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Home My WebLink AboutTechnical Memorandum1 1 1 1 1 ENGINEERING. PLANNING. ENVIRONMENTAL SCIENCES 411 108th AVENUE NE, SUITE 1800 BELLEVUE, WA 98004-SS71 T. 42S.458.6200 F. 425.458.6363 WWW.p2rametrix.com TECHNICAL MEMORANDUM ' Date: July 20, 2011 To: Steve Lee, City of Renton ' From: Matthew Maynard, Colin Worsley, PWS Subject: Wetland Impacts cc: Jenna Friebel, Parametrix Project Number: 558-1779-038 Project Name: Elliot Spawning Channel Reconstruction PURPOSE The purpose of this memorandum is to provide impacts to wetlands and their buffers caused by the Elliot Spawning Channel Reconstruction Project to satisfy the modified requirements of the Waiver of Submittal Requirements for Land Use Applications (dated May 13, 2011). ' PROJECT DESCRIPTION The project is a spawning channel maintenance project. The channel was originally built in 2001 as part of a mitigation project to offset the loss of sockeye salmon spawning habitat as a result of over -dredging in the lower river. The overdredging resulted during the U.S. Army Corps of Engineer's (Corps) dredging of the lower 1.25 miles of the Cedar River as part of the lower Cedar River Section 205 Flood Hazard ' Reduction Project. The channel successfully provided additional habitat for various life history stages of salmonids present in the Cedar River until the 2009 flood event when the Cedar River overtopped its banks and scoured and deposited silt and woody debris in the upper 900 feet of the spawning channel. Woody debris, erosion control structures, and habitat plantings were either washed away or damaged ' during these flood events. In addition, spawning gravels were displaced and silt was deposited on the channel bottom. The original design also included a permeable segment of levee. This segment of levee was also damaged in the floods and the hydrologic connection to the Cedar River was altered due to ' sediment deposition on the waterside of the levee. The project will include removing silt, restoring spawning gravel with smooth river rock along the channel bottom, and replacing large woody debris. In addition, any riparian areas disturbed during the work will be restored with topsoil refinishing, reseeding, mulching, and replanting native plants on the channel banks. Until riparian planting matures, erosion control measures are required. Materials such as straw bales, filter fabric, and sand bags will be incorporated. The City of Renton has received funding approval from the Federal Emergency Management Agency (FEMA) to reconstruct, restore, and rehabilitate the spawning habitat within the ' channel to pre -flood conditions with National Marine Fisheries Service (NMFS) and U.S. Fish and Wildlife Service (USFWS) concurrence already. 1 1 1 1 1 t 1 1 TECHNICAL MEMORANDUM (CONTINUED) METHODS Parametrix biologists conducted a site visit on April 13, 2011 to delineate wetlands within the project area. The project area is located north of Ron Regis Park and the Maplewood Golf Course (Attachment A). Biologists delineated an on-site wetland using methods specified in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987) and the Regional Supplement to the Corps of Engineers Wetlands Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0) (Corps 2010). These methods comply with current state requirements (WAC 173-22-035). Sample plots were investigated in areas that potentially met wetland criteria throughout the site and data were documented on wetland determination data forms (Attachment B). The delineated wetland was classified according to the United States Fish and Wildlife Service (USFWS) Classification of Wetlands and Deepwater Habitats of the United States (Cowardin et at. 1979) and A Hydrogeomorphic (HGM) Classification for Wetlands (Brinson 1993). The wetland was rated according to City of Renton Municipal Code (RMC) 4-3-050 M.1 and the Washington State Wetland Rating System for Western Washington — Revised (Hruby 2004) (Attachment Q. The buffer width assigned to the wetland in the project area reflect requirements of the City of Renton (RMC 4-3-050 M.6). Photographs of the wetland are included in Attachment D. WETLANDS Parametrix identified and delineated one wetland (Wetland 1) in the project area (Attachment A). The wetland boundary and sample plots were marked in the field with flags and instrument -surveyed with a handheld GPS unit (Trimble(I GeoXHTM). Wetland 1 is approximately 0.03 acre (1,508 square feet), located north of the Maplewood Golf Course and southwest of the Elliot Spawning Channel, near the west end of the channel. This wetland is in a depression in the floodplain of the Cedar River, frequently flooded by the ' Elliot Spawning Channel and Cedar River. No inlet or outlet is present, except during flood events. Standing water was observed over approximately 75 percent of the wetland during the field investigation with depths up to 12 inches. Wetland 1 has seasonally inundated water regime. Wetland I has a shrub community dominated by Pacific willow (Salix lucida) and an understory dominated by reed canarygrass (Phalaris arundinacea). Other species observed include red alder saplings (Alnus rubra), red -osier dogwood (Cornus sericea), salmonberry (Rubus spectabilis), creeping buttercup ' (Ranunculus repens), Japanese knotweed (Polygonum cuspidatum), and bitter dock (Rumex oblusifolius). Soils examined in Wetland 1 consisted of a dark grayish brown (10YR 412) fine sandy loam with dark yellowish brown (IOYR 416) redoximorphic concentrations over a dark gray (5Y 411) sand with dark yellowish brown (10YR 416) redoximorphic concentrations. Inclusions of a dark grayish brown (1 OYR 4/2) silt loam with dark brown (7.5YR 314) redoximorphic concentrations were also present in the ' lower layer. The wetland and contiguous riparian buffer associated with Wetland 1 is vegetated primarily with deciduous trees, shrubs, and invasive weeds. Dominant species include black cottonwood ' (Populus balsamifera), red alder (Alnus rubra), salmonberry (Rubus speclabilis), Indian plum (Oemleria cerasiformis), willows (Salix spp.) common snowberry (Symphoricarpos albus), Japanese knotweed (Polygonum cuspidatum), reed canarygrass (Phalaris arundinacea), and Himalayan blackberry ' (Rubus armeniacus). The greater riparian corridor is also used for passive recreation. The surrounding environment includes a city park, regional trail, and golf course. City of Renton Welland Impacts 558-1779-038 July 20, 2011 1 TECHNICAL MEMORANDUM (CONTINUED) ' Wetland I is classified as a palustrine scrub -shrub (PSS) wetland under the USFWS (Cowardin et al. 1979) system and a riverine wetland under the HGM system (Brinson 1993; Hruby 2004). Wetland 1 is rated a Category 2 according to the City of Renton and a Category III according to Ecology. The wetland scored 41 points on the Washington State Wetland Rating System for Western Washington rating form (Attachment Q. The required standard buffer width is 50 feet for Category 2 wetlands in the City of Renton (RMC 4-3-050 M.6). ' WETLAND IMPACTS AND MITIGATION No impacts will occur to Wetland las a result of the Elliot Spawning Channel Reconstruction Project. In addition, there will be no permanent impacts to wetland buffers. Best management practices (BMPs) will be implemented to avoid or reduce adverse impacts to critical areas during construction. BMPs will be implemented for spill control and erosion and sediment control. ' Measures used may include mulching, matting, and netting; filter fabric fencing; and surface water interceptor swales and ditches. Significant long-term water quality impacts are not expected if erosion control BMPs, and spill containment measures are properly implemented, monitored, and maintained ' during construction. A temporary erosion and sediment control plan will be implemented to minimize and control pollution and erosion from stormwater. There will be approximately 0.04 acre (1,644 square feet) of temporary impact to the buffer of Wetland 1 ' (Attachment A). The buffers of Wetland 1 overlap with the riparian buffer of the Cedar River and Elliot Spawning Channel and will be planted as part of the channel access restoration and side channel riparian planting (Attachment E). iREFERENCES 1 1 Brinson, M.M. 1993. A hydrogeomorphic classification for wetlands. Technical Report WRP-DE-4. U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, Mississippi. Corps (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, and C.V. Noble. ERDCIEL TR -08-13. Vicksburg, Mississippi: U.S. Army Engineer Research and Development Center. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. Government Printing Office, Washington, D.C. Ecology (Washington State Department of Ecology). 1997. Washington State wetlands identification and delineation manual. Washington State Department of Ecology, Publication No. 96-94. Olympia, Washington. Environmental Laboratory. 1987. Corps of Engineers wetland delineation manual. U.S. Army Corps of Engineers Waterways Experiment Station, Tech. Report Y-87-1. Vicksburg, Mississippi. Hruby, T. 2004. Washington State wetland rating system for Western Washington - Revised. Washington State Department of Ecology Publication # 04-06-025. Olympia, Washington. City of Renton ii'etland Impacts 558-1774-038 July 20. 2011 1 1 1 t 1 1 1 .1 1 1 1 t ATTACHMENT A JARPA SHEETS 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 PROJECT LOCATION C��, �� MAPLEWOOD GOLF COURSE PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR RIVER DATUM: VERT. NAVD 86 (CORPS) HORIZ: NAD 83/91 (CORPS) BASIN: CEbARISAMMAMISH i' ADJACENT PROPERTY OWNERS: CITY OF RENTON SE 144TH ST VICINITY MAP 0 540 SCALE 1'= 5W APPLICANT: CITY OF RENTON, WA Issaquah Tukwila Renton LOCATION sell FieI'y RON RE( 3E RsNTO MAPLE VgLL YID PROPOSED: ELLIOT SPAWNING CHANNEL LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N. R. 5E, W. M. FROM: LATITUDE - 47' 28'10' LONGITUDE - 12Y 08'51' TO: LATITUDE - 4728'10" LONGITUDE -;22'09'06' DATE: JULY 2011 SHEET: 1 OF 10 1 1 1 1 1 1 1 1 1 1 1 1 t 1 1 1 1 1 1 EXIST. CHANNEL ROCK EDGE DAM DEWATERING PIT LAND APPLY- LEVEL PPLY LEVEL l SPREADER � WETLAND #1 WETLAND 50' BUFFER �I APPROXIMATE EXIST. f CHANNEL CENTERLINE EXIST. 6' HIGH CHAINLINK FENT LEGEND: WETLAND — — — — WETLAND BUFFER TEMP. WETLAND WETLAND BOUNDARY r." BUFFER IMPACT ----ORDINARY HIGH WATER LINE -----c-----e— CUT LINE (DAYLIGHT) -----r-----r— FILL LINE (DAYLIGHT) — -- — —EXISTING CHANNEL CENTER LINE — — —PROPOSED CENTERLINE CHANNEL EXISTING RIPRAP Q EXISTING LEVEE SANDBAG DAM PURPOSE: TO REPAIR THE EXISTING SPAWNING TEMPORARY EROSION CHANNEL ADJACENT TO THE CEDAR CONTROL RIVER DATUM: VERT: NAVD 88 (CORPS) 0 80 HORIZ: NAD 83181 (CORPS) BASIN: CEDARISAMMAMISH SCALE 1"a 80' ADJACENT PROPERTY OWNERS: APPLICANT: CITY OF RENTON, WA CITY OF RENTON FISH EXCLUSION NET n SANDBAG DAM (PLACED AT ENTRANCE FROM RIVER) N CHANNEL HIGH WATER TEMPORARY ACCESS ROAD LIMITS OF IMPACT XISTING ACCE55 ROAD �_ If PROPOSED CHAD CENTERLINE IFTEMPORARY ACCESS ROAD A 63 NOTES IMPACTS WITHIN OHW ARE COUNTED AS STREAM IMPACTS AND NOT AS WETLAND BUFFER IMPACTS. SEE TABLE 8e OF JARPA. PROPOSED: ELLIOT SPAWNING CHANNEL LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N, R. SE, W. M. FROM: LATITUDE -47'28'10' LONGITUDE- 122°08'51" TO: LATITUDE - 47.28'10' LONGITUDE - 122'0"6* DATE: JULY 2011 SHEET: 2 at 10 1 1 1 1 1 1 1 1 1 t OHWL TYP. AN 2-6-2010 �� 12jl<<CEDARS�� ,�� 4 XISTING �)�J Q; ' ` D10.�,� :. 5 C ACCESS S ( �, ;4)C < }�,<: { < SS)(< 4 EXCLUS]OtJI CC C�°<`C�.IC`��L<<`Ci�iC�C.� �t�111`1;11 G� ROAD ;:�( ��< 1�C��,.,ci, ;�5�1�.SANBAG do v ��{•fit ,17 EXISTING LEVEE/RIPRAP Q'f—UMITS OF RDINARY TEMPORARY �`�'• .�.. IMPACT HIGH WATER ACCESS v '� t ROAD APPROXIMATE EXIST, CHANNEL CENTERLINE EXIST. 6' HIGH CHAINLINK FENCE LEGEND: s WETLAND — — — — WETLAND BUFFER 5 TEMP. WETLAND WETLAND BOUNDARY BUFFER IMPACT ----ORDINARY HIGH WATER LINE -----c-----c— CUT LINE (DAYLIGHT) % C -----►-----�— FILL LINE (DAYLIGHT) — -- — — EXISTING CHANNEL CENTER LINE — — — PROPOSED CENTERLINE CHANNEL 3 EXISTING RIPRAP y EXISTING LEVEE SANDBAG DAM PURPOSE: TO REPAIR THE EXISTING SPAWNING TEMPORARY EROSION 3 CHANNEL ADJACENT TO THE CEDAR CONTROL RIVER DATUM: VERT: NAVD 88 (CORPS) HORIZ: NAD 83/91 (CORPS) BASIN: CEDARISAMMAMISH ADJACENT PROPERTY OWNERS: CITY OF RENTON DAM PROPOSED CHANNEL CENTERLINE PROPOSED: ELLIOT SPAWNING CHANNEL 0 Bo LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N. R. 5E, W. M. SCALEI" - W FROM: LATITUDE -17'28'10" LONGITUDE - 1221oa'51" APPLICANT: CITY OF RENTON. WA TO: LATITUDE -17'28'10' LONGITUDE - 122'09'08" DATE: JULY 2011 SHEET: 3 of 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 %I SELECTIVE REMOVAL OF DEBRIS FOR FISH PASSAGE WITHIN CHANNEL 01 RDINARY HIGH WATER WETLAND IMITS OF BUFFEM -IMPACT ` 1 , 1 ------------ --- A s LEGEND: ' 0 WETLAND — ORDINARY HIGH WATER LINE -----e-----e- CUT LINE (DAYLIGHT) TEMP. WETLAND ---r-----r- FILL LINE •-'.••:••' BUFFERIMPAGT -' (DAYLIGHT) LARGE WOODY — ' ' — EXISTING CHANNEL CENTER LINE I DEBRIS - —PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP WETLAND BOUNDARY 0 EXISTING LEVEE i PURPOSE: TO REPAIR THE EXISTING SPAWNING PROPOSED: ELLIOT SPAWNING CHANNEL CHANNEL ADJACENT TO THE CEDAR RIVER IMPACTS PLAN DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22, T. 23 N. R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE 1"m 20' FROM: LATITUDE - 47'28'10' PROPERTY OWNERS: LONGITUDE - 122'08'51" ADJACENTAPPLICANT: CITY OF RENTON, WA T0: LATITUDE - 47'28'10" CITY NTON PROPS d LONGITUDE - 122'09'06" y DATE: JULY 2011 SHEET: 4 of 10 1 1 1 1 1 1 1 1 1 MATCHLINE SEE SHEET 4 �, 7 - - --� 11 Al1 1 11L 1 �4, 'I? Ii �', ''1 N;-'r----_•� ; `'`4 � IIf 11'11 UJ I I• � � ... + ; J '•1 e Il f '4 - `1'f i sI -111_ �, i` 1 '•.•:.: •.'• •fi 4i 11 4 i' �' 4'1 1, ' I • wf I ' 1 — LIMITS OF In '; 411 .. ! I, IMPACT 11 II . 1 WETLAND BUFFER A,. . . .� IMITS OF IMPACT 1 RDINARY HIGH WATER S I /1II op LEGEND: i --- WA�FILN I REET`6 -- WETLAND ---- ORDINARY HIGH WATER LINE TEMP. WETLAND ---- -----C- CUT LINE (DAYLIGHT) ___�_____r_ FILL LINE DAYLIGHT ' BUFFER IMPACT -' ( ) LARGE WOODY ' .. — EXISTING CHANNEL CENTER LINE DEBRIS PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP 5y WETLAND BOUNDARY 0 EXISTING LEVEE 4 PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR 3 IMPACTS PLAN RIVER DATURA: VERT: NAVD 88 (CORPS) 0 2D LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S- 22, T. 23 N, R. 5E. W. M. BASIN: CEDARISAMMAMISH SCALE 1"- 201 FROM: LATITUDE -47'28'10" LONGITUDE - 122°08'5111 E PROPS ADJACENT T PROPERTY OWNERS: APPLICANT: CITY OF RENTONENTON. WA TO: LATITUDE -47'28'10" CITY LONGITUDE - 122'09'06' DATE: JULY 2011 SHEET: 5 of 10 1 1 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1 1 .1■ MATCHLINE SEE SHEET 5 ' S1 I I 1 f + \ n \`' rl1 ,N,' II _ ------------------ EXISTING �'` 1 r' 1 I I + -- 1 \\ EXISTING Wf�iLAND LEVEE n BUFFER 1� ; 1 d ; 83 LEGEND: WETLAND ----ORDINARY HIGH WATER LINE WETLAND -----c-----c— CLIT LINE (DAYLIGHT) L BUFFER IMPACT BUFF ----,�----_i— FILL LINE {DAYLIGHT) LARGE WOODY -EXISTING CHANNEL CENTER LINE DEBRIS -PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP "' WETLAND BOUNDARY EXISTING LEVEE 6 PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR RIVER DATUM: VERT: NAVD 88 (CORPS) HORIZ: NAD 83191 (CORPS) DAMN: CEDARISAMMAMISH ADJACENT PROPERTY OWNERS: CITY OF RENTON LE A —ORDINARY HIGH WATER co —014ITS OF 4 PACT 1 I I PROPOSED: ELLIOT SPAWNING CHANNEL IMPACTS PLAN 0 20 LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N, R. 5E, W. M. SCALE 1"=2a FROM: LATITUDE -47°28'10' LONGITUDE -122°08'51" APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47°28'10" LONGITUDE -122'09'06' DATE: JULY 2011 SHEET: 8 of 10 1 1 1 1 i 1 F1 1 1 i i t J MATCHLINE SEE SHEET 6 LEGEND: PROPOSED: ELLidT SPAWNING CHANNEL WETLAND ----ORDINARY HIGH WATERLINE TEMP. WETLAND -----c-----c— CUT LINE (DAYLIGHT) -- BUFFER IMPACT —' ___r_____�T FILL LINE (DAYLIGHT) LARGE WOODY EXISTING CHANNEL CENTER LINE LOCATION: COUNTY, DEBRIS —PROPOSED CENTERLINE CHANNEL --- — — — WETLAND BUFFER EXISTING RIPRAP FROM: LATITUDE -47°28'10" WETLAND BOUNDARY Q EXISTING LEVEE E '. PROPOSED: ELLidT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING g CHANNEL ADJACENT TO THE CEDAR ' IMPACTS PLAN RIVER DATURA' VERT: NAVD 88 (CORPS) 0 20 LOCATION: COUNTY, HORIZ: NAD 83/91 (CORPS) SI S. . 23 N, Rw5E, W. M. BASIN: CEDAR/SAMMAMISH SCALE I"=2V FROM: LATITUDE -47°28'10" - 122.08'51" ADJACENT PROPERTY OWNERS:LONGITUDE APPLICANT: CITY OF RENTON, WA TO: LATITUDE -47'28'10' CITY OF RENTON d LONGITUDE - 122'09'06" DATE: JULY 2011 SHEET: 7 of 10 y 1 1 1 1 1 1 1 1 W ORDINARY W HIGH WATER LIN `� �� ----- IMF W -� --- W -"-- U ----------------------------- - -------------------- ---- -- Z- --- ---- _ _ ------------------- ---------- r ---- - -- _------- ----^-------------z-------�---- , r - -&4.0 0_ ---- -------------------------------------------c-----�- -- _- ----c ----c -- --c--_--- _ -_ LIMITS OF IMPACT ------------------------------------- ---------------- --------------- --------- 87 ------------------- Q 1 Lij TS OF W kCT 83---------- -- -� W W - --- I - ----------- I �RDINARY HIGH WATER LEGEND: WETLAND ---- ORDINARY HIGH WATER LINE -----e-----e- TEMP. WETLAND CUT LINE (DAYLIGHT) BUFFER IMPACTFILL LINE (DAYLIGHT) LARGE WOODY - EXISTING CHANNEL CENTER UNE DEBRIS -PROPOSED CENTERLINE CHANNEL - - - - WETLAND BUFFER EXISTING RIPRAP - WETLAND BOUNDARY EXISTING LEVEE PURPOSE: TO REPAIR THE EXISTING SPAWNING PROPOSED: ELLIOT SPAWNING CHANNEL CHANNEL ADJACENT TO THE CEDAR RIVER IMPACTS PLAN DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83181 (CORPS) S. 22, T. 23 N. R. 5E, W. M. BABIN: CEDARISAMMAMISH SCALE 1"=20' FROM: LATITUDE -47'28'10" ADJACENT PROPERTY OWNERS: LONGITUDE -122.08'51" CITYCE RENTONTPROPE APPLICANT: CITY OFRENTON,WA TO: LATITUDE -47'28'10" LONGITUDE - 122°09'06" DATE: JULY 2011 SHEET: 8 Of 10 1 1 1 1 1 1 1 1 1 1 1 1 1 i 1 1 1 1 - - ------------ -'- ORDINARY LuW I HIGH WATER J� .,��+ _= I= ------------------�{n --- -- _ _-- - -- _ _ W tfFrflTS OF_-- - , co '` -'t*-' •_- SII - _ _ . -j _-_-- ---- J U _ ---------------------------------- - ------------------------------ : F. _____ '1 .' Lu uj_L__--- = l' " ;, -•'` eco-" >: �.- -� -� - IMITS OF I W IMPACT 1 W -- ---- I i W HIGH WATER ------ J 2 U Q i " LEGEND: R WETLAND ----ORDINARY HIGH WATER LINE -----c-----c– CUT LINE (DAYLIGHT) F TEMP. WETLAND BUFFER IMPACT --- --F-----F–FILL LINE (DAYLIGHT) = LARGE WOODY —'-' ' EXISTING CHANNEL CENTER LINE DEBRIS — – —PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP w w WETLAND BOUNDARY EXISTING LEVEE n PROPOSED: ELLI07 SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER DATUM: VERT: NAVD 8B (CORPS) U 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83/91 (CORPS) S. 22, T. 23 N, R. 5E, W. M. s BASIN: CEDARISAMMAMISH SCALE 1'=20' FROM: LATITUDE -47128110" -122°08'51" ADJACENT PROPERTY OWNERS:LONGITUDE APPLICANT: CITY OF RENTON. WA TO: LATITUDE -47'28'10" CITY OF RENTON LONGITUDE -122°09'08" W DATE: JULY 2011 SHEET: 9 of 10 1 1 1 1 1 1 r �= ------------------ ---------- ---- t _- b , - V g IIS o � , 6 IORDINARYC� WI HIGH WATEP 1 I,IJ I uj 1 uj W 1 �:------- CEDAR RIVER :SE1.ECTNE' REMOVAL OF ,. r _DE3R1S_WffHlN._NEW.^CI4ANNEL NEW BACKWATER CHANNEL - 10--PERMEABLE-TEVEE - - --- - 85 84-------------------------- ��— --------°'- - - rn ""'j - '� / /I'v /. '41 10 ____86 --- - B� ------------- LEGEND: - ----- _, LEGEND: PROPOSED: ELLIOT SPAWNING CHANNEL WETLAND —ORDINARY HIGH WATER LINE TEMP. WETLAND -----c-----c— CUT LINE (DAYLIGHT) BUFFER IMPACT -----F-----r _ FILL LINE (DAYLIGHT) LARGE WOODY EXISTING CHANNEL CENTER LINE LOCATION: KING COUNTY, WASHINGTON DEBRIS PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP yr WETLAND BOUNDARY 0 EXISTING LEVEE ---------- ------------- N ----- ------ N 9 --------------86---------------- 7 ----------- p ERM EABLE JJJ LEVEE REPAIR?' J - ♦ Jr+-___��___-F� 7ti I r ExISTING J I LEVEE I ' '1 /.----------------- -ORDINARY - -----ORDINARY _ 85 HtGK_WATER.^-''^ ---------- PURPOSE: -- -- PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER - DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83!91 (CORPS) S. 22, T. 23 N, R- 5E, W. M. BASIN: CEDAR/SAMMAMISH SCALE I'-20' FROM: LATITUDE -47°28'10" R LONGITUDE - 122'08'51" ADJACENT PROPERTY OWNERS: APPLICANT: CITY OF RENTON, WA TO: LATITUDE -47'28'10" CITY OF RENTON LONGITUDE - 122°09'08" DATE: JULY 2011 SHEET: 10 of 10 1 ATTACHMENT B iWETLAND DETERMINATION DATA FORMS 1 1 1 1 L� 1 1 1 1 1 1 1 1 1 1 1 1 WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, and Coast Region Project/Site; Elliot_Snawning Channel Reconstruction Protect_ CitylCounty: Renton _ __ Sampling Date:04-13-11 Applicant/Owner: City of Renton State: WA Sampling Point: W1 -SP1 Investigator(s): Colin Worslev. Claire Hoffman Section, Township, Range: Sec 22, T23N. R05E Landform (hillslope, terrace, etc.): floodolain Local relief (concave, convex, none): concave Slope (%): 1% Subregion (LRR): A Lat: 47.469678 Long: -122.152423 Datum: NAD 83 Soil Map Unit Name: Riverwash NWI classification: PSSC Are climatic I hydrologic conditions on the site typical for this time of year? Yes ® No ❑ (It no, explain in Remarks.) Are Vegetation Soil or Hydrology significantly disturbed? Are "Normal Circumstances" present? Yes ® No ❑ Are Vegetation Soil or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ® No ❑ Is the Sampled Area Hydric Soil Present? Yes ® No ❑ within a wetland? Yes ® No ❑ Wetland Hydrology Present? Yes ® No ❑ S Q4Yer Remarks: Sample plot is located near the eastern boundary of the wetland, immediately west of the embankment that separates Wetland 1 from the Elliott Spawning Channel. PVC pipe and rebar (old hydrologic well?) located immediately to the east. VEGETATION — Use scientific names of plants. I US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version Absolute Dominant Indicator Dominance Testworksheat: Tree Stratum (Plot size: 30 t) S Q4Yer eci ? Status Number of Dominant Species 1, That Are OBL, FACW, or FAC: 2 (A) 2. Total Number of Dominant 1 Species Across All Strata: 2 (B) 4. Percent of Dominant Species = Total Cover That Are OBL, FACW, or FAC: 100 (AIB) 5aolinalShrub Stratum (Plot size: 10�f ) 1. Salix lucida sso. lasiandra fvouna] 40 YES FACW Prevalence Index worksheet: 2. Total % Cover of: Mpllidy by: 3• OBL species x 1 = 4. FACW species x 2 = 5. FAC species x 3 = 40 = Total Cover FACU species x 4 = Herb �Iratum (Plot size: 2D UPL species x 5 = 1. Phalaris arundinacea 20 YES FACW Column Totals: (A) (B) 2. Rumex obtusifolius 5 NO FAC 3. Ranunculus reoens 2 LO _ FACA Prevalence Index = B1A = 4, Hydrophytic Vegetation Indicators: 5, ® Dominance Testis >50% 6. ❑ Prevalence Index is s3.0' 7, ❑ Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) 8. ❑ Wetland Non -Vascular Plants' 9 ❑ Problematic Hydrophytic Vegetation' (Explain) 10 'Indicators of hydric soil and wetland hydrology must 11 • be present, unless disturbed or problematic. 27 = Total Cover Woody Vine Stratum (Plot size: 1. Hydrophytic 2 Vegetation Present? Yes ® No ❑ = Total Cover % Bare Ground in Herb Stratum U5 Remarks: 100% of the dominant species are FAC or wetter. I US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version SOIL Sampling Point: W1 -SP1 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of Indicators.) Depth Matrix Redox Features Primary Indicators (minimum 91 one Lgauired: chgr� (inches) Color (moist) Color (moist) % Tyne'= Texture Remarks �_ 10YR 412 880 10YR 416 20 C M fine sa loam 5.22 5Y411 70 10YR 4/6 30 C M sand 10YR 412 80 7.5YR 314 20 C PL silt loam Inclusions of this were found ❑ Water Marks (131) ❑ Aquatic Invertebrates (Bi3) in the lower laver (5-22 inches) 'Type: C=Concentration, D=De letion RM=Reduced Matrix, CS=Covered or Coated Sand Grains. Location: PL=Pore Lining, M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Solis : ❑ Histosol (Al) ® Sandy Redox (S5) ❑ 2 cm Muck (At 0) ❑ Histic Epipedon (A2) ❑ Stripped Matrix (S6) ❑ Red Parent Material (TF2) ❑ Black Histic (A3) ❑ Loamy Mucky Mineral (Fl) (except MLRA 1) ❑ Other (Explain in Remarks) ❑ Hydrogen Sulfide (A4) ❑ Loamy Gleyed Matrix (F2) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Depleted Below Dark Surface (At 1) ❑ Depleted Matrix (F3) ❑ Sparsely Vegetated Concave Surface (138) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and ❑ Sandy Mucky Mineral (Si) ❑ Depleted Dark Surface (F7) wetland hydrology must be present, ❑ Sandy Gleyed Matrix (S4) ❑ Redox Depressions (F8) unless disturbed or problematic. Restrictive Layer (if present): Water Table Present? Yes ® No ❑ Depth (inches): 1 in above Type: Saturation Present? Yes ® No ❑ Depth (inches): Wetland Hydrology Present? Yes ® No ❑ Hydric Soil Present? Yes ® No ❑ Remarks: HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum 91 one Lgauired: chgr� all that, aq,Ry) Secondary Indicators (2 or more reauired) ® Surface Water (Al) ❑ Water -Stained leaves (139) (except MLRA ❑ Water -Stained Leaves (69) (MLRA 1, 2, ® High Water Tattle (A2) 1, 2, 4A, and 46) 4A, and 413) ® Saturation (A3) ❑ Salt Crust (1311) ❑ Drainage Patterns (B10) ❑ Water Marks (131) ❑ Aquatic Invertebrates (Bi3) ❑ Dry -Season Water Table (C2) ❑ Sediment Deposits (132) ❑ Hydrogen Sulfide Odor (C1) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Drift Deposits (133) ❑ Oxidized Rhizospheres along Living Roots (C3) ❑ Geomorphic Position (D2) ❑ Algal Mat or Crust (134) ❑ Presence of Reduced Iron (C4) ❑ Shallow Aquitard (133) ❑ Iron Deposits (135) ❑ Recent Iron Reduction in Tilled Soils (C6) ❑ FAC -Neutral Test (135) ❑ Surface Soil Cracks (B6) ❑ Stunted or Stressed Plants (Di) (LRR A) ❑ Raised Ant Mounds (D6) (LRR A) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Other (Explain in Remarks) ❑ Frost -Heave Hummocks (D7) ❑ Sparsely Vegetated Concave Surface (138) Field Observations: Surface Water Present? Yes ® No ❑ Depth (inches): 1 Water Table Present? Yes ® No ❑ Depth (inches): 1 in above Saturation Present? Yes ® No ❑ Depth (inches): surface Wetland Hydrology Present? Yes ® No ❑ includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: Approximately 75 % of the wetland is inundated, with up to 12 inches of surface water. 1 US Army Carps of Engineers Western Mountains, Valleys, and Coast— Interim Version 1 1 1 t t 1 1 1 1 1 1 1 1 WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, and Coast Region Project/Site: Elliot Spawning Channel Reconstruction Project City/County: Renton Sampling DaW04-13-11 Applicant/Owner: City, of Renton State: WA Sampling Point: W1-SP2 Investigator(s): Pglin lftil &ley, Claire Hoffman Section, Township, Range: Sec 22, T23N. R05E Landform (hillslope, terrace, etc.): fioodplain Local relief (concave, convex, none): convex Slope (%): 1% Subregion (LRR): A Lat: 47.469662 Long: -122.152360 Datum: NAD 83 Soil Map Unit Name: Riverwash NWI classification: Are climatic ! hydrologic conditions on the site typical for this time of year? Yes ® No ❑ (If no, explain in Remarks.) Are Vegetation Soil or Hydrology significantly disturbed? Are "Normal Circumstances' present? Yes® No ❑ Are Vegetation Soil or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ® No ❑ Is the Sampled Area Hydric Soil Present? Yes ❑ No ® within a Wetland? Yes ❑ No CD Wetland Hydrology Present? Yes ❑ No Number of Dominant Species Remarks: Sample plot is located east of Wetland 1, on the embankment that separates Wetland 1 from the Elliott Spawning Channel. VEGETATION — Use scientific names of plants. 1 US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version Absolute Dominant Indicator Dominance Test worksheet: Tree Stratum (Plot size: a= Cover Species? Status Number of Dominant Species 1. That Are OBL, FACW, or FAC: 2 (A) 2. Total Number of Dominant 3• Species Across All Strata: 3 (B) 4. Percent of Dominant Species = Total Cover That Are OBL, FACW, or FAC: 67 (A/B) Sapling/Shrub Stratum (Plot size: 14 1. Salix lucida ssp. lasiandra (young) 10 YES FACW Prevalence Index worksheet: 2, Total % Cover of: Multiply by,: 3. OBL species x 1 = 4. FACW species x 2 = 5. FAC species x 3 = 10 = Total Cover FACU species x4= Herb Stratum (Plot size: 2b UPL species X5= I. Phalaris arundinacea 30 YES FACW Column Totals: (A) (S) 2. Polygonumcuspidatum, _ 2QX FAQW 3. Prevalence Index = B/A = 4. Hydrophytic Vegetation Indicators: 5, ® Dominance Testis >50% 6. ❑ Prevalence Index is 53.0' 7. ❑ Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) 8 ❑ Wetland Non -Vascular Plants' 9 ❑ Problematic Hydrophytic Vegetation` (Explain) 10 'Indicators of hydric soil and wetland hydrology must 11. be present, unless disturbed or problematic. 50 _ = Total Cover Woody Vine Stratum {Plot size: 1. Hydrophytic 2 vegetation Present? Yes ® No ❑ = Total Cover % Bare Ground in Herb Stratum 50 Remarks: 1 US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version 1 1 1 1 1 1 1 1 1 1 1 t 1 1 1 1 1 1 SOIL Sampling Point: WI-SP2 Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of indicators.) Depth Matrix _ ____ Redox Features Primary Indicators (minimum of one required: check (inches) Color (moist) % Color (moist) % Tvoe Loc' Texture _ Remarks _ 0-18 5Y 412 100w_ - sand 18-21 10YR 412 100 1, 2, 4A, and 4B) fine so loam 'Type: C=Concentration, D=De letlon, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining. M=Matrix. Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric S0118 : ❑ Histosol (Al) ❑ Sandy Redox (S5) ❑ 2 cm Muck (A10) ❑ Histic Epipedon (A2) ❑ Stripped Matrix (S6) ❑ Red Parent Material (TF2) ❑ Black Histic (A3) ❑ Loamy Mucky Mineral (171) (except MLRA 1) ❑ Other (Explain in Remarks) ❑ Hydrogen Sulfide (A4) ❑ Loamy Gleyed Matrix (F2) ❑ Iron Deposits (BS) ❑ Depleted Below Dark Surface (A11) ❑ Depleted Matrix (F3) ❑ Surface Soil Cracks (B6) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F6) 'Indicators of hydrophytic vegetation and ❑ Sandy Mucky Mineral (Si) ❑ Depleted Dark Surface (F7) wetland hydrology must be present, ❑ Sandy Gleyed Matrix (S4) ❑' Redox Depressions (F8) unless disturbed or problematic. Restrictive Layer (if present): Type: Depth (inches): NA Depth (inches): Water Table Present? Yes ❑ No ® Hydric Soil Present? Yes ❑ No Remarks: Saturation Present? Yes ❑ No ® HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply)_ Secondary indicators (2 or more required) ❑ Surface Water (Al) ❑ Water -Stained Leaves (139) (except MLRA ❑ Water -Stained Leaves (B9) (MLRA 1, 2, ❑ High Water Table (A2) 1, 2, 4A, and 4B) 4A, and 4B) ❑ Saturation (A3) ❑ Salt Crust (B11) ❑ Drainage Patterns (BID) ❑ Water Marks (B1) ❑ Aquatic Invertebrates (B13) ❑ Dry -Season Water Table (C2) © Sediment Deposits (B2) ❑ Hydrogen Sulfide Odor (C1) ❑ Saturation Visible on Aerial Imagery (Cg) ❑ Drift Deposits (133) ❑ Oxidized Rhizospheres along Living Roots (C3) ❑ Geomorphic Position (D2) ❑ Algal Mat or Crust (94) ❑ Presence of Reduced Iron (C4) ❑ Shallow Aquitard (133) ❑ Iron Deposits (BS) ❑ Recent Iron Reduction in Tilled Soils (C6) ❑ FAC -Neutral Test (D5) ❑ Surface Soil Cracks (B6) ❑ Stunted or Stressed Plants (131) (LRR A) ❑ Raised Ant Mounds (06) (LRR A) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Other (Explain in Remarks) ❑ Frost -Heave Hummocks (137) ❑ Sparsely Vegetated Concave Surface (138) Field Observations: Surface Water Present? Yes ❑ No ® Depth (inches): NA Water Table Present? Yes ❑ No ® Depth (inches): NA Saturation Present? Yes ❑ No ® Depth (inches): NA Wetland Hydrology Present? Yes ❑ No includes capillary fringe) Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available: Remarks: 1 US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version 1 fl 1 1 t 1 1 1 1 1 1 1 WETLAND DETERMINATION DATA FORM —Western Mountains, Valleys, and Coast Region Project/Site: Elliot Spawning Channel Reconstruction Project City/County: Renton Sampling Date:04-13-11 Applicant/Owner: City of Renton State: WA Sampling Point: W1-SP3 Investigator(s): Colin Worslev. Claire Hoffman Section, Township, Range: Sec 22. T23N. R05E Landform (hillslope, terrace, etc.): floodplain slope T Local relief (concave, convex, none): concave Slope (%): 22 Subregion (LRR): A Lat: 47.469610 Long: -122.152572 Datum: NAD 83 Soil Map Unit Name: River -wash- _ NWI classification: Are climatic I hydrologic conditions on the site typical for this time of year? Yes ® No ❑ (If no, explain in Remarks.) Are Vegetation , Soil , or Hydrology significantly disturbed? Are "Normal Circumstances" present? Yes ® No ❑ Are Vegetation , Soil , or Hydrology naturally problematic? (If needed, explain any answers in Remarks.) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic Vegetation Present? Yes ❑ No ® Is the Sampled Area Hydric Soil Present? Yes ❑ No ® within a Wetland? Yes ❑ No CD Wetland Hydrology Present? Yes ❑ No of Dominant Species Remarks: Sample plot is located west of Wetland 1, on the embankment that separates Wetland 1 from the Elliott Spawning Channel. VEGETATION — Use scientific names of plants. I US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version Absolute Dominant Indicator Dominance Test worksheet: Tree Stratum (Plot size: 2M % Cover -Species?-StatusNumber of Dominant Species 1. Salix iucida ssp. lasiandra ^_ 25 YES FACW That Are OBL, FACW, or FAC: 2 (A) 2. Total Number of Dominant 3• Species Across All Strata: 4 (B) 4. Percent of Dominant Species 5 = Total Cover That Are OBL, FACW, or FAC: 50 (AIB) Saoling/Shrub Stratum (Plot size: jQ( 1. Rubus spectabilis 25 YES FAC Prevalence Index worksheet: 2. Svmphoricarnos albus , —_ 9 , _ Nom_ FAC 1Q Total % Cover of: Multiply by: 3. OBL species x 1 = 4. FACW species x 2 - 5. FAC species x 3 = 27 = Total Cover FACU species x 4 Herb Stratum (Plot size: IM UPL species X5- 5-1. 1 . Polygonum cuspidatum 220 YES FACU Column Totals: (A) (B) 2. Tolmiea menziesii 2 NO FAC 3. Cardamine oligosoerma �_ N AC Prevalence Index = BIA= 4. Hydrophytic Vegetation Indicators: 5, ❑ Dominance Test is >50% 6. ❑ Prevalence index is s3.0' 7. ❑ Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) 8 ❑ Wetland Non -Vascular Plants' 9 ❑ Problematic Hydrophytic Vegetation' (Explain) 10 `Indicators of hydric soil and wetland hydrology must 11 be present, unless disturbed or problematic. 24 = Total Cover Woody Vine Stratum (Plot size: 10 1. Rybus armeniacus 5 YES FACU Hydrophytic 2 Vegetation Present? Yes ❑ No 5 = Total Cover % Bare Ground in Herb Stratum Remarks: Polygonum cuspidatum is small, not leafed out yet as this is still early in the growing season. I US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SOIL Sampling Point: W1-SP3 Profile Description: (Describe to the depth needed to document the Indicator or confirm the absence of Indicators.) Depth Matrix Redox Features Primary Indicators (minimum of one required: check (inches) Color (moist) 9 Color (moist) Type' ' Texture Remarks 0-8 10YR 412 X00 - - fine sa loam U§ J RYR 412 100 - - - sill !4am 15-20 10YR 412 85 10YR 316 15 C M silt loam 'Type: C=Concentration, D=De letion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. Location: PL=Pore Lining, M=Matrix, Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric S0115 : ❑ Histasol (A1) ❑ Sandy Redox (S5) ❑ 2 cm Muck (A10) ❑ Histic Epipedon (A2) ❑ Stripped Matrix (S6) ❑ Red Parent Material (72) ❑ Black Histic (A3) ❑ Loamy Mucky Mineral (F1) (except MLRA 1) ❑ Other (Explain in Remarks) ❑ Hydrogen Sulfide (A4) ❑ Loamy Gleyed Matrix (F2) ❑ FAC -Neutral Test (135) ❑ Depleted Below Dark Surface (Al 1) ❑ Depleted Matrix (F3). ❑ Raised Ant Mounds (D6) (LRR A) ❑ Thick Dark Surface (Al2) ❑ Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and ❑ Sandy Mucky Mineral (S1) ❑ Depleted Dark Surface (F7) wetland hydrology must be present, ❑ Sandy Gleyed Matrix (S4) ❑ Redox Depressions (F8) unless disturbed or problematic. Restrictive Layer (if present): Surface Water Present? Yes ❑ No ® Depth (inches): NA Type: Water Table Present? Yes ❑ No ® Depth (inches): Hydric Soil Present? Yes ❑ No Remarks: Rocks below 20 inches. Depth (inches): N_A_ Wetland Hydrology Present? Yes ❑ No HYDROLOGY Wetland Hydrology Indicators: Primary Indicators (minimum of one required: check all that apply) Secondary Indicators (2 or more required) ❑ Surface Water (Al) ❑ Water -Stained Leaves (B9) (except MLRA ❑ Water -Stained Leaves (B9) (MLRA 1, 2, ❑ High Water Table (A2) 1, 2, 4A, and 4B) 4A, and 4B) ❑ Saturation (A3) ❑ Salt Crust (B11) ❑ Drainage Patterns (B10) ❑ Water Marks (131) ❑ Aquatic Invertebrates (1313) ❑ Dry -Season Water Table (C2) ❑ Sediment Deposits (62) ❑ Hydrogen Sulfide Odor (C1) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Drift Deposits (133) ❑ Oxidized Rhizospheres along Living Roots (C3) ❑ Geomorphic Position (D2) ❑ Algal Mat or Crust (134) ❑ Presence of Reduced Iron (C4) ❑ Shallow Aquitard (133) ❑ Iron Deposits (B5) ❑ Recent Iran Reduction in Tilled Soils (C6) ❑ FAC -Neutral Test (135) ❑ Surface Soil Cracks (136) ❑ Stunted or Stressed Plants (131) (LRR A) ❑ Raised Ant Mounds (D6) (LRR A) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Other (Explain in Remarks) ❑ Frost -Heave Hummocks (137) ❑ Sparsely Vegetated Concave Surface (B8) Field Observations: Surface Water Present? Yes ❑ No ® Depth (inches): NA Water Table Present? Yes ❑ No ® Depth (inches): NA Saturation Present? Yes ❑ No ® Depth (inches): N_A_ Wetland Hydrology Present? Yes ❑ No includes ca Illa Erin e Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), if available: Remarks: 1 US Army Corps of Engineers Western Mountains, Valleys, and Coast — Interim Version 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 n 1 1 ATTACHMENT C WETLAND RATING FORM 1 1 1 1 Wetland name or number 1 WETLAND RATING FORM — WESTERN WASHINGTON Version 2 — Updated July 2006 to increase accuracy and reproducibility among users Updated Oct. 2008 with the new WDFW definitions for priority habitats Name of wetland (if known): I Date of site visit: 4/13/11 Rated by: C. Worsley, M Maynard Trained by Ecology? Yes X No Date of training: 11/2005: 04/2006 SEC: 22 TWNSHP: 23N RNGE: 05E Is S/T1R in Appendix D? Yes No X— Map of wetland unit: Figure Estimated size: 0.03 acre SUMMARY OF RATING Category based on FUNCTIONS provided by wetland: I II X III IV, Category 1 = Score > 70 Category 11 = Score 51 - 69 Category III = Score 30 — 50 Category IV = Score < 30 Score for Water Quality Functions Score for Hydrologic Functions Score for Habitat Functions 1 Category based on SPECIAL CHARACTERISTICS of Wetland 1 1 1 1 J TOTAL Score for Functions 16 10 15 41 I H Does not apply X Final Category (choose the "highest" category from above") II Summary of basic information about the wetland unit. Wetiand Unit has Special Characteristics Estuarine Natural Heritage Wetland Bo Mature Forest Old Growth Forest Coastal Lagoon Interdunal None of the above Wetland HGM Class used for Rating De sessional Riverine X Lake -fringe Slope Flats Freshwater Tidal Check if unit has multiple HGM classes present Does the wetland being rated meet any of the criteria below? If you answer YES to any of the questions below you will need to nrotect the wetland according to the regulations regarding the snecial characteristics found in the wetland. Check List for Wetlands that Need Additional Protection YES NO in addition to the protection recommended for its category) SP1. Has the wetland unit been documented as a habitat for any Federally listed Threatened or Endangered animal or plant species (TIE species)? For the purposes of this rating system, "documented" means the wetland is on the appropriate X state or federal database. SP2. Has the wetland unit been documented as habitat for any State listed Threatened or X Endangered animal species? For the purposes of this rating system, "documented" means the wetland is on the appropriate state database. Note: Wetlands with State listed plant species are categorized as Category 1 Natural Heritage Wetlands see p. 19 of data form). SP3. Does the wetland unit contain individuals of Priority species listed by the H'DFfV or the state? X SP4. Does the welland unit have a local significance in addition to its functions? For example, the X wetland has been identified in the Shoreline Master Program, the Critical Areas Ordinance, or in a local management plan as having special significance. To complete the next art of the, ,d{ata sheet you will need to determine the Hydroe�rphic Class of the wetland beim rated. The tic classification ems%wdarxis in to those that function in sirnilar ways. This simplifies the questions needed to answer how well the wetland functions. The Hydrogeornotphic Class of a wetland can be determined using the key below. Seep. 24 for mote detailed instructions on classifying wetlands. Wetland Rating Form — Western Washington, Version 2 (7/06), updated with new WDFW definitions Oct. 2008 Page I of 12 1 1 1 1 1 1 1 1 1 1 1 Wetland name or number Classification of Vegetated Wetlands for Western Washington Itt the hydrologic criteria listed to each question do not apply to the entire unit being rated, you probably have a unit with multiale HGM classes. In this case. identifv which hvdroloeic criteria in auestions 1-7 anoly. and ao to Ouestion 8. 1. Are the water levels in the entire unit usually controlled by tides (i.e. except during floods)? NO — go to 2 YES — the wetland class is Tidal Fringe If yes, is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)? YES — Freshwater Tidal Fringe NO — Saltwater Tidal Fringe (Estuarine) If your wetland can be classified as a Freshwater 771dal Fringe use the forms for Riverine wetlands. If it is a Saltwater Tidal Fringe it is rated as on Estuarine wetland Wetlands that were call estuarine in the first and second editions of the rating system are called Salt Water Tidal Fringe in the Hydrogeomorphic Classification. Estuarine wetlands were categorized separately in the earlier editions, and this separation is being kept in this revision. To maintain consistency between editions, the term "Estuarine" wetland is kept. Please note, however, that the characteristics that define Category I and II estuarine wetlands have changed (see p. _ ). 2. The entire wetland unit is flat and precipitation is only source (>90%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. NO o otg 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 meet both of the following criteria? The vegetated part of the wetland is on the shores of a body of permanent open water (without any vegetation on the surface) where at least 20 acres (8ha) in size; At least 30% of the open water area is deeper than 6.6 (2 m)? NO — go to 4 YES — The wetland class is Lake -fringe (Lacustrine Fringe) 4. Does the entire wetland meet all of the following criteria? The wetland is on a slope (slope can be very gradual). 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. The water leaves the wetland without being impounded? NOTE: Surface water does not pond in these types of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 foot deep). NO — go to 5 YES — The wetland class is Slope 5. Does the entire wetland meet all of the following criteria? The unit is in a valley or stream channel where it gets inundated by overbank flooding from that stream or river. The overbank flooding occurs at least once every two years. NOTE: The riverine unit can contain depressions that are f lied with water when the river is notllooding.. NO -- go to 6 YES — The wetland class is Riverine 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at some time of the year. This means that any outlet, if present is higher than the interior of the wetland. NO -- go to 7 YES — The wetland class is Depressional 7. Is the entire wetland 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. No — go to 8 YES -- The wetland class is Depressional 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 dverine floodplain, or a small stream within a depression] 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 your wetland. 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 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. IIGAI Classes within the wetland unit being rated HGh1 Class to Use in Rating— Slo e + Riverine Riverine Slope + Depressional Depressional Slope + Lake -fringe Lake -fringe Depressional + Riverine along stream within boundary De ressional Depressional + Lake -fringe Depressional Salt Water Tidal Fringe and any other class of freshwater wetland Treat as ESTUARINE under wetlands with special characteristics If you are unable still to determine which of the above criteria apply to your wetland, or you have more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the rating. Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 Page 2 of 12 1 1 1 1 t t t t 1 II 1 IJ Wetland name or number D Depressionpl andFlat WV.11 ds _ Points WATER QUALITY FUNCTIONS — Indicators that wetland functions to improve water quality. (only t score per box) D 1 Does the wetland have the notential to improve water quality? (see p. 38) D 1.1 Characteristics of surface water flows out of the wetland: • Unit is a depression with no surface water leaving it (no outlet) ........................................... points _ 3 Figure • Unit has an intermittently flowing, OR highly constricted, permanently flowing outlet ........ points = 2 • Unit has an unconstricted, or slightly constricted, surface outlet (permanently flowing) ....... points = 1 • Unit is a "flat" depression (Q.7 on key), or in the Flats class, with permanent surface outflow and no obvious natural outlet and/or outlet is a man-made ditch ........................... points= 1 ff ditch is not permanenilv.owijgtreat unit as "intermittently flowing " Provide Rhota or drawing D 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (rose NRCSdefrnitions) YES points= 4 NO Roints = 0 D 1.3 Characteristics of persistent vegetation (emergent, shrub, and/or forest Cowardin class): • Wetland has persistent, ungrazed vegetation > = 95% of area ............................................... points = 5 Figure • Wetland has persistent, ungrazed vegetation > = 112 of area ................................................. points = 3 • Wetland has persistent, ungrazed vegetation > = 1/10 of area ............................................... points = 1 • Wetland has persistent, ungrazed vegetation < 1/10 of area .................................................. points = 0 Map of Cowardin vegetation classes Characteristics of seasonal ponding or inundation: Tis is the area of the welland that is pone or at least 2 months, but dries out sometime during the year. Do not count the area that is permanently Figure _ ponded. Estimate area as the average condition 5 out of 10 years. • Area seasonally ponded is > 112 total area of wetland.......................................................... points = 4 • Area seasonally ponded is > 114 total area of wetland.......................................................... points = 2 • Area seasonally ponded is < 114 total area of wetland.......................................................... points = 0 -Map of H dra eriods Total for D 1 Add the points in the boxes above D 2 Does the wetland have the opportunity to improve water quality? (seep. 44) Answer YES if you know or believe there are pollutants in groundwater or surface water coming into the wetland that would otherwise reduce water quality in streams, lakes or groundwater downgradient from the wetland? Note which of the following conditions provide the sources of pollutants. A unit mqv have pollutants coming from several sources, but anv single source would qualify as opportunity. X Grazing in the wetland or within 150 ft Untreated stormwater discharges to wetland Tilled fields or orchards within 150 ft. of wetland A stream or culvert discharges into wetland that drains developed areas, residential areas, farmed fields, roads, or clear-cut logging Residential, urban areas, golf courses are within 150 ft. of wetland Multiplier Wetland is fed by groundwater high in phosphorus or nitrogen Other YES multi tier is 2 No multiplier is I ♦ TOTAL -- Water Quality Functions Multiply the score from D1 by 112; then add score to table on p. 1 HYDROLOGIC FUNCTIONS — Indicators that wetland unit functions to reduce flooding and stream degradation. D 3 Does the wetland have the notential to reduce flooding and erasion? (.see p. 46) D 3.1 Characteristics of surface water flows out of the wetland unit • Unit is a depression with no surface water leaving it (no outlet) ........................................... points = 4 • Unit has an intermittently flowing, OR highly constricted permanently flowing outlet ......... points = 2 Unit is a "flat" depression (Q.7 on key) or in the Flats class, with permanent surface outflow and no obvious natural outlet and/or outlet is a man-made ditch ........................... points= 1 (if ditch is not permanently flowing treat unit as "intermittently flowing ) • Unit has an unconstricted, or slightly constricted surface outlet ermanently owin .. oints = 0 D 3.2 Depth of storage during wet periods. Estimate the height of ponding above the bottom of the outlet, For units with no outlet measure from the surface of permanent water or deepest part (if dry). • Marks of ponding are 3 ft. or more above the surface or bottom of the outlet ....................... points = 7 • The wetland is a "headwater" wetland.................................................................................. points = 5 • 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 ■ Wetland is flat (yes to Q.2 or Q.7 on key)but has small depressions on the surface that trap water points = 1 • Marks of pondin& less than 0.5 ft......................................................................................... points = 0 D 3.3 Contribution of -wetland unit to storage tot 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. • The area of the basin is less than 10 times the area of 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 .......................................... ppmts= 0 Entire unit is in the FLATS class......................................................................................... P0ints = Total for D 3 Add the points in the boxes above 1 Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 Page 3 of 12 1 Wetland name or number ] 1 t 1 1 1 1 1 1 1 1 1 1 1 1 D 4 Does the wetland have the onnortunity to reduce [boding and erosion? (seC74 7) Answer YES if the unit is in a location in the watershed where the flood storage, or reduction in water velocity, it provides helps protect downstream property and aquatic resources from flooding or excessive and/or erosive flows. Answer NO if the water coming into the wetland is controlled by a structure such as flood gate, tide gate, flap valve, reservoir etc. OR you estimate that more than 40% of the water in the wetland is from groundwater in areas where damaging groundwater flooding does not occur. Note which of the following indicators of opportunity appJi� Wetland is in a headwater of a river or stream that has flooding problems. Wetland drains to a river or stream that has flooding problems Wetland has no outlet and impounds surface runoff water that might otherwise flow into a river or Multiplier stream that has flooding problems Other YES multiplier is 2 No multiplier is 1 ♦ TOTAL —Hydrologic Functions Multiply the score from D3 _by D4; then add score to table onp. 1 I Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 rage 4 of 12 1 1 1 1 1 1 1 1 1 1 Wetland name or number R Riverine wnd Freshwpter Tidal Fringe Wetlands _ Points WA,rER QUALI'T'Y FUNCTIONS — Indicators that wetland functions to improve water quality. (only 11 score per box) R 1 Does the wetland have the E,otential to improve water quality? (see p,52) R 1.1 Area of surface depressions within the riverine wetland that can trap sediments during a flooding event: ................................................... • Depressions cover > 314 area of wetland ...................... ..... points = 8 Figure • Depressions cover > 1/2 area of wetland.............................................................................. points = 4 (if depressions > 1/2 of area of unit draw polygons on aerial photo or map) • Depressions present but cover < 112 area of wetland............................................................ points = 2 8 e No de ressions 2resent ........................................................................................................ points = 0 R 1.2 Characteristics of the vegetation in the unit (areas with >90% cover at person height): Figure • Trees or shrubs > 213 area of the unit........... points = 8 ........................................................................ • Trees or shrubs > 113 area of the wetland............................................................................. points = 6 • Ungrazed, herbaceous plants > 213 area of unit.................................................................... points = 6 • Ungrazed herbaceous plants > 113 area of unit..................................................................... points = 3 0 • Trees, shrubs, and ungrazed herbaceous < 113 area of unit ................................................... points = 0 Aerial photo or map showing polygons of different ve etatian types Add the points in the boxes above 8 R 2 Does the wetland have the opportunity to improve water quality? (seep. 53) Answer YES if you know or believe there are pollutants in groundwater or surface water coming into the wetland that would otherwise reduce water quality in streams, lakes or groundwater downgradient from the wetland. Note which of the following conditions provide the sources of pollutants. A unit may have pollutants comingfrom several sources, but any single source would qualify as opportunity. Grazing in the wetland or within 150 ft Untreated stormwater discharges to wetland X Tilled fields or orchards within 150 ft. of wetland A stream or culvert discharges into wetland that drains developed areas, residential areas, farmed fields, roads, or clear-cut togging Residential, urban areas,golf courses are within 150 ft. of wetland The river or stream linked to the wetland has a contributing basin where human activities have Multiplier raised levels of sediment, toxic compounds or nutrients in the river water above standards for water quality. Other 2 YES multiplier is 2 NO multiplier is 1 ♦ TOTAL— Water Quality Functions Multiply the score from R by R2; then add score to table on p. 1 F1.6 HYDROLOGIC FUNCTIONS — Indicators that wetland functions to reduce flooding and stream erosion. R 3 Does the wetland have the potential to reduce flooding and erosion? (see p. 54) R 3.1 Characteristics of the overbank storage the wetland provides: Estimate the average width of the wetland perpendicular to the direction of the flow and the width of the stream or river channel (distance between Figure banks). Calculate the ratio: (average width of unit) / (average width of stream between banks). • If the ratio is more than 20................................................................................................... points = 9 • If the ratio is between 10 — 20.............................................................................................. points = 6 • If the ratio is 5-<10............................................................................................................. points = 4 • If the ratio is 1-<5............................................................................................................... points = 2 I • If the ratio is < l.................................................................................................................. points = ! Aerial photo or map showing average widths R 3.2 Characteristics of vegetation that slow down water velocities during floods: Treat large woody debris as `forest or shrub ". Choose the points appropriate for the best description. (polygons need to have >90% Figure_ cover at person height NOT Cowardin classes): • Forest or shrub for > 1/3 area OR herbaceous plants > 2/3 area ............................................ points = 7 • Forest or shrub for > 1/] 0 area OR herbaceous plants > 1/3 area .......................................... points = 4 • Vegetation does not meet above criteria ............................................................................... ..................................points = 4 Aerial photo or map showing polygons of different vegeta ion types Add the points in the boxes above _ 5 R 4 Does the wetland have the opportunity to reduce flooding and erosion? (see p.57) Answer YES if the wetland is in a location in the watershed where the flood storage, or reduction in water velocity, it provides helps protect downstream property and aquatic resources from flooding or excessive and/or erosive flows. Note which of the following conditions apply. X There are human structures and activities downstream (roads, buildings, bridges, farms) that can be damaged by flooding. X There are natural resources downstream (e.g. salmon redds) that can be damaged by flooding _ Other Multiplier (Answer NO if the major source of water to the welland is controlled by a reservoir or the wetland is 2 tidal fringe along the sides of a dike) YES multiplier is 2 No multiplier is I ♦ TOTAL —Hydrologic Functions Multiply the score from R3 by R4; then add score to table on p. 1 10 1 Comments: Wetland Rating Form — Western Washington, Version 2 (7/06), updated with new WDFW definitions Oct. 2008 Page 5 of 12 1 t 1 1 1 Wetland name or number I� LakenfrinRe Wetlands _ _ Points WATER QUALITY FUNCTIONS — Indicators that the wetland unit functions to improve water ualit . (only I scar L 1 Does the wetland unit have the potential to improve water quality? (see p.59) per box) L 1.1 Average width of vegetation along the lakeshore (use polygons of Cowardin classes): Figure Fi • Vegetation is more than 33 ft. (10m) wide........................................................................... points = 6 g • Vegetation is more than 16 ft.(5m) wide and < 33 ft............................................................ points = 3 • Vegetation is more than 6 ft. (2m) wide and < 16 ft............................................................. points = 1 • Vegetation is less than 6 ft. wide ........................ g.................................................................. points _ Map of Cowardin classes with widths marked L 1.2 Characteristics of the vegetation in the wetland: Choose the appropriate description that results in the highest points, and do not include any open water in your estimate of coverage. The herbaceous plants can be either the Figure dominant form or as an undersiory in a shrub or forest community. These are not Cowardin classes, Area of Cover is total cover in the unit, but it can be in patches. NOTE: Herbaceous does not include aquatic bed • Cover of herbaceous plants is > 90% of the vegetated area ................................................... points = 6 • Cover of herbaceous plants is > 2/3 of the vegetated area ..................................................... points = 4 • Cover of herbaceous plants is > 1/3 of the vegetated area ..................................................... points = 3 • Other vegetation that is not aquatic bed or herbaceous covers > 213 of the unit .................... points = 3 • Other vegetation that is not aquatic bed in > 1/3 vegetated area ........................................... points= 1 . Aquatic bed cover and open water > 2/3 of the unit.............................................................. points = 0 Map with polygons of different vegetation t es Add the points in the boxes above L 2 Does the wetland have the ogeortuniU to improve water quality? (see p. 61) Answer YES if you know or believe there are pollutants in the lake water, or polluted surface water flowing through the unit to the lake. Note which of the following conditions provide the sources ofpollutanis. A unit may have pollutants coming from several sources, but any single source would qualms as opportunity. Wetland is along the shores of a lake or reservoir that does not meet water quality standards Grazing in the wetland or within 150 ft Polluted water discharges to wetland along upland edge Tilled fields or orchards within 150 ft. of wetland Residential or urban areas are within 150 ft.'of wetland Multiplier Parks with grassy areas that are maintained, ball fields, golf courses (all within 150 ft. of lake shore) Power boats with gasoline or diesel engines use the lake Other YES multiplier is 2 NO multiplier is 1 ♦ TOTAL — Water Quality Functions Multiply the score from L1 by L2; then add score to table on p. 1 HYDROLOGIC FUNCTIONS -- Indicators that wetland functions to reduce shoreline erosion. L 3 Does the wetland have the potential to reduce shoreline erosion? (see p. 62) L 3 Average width and characteristics of vegetation along the lakeshore (do not include aquatic bed): (choose the highest scoring description that matches conditions in the wetland) Figure • 314 of distance is shrubs or forest at least 33 ft. (1 Om) wide ................................................. points = 6 • 3/4 of distance is shrubs or forest at least 6 ft. (2m) wide ..................................................... points = 4 • 1/4 of distance is shrubs or forest at least 33 ft. (10m) wide— ............................................... points = 4 .............. • Vegetation is at least 6 ft. (2m) wide (any type except aquatic bed) ...................................... points = 2 • Vegetation is less than 6 ft. (2m) wide (any type except aquatic bed) ................................... points = 0 Aerial photoor map with Cowardin vegetation classes Record the points in the boxes above L 4 Does the wetland have the opportunity to reduce erosion? (see p. 64) Are there features along the shore that will he impacted if the shoreline erodes? Note which of the following conditions apply. There are human structures and activities along the upland edge of the wetland (buildings, fields) that can be damaged by erosion. Multiplier There are undisturbed natural resources along the upland edge of the wetland (e.g. mature forests, other wetlands) that can be damaged by shoreline erosion. Other YES multiplier is 2 NO multiplier is 1 ♦ TOTAL — Hydrologic Functions MultiplZ the score from L3 by L4; then add score to table on p. 1 I Comments: 1 1 Wetland Rating Form — Western Washington, Version 2 (7/06), updated with new WDFW definitions Oct. 2008 Page 6 of 12 1 Wetland name or number 1 1 1 1 1 1 1 1. -Slope Wetlands Points WATER QUALITY FUNCTIONS — Indicators that wetland functions to improve water quality. (only t scare S ] Does the wetland have tate potential to improve water quality? per box )' see ox) S 1.1 Characteristics of average slope of unit: • Slope is I% or less (a 1% slope has I ft vertical drop in elevationforevery 100f horeontal distance)......... points = 3 • Slope is 1% - 2%................................................................................................................. points = 2 • Slope is 2% - 5%................................................................................................................. points = 1 • Slope is greater than 5% _ ...................................................................................................... Dints 0 S1.2 The soil 2 inches below the surface (or duff layer) is clay, organic (Use NRCS definitions). YES = 3 points NO = D points S 1.3 Characteristics of the vegetation in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the vegetation in the welland Dense vegetation means you Figure have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 inches. • Dense, uncut, herbaceous vegetation > 90% of the wetland area ........................................... points = 6 • Dense, uncut, herbaceous vegetation > 1/2 of area............................................................... points = 3 • Dense, woody, vegetation > 112 of area................................................................................ points = 2 • Dense, uncut, herbaceous vegetation > 1/4 of area............................................................... points = 1 • Does not meet any of the criteria above for vegetation......................................................... points = 0 Aerial photo or map with ve etation polygons Total for S 1 Add the points in the boxes above sssr� i S2 Does the wetland have the opportunity to improve water quality? (see p. 67) Answer YES if you know or believe there are pollutants in groundwater or surface water coming into the wetland that would otherwise reduce water quality in streams, lakes or groundwater downgradient from the wetland? Note which of the following conditions provide the sources of pollulants. A unit may have pollutants coming from several sources, but any single source would qualify as opportunity. Grazing in the wetland or within 150 ft Untreated stormwater discharges to wetland Multiplier Tilled fields, logging, or orchards within 150 ft. of wetland Residential, urban areas, or golf courses are within 150 ft. upslope of wetland Other YES multiplier is 2 NO multiplier is I ♦ TOTAL — Water Quality Functions Multiply the score from SI by S2; then add scare to table an p. I HYDROLOGIC FUNCTIONS — Indicators that wetland functions to reduce flooding and stream erosion. S3 Does the wetland have the potential to reduce flooding and stream erosion? (see p. 68) S3.1 Characteristics of vegetation that reduce the velocity of surface flows during storms: Choose the points appropriate for the description that best fts conditions in the wetland (stems of plants should be thick enough (usually > 1/8in), or dense enough to remain erect during surface flows). • Dense, uncut, rigid vegetation covers > 90% of the area of the wetland ............................... points = 6 • Dense, uncut, rigid vegetation> 112 area of wetland............................................................. points = 3 . Dense, uncut, rigid vegetation > 114 area .................. — • More than I/4 of area is grazed, mowed tilled or vegetation is not rigid ............................. points = 0 S3.2 Characteristics of slope wetland that holds back small amounts of flood flows. The slope has small surface depressions that can retain water over at least 10% of its area. YES = 2 points NO = 0 points Add the in the boxes above coints i i i 1 S4 Does the wetland have the opportunity to reduce flooding and erosion? (seep. 70) Is the wetland in a landscape position where the reduction in water velocity it provides helps protect downstream property and aquatic resources from flooding or excessive and/or erosive flows? Note which of the following conditions apply. _ Wetland has surface runoff that drains to a river or stream that has flooding problems Multiplier Other (Answer NO if the major source of water is controlled by a reservoir (e.g. wetland is a seep 1 at is on the downstream side of a dam) YES multiplier is 2 NO multiplier is I ♦ TOTAL —Hydrologic Functions Multiply the score from S3 by S4; then add score to fable on p. 1 1 Comments: I Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 Page 7 of 12 1 Wetland name or number 1 Li t 1 t 1 Theseoes�1w,ply 11grrrl a!�#HGM�Ias�s Points HAMrA'r FUNCTIONS — Indicators that wetland functions to provide important habitat. (only t Scor per box) H I Does the wetland have the potential to provide habitat for many species? H 1.1 Vefietation structure (see P. 72); Figure Check the types of vegetation classes present (as defined by Cowardin) — Size threshold for each class is 1/4 acre or more than 10% of the area if unit is smaller than 2.5 acres. Aquatic Bed Emergent plants X Scrub/shrub (areas where shrubs have > 30% cover) Forested (areas where trees have > 30% cover) 1 the unit has a foresled class check if: 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. Add the number of vegetation types that qualify. !f you have: Map of Cowardin vegetation classes = 4 structures or more....... points 4 3 structures ................... points= 2 0 2 structures .................... points = l 1 structure .................... points = 0 H 1.2 I-Ivdroperiods (seep. 73): Figure Check the types of waler regimes (hvdroperiods) present within the welland. The water regime has to cover more than 10% of the wetland or 1/4 acre to count (see text for descriptions of hvdroperiods). Permanently flooded or inundated 4 or more types present points = 3 X Seasonally flooded or inundated 3 or more types present...... points = 2 Occasionally flooded or inundated 2 types present ...................points = Saturated only I type present .................... points = 0 X Permanently flowing stream or river in, or adjacent to, the wetland T Seasonally flowing stream in, or adjacent to, the wetland 1 Lake -fringe wetland ................. = 2 points Freshwater tidal wetland......... = 2 points Map of hydroperiods H 1.3 Richness of Plant Species (seep. 75): Count the number of plant species in the wetland that cover at least 10 ft2 (different patches of the same species can be combined 10 meet the size threshold) You do not have to name the species. Do not include Eurasian Milfoil, reed canarygrass, purple looseslrife, Canadian Thistle. If you counted: > 19 species ...................... points = 2 5 — 19 species .................... points = I List species below if you want to: < 5 species ........................ points = 0 H 1.4 Interspersion of Habitats (see p. 76): Decided from the diagrams below whether interspersion between Cowardin vegetation (described in H1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, medium, low, or none. Note: If you have 4 or more classes or 3 vegetation classes and TR) Figure _ open water, the rating is 'Moderate None 0 points Low= l point = 2 points always "high". +,. ti;,, -'�'• �';.,, -. .�:,,; Use map of Cowardin classes C. \ lrlpanan banded chmmetsl Hih3 mints H 1.5 Special HabitgJ Featgres (seep, 77): Check the habital.features that are present in the wetland. The number of checks is the number of point you put into the next column. Large, downed, woody debris within the wetland (> 4 in, diameter and 6 ft. long) Standing snags (diameter at the bottom > 4 inches) in the wetland Undercut banks are present for at least 6.6 ft. (2m) and/or overhanging vegetation extends at least 3.3 ft. (I m) over a stream (or ditch) in, or contiguous with the unit, for at least 33 ft. (I Om) 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 turned grey/brown§ At feast 114 acre of thin -stemmed persistent vegetation or woody branches are present in areas that are permanently or seasonally inundated (structures for egg -laving by amphibians) _ Invasive plants cover less than 25% of the wetland area in each stratum of plants 0 NOTE: The 20% stated in early printings of the manual on page 78 is an error. H 1 TOTAL Score —potential forproviding habitat Add the points in the column above 2 1 Wetland Rating Form — Western Washington, Version 2 (7/06), updated with new WDFW definitions Oct. 2008 Page 8 of 12 1 Wetland name or number 1 t t 1 1 t 1 1 PI! H 2 Does the wetland have the ogportunity to provide habitat for many species? (only 1 scar per box H 2.1 Buffers (see P. 80): Choose the description that best represents condition of buffer of wetland unit. The highest scoring Figure criterion that applies to the wetland is to be used in the rating. See text for definition of "undisturbed". 100m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water > 95% of circumference. No structures are within the undisturbed part of buffer (relatively undisturbed also means no grazing, no landscaping, no daily human use) ............. points = 5 X I 00 (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water > 50% circumference.................................................................................................... points = 4 50m (170 ft) of relatively undisturbed vegetated areas, rocky areas, or open water > 95% circumference ............... _ ..................................................................................... points 4 100m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water > 25% circumference ............. ....................................................................................... points — 50m (170 ft) of relatively undisturbed vegetated areas, rocky areas, or open water for > 50% circumference.............................................................................................. points = 3 If buffer does not meet any of the criteria above: No paved areas (except paved trails) or buildings within 25m (80 ft) of wetland > 95% circumference. Light to moderate grazing or lawns are OK .................................. points = 2 No paved areas of buildings within 50m of wetland for > 50% circum f'erence. Light to moderate grazing or lawns are OK................................................................... points = 2 Heavy grazing in buffer................................................................................................ points = I Vegetated buffers are < 2m wide (6.6 ft) for more than 95% circumference (e.g. tilled fields, paving, basalt bedrock extend to edge of wetland) ............................. points = 0 4 Buffer does not meet any of the criteria above.............................................................. points = 1 Arial photo showing buffers H 2.2 Corridors and Connections (seep. 81) H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor (either riparian or upland) that is at least 150 ft. wide, has at least a 30% cover of shrubs, forest or native undisturbed prairie, that connects to estuaries, other wetlands or undisturbed uplands that are at least 250 acres in size? (Dams in riparian corridors, heavily used gravel roads, paved roads, are considered breaks in the corridor). YES = 4 points (go to H 2.3) NO = go to H 2.2.2 1i. 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor (either riparian 2 or upland) that is at least 50 ft. wide, has at least 30% cover of shrubs or forest, and connects to estuaries, other wetlands or undisturbed uplands that are at least 25 acres in size? OR a Lake - fringe wetland, if it does not have an undisturbed corridor as in the question above? YES = 2 points (go to 1-12.3) NO = go to 1-12.2.3 1.1, 2.2.3 Is the wetland: • Within 5 mi (8km) of a brackish or salt water estuary OR • Within 3 miles of a large field or pasture (> 40 acres) OR YES= 1 point • Within I mile of a lake greater than 20 acres? NO = 0 points Comments: Wetland Rating Form — Western Washington, Version 2 (7/06), updated with new WDFW definitions Oct. 2008 Page 9 of 12 IWetland name or number t 1 t 1 1 1 1 Comments: 1 1 I Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2009 Page 10 of 12 H 2.3 Near or adiacent to other priority habitats listed by WDFW (see p. 82): (see new, and complete descriptions of WDFW priority habitats, and the counties in which they can be found, in the PIE report hip: /Av&f ,. wa.gov/hahlphslist. him ) Which of the following priority habitats are within 330 ft. (104m) of the wetland unit? NOTE: the connections do not have to be relatively undisturbed. Aspen Stands: Pure or mixed stands of aspen greater than 0.4 ha (I acre). 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 p. 152). _ Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock. 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 20 trees/ha (8 trees/acre) > 81 em (32 in) dbh or > 200 years of age. (Mature forests) Stands with average diameters exceeding 53 cm (21 in) dbh; crown cover may be less that 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. Oregon white Oak: Woodlands Stands of pure oak or oak/conifer associations where canopy coverage of the oak component is important (full descriptions in WDFIh PHS report p. 158). X 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 PIIS report p. 161). 4 X 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 relalively undisturbed are in WDFIV report: pp. 167-169 and glossary in Appendix A). 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. Cliffs: Greater than 7.6 m (25 fl) high and occurring below 5000 ft. Talus: Homogenous areas of rock rubble ranging in average size 0.15 - 2.0 m (0.5 - 6.5 fl), composed of basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs. X 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> 51 cm (20 in) in western Washington and are > 2 m (6.5 ft) in height. Priority logs are> 30 cm (12 in) in diameter at the largest end, and > 6 m (20 ft) long. if wetland has 3 or more priority habitats = 4 points If wetland has 2 priority habitats =3 points If wetland has 1 priority habitat = 1 point No habitats = 0 points Note: All vegetated wetlands are by definition a priority habitat but are not included in this list. Nearby wetlands are addressed in question H 2.4 H2.4 Wetland Landscape: Choose the one description of the landscape around the wetland thal best fits (seep. 84) • There are at least 3 other wetlands within 112 mile, and the connections between them are relatively undisturbed (light grazing between wetlands OK, as is lake shore with some boating, but connections should NOT be bisected by paved roads, fill, fields, or other development .......... points = 5 • The wetland is Lake -fringe on a lake with little disturbance and there are 3 other lake -fringe wetlands within I/2 mile.....................................................................................................paints = 5 • There are at least 3 other wetlands within 1/2 mile, BUT the connections between them are 3 disturbed.............................................................................................................................points = 3 • The wetland fringe on a lake with disturbance and there are 3 other lake -fringe wetlands within112 mile....................................................................................................................points = 3 • There is at least 1 wetland within 1/2 mile.. ......................................................................... points _ • There are no wetlands within 1/2 mile.................................................................................. points = 0 H 2 TOTAL Score — opportunity for providing habitat Add the scores from H2.1, H2.2, H2.3, 112.4 13 TOTAL for H 1 from page 8 2 _1 ♦ Total Score for Habitat Functions Add the points for H 1 and H 2; then record the result on p. 1 _ 15_ Comments: 1 1 I Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2009 Page 10 of 12 1 t L 1 1 1 1 1 Wetland name or number CATEGORIZATION BASED ON SPECIAL. CHARACTERISTICS Please determine if the wetland meets the attributes described below and circle the appropriate answers and Category. Wetland Type —Cheek off any criteria that apply to the wetland. Circle lite Category when the appropriate criteria are met, SCl Estuarine wetlands? (see p.86) Does the wetland unit meet the following criteria for Estuarine wetlands? 'rhe dominant water regime is tidal, Vegetated, and With a salinity greater than 0.5 ppl. YES = Go to SC 1.1 NO X SC 1.1 Is the wetland unit within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural Area Preserve, State Park or Educational, Environmental, or Scientific Reserve designated under WAC Cat. 1 332-30-151? YES = Category 1 NO = go to SC 1.2 SC 1.2 Is the wetland at least 1 acre in size and meets at least two of the following conditions? YES = Category 1 NO = Category 11 Cat. The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing, and has -the less than 10% cover of non-native plant species. It non-native Spartina spy,. are only species Cat. II that cover more than 10% of the wetland, then the wetland should be given a dual rating (1111), The area of Spartina would be rated a Category 11 while the relatively undisturbed upper marsh with native species would be a Category I. Do not, however, exclude the area of Spartina in determining the size threshold of I acre. Dual At least 314 of the landward edge of the wetland has a 100 ft. buffer of shrub, forest, or un -grazed Rating or un -mowed grassland I/II The wetland has at least 2 of the following features: tidal channels, depressions with open water, or contiguous freshwater wetlands. SC2 Natural Heritage Wetlands (seep. 87) Natural Heritage wetlands have been identified by the Washington Natural Heritage Program/DNR as either high quality undisturbed wetlands or wetlands that support state Threatened, Endangered, or Sensitive plant species. SC 2.1 is the wetland being rated in a Section/Township/Range that contains a natural heritage wetland? (This question is used to screen out most sites before you need to contact WNHP/DNR.) SITIR information from Appendix D or accessed from WNHPIDNR web site YES Contact WNHPIDNR (see p. 79) and go to SC 2.2 NO SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as a site with state threatened or endangered plant species? Cat I YES = Category 1 NO X not a Heritage Wetland SC3 Bogs (seep- 87) Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use the key below to identify if the wetland is a bog. If you answer yes you will still need to rate the wetland based on its function. 1. Does the unit have organic soil horizons (i.e. layers of organic soil), either peals or mucks, that compose 16 inches or more of the first 32 inches of soil profile? (See Appendix B for a field key to identify organic soils)? YES = go to question 3 NO = go to question 2 2. Does the wetland have organic soils, either peats or mucks that are less than 16 inches deep over bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on a lake or pond? YES = go to question 3 NO = is not a bog for purpose of rating 3. Does the unit have more than 70% cover of mosses at ground level, AND other plants, if present, consist of the "bog" species listed in Table 3 as a significant component of the vegetation (more than 30% of the total shrub and herbaceous cover consists of species in Table 3)? YES = Is a bog for purpose of rating NO = go to question 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" deep. if the pH is less than 5.0 and the "bog" plant species in `fable 3 are present, the wetland is a bog. 4. Is the unit forested (> 30% cover) with sitka spruce, subalpine fir, western red cedar, western hemlock, lodgepole pine, quaking aspen, Englemann's spruce, or western white pine. WITH any of the species (or combination of species) on the bog species plant list in Table 3 as a significant component of the ground cover (> .30% coverage of the total shrublherbaceous cover). Cat. 1 YES = Category 1 NO = Is nota bag for purpose of rating 1 Wetland Rating Form — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 Page I I of 12 IWetland name or number LJI 1 1 t 1 1 1 1 C4 Forested Wetlands (seep. 90) Does the wetland have at least 1 acre of forest that meet one of these criteria for the 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 function. Old-growth forests: (west of Cascade Crest) Stands of at least two three species forming a multi -layered canopy with occasional small openings; with at least 8 trees/acre (20 trees/hectare) that are at least 200 years of age OR have a diameter at breast height (dbh) of 32 inches (81 cm or more). NOTE: The criterion for dbh is based on measurements for upland forests. Two -hundred year old trees in wetlands will often have a smaller dbh because their growth rates are often slower. The DFW criterion is and "OR" so old-growth forests do not necessarily have to have trees of this diameter. Mature forests: (west of the Cascade Crest) Stands where the largest trees are 80 — 200 years old OR have an average diameters (dbh) exceeding 21 inches (53 cm); 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. Cat. I YES = Category I NO = X not a forested wetland with special characteristics SC5 Wetlands in Coastal Lagoons (seep, 91) Does the wetland meet all of the following criteria of a wetland in a coastal lagoon? 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 surface 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.) YES = Go to SC 5.1 NO X not a wetland in a coastal lagoon SC 5.1 Does the wetland meet all of the following three conditions? The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing) and has less than 20% cover of invasive plant species (see list of invasive species on p. 74). At least 314 of the landward edge of the wetland has a 100 ft. buffer of shrub, forest, or un -grazed or un -mowed grassland. Cat. The wetland is larger than 1110 acre (4350 square ft.) YES = Category I NO =Category 11 Cat. II SC6 Interdunal Wetlands (see p. 93) Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or WBUO)? YES = Go to SC 6.1 NO X not an interdunal wetland for rating If you answer yes you will still need to rate the wetland based on its functions. In practical terms that means the following geographic areas: . Long Beach Peninsula -- lands west of SR 103 . Gray land- Westport -- lands west of SR 105 . Ocean Shores-Copalis — lands west of SR 115 and SR 109 SC 6.1 Is the wetland one acre or larger, or is it in a mosaic of wetlands that is one acre or larger? YES= Category I1 NO = go to SC 6.2 Cat. 11 SC 6.2 Is the wetland between 0.1 and 1 acre, or is it in a mosaic of wetlands that is between 0.1 and 1 acre? YES = Category II I Cat. Il I Category of wetland based on Special Characteristics Choose the "highest " rating if wetland falls into several categories, and record on p. 1. If you answered NO for all types enter "Not Applicable" on p. 1 Comments: 1 Wetland Rating Dorm — Western Washington, Version 2 (7106), updated with new WDFW definitions Oct. 2008 Page 12 of 12 1 1 ATTACHMENT D 1 PHOTOGRAPHS 1 1 1 1 1 1 1 i7 1 1 1 1 1 1 ' Photograph 1. Wetland 1,looking north from the center of the wetland. Photograph 2. Wetland 1, looking south from west side. 1 City of Renton 558-1779.038 Wetland Impacts I r- July 20, 1011 1 1 1 G 1 1 1 1 1 1 1 1 1 Photograph 3. Buffer along southeast boundary between Wetland 1 and Elliot Spawning Channel, looking north. ' City of Renton 558-1779.038 Weiland Impacts D-2 July 20, 2011 1 1 1 1 1 1 1 1 1 1 1 1 1 ATTACHMENT E PLANTING PLANS / III.1-SS-ddd i� i I Q CSP SIRG�� Z LL, a� C13 3® u� S W cc o W O �0 z i V) J W a a J W Z gZ m a U Z z � a a IL rn O J W 5 0 s 6 Z W z { I Q. 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PLANNING . ENVIRONMENTAL sCIRNCRs 411 108th AVENUE NE, SUITE 1800 BEI.LEVUE, WA 98004-5571 T. 425.458.6200 F. 425.458.6363 www.parametrix.com TECHNICAL MEMORANDUM 1 Date: July 20, 2011 Renton cit Division oanning 3111- % 11511 nErEwY EV To: Steve Lee, City of Renton From: Matthew Maynard, Colin Worsley, PWS Subject: Stream Impacts ' cc: Jenna Friebel, Parametrix Project Number: 558-1779-038 Project Name: Elliot Spawning Channel Reconstruction 1 PURPOSE ' The purpose of this memorandum is to provide impacts to streams and their buffers caused by the Elliot Spawning Channel Reconstruction Project to satisfy the modified requirements of the Waiver of Submittal Requirements for Land Use Applications (dated May 13, 2011). ' PROJECT DESCRIPTION The project is a spawning channel maintenance project. The channel was originally built in 2001 as part of a mitigation project to offset the loss of sockeye salmon spawning habitat as a result of over -dredging in the lower river. The overdredging resulted during the U.S. Army Corps of Engineer's dredging of the lower 1.25 miles of the Cedar River as part of the lower Cedar River Section 205 Flood Hazard Reduction Project. The channel successfully provided additional habitat for various life history stages of salmonids ' present in the Cedar River until the 2009 flood event when the Cedar River overtopped its banks and scoured and deposited silt and woody debris in upper 900 feet of the spawning channel. Woody debris, erosion control structures, and habitat plantings were either washed away or damaged during these flood events. In addition, spawning gravels were displaced and silt was deposited on the channel bottom. The original design also included a permeable segment of levee. This segment of levee was also damaged in the floods and the hydrologic connection to the Cedar River was altered due to sediment deposition on the ' waterside of the levee. The project will include removing silt, restoring spawning gravel with smooth river rock along the channel bottom, and replacing large woody debris. In addition, any riparian areas disturbed during the work will be restored with topsoil refinishing, reseeding, mulching, and replanting native plants on the channel banks. Until riparian planting matures, erosion control measures are required. ' Materials such as straw bales, filter fabric, and sand bags will be incorporated. The City of Renton has received funding approval from the Federal Emergency Management Agency (FEMA) to reconstruct, restore, and rehabilitate the spawning habitat within the channel to pre -flood conditions with National ' Marine Fisheries Service (NMFS) and U.S. Fish and Wildlife Service (USFWS) concurrence already. 1 1 1 TECHNICAL MEMORANDUM (CONTINUED) STREAMS The project site is located within Water Resource Inventory Area (WRIA) 08, the Cedar-Sammamish Watershed. The Cedar River originates in relatively high mountain country of the Cascade Range near ' Stampede Pass. It flows generally west-northwest for nearly 50 miles to its confluence with the southern end of Lake Washington at Renton (Williams et al. 1975). Salmonid species in the Cedar River and its tributaries include Chinook salmon (Oncorhynchus tshawytscha), coho salmon (O. kisutch), ' sockeye salmon (O. nerka), steelhead (O. mykiss), and cutthroat trout (Oncorhynehus clarki elarki), and bull trout (Salvelinus confluentus) (in the upper watershed) (Kerwin 2001). In the vicinity of the project site, the wetted width of the Cedar River is approximately 60 feet and the river is flowing to the ' northwest. The Cedar River adjacent to the proposed project is heavily utilized for spawning by adult sockeye, Chinook and coho salmon. The existing natural side channels downstream of the Elliot levee are utilized for rearing by sockeye fry, Chinook fry and juveniles, coho and steelhead smolts (U.S. Army Corps of Engineers 2000). These streams are classified as Class I according to the ' City of Renton system because the Cedar River is a Shoreline of the State (RMC 4-3-050 L.1) and a Type 1 Water according to the Washington State system (WAC 222-16-031). ' The project is in a spawning channel along the left bank of the Cedar River (Elliot Spawning Channel). This channel is separated from the mainstem Cedar River by a small levee, receiving flow from groundwater and the Cedar River. The channel was originally constructed in 2001 to provide additional habitat for various life history stages of salmonids present in the Cedar River. It achieved this purpose until the 2006 and 2009 floods when the Cedar River overtopped the levee and scoured and deposited debris in the spawning channel. There are currently several large woody debris piles/jams and much of the site has silt and sand deposition from these flooding events. iAnother associated side channel is located at the west end of the project, and connects the Cedar River with the Elliot Spawning Channel during high flows. ' The riparian buffer associated with these streams is vegetated primarily with deciduous trees, shrubs, and invasive weeds. Dominant species include black cottonwood (Populus balsamifera), red alder (Alnus rubra), salmonberry (Rubus spectabilis), Indian plum (Oemleria cerasiformis), willows ' (Salix spp.) common snowberry (Symphoricarpos albus), Japanese knotweed (Polygonum cuspidatum), reed canarygrass (Phalaris arundinacea), and Himalayan blackberry (Rubus armeniacus). The riparian corridor is also used for passive recreation. The surrounding environment includes a city park, regional trail, and golf course. STREAM IMPACTS AND MITIGATION ' All activities will occur within the 100 -year floodplain of the Cedar River, and within the footprint of the existing/original Elliot Spawning Channel project limits. See Attachment A for specific locations of the project elements. The project includes the repair/reconstruction of approximately 900 feet of the Elliot Spawning Channel, and replacement of spawning channel gravel. Since the permeable levee was first constructed, sand and gravel bars have built up against the levee, disconnecting the mainstem Cedar River from the permeable levee. To re-establish the hydrologic connection, a 10 -foot -wide backwater channel will be constructed from the edge of the Cedar River to the levee to allow a pathway for water to reach the permeable levee. Approximately 310 cubic yards of sand and gravel will be removed from the Cedar River to create the ' backwater channel. ' CiAl of Renlnn Stream Impacts 1 558-1779-038 July 20, 2011 1 1 TECHNICAL MEMORANDUM (CONTINUED) ' Approximately 1,130 cubic yards of mostly fine sediment will be removed from the spawning channel to re-establish the original channel grade to a free-flowing channel during spawning periods. Additionally, approximately 340 cubic yards of the dredged material will be replaced with streambed gravels to ' reestablish spawning habitat. A small amount of fill (46 cubic yards) will also be placed in the existing channel to form the sides of the new channel. The fill will likely be the material excavated from elsewhere in the channel. The project includes repair of a 100 -foot -long section of the levee located at the head of the spawning channel. The repair will entail replacement of approximately 185 cubic yards of heavy loose riprap at the base of the levee. This permeable material will allow water from the Cedar River to flow through the base of the levee to provide a source of hydrology to the spawning channel in accordance with the original design. The permeable levee rock will be sized to allow flow through it and will be heavy enough to reduce the risk of damage during future flood events. Approximately 70 cubic yards of 2"-8" minus ' quarry rock and 30 cubic yards of quarry spalls will be placed on top of the permeable layer of the levee to re-establish the gravel road. All placement of these materials will occur outside of the Cedar River ordinary high water tine (see Attachment A). There are two locations along the existing spawning channel where log debris from floods has blocked the spawning channel. A portion of these jams will be removed to ensure fish passage once the channel has been restored. Logs that are removed will be placed outside the channel and used for riparian habitat to ' the extent possible. Best management practices will be used during construction to ensure that impacts to the aquatic ' environment are avoided and/or minimized. The Integrated Strcambank Protection Guidelines will be followed, work will occur during the Washington State Department of Fish and Wildlife work window to the extent possible, and water control structures for the spawning channel will minimize the potential for sediment flushing when the spawning channel is reactivated. Sandbag dams (or other equivalent methods) and fish exclusion nets will temporarily be placed within the spawning channel, the side channel connecting the spawning channel to the Cedar River, and the Cedar River. The dams will be used to prevent water from the Cedar River from entering the work zone during summer storm events. The dams ' will also contain any groundwater that upwells during the channel excavation process within the limits of construction. The dams will be removed once the channel has been stabilized and is ready to be reconnected with the Cedar River. In addition, any riparian areas (stream buffers) disturbed during the work will be restored with topsoil refinishing, reseeding, mulching, and replanting native plants on the channel banks (Attachment B). Until riparian plantings mature, erosion control measures are required. Materials such as straw bales, filter ' fabric, and sand bags will be incorporated. REFERENCES ' Kerwin, J. 2001. Salmon and Steelhead Habitat Limiting Factors Report for the Cedar-Sammamish Basin (Water Resource Inventory Area 8). Washington Conservation Commission, Olympia, Washington. ' U.S. Arany Corps of Engineers. 2000. Environmental Assessment for the Elliot Rearing/Spawning Channel -- Mitigation for Overdredging Associated With the Cedar River 205 Flood Control Project. Seattle District, Seattle, Washington. ' Williams, W.R., R.M. Laramie, and J.J. Ames. 1975. A catalog of Washington streams and salmon utilization. Volume 1, Puget Sound Region. Washington Department of Fisheries, Olympia, Washington. City of Renton 558-1779-038 Stream Impacts 3 July 10, 1011 Irk 1 1 1 F1 1 1 1 t 1 ATTACHMENT A FI_I.I J_1F3 : 144 jl�j 1 1 1 1 1 1 1 1 1 1 t 1 1 i 1 1 144TH PROJECT LOCATION c� I--- MAPLEWOOD GOLF COURSE= r tin "I mM Renton LOCATION Issaquah Ball 'Meld RON REGIS PARK parking 5S RBNrp� �4AC� VALLE Y �D I PURPOSE: TO REPAIR THE EXISTING SPAWNING PROPOSED: ELLIOT SPAWNING CHANNEL RIVER EL ADJACENT TO THE CEDAR VICINITY MAP i DATUM: VERT: NAVD 88 (CORPS) 0 S00 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22, T, 23 N, R. SE, W. M. BASIN: CEDARISAMMAMISH SCALE 1-= 500' FROM: LATITUDE - 47'28'10" LONGITUDE - 122' 08'51" ADJACENT PROPERTY OWNERS: APPUCANT. CITY OF RENTON, WA TO: LATITUDE - 47' 28'10' CITY OF RENTON LONGITUDE - 122' 09'06' DATE: JULY 2011 SHEET: 1 OF 10 1 1 1 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 I SANDBAG DAM + TYP. f� EXIST. CHANNEL ROCK EDGE DEWATERING PIT ;z LAND APPLY / LEVELj SPREADER WETLAND # 1 WETLANDIf 50' - 5 BUFFER �1 APPROXIMATE EXIST. t CHANNEL CENTERLINE EXIST. 6' HIGH CHAINLINK FEN, LEGEND: WETLAND — — — — WETLAND BUFFER TEMP. WETLAND WETLAND BOUNDARY BUFFER IMPACT _-- —ORDINARY HIGH WATER LINE -----c-----c— CUT LINE (DAYLIGHT) -----r-----F— FILL LINE (DAYLIGHT) — — — --- EXISTING CHANNEL CENTER LINE — — —PROPOSED CENTERLINE CHANNEL EXISTING RIPRAP EXISTING LEVEE SANDBAG DAM PURPOSE: TO REPAIR THE EXISTING SPAWNING TEMPORARY EROSION CHANNEL ADJACENT TO THE CEDAR CONTROL RIVER DATUM: VERT: NAVD 88 (CORPS) HORIZ: NAD 83/91 (CORPS) BASIN: CEDAR/SAMMAMISH ADJACENT PROPERTY OWNERS: CITY OF RENTON 0 B0 SCALE 1' - BY APPLICANT: CITY OF RENTON, WA FISH EXCLUSION NET SANDBAG DAM (PLACED AT ENTRANCE FROM RIVER) N CHANNEL HIGH WATER F TEMPORARY ;Y ACCESS ROAD Ni IMITS OF IMPACT XISTING ACCESS ROAD . Jf PROPOSED CHANNEL f( CENTERLINE �TEMPORARY`'`.'. ROADSS A NOTES IMPACTS WITHIN OHW ARE COUNTED AS STREAM IMPACTS AND NOT AS WETLAND BUFFER IMPACTS. SEE TABLE 8e OF DARPA. PROPOSED: ELLIOT SPAWNING CHANNEL LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N. R. 5E. W. M. FROM: LATITUDE -47'28'10' LONGITUDE -122°08'51' TO: LATITUDE - 47'28'10' LONGITUDE - 122'09'06" DATE: JULY 2011 SHEET: 2 of 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 t 1 1 1 �V/ V��1 aj 4C � 44:0� 3 jlr��i 4kQ!' IMITS OF . /MPACT 3I AN XISTING ACCESS 3 ROAD 1 - EXISTING LEVEE/RIPRAP ORDINARY TEMPORARY HIGH WATER ACCESS ROAD EXIST. 6' HIGH CHAINLINK FENCE OHWL TYP, 12-6-2010 APPROXIMATE EXIST. CHANNEL CENTERLINE CEDAR) ;�;, XCLIJS10N04EE:�; <� --L-SANDBAG _.c DAM — PROPOSED CHANNEL CENTERLINE s LEGEND: WETLAND — — — — WETLAND BUFFER s WETLAND BOUNDARY TEMP, WETLAND - BUFFER IMPACT ----ORDINARY HIGH WATER LINE -----c-----c— CUT LINE (DAYLIGHT) -----r-----r— FILL LINE (DAYLIGHT) —EXISTING CHANNEL CENTER LINE �— —PROPOSED CENTERLINE CHANNEL E EXISTING RIPRAP 5 EXISTING LEVEE r SANDBAG DAM ? PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING TEMPORARY EROSION CHANNEL ADJACENT TO THE CEDAR CONTROL RIVER - DATUM: VERT: NAVD 88 (CORPS) o LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83!91 (CORPS) S. 22, T. 23 N, R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE I"- BIT FROM: LATITUDE - 47'28'10" - 122'08'51' ADJACENT PROPERTY OWNERS:LONGITUDE APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47`28'10' CITY OF RENTON d LONGITUDE - 122'09'06' DATE: JULY 2011 SHEET: 3 of 10 9 1 1 1 i i 1 1 1 1 1 1 1 1 i 1 1 1 t SELECTNE REMOVAL OF DEBRIS FOR FISH PASSAGE WITHIN CHANNEL ---------i `83;,. rCrr- r•C• 1 IMPACT \` HIGH WATER I ;1 BU AN co ------------------ , cz 1 ! ! C,/ LEGEND: WETLAND ---- ORDINARY HIGH WATER LINE TEMP. WETLAND ----------c— CUT LINE (DAYLIGHT) ___�_____�_ FILL LINE (DAYLIGHT) ' BUFFER IMPACT —' ) LARGE WOODY EXISTING CHANNEL CENTER LINE �l DEBRIS —PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP WETLAND BOUNDARY EXISTING LEVEE i PURPOSE: TO REPAIR THE EXISTING SPAWNING g CHANNEL ADJACENT TO THE CEDAR RIVER DATUM: VERT: NAVD 88 (CORPS) HORIZ: NAD 83191 (CORPS) BASIN: CEDAR/SAMMAMISH ADJACENT PROPERTY OWNERS: CITY OF RENTON IMPACTS PLAN 0 20 SCALE 1' . 20' APPLICANT: CITY OF RENTON, WA PROPOSED: ELLIOT SPAWNING CHANNEL LOCATION: KING COUNTY, WASHINGTON S. 22, T. 23 N, R. 5E, W. M. FROM: LATITUDE - 47'28'10' LONGITUDE - 122'08'51' TO: LATITUDE -47'28'10" LONGITUDE - 122'09'08' DATE: JULY 2011 SHEET: 4 of 10 1 1 1 1 L 1 7 LJ 7 LJ 1 1 1 1 1 _ MATCHLINE SEE SHEET 4 �. co I' I l J` 1 I cc ;......:1;, '' I', I , ll II xj r- I i %4 1.• ` n LIMITS OF IMPACT- ! o. wETv+>uD BUFFER - IMITS OF ;I I f• •�� /' IMPACT n 'i ��•�� n cA 1 R ROIPOM Y ' HIGH WATER Vo? 1 , I!1 � I .f MA�FILTi !9EE SHEET -- --- LEGEND: PURPOSE: TO REPAIR THE EXISTING SPAWNING WETLAND ----ORDINARY HIGH WATER LINE .,-...'. TEMP. WETLAND -----c-----e:^ CUT LINE (DAYLIGHT) ' BUFFER IMPACT -----f-----r- FILL LINE (DAYLIGHT) 0 20 LARGE WOODY—EXISTING EXISTING CHANNEL CENTER LINE DEBRIS —PROPOSED CENTERLINE CHANNEL — — — -- WETLAND BUFFER EXISTING RIPRAP "' WETLAND BOUNDARY EXISTING LEVEE PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY. WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22. T. 23 N. R. 5E, W. M. BASIN: CEDAR/SAMMAMISH SCALE 1".20' FROM: LATITUDE - 47'28'10' LONGITUDE - 122'08'51" PROPERTY OWNERS: ADJACENTAPPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47'28'10' CITY NTONPROPS LONGITUDE -122°09'06" DATE: JULY 2011 SHEET: 5 of 10 1 1 1 C 1 u 1 1 1 1 1 1 1 t MATCHLINE SEE SHEET 5 - - I -- I -- -- --- IN i 1 f 1 \ C ' 1 1 1 I i 1 AI \\ EXISTING WETLAN 5 55`11\ ` 1 111 1151 D ,. 1 ", 1 `. \ LEVEE BUFFER 1t �If � 5 ', 1 cpQ 1155 V, `1:1j , ` "' LEGEND: WETLAND ----ORDINARY HIGH WATER LINE TEMP. WETLAND CUT LINE (DAYLIGHT) BUFFER IMPACT FILL LINE (DAYLIGHT) LARGE WOODY — EXISTING CHANNEL CENTER LINE DEBRIS —PROPOSED CENTERLINE CHANNEL — -- — — WETLAND BUFFER EXISTING RIPRAP WETLAND BOUNDARY EXISTIMG LEVEE 84 ------ HIGH WATER A ,--LIMITS OF M PACT CA OD �\ 190Iaff E�SFItlpff l PROPOSE[]: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING g CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER 5 DATUM: VERT: NAVD 88 (CORPS) 0 24 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22, T. 23 N, R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE V - 20' FROM: LATITUDE -47'28'10' LONGITUDE - 122'08'51' ETOWNERS:: PROPS ADJACENT PROPERTY O T APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47'28'10' CITY NTON LONGITUDE - 122°09'06" DATE: JULY 2011 SHEET: 6 of 10 y 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MATCHLINE SEE SHEET 6 �o LIMITS OF IM PACT - ORDINARY HIGH WATER mv LEGEND: PROPOSED: ELLIOT SPAWNING CHANNEL WETLAND ----------ORDINARY HIGH WATER LINE TEMP. WETLAND Y`=--�-----c— CUT LINE (DAYLIGHT) BUFFERIMPAGT -..F -____F- FILL LINE DAYLIGHT (DAYLIGHT) LARGE WOODY=— EXISTING CHANNEL CENTER LINE LOCATION: KING COUNTY, WASHINGTON DEBRIS — PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP — WETLAND BOUNDARY EXISTING LEVEE PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING EL ADJACENT TO THE CEDAR IMPACTS P LAN RIVER DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22, T. 23 IN, R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE I'=20' FROM: LATITUDE -47°28'10" LONGITUDE - 122'08'51' ADJACENT PROPERTY OWNERS: APPLICANT: CITY OF RENTON, WA TO: LATITUDE -47'28'10' CITY RENTON LONGITUDE - 122'09'06' DATE: JULY 2011 SHEET: 7 o(10 r P, t 1 t 1 r� i t C 1 L t 1 1 1 Z W ORDINARY -�'I W W HIGH WATER LIMITS OF -°" I W _ - IMPACT r_ W - W iLU W i IN -- --- uj - _ a� Z---- -------------------- J - - - " "c_ - -y-`- I — v I J F... - - ------------ -------------------------------------------------------- - - --------- � `----- -- �o RDINARY --- --------------------------------------- - - - - --- -----" B4--- ____-- --- HIGH WATER --------------c---- -- --------- LIMITS OF IMPACT ---------------------------------------8A 85 -------------------• 86 ------ --------------- LEGEND: WETLAND WETLAND TEMP, WETLAND BUFFERIMPACT LARGE WOODY ORDINARY HIGH WATER LINE -----c-----c— CUT LINE (DAYLIGHT) -----r-----r— FILL LINE (DAYLIGHT) — EXISTING CHANNEL CENTER LINE DEBRIS — — —PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFEREXISTING RIPRAP WETLAND BOUNDARY � EXISTING LEVEE ? PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON S HOR1Z: NAD 83191 (CORPS) S. 22, T. 23 N. R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE l'-ZY FROM: LATITUDE -47°28'10" LONGITUDE - 122°08'51" ADJACENT PROPERTY OWNERS: APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47°28'10' CITY OF RENTON o LONGITUDE - 122°09'06" DATE: JULY 2011 SHEET: 8 of 10 1 [1 1 i 1 rl 1 i 1 L t I 1 t ------------- - I to I � r W -ORDINARY �' - -87- - - - HIGH WATER W I - _------------------ -- ----- -- I W ---------------------- --------- ---- EiMITS OF- -I W - ------------------ -----------i 86 /� _._IMPAC'r - '- __.___-- -- ------------------- _ -G' _c _-- - •� _ -_ _______________________________- ~� I IMITS OF W �� IMPACT ----------- -- (01 f W I - --_ -a,_ �� HIGH WATE-------------R LEGEND: WETLAND ---- ORDINARY HIGH WATER LINE -----c-----c— CUT LINE (DAYLIGHT) TEMP. WETLAND ___�_____�_ FILL LINE DAYLIGHT '- BUFFER IMPACT —' (DAYLIGHT) LARGE WOODY— — EXISTING CHANNEL CENTER LINE DEBRIS —PROPOSED CENTERLINE CHANNEL — -- — — WETLAND BUFFER EXISTING RIPRAP WETLAND BOUNDARY EXISTING LEVEE PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION. KING COUNTY, WASHINGTON HORIZ: NAD 83191 (CORPS) S. 22, T. 23 IN, R. 5E, W. M. BASIN: CEDARISAMMAMISH SCALE V = 20' FROM: LATITUDE - 47'28'10' LONGITUDE - 122.08'51• ADJACENT PROPERTY OWNERS: APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47'28'10" CITY OF RENTON LONGITUDE - 122'09'06' DATE: JULY 2011 SHEET: 9 0110 1 1 L 1 F� 1 1 1 J i1 1 CEDAR RIVER 7 --let ---- -- ' -- --- _------ ---.SELECTIVE `REMOVAL OF `'- DEBRIS-_WLT�iIN._NEW -CHANNEL •��- - - ------ - -- -� -- i,,�,, o' (ORDINARY t L~LIIHIGH WATER LL,II i-- _� - W _ U) ----------- UP .- -- WI BEf2 CHANNEL------- ---- TWPERMEABLE-LEVEE.__-___--______35 84 ---------------- _-------- - ---- 06 ------- -LIMITS-OF IMPACT - :D4 -------------g6--- ------------ ----------- ------ j ------ f f —r— % PERMEABLE LEVEE REPAIR,' - EXISTING LEVEE LEGEND: PROPOSED: ELLIOT SPAWNING CHANNEL WETLAND ----ORDINARY HIGH WATER LINE TEMP. WETLAND -----c-----c– CUT LINE (DAYLIGHT) - ' BUFFER IMPACT ----- _---- – (DAYLIGHT) r r FILL LINE DAYLIGHT LARGE WOODY _ EXISTING CHANNEL CENTER LINE LOCATION: KING COUNTY, WASHINGTON DEBRIS —PROPOSED CENTERLINE CHANNEL — — — — WETLAND BUFFER EXISTING RIPRAP — WETLAND BOUNDARY EXISTING LEVEE HIGH._WATER"-- ------ --87 PROPOSED: ELLIOT SPAWNING CHANNEL PURPOSE: TO REPAIR THE EXISTING SPAWNING CHANNEL ADJACENT TO THE CEDAR IMPACTS PLAN RIVER DATUM: VERT: NAVD 88 (CORPS) 0 20 LOCATION: KING COUNTY, WASHINGTON HORIZ: NAD 63/91 (CORPS) S. 22, T. 23 N, R. SE, W. M. BASIN: CEDARISAMMAMISH SCALE l'- 20' FROM: LATITUDE -47'28'10" - 122'08'51" ADJACENT PROPERTY OWNERS:LONGITUDE APPLICANT: CITY OF RENTON, WA TO: LATITUDE - 47'28'10" CITY OF RENTON LONGITUDE - 122'09'06" DATE: JULY 2011 SHEET: 10 of 10 1 [1 1 1 1 1 t 1 1 1 u ATTACHMENT B PLANTING PLANS / LU"S-ddd 11 Z n O � rryW Q u z W W U � s i J ® �cn m U) a ®w U z J o W z z a L. z g a �o z z z a 3 CL N J ui III 0 6 z � I I I I I I I I I 3rvaN 103road I m OS K;01 1102 'OL AW 'A-P—P.gl -31VO IN -BIM le 03LIOld \6•0\YO 'PPI\10 F4oV OWY7\�Y56G\I�ISaP+tlwad517POfl 4[0-6111-9SS\wWd 1^ ASW-6111\')w4]\FP0D/ I d\ a\IPg\'n Turd I -Sl �1MAYl lo-srollodxflattlpssie 31u I 33 2 z � s i J ® �cn m U) a ®w U z J o W z z a L. z g a �o z z z a 3 CL N J ui III 0 6 z � I I I I I I I I I 3rvaN 103road I m OS K;01 1102 'OL AW 'A-P—P.gl -31VO IN -BIM le 03LIOld \6•0\YO 'PPI\10 F4oV OWY7\�Y56G\I�ISaP+tlwad517POfl 4[0-6111-9SS\wWd 1^ ASW-6111\')w4]\FP0D/ I d\ a\IPg\'n Turd I -Sl �1MAYl lo-srollodxflattlpssie 31u I I I 1 1 I 1 I I 1 I 1 I I I I'SS-ddd 3rrvrm mrodd i I i I 151 v 1'1 `11 N 1 y qJ I IJR a m I 0 L9 I I I I I I I I I . 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