He worked to ensure projects were
designed and implemented to achieve habitat restoration goals, including reclamation of wetland and
floodplain habitats, reintroduction of aquatic complexity and habitat, and reestablishment of riparian
corridor.
Jon has worked with Federal and State agencies and private entities on land acquisitions for
conservational habitat and public use, including prioritizing acquisitions relative to value and
opportunity and funding. In addition, Jon has experience in regulatory coordination to ensure projects
operated in compliance with Federal, State and local environmental regulations, preparing permit
documentation, coordinating with all pertinent agencies and stakeholders, and developing and
maintaining appropriate permitting timelines to ensure timely approvals. He also oversaw earthwork
construction components and revegetation efforts, as well as post-project monitoring, with an
emphasis in native vegetation establishment and natural channel morphology.
Jon earned a Bachelor of Science degree in Natural Resource Sciences from Washington State
University and Bachelor of Science Minor in Forestry from Washington State University.
Emily Swaim
Wetland Scientist/Field Geologist
Professional Experience: 4 years
Emily Swaim is a Wetland Scientist and Field Geologist with a background in conducting Phase I, II
and III Environmental Site Assessments (ESAs), underground natural gas pipeline and overhead
electrical transmission line project assessment and environmental inspections, construction oversight,
stormwater compliance inspections, soil sampling, delineating and assessing wetland and aquatic
systems, and stormwater, floodplain, and wetland permitting. Ms. Swaim’s expertise focuses on
projects involving sensitive wetland and stream habitats where extensive team coordination and
various regulatory challenges must be carefully and intelligently managed from project inception to
completion.
Emily earned a Bachelor of Science degree in Geology from Illinois State University and Wetland
Science and Management Professional Certification from the University of Washington, Seattle. She
Soundview Consultants LLC March 20, 2018
1190.0015 Monster Road – Wetland and Fish and Wildlife Habitat Assessment Page 25 of 25
is also educated in Environmental Science from Iowa State University. Her education and experience
has provided her with extensive knowledge on soils, wetland science, hydrogeology, sedimentology,
environmental law, environmental geology, landscape ecology, and structural geology. Ms. Swaim has
been formally trained in Hazardous Waste Operations and Emergency Response (HAZWOPER) and
is Occupational Health and Safety Administration (OSHA) 30-hour Construction and 10-hour
Construction certified. She is also a Pierce County Qualified Wetland Specialist and Wetland
Professional In-Training (WPIT) through the Society of Wetland Scientists.
Kyla Caddey
Staff Scientist
Professional Experience: 3 years
Kyla Caddey is a Staff Scientist and Pierce County Qualified Wildlife Biologist with a diverse
background in riparian habitat restoration, stream and wetland ecology, wildlife ecology and
conservation, and wildlife and natural resource assessments and monitoring. Kyla has advanced
expertise in report preparation, grant writing, environmental education, data compilation and statistical
analysis. Kyla has field experience performing in-depth studies in both the Pacific Northwest and
Central American ecosystems. She currently performs wetland, stream, and shoreline delineations and
fish and wildlife habitat assessments; conducts environmental code analysis; and prepares
environmental assessment and mitigation reports, biological evaluations, and permit applications to
support clients through the regulatory and planning process for various land use projects.
Kyla earned a Bachelor of Science degree in Environmental Science and Resource Management from
the University of Washington, Seattle with a focus in Wildlife Conservation and a minor in
Quantitative Science. She has received formal training through the Washington State Department of
Ecology and Coastal Training Program in Using the Credit-Debit Method in Estimating Wetland
Mitigation Needs, How to Determine the Ordinary High Water Mark, Using Field Indicators for
Hydric Soils, How to Administer Development Permits in Washington Shorelines, Puget Sound
Coastal Processes, and Forage Fish Survey Techniques.