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Wetlands Inventory - PLN General - 3/30/2003
THE COOT -COMPAN , Wetland and Wildlife Consulting Services 416 S. Washington Olympia,WA 98501 (360)352-9897 FAX(360)352-9914 WETLANDS INVENTORY FOR THE ALDE"ROOK/SR-106 RELOCATION S33T22NR3W Mason County MARCH 2O03 (REVISED) prepared for: Barbara Anderson Woerman Collins 777 108`h Avenue NE, Ste 400 Bellevue WA 98004 prepared by: �_����"`` o, Wetlanq s� ,&A iy k 0 0 100 S. Shanewise, PWS yy na�Wetla�d s Senior Ecologist sw. c 000994��,ass� :i-�- - AldermrOrpt CONTENTS Figure 1: Vicinity Map Introduction............................................................................1 Methods..................................................................................I Results....................................................................................2 Exhibit 2: Survey Map—Project Area Exhibit 2a: Survey Map—West Hillside Wetland Mosaic Exhibit 2b: Survey Map—East Hillside Wetland Mosaic Figure 3: Soils Map Figure 4: National Wetlands Inventory Map Figure 5: USGS Topography Map Appendix I: Wetland Descriptions Text Data Sheets Category Ratings References 2 4 N A+ L "�� „.I� NSA �rr � Ii l�a. Et Chi v .rr+r•s wn `•�-"�_ N A ' L At ter TJ! �Q T1r vt76� I'n• cxr raa+` ' V. as u Ro s FOR F . ',71 ^i rVl4rrt Iw I �,� v.,.K y 1 lS _ �. c`'`-s - on �Klplsm � ��yrrtrt,h't ..��� :/:. . �� K•r•s+:cal• f} ��Y,..,v� :. � - \ r J, � I :,.•, i s....`°.. _ r /M ORCtv1CR N` +' ^ J"' =� `�•.r.Y ,�i fA eilf ,.«rMPne :.`r.J;,ww,I i �j is....•w. ,� 1 1 is Ieyyy,Ctr'� �3 r1 ,l��.s,.r , '4` onvurit K/ - «..� I'\ llt}YeuDl 't': f oJr� �`- ,"1raN. � a2hu r u _I S� -- 11 r, �N\. 1 ' /• - P.YMM1cn 1 r I V yL r n K f i y� f "tl fro n..� _ -�1_ nM+ l�-� •' •4 - T°II •~�' �1 &:Rnr -_"�tawil `a � III r. '- tbtenfn � + •, ''/ r �l fi l, 'a•. �' Af, 'firekMn tlu.i �• - 1 VIfP �L /v y -. •. lr .r;T rJ; f �♦' f i-!_. I I r. Y ,?+''.,11 IfR�SHy. I - .. 4, e r � �� �� atl�Pi►err _ T � r� f ' � � I----1 �, , wx It El-Ma. � d S33T22NR3W ALDERBROOK/SR-106 RELOCATION VICINITY MAP Partial Legend X= Project location N TO �1 FIGURE 1 INTRODUCTION This report documents the wetland and stream conditions along a .5-mile road realignment project for SR-106 on Hood Canal. The realignment action is primarily driven by safety concerns,but it will also facilitate a major stream restoration project along Alderbrook and Dalby Creeks. Current road crossings of these two systems prevent anadromous fish access to 95% of the available watershed within both streams. Stream channel enhancement will also occur to provide high quality spawning and rearing habitat. In addition to these two primary streams, two small Type 5 drainages and two minor slope wetlands occur within the proposed realignment path. METHODS Site Inspection Field review of the project was performed on 25 May 2002, 26 February and 3 March 2003. Field review included all undeveloped areas within project clearing limits. Alderbrook and Dalby Creeks Excluded Detailed stream/wetland information for these two systems is not included within this report. Information on these streams has been provided within the restoration documents prepared for the enhancement project. The stream enhancement project will include all impacts to Dalby and Alderbrook Creeks and be authorized under a NWP #27. Road realignment project impacts to the two wetlands and Type 5 streams will be authorized under a NWP #14. Wetland Classification Wetland characteristics are described within this report according to the Fish and Wildlife Service Cowardin Classification System (1989). Wetland Delineation Wetland delineation followed a Routine Methodology based upon the Washington State Wetland Identification and Delineation Manual(1997)requiring positive indicators for wetland soil, hydrology, and plants: Wetland hydrology was determined by water conditions in pits; Presence of hydric soil was determined by soil conditions in pits dug around suspected wetlands. Soil inspection included comparison with the Munsell Color Charts (1992). General soil characteristics were derived from information contained within the Soil Survey of Mason County, Washington. U.S.D.A. Soil Conservation Service (1951). ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 1 J Occurrence of wetland vegetation was determined through species identification, estimation of dominance and then assignment of wetland indicator status; indicator status was assigned based upon the National List of Plant Species That Occur In Wetlands (1988 spp.1993). Wetland Category Rating The Washington State Wetlands Rating System for Western Washington (1993) was used to establish Category Ratings for the wetlands. Confirmation Wetland status depicted in this report has not been confirmed by a government official,and therefore has no legal status. Agencies with jurisdictional authority over wetlands at the local,state and federal level need to be consulted for their signed agreement to our findings before there is any guarantee of no change. Our estimation for the accuracy of the unconfirmed wetland boundaries portrayed within this report is >95%. RESULTS Variable Topography The proposed road realignment has dramatically different topography between the east and west ends. The east end cuts across a steep slope descending hundreds of feet along the shoreline bluffs common to Hood Canal. However, at the point where Alderbrook Creek is crossed topographythen flattens to gently sloped ground from here to the g Y p project's western terminus. The wetlands and streams described within this report all occur within the eastern, steep-sloped part of the proposed new roadway. Minor Hillside Seeps Two, small wetland systems occur along the realignment path that are minor, hillside seeps. Surface water is restricted to seasonal flows artificially consolidated by decades old dozer cuts at terminuses. Soil saturation is caused by daylighting groundwater, and appears to occur at many locations along the uphill wetland boundary. Both wetlands have downslope terminuses where hydrology seeps subsurface again and soil saturation ceases. Minor outlet channels that drain from the downslope points on both wetlands also fade from defined channels to vegetated swales that technically lack either stream or wetland conditions. Old Dirt Roadway An old dirt roadway was cut across the slope where the two wetlands occur, and this roadway now intercepts most wetland hydrology. Where this roadway occurs, downslope conditions are entirely upland. It seems likely that the past road builders cut their path just below where the wetland seep naturally disappeared, but the hydrology then drained into the flat roadway and created new wetland conditions below where the natural wetlands had previously occurred. ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 2 Weak Technical Connection To Hood Canal Technical conditions for regulated stream and wetland habitats terminate prior to their connection with the ditch along SR-106. Surface water from this ditch drains through culverts and beneath adjacent developed ground before finally reaching Hood Canal over 200 feet away. Although surface flows drain from the wetlands to the roadside ditch during winter, this weak connection to Hood Canal should not qualify these wetlands as associated with tidal waters. Small, Headwater Streams Two small, Type 5 streams also occur along the steep slope near the two slope wetlands. The west stream drains to an intake grate at the slope toe where solid pavement begins. From here, the surface flow is culverted west into the Alderbrook Creek channel. The east stream drains to the SR-106 roadside ditch and to Hood Canal through the same culverts as the east wetlands. Low Value Systems Both the wetlands and streams described here are low value systems with minimal function performance. Water quality and quantity benefits from the densely vegetated sloped wetlands are the primary function of these systems. The seasonal fishless stream flows should contribute organic matter to Alderbrook Creek,but the low volumes involved limit the total value of this action. Habitat structures of all four systems are simple, and recent past disturbances have occurred. Avoidance of these systems by the proposed project is unwarranted, and mitigation compensation requirements should be minimal. Total Impact Area The total areas of impact are provided below for each of the six systems involved with this project. SYSTEM IMPACT AREA(ACRES) EAST TYPE 5 STREAM 166 SQ FT EAST SLOPE SYSTEM 8,194 SQ FT WEST TYPE 5 STREAM 217 SQ FT WEST SLOPE WETLAND 12,654 SQ FT ALDERBROOK CREEK 0 SQ FT DALBY CREEK 318 SQ FT TOTAL IMPACT AREA 21,549 SQ FT Detailed wetlands/streams Description Two slope wetlands and two Type 5 streams were identified for this project. The two slope wetlands have very similar habitat conditions due to topography, groundwater and past disturbances. Therefore, these systems are described in a single detailed description "East and West Wetlands"in the appendix. The two Type 5 streams also have very similar habitat conditions and are therefore described in a single detailed description "East and West Streams" in the appendix. ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 3 • J '— � l e EXI N E OOK R R to 14 000, •.. 11 12 EAS PE 5 WET ND /I A AREA 1 SF EAST HZLLSID ND C T� . f o o yip�O i �` B6K Idly iLbTNG C WEST HILLSIDE WETLAND MOSAXC-_"" O • LOW EAST WETLAND Z14APCT WEST TYP RAINAGE - 'P`�. AREA = ,434 SF o ZMPA = 2 O W T WATER TRE/1�►wffl r0 ♦P T .e0 UPPER EAST WETLAND IMPACT O¢ AREA = 1,760 SF �'1QERBROOK RESORT JEFF RAKES 1 cG_ - - - - - -- - - - - - WETLAND IMPACT AREA SUMMARY - - EXHIBIT NO 2 WEST TYPE 5 STREAM = 217 SF WEST HILLSIDE MOSAIC=12,654 SF ALDERBROOK SEPA DOCUMENTATION EAST HILL SIDE MOSAIC= 8,194SF NOTE.SEEPAGE SOAKS EAST TYPE 5 STREAM = 166 SF WETLAND IDENTIFICATION INTO THE GROUND TOTAL WETLAND NO OVERLAND CONNECTION IMPACT AREA = 21,231 SF ILLUSTRATION OF TOTAL WETLAND TO HOOD CANAL. = 0.49 AC. IMPACT AREA SCALE. 1" = 120' syl j BUILDING ai` — j.., BROOKSIDE EXHIBIT NO 2-A WETLAND IDENTIFICATION ,• ' IVA �. - �. - OW FRA IVA ol A LDERBROOKDOCUMENTATION WETLAND IDENTIFICATION EAST HILLSIDE WETLAND MOSAIC SCALE /� 1 i .4 r L x I PROJECT 't AREA Lb lderbrook ? _;; _ kb Ad� ..� t'A F I•..9 rr AO S33T22NR3W Sheet#10 ALDERBROOK/SR-106 RELOCATION SOILS MAP Partial Legend Eh = Everett gravelly sandy loam, 5-15%slopes T Ac=Alderwood gravelly sandy loam, 15-30%slopes N Scale 1:31680 Soil Survey of Mason County Soil Conservation Service M O 'I'l ►hY -All locations approximate- FIGURE 3 M{Y V PEMIY —m L' PSStY f , PSSiY \1 SStY y k4SRY J PS�{Y PONZ /p7�IC 1 1P�1Nz '6y /€PFOIY 14WL a ih ,l t PEl'I1W a 1 R95BY-�1. , >Af. ; Tt 2T AASBY--� / r•3�1 -P6MIW ZEni1 Pam . 11 PROJECT �' >=2>ae ,� f AREA �POP.Z2 PSSIY •S j PA13AZK-.W ; �4 \ X _ E2EMt1! - Ge ?55 1'Y _ eEM{wr U i7at2 h P55I r PE.14IY a PE+,'1 Iw h n £hAIP '"i, PEN �lYh POwZ fly Ri0WV L f>~1FL'R PEMIY PSS{i_ MIR PYSly.4 , y� SiY ! PFOIW - 1 S33T22NR3W Potlatch, WASH Mason County ALDERBROOK/SR-106 NATIONAL WETLANDS INVENTORY MAP T N US Department of Interior Fish and Wildlife Service Prepared by National Wetlands Inventory Scale 1:62500 1987 -All locations approximate- Tn C407'COY FIGURE 4 0 O O C r. - q Ar - P OJECT . , A EA � 1 S33T22NR3W ALDERBROOK/SR-106 RELOCATION USGS TOPOGRAPHY MAP T N Scale 1:2,500 ©2000 National Geographic Holdings T—H CM -• • wo -All locations approximate- FIGURE 5 _ I APPENDIX I TO WETLANDS INVENTORY FOR THE ALDERBROOK/SR-106 RELOCATION EAST AND WEST WETLANDS LANDSCAPE POSITION: Hood Canal Watershed These wetlands are Slope systems set near the toe of the large bluffs descending to Hood Canal. Although these wetlands attain at least a temporary surface water connection through culverts to Hood Canal, this connection is weak, and most likely the result of the construction of SR 106. These wetlands should not be deemed adjacent to tidal waters. CLASSIFICATION These wetlands are small, forested seeps covered with young regrowth red alder(Alnus rubra) and a dense herbaceous layer of skunk cabbage (Lysichiton americanum) and bracken fern(Pteridium aquilinum). Hydrology results from groundwater daylighting against a shallow till layer. These seeps disappear downslope where the till stops and is replaced by pervious sand and gravels that drain the water subsurface. Past construction of a dirt road has altered native ground conditions by intercepting hydrology and probably expanding the footprint of technical wetland conditions. Small, short "stream" channels occur at the downslope terminuses of each wetland that quickly fade to ill- defined, vegetated, nonwetland swales. Cowardin Dominant Vegetation PALUSTRINE Alnus rubra Forested,broad leaved deciduous Rubus spectabilis Saturated, fresh Lysichiton americanum Mineral Pteridium aquilinum W WETLANDSI APPENDIX I: EAST AND EST i BOUNDARY DELINEATION These wetland boundaries are generally indistinct edges that meander through the landscape moving across a wide range of topographic elevation. Some mosaic conditions occur on slight rises, or where subsurface sand lenses likely occur(HartCrowser 16 May 2002 Draft Memorandum.) Lack of hydric soils was the most common factor limiting wetland occurrence, even though plants, and sometimes hydrology, were still positive. Following careful review and analysis of site conditions,boundary flagging basically involved flagging in all ground that had skunk cabbage (Lysichiton americanum) growing from it. The following table depicts general field indicators used to delineate this wetland boundary: WETLAND UPLAND Ly sichiton americanum 1 chroma 2 chroma Saturated to surface Dry at surface BOTH Alnus rubra Rubus spectabilis Everett Soil Series APPENDIX I: EAST AND WEST WETLANDS 2 FUNCTION ASSESSMENT The following is a list of commonly recognized wetland functions, with an estimated relative value rating for this wetland and a brief conceptual statement regarding the primary factor affecting this rating. A summary table is also provided for quick reference. HIGH MODERATE LOW NOT APPLICABLE 0 2 5 1 Biol;ltration MOD Slow percolation of water through dense vegetation and saturated surface soils Groundwater Recharge MOD Subsurface seepage at base of shoreline bluffs along Hood Canal Plant/Animal Habitat Value LOW Low diversity; small size; lack of surface water; past disturbances Sediment Capture LOW Sloped systems lacking significant depressions or restricted outlets Surface Water Runoff Route LOW Small, short, poorly defined surface flow paths Surface Water Supply LOW May contribute groundwater flows in summer to Hood Canal Stormwater Detention LOW Sloped systems lacking significant depressions or restricted outlets Flood Attenuation NA Not associated with Riverine system CATEGORY RATING: III (16 points) These wetlands qualify for Category III ratings because they contain a single habitat class and lack high structural diversity. A Category I Mature Forest rating was not possible due to the young age of the trees. APPENDIX I: EAST AND WEST WETLANDS 3 EAST AND WEST STREAMS LANDSCAPE POSITION: Alderbrook Creek and Hood Canal Watersheds These small streams are situated along the base of the steep slopes descending towards Hood Canal from the surrounding bluffs. The east stream connects to the SR-106 roadside ditch that drains 200 feet through a culvert to Hood Canal. The west stream drains through a culvert to Alderbrook Creek within 300 feet of Hood Canal. CLASSIFICATION These streams are small, headwater systems with a total length of probably a few hundred feet. The channels average a foot in width and have well-defined, slightly incised scour patterns indicative of the fast, flashy flows that should occur during storm events. Fish do not occur, and access to the channel is blocked by the outfall culverts. Cowardin RIVERINE Upper Perennial, Intermittent Streambed, Cobble-gravel Seasonally Flooded, Fresh BOUNDARY DELINEATION The boundaries of these streams are the edges of a well-defined scour channel. Associated Palustrine wetlands do not occur along these streams within the proposed project footprint. APPENDIX I: EAST AND WEST STREAMS 4 EAST AND WEST WETLANDS IN-PIT SOILS DATA FORM Map Unit Name: Everett Gravely Sandy Loam 5-15% Drainage Class: SED ROUTINE ONSITE DETERMINATION METHOD (Series&Phase) (WA State Wetland Delineation or 1987 Corps Wetland Delineation Manual) Taxonomy(subgroup): Project/Site: Alderbrook/SR106 Date: 25 May 2002 Field observations confirm mapped type? Unconfirmed Applicant/Owner: Pat McCullough County: Mason State: WA Profile Description Field Investigatior(s): S. Shanewise S/T/R: 33/22/3 W Depth Horizon Matrix color Mottle colors Mottle abundance Texture/ Drawing of soil Do Normal Circumstances exist at the site?Yes Community ID: 1-IN (inches) (Munsell) (Munsell) size/contrast structure,etc. profile(match description) Is the site significantly disturbed? No Transect ID: 0-12 10YR2/1 none Is the area a potential Problem Area? No Plot ID: Explanation of atypical or problem area: VEGETATION Dominant Plant Species Indicator Stratum 1. Lysichiton americanum OBL H 2. Pteridium aquilinum FACU H 3.Alnus rubra FAC T Hydric Soil Indicators Gleyed or Low-Chroma 4.Rubus spectabilis FAC S Hydric soils present. Yes Rationale for decision/Remarks: 1 chroma HYDROPHYTIC VEGETATION INDICATORS: WETLAND DETERMINATION Percent of dominant species that are OBL,FACW,and/or FAC: >50% Hydrophytic vegetation present? Yes Indicators that apply: Hydric Soils present? Yes Regional knowledge of plant communities: X Wetland plant list: X Wetland Hydrology present? Yes Is Sampling Point within a wetland?Yes Physiological/reproductive adaptations: Morphological adaptations: Rationale/Remarks: Positive for all 3 parameters Technical Literature: Wetland plant Data Base: Other: NOTES: Hydrophytic vegetation present? Yes Rationale/Remarks: Dominant spp.FAC and wetter. HYDROLOGY Saturated in Upper 12" Is it the growing season?: Yes Based on:May Depth to free water in pit:4" Depth to saturated soil:0" Wetland hydrology present?Yes Rationale/Remarks: Approved hydrology indicators present THE COOT COMPANY WOUAW a"w1mlire std.0 EAST AND WEST WETLANDS OUT-PIT SOILS DATA FORM Map Unit Name: Everett Gravely Sandy Loam 5-15% Drainage Class: SED ROUTINE ONSITE DETERMINATION METHOD (Series&Phase) (WA State Wetland Delineation or 1987 Corps Wetland Delineation Manual) Taxonomy(subgroup): Project/Site:Alderbrook/SR106 Relocation Date:25 May 2002 Field observations confirm mapped type? Unconfirmed Applicant/Owner:Pat McCullough County: Mason State:WA Profile Description Field Investigatior(s): S. Shanewise S/T/R: 33/22/3 W Depth Horizon Matrix color Mottle colors Mottle abundance Texture/ Do Normal Circumstances exist at the site?Yes Community ID: 1-OUT (inches) (Munsell) (Munsell) size/contrast structure,etc. Is the site significantly disturbed? No Transect ID: 0-12 10YR3/2 none Is the area a potential Problem Area? No Plot ID: Explanation of atypical or problem area: VEGETATION Dominant Plant Species Indicator Stratum 1.Polystichum munitum FACU H 2. Rubus spectabilis FAC S 3.Alnus rubra FAC T Hydric Soil Indicators 4. Gaultheria shallon FACU S None Hydric soils present?No Rationale for decision/Remarks: 2 chroma no mottles HYDROPHYTIC VEGETATION INDICATORS: Percent of dominant species that are OBL,FACW,and/or FAC: 50% WETLAND DETERMINATION Indicators that apply: Hydrophytic vegetation present?Yes Regional knowledge of plant communities: X Wetland plant list: X Hydric Soils present? No Physiological/reproductive adaptations: Morphological adaptations: Wetland Hydrology present?No Is Sampling Point within a wetland?No Technical Literature: Wetland plant Data Base: Rationale/Remarks:Negative for two of three parameters Other: Hydrophytic vegetation present? yes NOTES: Rationale/Remarks: 50%FAC-U HYDROLOGY None Depth to saturated soil:>12" Wetland hydrology present? No Rationale/Remarks:No presence or indication of wetland hydrology. TIE COOT COMPANY Nsth"ud WIYIIG ntot*& Washington Dept. of Ecology 2a2• Is there an area of organic soil which has an emergent class with at least one species from Table 2,and cover of invasive species is<I0%?(See Table 3) Wetlands Rating Field Data Form Is the area of herbaceous plants and deep ❑YES:Category I Cowl organic soils>1/2 acre? Is the area of herbaceous plants and deep ❑YES:Category 11 Background Information: organic soils 1/4-1/2 acre? ❑NO:Go to 2a.3 e of Rater: Steve Shanewise Affiliation:The Coot Co. 20.Is the vegetation a mixture of only herbaceous plants and Sphagnum mosses 25 May 2002 with no scrub/shrub or forested classes? Is the area of herbaceous plants,Sphagnum and deep ❑YES:Category I Name of Wetland: SR106 Relocation East and West Wetland organic soils>1/2 acre? Govt.Jurisdiction Is the area of herbaceous plants,Sphagnum and deep ❑YES:Category 11 Location: 1/4 S: of 1/4 S: organic soils 1/4-1/2 acre? ❑NO:Go to Q.3. Section: 33 Township: 22N Range: 3W Q2b. Mature forested wetland. Sources of Information: (Check all sources that apply) 2b.1.Does 50%of the cover of upper forest canopy consist ❑YES:Category 1 Site visit[H] USGS Topo Map❑x NWI Map❑x Aerial PhotOE l of evergreen trees older than 80 years of age or deciduous ❑NO:Go to 2b.2 Soil survey❑X Other Info. trees older than 50 years? Wetland 2b.2.Does 50%of the cover of forest canopy consist ❑YES:Go to 2b.3 of evergreen trees older than 50 years,AND is the ❑NO:Go to Q.3 Category III Point Tota=16 structural diversity of the forest high(as listed p.231)? 2b.3.Does<25%of the area cover in herbaceous/ ❑YES:Category I Q. 1. High Quality Natural Wetland groundcover or shrub layer consist of invasive/exotic ❑NO:Go to Q.3 Answer this question if you have adequate information or experience to do so. If species from list? not,find someone with the expertise to answer the questions.If the answer to Q.2c.Estuarine wetlands questions la,lb,and lc are all NO,contact the Natural Heritage Program of DNR. 2c.1.Is the wetland listed as a National Wildlife Refuge, ❑YES:Category I National Park,National Estuary Reserve,Natural Area ❑NO:Go to 2c.2 la.Human caused disturbances. Preserve,State Park,or Educational,Environmental or Is there significant evidence of human-caused changes to topography or hydrology Scientific Reserve designated under WAC 332-30-151? of the wetland as indicated by any of the following conditions? Consider only changes that may have taken place in the last 5 decades. 2c.2.Is the wetland>5 acres ❑YES:Category I o Note:if an area contains patches of salt tolerant 1 al.Upstream watershed>12/o impervious. ❑YES:go to Q.2 vegetation that are 1)less than 600 feet apart and that are 1a2.Wetland is ditched and water flow is not obstructed. ❑YES:go to Q.2 separated by mudflats that go dry on a Mean Low Tide, 1a3.Wetland has been graded,filled,logged. El YES:go to Q.2 or 2)separated by tidal channels that are less than 100 1 a4.Water in wetland is controlled by dikes,weirs,etc. ❑YES:go to Q.2 feet wide;all the vegetated areas are to be considered 1a5.Wetland is grazed. ❑YES:go to Q.2 together in calculating the wetland area. Other indicators of disturbance(list below) ❑YES:go to Q.2 or is the wetland 1-5 acres ❑ YES:Go to 2c.3 ❑NO:go to lb. or is the wetland<1 acre? ❑ YES:Go to 2c.4 2c.3.Does the wetland meet at least 3 ❑ YES:Category I of the following 4 criteria: ❑ NO:Category 11 lb.Are there populations of non-native plants which are ❑YES:go to Q.2 -Minimum existing evidence of human related disturbance(as listed p.281); currently present,cover more than 10%of the wetland, ❑NO:go to 1 c. -Surface water connection with tidal saltwater or tidal freshwater; and appear to be invading native populations? -At least 75%of the wetland has a 100'buffer of ungrazed pasture, Briefly describe any non-native plant sources and open water,shrub or forest; information source(s) -has at least 3 of the following features:low marsh,high marsh, tidal channels,lagoon(s),woody debris;or contiguous freshwater wetland. ic.Is there evidence of human-caused disturbance which ❑YES:go to Q.2. 2c.4.Does the wetland meet all of the four criteria ❑ YES:Category Il has visibly degraded water quality? If so,describe. ❑NO:Possible under 2c.3.above? ❑ NO:Category III Cat.1,contact DNR Q.2. Irreplaceable Ecological Functions: Q•2d.Eel Grass and Kelp Beds. Does the wetland: ONO to all:go to Q3 2d.1.Are eel grass beds present? ❑YES:Category I Have at least 1/4 acre of organic soils deeper than ❑YES go to 2a ❑NO:go to 2d.2. 16 inches and the wetland is relatively undisturbed;OR 2d.2.Are there floating or non floating kelp bed(s)present ❑YES:Category 1 (If NO because of disturbance,describe): Indicators of disturbance may include: with greater than 50%macro algal cover in the month ❑NO:Category 11 -Wetland has been graded,filled,logged: of August or September? Organic soils on the surface are dried out for more than half the year: Q.3. Category IV wetlands. Wetland received direct urban or agricultural stormwater runoff; 3a.Is the wetland:less than 1 acre,and ❑YES:Category IV OR have a forested class greater than 1 acre; ❑YES:Go to 2b hydrologically isolated,and ❑O NO:go to 3b OR have characteristics of an estuarine system; ❑YES:Go to 2c comprised of one vegetated class dominated(>80%areal cover) OR have eel grass,kelp beds? ❑YES:Go to 2d by one species from Tables 3(p. 19) or 4(p.20)? 3b.Is the wetland:less than 2 acres and ❑YES:Category IV 2a.Bogs and Fens hydrologically isolated,with one vegetated class,and ©NO:go to 3c y of the 3 following conditions met for the area of organic soil? >90%of cover is any combination of species from Table 3? re Sphagnum mosses a common ground cover(>30%) 3c.Is the wetland excavated from upland AND a pond ❑YES:Category IV cover of invasive species(see Table 3)less than 10%? <1 acre without a surface water connection to IM NO:go to Q.4 Is the area of Sphagnum mosses and streams,lakes,rivers,or other wetland,and has<.1 acre of vegetation? deep organic soils>1/2 acre? ❑YES:Category I Is the area of Sphagnum mosses and deep organic soils 1/4-1/2 acre? ❑YES:Category 11 0 NO:Go to 2a.3 f Q.4. Significant habitat value. 4f.Habitat features Answer all questions and enter data requested. -Is there evidence that open or standing water 4a.Total wetland area: Check box that qualifies was caused by beavers? ❑YES-2 Acres Points Is a heron rookery located within 300 feet? ❑YES-1 Estimate area,select from choices at right: ❑ >200 6 Are raptor nest/s located within 300 feet? ❑YES-1 ❑ 40-200 5 Are there at least 3 snags per acre>10 in.DBH? ❑YES-1 Vetland acreage: ❑ 10-40 4 Are there at least 3 downed logs per acre with ❑ 5-10 3 diameter greater than 6 inches for at least Source: ❑ 1-5 2 10 feet in length? ❑O YES-I X 0.1-1 1 Are there areas within the wetland that are ponded for ❑ <0.1 0 at least 4 months of the year,and the wetland has not qualified as having an open water class in Question 4b? ❑YES-2 4.b.Wetland Classes: 4g. Connection to streams(score one only) BOLD the classes below that qualify: #of classes Points 4g.1 Does the wetland provide habitat for fish at any time of Open water:if the area of open water is>1/4 acre, O One class 0 year AND does it have a perennial surface water Aquatic beds:if the area of aquatic beds>1/4 acre. ❑Two classes 3 connection to a fish bearing stream? ❑YES-6 Emergent:if the area of emergent class is>1/4 acre ❑Three classes 6 4g.2.Does the wetland provide fish habitat seasonally AND Scrub-shrub:if the area of scrub-shrub class is>1/4 acre ❑Four classes S does it have a seasonal surface water connection Forested:if area of forested class is>1/4 acre. ❑Five classes 10 to a fish-bearing stream? ❑YES-4 4g.3.Does the wetland function to export organic matter 4c.Plant species diversity through a surface water connection at all times of For each wetland class that qualifies in 4b above,count the the year to a perennial stream? ❑YES-4 number of different plant species covering more than 5% 4g.4.Does the wetland function to export organic of the ground.You do not have to name them. #of matter through a surface water connection to Class Species Points a stream on a seasonal basis? ❑O YES-2 Aquatic Bed ❑ 1 0 ❑ 2 1 4h.Buffers. Score the existing buffers based on the following descriptions. If the Score at right. ❑ 3 2 condition of the buffers do not exactly match the description,score a point higher ❑ >3 3 or lower depending on whether buffers are more or less degraded. Note:Any plant species with a Forest,scrub,native grassland,or open water buffers are present cover of>5%qualifies for points Emergent ❑ 1 0 for more than 100 feet around 95%of the circumference. ❑YES- 5 within a class,even those that ❑ 2-3 1 -Forest,scrub,native grassland,or open water buffers wider than are not of that class. ❑ 4-5 2 100 ft for more than 1/2 of the wetland circumference,or same buffers wider than 50 ft around 95%of the ❑ >5 3 circumference? ❑O YES- 3 Forest,scrub,native grassland,or open water buffers wider Scrub-Shrub ❑ 1 0 than 100 feet for more than 1/4 of the wetland circumference, ❑ 2 1 or same buffers wider than 50 feet around 1/2 of the ❑ 3-4 2 circumference? ❑YES-2 ❑ >4 3 No roads,buildings,or paved areas within 100 ft of the wet- land for more than 95%of the wetland circumference? ❑YES-2 Forested ❑ 1 0 -No roads,buildings,or paved areas within 25 ft of the ❑ 2 1 wetland for more than 95%of the circumference,OR ❑ 34 2 no roads buildings or paved areas within 50 feet of the ❑x >4 3 wetland for more than 1/2 of the wetland circumference. ❑YES-1 Paved areas,industrial areas,or residential construction 4d.Structural diversity (w/less than 50'between houses)are less than 25'from If the wetland has a forested class,add 1 point if each of the following classes the wetland for more than 95%of the circumference? ❑YES- 0 is present within the forested class and is larger than 1/4 acre: Trees>50'tall ❑YES-I 4i.Connection to other habitat areas: Trees 2049'tall ❑O YES-1 Select the description which best matches the site being evaluated. Shrubs O YES-1 Is the wetland connected to,or part of,a riparian corridor Herbaceous ground cover ❑O YES-1 at least 100'wide connecting two or more wetland,OR, is there an upland connection present>100'wide with Add I point if there is any open water or aquatic bed class immediately next good forest or shrub cover(>25%)connecting it with to forested area: ❑YES-1 a Significant Habitat Area? ❑YES-5 Is the wetland connected to any other Habitat Area with 4e.Interspersion:high,moderate,low,or none? either 1)a forested/shrub corridor<100'wide,OR 2)a corridor that is>100'wide,but has a low ❑High-5 vegetative cover<6'in height? El YES-3 ❑Moderate-3 Is the wetland connected to,or part of,a riparian corridor o : ❑Low-1 between 50-100'wide with scrub/shrub or forest cover El None-0 connection to other wetlands? ❑YES-3 �°" Is the wetland connected to any other Habitat Area with narrow corridor(<100')of low vegetation(<6'in height)?❑YES-1 -Is the wetland and its buffer(if the buffer is<50'wide) completely isolated by development (urban,residential,or industrial)? ❑YES-0 Add scores circles for Q5a-Q51 above to get a total. Wetland Is total greater than or equal to 22 points? ❑ YES-Category II 16 points ❑x NO-Category III REFERENCE Catalog of Washington Streams and Salmon Utilization,A, Volume 1 and Volume 2 (1975)Washington Department of Fisheries. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979, Reprinted 1992. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Fish and Wildlife Service, FWS/OBS-79/31, 103 pp. Federal Interagency Committee for Wetland Delineation. 1989. Federal Manual for Identifying and Delineating Jurisdictional Wetlands. U.S. Army Corps of Engineers,U.S. Environmental Protection Agency, U.S. Fish and Wildlife Service, and U.S.D.A. Soil Conservation Service, Washington, D.C. Cooperative technical publication. 76 pp. plus appendices. Lewis County. 1996. Lewis County Interim Critical Areas Ordinance. Munsell Color. 1992. Munsell Soil Color Charts. Kollmorgen Corporation. Baltimore, Maryland. National Wetlands Inventory Maps. Circa 1987 - 1989. US Department of the Interior. Reed, P.B. Jr. 1988. National List of Plant Species that Occur in Wetlands: National Summary. USFWS Biological report 88(24). 244 pp. Reed, P.B. Jr. 1993. Northwest Region 9, Supplement to National List of Plant Species that Occur in Wetlands: USFWS U.S.D.A. Soil Conservation Service. 1951. Soil Survey of Mason County, Washington. U.S.D.A. Soil Conservation Service. 76 pp. U.S.D.A. 1991. Hydric Soils of the United States. Washington Department of Ecology. 1997. Washington State Wetland Identification and Delineation Manual. Publication#96-94. Washington Department of Ecology. 1993. Washington State Wetlands Rating System for Western Washington. Publication#93-74. REFERENCES Wetlands Inventory TIE COOT COMPANY Wetland and Wildlife Consulting Services 416 S.Washington Olympia,WA 98501 (360)352-9897 FAX(360)352-9914 WETLANDS INVENTORY FOR THE ALDE"ROOK/SR-106 RELOCATION I S33T22NR3W Mason County MAY 2002 i prepared for: Pat McCullough Engineering Services Associates 210 NE Cherokee Beach Belfair WA 98528 of prepared by: 1 �j 3I S. Shanewise PWS Senior Ecologist MccumyUrpt CONTENTS Figure 1: Vicinity Map Introduction............................................................................1 Methods..................................................................................1 Results....................................................................................2 Discussion..............................................................................3 Figure 2: Alderbrook and Dalby Creek Restoration Project Drawing Figure 3: Soils Map Figure 4: National Wetlands Inventory Map Figure 5: USGS Topography Map Appendix I: Wetland Descriptions Text Data Sheets Category Ratings References -------------------------- BROWNS POINT --- i s -------------------- _ rd i I i ------------------------------------ rm si tYdR9ER aR PROJECT AREA �$e.r 4- CALM COVE s F�Rtir �,3t T Dn omun s' FWunt-N-E �rnh "'PHHC OT S-RUCE `rKkGU° RD 1 AVE OHl1 g0ELE � SPrtCE 149?q ST PV�K 3T NE� c re a �jC1PlESRRO HARVON HULL L 6L1C7N` LLhI N pALBY RD T22N rth r.s n x a ccx1;4,7Y,pALDFRBWOK S33T22R3W ALDERBROOK/SR-106 RELOCATION VICINITY MAP T This map has been copied under license N of Roadrunner Maps, copyright 1993. All rights reserved. All locations approximate- CHM MII-/W�i tYYy FIGURE 1 DISCUSSION Divert Wetland Drainage To Alderbrook Creek Hydrology from the two wetlands impacted by the proposed roadway should be directed towards the Alderbrook Creek channel. Maintaining the existing outfall continuity on these two systems is unnecessary due to their minor contributions and distant connection to Puget Sound through several hundred feet of culvert. Habitats Fully Regulated All streams and wetland impacted by this proposed realignment are fully regulated through local, state and federal laws. Habitat size and area of impact both exceed minimum standards for engaging jurisdictional controls. Stream Enhancement Excellent Mitigation The proposed stream enhancement project for Alderbrook and Dalby Creeks is more than adequate mitigation compensation for the roadway realignment impacts. Total roadway impacts are only a few thousand square feet, with most of this occurring in small, low value wetlands. Restoring Alderbrook and Dalby Creeks to anadromous fish runs will immensely improve the overall environment here well beyond the minor impacts that will occur. Detailed Wetland/Stream Descriptions Three separate wetland areas were identified for this project. However, two of these three wetlands have very similar habitat conditions due to topography, groundwater and past disturbances. Therefore, a single, detailed wetland description has been provided covering the two similar habitats, plus another for the third, dissimilar site. The wetland numbering corresponds with the data sheets and category ratings also provided in the Appendix. INTRODUCTION This report documents the wetland and stream conditions along a .5-mile road realignment project for SR-106 on Hood Canal. The realignment action is primarily driven by safety concerns, but it will also facilitate a major stream restoration project along Alderbrook and Dalby Creeks. Current road crossings of these two systems prevent anadromous fish access to 95% of the available watershed within both streams. Stream channel enhancement will also occur to provide high quality spawning and rearing habitat. In addition to these two primary streams, one small Type 5 drainage and two minor slope seepage wetlands occur within the proposed realignment path. Mitigation for all stream and wetland impacts will be compensated through the proposed stream enhancement project. METHODS Site Inspection Field review of the project was performed on 25 May 2002. The centerline of the proposed realignment was staked, and field review centered on undeveloped areas within 150-200 feet of the centerline. Alderbrook and Dalby Creeks Excluded Detailed stream/wetland information for these two systems is not included within this report. Information on these streams has been provided within the restoration documents prepared for the enhancement project. The stream enhancement project will be authorized under a NWP#27. The road realignment project will be authorized under a NWP #14. Only the area of stream impact for Dalby and Alderbrook Creeks is included within this document. Wetland Classification Wetland characteristics are described within this report according to the Fish and Wildlife Service Cowardin Classification System (1989). Wetland Delineation Wetland delineation followed a Routine Methodology based upon the Washington State Wetland Identification and Delineation Manual (1997) requiring positive indicators for wetland soil, hydrology, and plants: Wetland hydrology was determined by water conditions in pits; ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 1 Presence of hydric soil was determined by soil conditions in pits dug around suspected wetlands. Soil inspection included comparison with the Munsell Color Charts (1992). General soil characteristics were derived from information contained within the Soil Survey of Mason County, Washington. U.S.D.A. Soil Conservation Service(1951). Occurrence of wetland vegetation was determined through species identification, estimation of dominance and then assignment of wetland indicator status; indicator status was assigned based upon the National List of Plant Species That Occur In Wetlands(1989). Wetland Category Rating The Washington State Wetlands Rating System for Western Washington (1993)was used to establish Category Ratings for the wetlands. Confirmation Wetland status depicted in this report has not been confirmed by a government official,and therefore has no legal status. Agencies with jurisdictional authority over wetlands at the local,state and federal level need to be consulted for their signed agreement to our findings before there is any guarantee of no change. Our estimation for the accuracy of the unconfirmed wetland boundaries portrayed within this report is >95%. RESULTS Variable Topography The proposed road realignment has dramatically different topography between the east and west ends. The east end cuts across a steep slope descending hundreds of feet along the shoreline bluffs common to Hood Canal. However, at the point where Alderbrook Creek is crossed, topography then flattens to gently sloped ground from here to the project's western terminus. The wetlands and stream described within this report all occur within the eastern, steep-sloped part of the proposed new roadway. Minor Hillside Seeps The two, small wetland systems that occur along the realignment are minor, hillside seeps. Surface water is restricted to flows artificially consolidated by human caused alterations to the ground surface. Soil saturation is caused by daylighting groundwater, and appears to occur at many locations along the uphill wetland boundary. Both wetlands have downslope terminuses where hydrology seeps subsurface again and soil saturation ceases. Minor outlet channels that drain from the downslope points on both wetlands also fade from defined channels to vegetated swales that technically lack either stream or wetland conditions. ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 2 Old Dirt Roadway An old dirt roadway was cut across the slope where the two wetlands occur, and this roadway now intercepts most wetland hydrology. Where this roadway occurs, downslope conditions are entirely upland. It seems likely that the past road builders cut their path just below where the wetland seep naturally disappeared, but the hydrology then drained into the flat roadway and created new wetland conditions below where the natural wetlands had previously occurred. Weak Technical Connection To Puget Sound The two slope wetlands technically terminate both wetland and stream conditions prior to their connection with the ditch along SR-106. Water from this ditch drains through culverts and beneath adjacent developed ground before finally reaching Puget Sound } roadside ditch where water flows through culverts to the shoreline of Puget Sound over 200 feet away. Although storm event generated surface flows drain from the wetlands to the roadside ditch during winter, this weak connection to Puget Sound should qualify these sloped wetlands as not associated with tidal waters. Small, Headwater Stream A small, Type 5 stream also occurs along the steep slope near the two minor wetland systems. This system drains to an intake grate at the slope toe where solid pavement begins. From here, the surface flow is culverted west into the Alderbrook Creek channel. Low Value Systems Both the wetlands and stream described here are low value systems with minimal function performance. Water quality benefits from the densely vegetated sloped wetlands are the primary function of these systems. The seasonal stream flows should contribute organic matter to Alderbrook Creek, but the low volumes involved limit the total value of this action. Habitat structures of all three systems are simple, and past disturbances have occurred. Avoidance of these systems by the proposed project is unwarranted, and mitigation compensation requirements should be minimal. Total Impact Area The total areas of impact are provided below for each of the five systems involved with the roadway realignment. SYSTEM IMPACT AREA(ACRES WETLAND 1 .27 WETLAND 2 .11 STREAM A .02 ALDERBROOK CREEK .05 DALBY CREEK .05 TOTAL IMPACT AREA .50 ACRES ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 3 DISCUSSION Divert Wetland Drainage To Alderbrook Creek Hydrology from the two wetlands impacted by the proposed roadway should be directed towards the Alderbrook Creek channel. Maintaining the existing outfall continuity on these two systems is unnecessary due to their minor contributions and distant connection to Puget Sound through several hundred feet of culvert. Stream Enhancement Excellent Mitigation The proposed stream enhancement project for Alderbrook and Dalby Creeks is more than adequate mitigation compensation for the roadway realignment impacts. Total roadway impacts are only a few thousand square feet,with most of this occurring in small, low value wetlands. Restoring Alderbrook and Dalby Creeks to anadromous fish runs will immensely improve the overall environment here well beyond the minor impacts that will occur. Detailed Wetland/Stream Descriptions Three separate wetland areas were identified for this project. However, two of these three wetlands have very similar habitat conditions due to topography, groundwater and past disturbances. Therefore, a single, detailed wetland description has been provided covering the two similar habitats, plus another for the third, dissimilar site. The wetland numbering corresponds with the data sheets and category ratings also provided in the Appendix. ALDERBROOK/SR-106 WETLAND INVENTORY THE COOT COMPANY 4 Alderbrook and Darby. Creek Restoration'.Project Alderbrook Greek RestorMon Area i f •.• Existing culvert locations f 108 •.• Alderbrook •. Resort •-•..,Proposed Road Realign nt Proposed •••.. •• ••• � STREAM A •+•' .11 acres additional culvert •Dalby Road balby WETLAND 1 (Creek �� � .27 acres `( WETLAND 2 Existing Access Road Beach Alderbroo Drive % Creek / N A MAP PROVIDED BY: i 100 0 100 200 300 400 500 600 Feet ENGINEERING SERVICES ASSOCIATES Scale 1:2.500 -- __ May 2002 FIGURE 2 4r 1 "G T y � � * r��• ,_R PROJECT AREAS M1 •ed AU = i,x � •..1�. ,� i i � �' y j�X�bi�i.:1' +'�4y s:j � z A' r 7 jr } s S33T22NR3W Sheet#10 ALDERBROOK/SR-106 RELOCATION SOILS MAP Partial Legend Eh = Everett gravelly sandy loam, 5-15%slopes T Ac = Alderwood gravelly sandy loam, 15-30%slopes N Scale 1:31680 Soil Survey of Mason County Soil Conservation Service THE WCO -All locations approximate- FIGURE 3 • E1p etettt l l_Y 1 PEMIY B L' psstY ' y 'p55tY� SEiy v fls51Y POWZ �( P `t' 61Y 31L�Sa * fPnr[ J e+ 1 PF01Y �tow���....-� ,,,.- R•95BY.-1 Y �ea21'+-�a �PEr'�w t - x�.�n..sa V..:• PtzMSw � + 41StSY J i ZE fi �69ty b w 1G •� 12t � � ,�'� l � � r t PROJECT �,, s '- AREA s;zte,.P f t� a E2 AWN 3. POHtz - -, � PSSIY AI39Z>,�v ; A456Y Wd Pf31F� ,,` {. P551 y $MtW4 k LY PSS(r � 4BHttwh 4�< — - £lt1tP •1 n.� PEtit1Y PE_Wy RfOWY. P55r1Y R PS IY g, n, PEM11! i �SS��+.�� . S33T22NR3W Potlatch, WASH Mason County ALDERBROOK/SR-106 NATIONAL WETLANDS INVENTORY MAP T N US Department of Interior Fish and Wildlife Service Prepared by National Wetlands Inventory Scale 1:62500 1987 -All locations approximate- FIGURE 4 40 i� .4Nt!/7 j r'7 A r Painta P�OJECT o`er' A EA If. 2� b� s2 9 /i — a f Ot'er S33T22NR3W ALDERBROOK/SR-106 RELOCATION USGS TOPOGRAPHY MAP T N Scale 1:2,500 ©2000 National Geographic Holdings , • THE OOTuI i11W W tON4 tYlyr -All locations approximate- FIGURE 5 APPENDIX I TO WETLANDS INVENTORY FOR THE ALDERBROOK/SR-106 RELOCATION WETLANDS WETLANDS I and 2 NOTE: This wetland description is applicable to Wetland 1 and Wetland 2. LANDSCAPE POSITION: Hood Canal Watershed These wetlands are Slope systems set near the toe of the large bluffs descending to Hood Canal. Although these wetlands attain at least a temporary surface water connection through culverts to Puget Sound, this connection is weak, and most likely the result of the construction of SR 106. These wetlands should not be deemed adjacent to tidal waters. CLASSIFICATION These wetlands are small, forested seeps covered with young regrowth red alder(Alnus rubra) and a dense herbaceous layer of skunk cabbage (Lysichiton americanum) and bracken fern (Pteridium aquilinum). Hydrology results from groundwater daylighting against a shallow till layer. These seeps disappear downslope where the till stops and is replaced by pervious sand and gravels that drain the water subsurface. Past construction of a dirt road has altered native ground conditions by intercepting hydrology and probably expanding the footprint of technical wetland conditions. Small, short"stream" channels occur at the downslope terminuses of each wetland that quickly fade to ill- defined, vegetated, nonwetland swales. Cowardin Dominant Vegetation PALUSTRINE Alnus rubra Forested,broad leaved deciduous Rubus spectabilis Saturated, fresh Lysichiton americanum Mineral Pteridium aquilinum BOUNDARY DELINEATION These wetland boundaries are generally indistinct edges that meander through the landscape moving across a wide range of topographic elevation. Some mosaic conditions occur on slight rises, or where subsurface sand lenses likely occur(HartCrowser 16 May 2002 Draft Memorandum.) Lack of hydric soils was the most common factor limiting wetland occurrence, even though plants, and sometimes hydrology, were still positive. Following careful review and analysis of site conditions,boundary flagging basically involved flagging in all ground that had skunk cabbage (Lysichiton americanum) growing from it. APPENDIX I The following table depicts general field indicators used to delineate this wetland boundary: WETLAND UPLAND Lysichiton americanum Polystichum munitum 1 chroma 2 chroma Saturated to surface Dry at surface BOTH 41nus rubra Rubus spectabilis Everett Soil Series APPENDIX 2 FUNCTION ASSESSMENT The followingis list of a commonly recognized wetland functions, with an estimated relative value rating for this wetland and a brief conceptual statement regarding the primary factor affecting this rating. A summary table is also provided for quick reference. 0 Z 6 0 Biofiltration MOD Slow percolation of water through dense vegetation and saturated surface soils Groundwater Recharge MOD Subsurface seepage at base of shoreline bluffs along Hood Canal Plant/Animal Habitat Value LOW Low diversity; small si ze;ze, lack of surface water;past disturbances Sediment Capture Surface Water LOW Sloped systems lacking significant Supply depressions or restricted outlets Groundwater Exchange/Recharge LOW Sloped systems lacking significant depressions or restricted outlets Surface Water Runoff Route LOW Small, short,poorly defined surface flow paths Stormwater Detention LOW Sloped systems lacking significant depressions or restricted outlets Flood Attenuation NA Not associated with Riverine system CATEGORY RATING: III (16 points) These wetlands qualify for Category III ratings because they contain a single habitat class and lack high structural diversity. A Category I Mature Forest rating was not possible due to the young age of the trees. APPENDIX 3 STREAM A LANDSCAPE POSITION: Alderbrook Creek and Hood Canal Watersheds This small stream is situated along the base of the steep slopes descending towards Hood Canal from the surrounding bluffs. The stream connects through a culvert to Alderbrook Creek within 300 feet of Hood Canal. CLASSIFICATION This stream is a small,headwater system with a total length of probably a few hundred feet. The channel averages a foot in width and has a well-defined, slightly incised scour indicative of the fast, flashy flows that should occur during storm events. Fish do not occur, and access to the channel is blocked by the outfall culvert that drains from a catch basin that intercepts the stream flow. Cowardin RIVERINE Upper Perennial, Intermittent Streambed, Cobble-gravel Seasonally Flooded, Fresh BOUNDARY DELINEATION The boundaries of this stream are the edges of a well-defined scour channel. Associated Palustrine wetlands do not occur along this stream within the proposed project footprint. II ; I ; I ,I 0 � I y I APPENDIX 4 J WETLAND 1 and 2 IN-PIT SOILS DATA FORM Map Unit Name: Everett Gravely Sandy Loam 5-15% Drainage Class: SED ROUTINE ONSITE DETERMINATION METHOD (Series&Phase) (WA State Wetland Delineation or 1987 Corps Wetland Delineation Manual) Taxonomy(subgroup): Project/Site:Alderbrook/SR106 Date: 25 May 2002 Field observations confirm mapped type? Unconfirmed Applicant/Owner: Pat McCullough County: Mason State:WA Profile Description Field Investigatior(s): S. Shanewise S/T/R:33/22/3 W Depth Horizon Matrix color Mottle colors Mottle abundance Texture/ Drawing of soil Do Normal Circumstances exist at the site?Yes Community ID: 1-IN (inches) (Munsell) (Munsell) size/contmst structure,etc. profile(match description) Is the site significantly disturbed? No Transect ID: 0-12 10YR2/1 none Is the area a potential Problem Area? No Plot ID: Explanation of atypical or problem area: VEGETATION Dominant Plant Species Indicator Stratum 1.Lysichiton americanum OBL H 2. Pteridium aquilinum FACU H 3.Alnus rubra FAC 'r Hydric Soil Indicators Gleyed or Low-Chroma 4.Rubus spectabilis FAC S Hydric soils present?Yes Rationale for decision/Remarks: 1 chroma HYDROPHYTIC VEGETATION INDICATORS: WETLAND DETERMINATION Percent of dominant species that are OBL,FACW,and/or FAC:>50% Hydrophytic vegetation present? Yes Indicators that apply: Hydric Soils present? Yes Regional knowledge of plant communities: X Wetland plant list: X Wetland Hydrology present? Yes Is Sampling Point within a wetland?Yes Physiological/reproductive adaptations: Morphological adaptations: Rationale/Remarks:Positive for all 3 parameters Technical Literature: Wetland plant Data Base: Other: NOTES: Hydrophytic vegetation present? Yes Rationale/Remarks: Dominant spp.FAC and wetter. HYDROLOGY Saturated in Upper 12" Is it the growing season?: Yes Based on: May Depth to free water in pit:4" Depth to saturated soil: 0" Wetland hydrology present?Yes Rationale/Remarks: Approved hydrology indicators present TeE Cool CLMM a.u..r MW tvtuur.et.wtr WETLAND I and 2 OUT-PIT SOILS DATA FORM Map Unit Name: Everett Gravely Sandy Loam 5-15% Drainage Class: SED ROUTINE ONSITE DETERMINATION METHOD (Series&Phase) (WA State Wetland Delineation or 1987 Corps Wetland Delineation Manual) Taxonomy(subgroup): Project/Site:Alderbrook/SR106 Relocation Date: 25 May 2002 Field observations confirm mapped type? Unconfirmed Applicant/Owner: Pat McCullough County: Mason State: WA Profile Description Field Investigatior(s): S. Shanewise S/T/R: 33/22/3 W Depth Horizon Matrix color Mottle colors Mottle abundance Texture/ Do Normal Circumstances exist at the site?Yes Community ID: 1-OUT (inches) (Munsell) (Munsell) size/connast structure,etc. Is the site significantly disturbed? No Transect ID: 0-12 10YR3/2 none Is the area a potential Problem Area? No Plot ID: Explanation of atypical or problem area: VEGETATION Dominant Plant Species Indicator Stratum 1.Polystichum munitum FACU H 2. Rubus spectabilis FAC S 3.Alnus rubra FAC T Hydric Soil Indicators None 4. Gaultheria shallop FACU S Hydric soils present?No Rationale for decision/Remarks:2 chroma no mottles HYDROPHYTIC VEGETATION INDICATORS: Percent of dominant species that are OBL,FACW,and/or FAC: 50% WETLAND DETERMINATION Indicators that apply: Hydrophytic vegetation present?Yes Regional knowledge of plant communities:X Wetland plant list: X Hydric Soils present? No Physiological/reproductive adaptations: Morphological adaptations: Wetland Hydrology present?No Is Sampling Point within a wetland?No Technical Literature: Wetland plant Data Base: Rationale/Remarks:Negative for two of three parameters Other: Hydrophytic vegetation present? yes NOTES: Rationale/Remarks: 50%FAC-U HYDROLOGY None Depth to saturated soil:>12" Wetland hydrology present? No Rationale/Remarks:No presence or indication of wetland hydrology. THE SOOT CAMPAN Matlad and MlNltk nk"& Washington Dept. of Ecology organic soils 1/4-1/2 acre? ❑NO:Go to 2a.3 2a3.Is the vegetation a mixture of only herbaceous plants and Sphagnum mosses with Wetlands Rating Field Data Form no scrub/shrub or forested classes? Is the area of herbaceous plants,Sphagnum and deep ❑YES:Category I organic soils>1/2 acre? Ft-kground Information: Is the area of herbaceous plants,Sphagnum and deep ❑YES:Category 11 to of Rater: Steve Shanewise Affiliation:The Coot Co. organic soils 1/4-1/2 acre? ❑NO:Go to Q.3. 25 May 2002 Q2b. Mature forested wetland. 2b.1.Does 50%of the cover of upper forest canopy consist ❑YES:Category I Name of Wetland: SR106 Relocation Wetland 1 and 2 of evergreen trees older than 80 years of age or deciduous ❑NO:Go to 2b.2 Govt.Jurisdiction trees older than 50 years? Location: 1/4 S: of 1/4 S: 2b.2.Does 50%of the cover of forest canopy consist ❑YES:Go to 2b.3 Section: 33 Township: 22N Range: 3 W of evergreen trees older than 50 years,AND is the ❑NO:Go to Q.3 structural diversity of the forest high(as listed p.231)? Sources of Information: (Check all sources that apply) 2b.3.Does<25%of the area cover in herbaceous/ ❑YES:Category I Site visit© USGS Topo Mapl] NWI Maplx] Aerial Photo© groundcover or shrub layer consist of invasive/exotic ❑NO:Go to Q.3 Soil stove I] Other Info. species from list'' Wetland Q.2c.Estuarine wetlands 2c.1.Is the wetland listed as a National Wildlife Refuge, ❑YES:Category I Category III Point Total 16 National Park,National Estuary Reserve,Natural Area ❑NO:Go to 2c.2 Preserve,State Park,or Educational,Environmental or Q. 1. High Quality Natural Wetland Scientific Reserve designated under WAC 332-30-151? Answer this question if you have adequate information or experience to do so. If not, 2e.2.Is the wetland>5 acres ❑YES:Category I find someone with the expertise to answer the questions.If the answer to questions 1 a, Note:if an area contains patches of salt tolerant vegetation I b,and 1 c are all NO,contact the Natural Heritage Program of DNR that are 1)less than 600 feet apart and that are separated by mudflats that go dry on a Mean Low Tide,or 2)separated 1 a.Human caused disturbances. by tidal channels that are less than 100 feet wide;all the Is there significant evidence of human-caused changes to topography or hydrology of vegetated areas are to be considered together in calculating the wetland as indicated by any of the following conditions? Consider only changes the wetland area. that may have taken place in the last 5 decades. or is the wetland 1-5 acres ❑ YES:Go to 2c.3 1 a1.Upstream watershed>12%impervious. ❑YES:go to Q.2 or is the wetland<1 acre? ❑ YES:Go to 2c.4 1a2.Wetland is ditched and water flow is not obstructed. ❑YES:go to Q.2 2c.3.Does the wetland meet at least 3 ❑ YES:Category I I a3.Wetland has been graded,filled,logged. ©YES:go to Q.2 of the following 4 criteria: ❑ NO:Category II 1a4.Water in wetland is controlled by dikes,weirs,etc. ❑YES:go to Q.2 -Minimum existing evidence of human related disturbance(as listed p.281); 1 a5.Wetland is grazed. ❑YES:go to Q.2 -Surface water connection with tidal saltwater or tidal freshwater, Ia6.Other indicators of disturbance(list below) ❑YES:go to Q.2 -At least 75%of the wetland has a 100'buffer ofungrazed pasture, ❑NO:go to lb. open water,shrub or forest; -has at least 3 of the following features:low marsh,high marsh, tidal channels,lagoon(s),woody debris;or contiguous freshwater wetland. I b.Are there populations of non-native plants which are ❑YES:go to Q.2 2c.4.Does the wetland meet all of the four criteria ❑ YES:Category II currently present,cover more than 10%of the wetland, ❑NO:go to lc. under 2c.3.above? ❑ NO:Category III and appear to be invading native populations? Briefly describe any non-native plant sources and Q.2d.Eel Grass and Kelp Beds. information source(s) 2d.1.Are eel grass beds present? ❑YES:Category I ❑NO:go to 2d.2. 1 c.Is there evidence of human-caused disturbance which ❑YES:go to Q.2. 2d.2.Are there floating or non floating kelp bed(s)present ❑YES:Category I has visibly degraded water quality? If so,describe. ❑NO:Possible Cat.1, with greater than 50%macro algal cover in the month ❑NO:Category Il contact DNR of August or September? 0.2. Irreplaceable Ecological Functions: Q.3. Category IV wetlands. Does the wetland: ❑O NO to all:go to Q3 Have at least 1/4 acre of organic soils deeper than ❑YES go to 2a 16 inches and the wetland is relatively undisturbed;OR 3a.Is the wetland:less than 1 acre,and ❑YES:Category IV (If NO because of disturbance,describe): hydrologically isolated,and El NO:go to 3b Indicators of disturbance may include: comprised of one vegetated class dominated(>80%areal cover) -Wetland has been graded,filled,logged: by one species from Tables 3(p.19) or 4(p.20)? -Organic soils on the surface are dried out 3b.Is the wetland:less than 2 acres and ❑YES:Category IV for more than half the year: hydrologically isolated,with one vegetated class,and Ox NO:go to 3c -Wetland received direct urban or agricultural >90%of cover is any combination of species from Table 3? stormwater runoff 3c.Is the wetland excavated from upland AND a pond ❑YES:Category IV OR have a forested class greater than 1 acre; ❑YES:Go to 2b <I acre without a surface water connection to O NO:go to Q.4 OR have characteristics of an estuarine system; ❑YES:Go to 2c streams,lakes,rivers,or other wetland,and has<.1 acre of vegetation? OR have eel grass,kelp beds? ❑YES:Go to 2d 2a.Bogs and Fens Are any of the 3 following conditions met for the area of organic soil? 2a 1.Are Sphagnum mosses a common ground cover(>30%) and the cover of invasive species(see Table 3)less than 10%? rs the area of Sphagnum mosses and seep organic soils>1/2 acre? ❑YES:Category I s the area of Sphagnum mosses and deep organic soils 1/4-1/2 acre? ❑YES:Category II ❑NO:Go to 2a.3 2a2. Is there an area of organic soil which has an emergent class with at least one species from Table 2,and cover of invasive species is<10%?(See Table 3) Is the area of herbaceous plants and deep 0 YES:Category I Q.4. Significant habitat value. 4E Habitat features Answer all questions and enter data requested. Is there evidence that open or standing water was caused by beavers? ❑YES-2 4a.Tota1 wetland area: Check box that qualifies Is a heron rookery located within 300 feet? ❑YES-1 Acres Points 40 Are raptor nesVs located within 300 feet? ❑YES-1 ❑ Estimate area,select from choices at right: ❑ 0- 00 5 5 Are there at least 3 snags per acre>10 in.DBH? ❑YES-1 4 _Are there at least 3 downed logs per acre with • ❑ 5 Wetland acreage: ❑ 50-4-10 3 0 4 diameter greater than 6 inches for at least 10 feet in length? ❑x YES-1 Source: ❑ 1-5 2<0.1 1 0 Are there areas within the wetland that are ponded for ❑ 0. X at least 4 months ofthe year,and the wetland has not qualified as having g an open water class in Question 4b9 ❑YES-2 4.b.Wetland Classes: 4g. Connection to streams(score one only) BOLD the classes below that qualify: #ofclasses Points 4g.1 Does the wetland provide habitat for fish at any time of >. Open water:if the area of open water is>1 A acre, O One class 0 year AND does it have a perennial surface water Aquatic beds:if the area of aquatic beds>1/4 acre. ❑Two classes 3 connection to a fish bearing stream? ❑YES-6 Emergent:if the area of emergent class is> 1/4 acre ❑Three classes 6 4g.2.Does the wetland provide fish habitat seasonally AND Scrub-shrub:if the area of scrub-shrub class is>1/4 acre ❑Four classes 8 does it have a seasonal surface water connection Forested:if area of forested class is>1/4 acre. ❑Five classes 10 to a fish-bearing stream? DYES-4 4g.3.Does the wetland function to export organic matter 4c.Plant species diversity through a surface water connection at all times of For each wetland class that qualifies in 4b above,count the the year to a perennial stream? ❑YES-4 number ofdifferent plant species covering more than 5% 4g.4.Does the wetland function to export organic of the ground.You do not have to name them. #of matter through a surface water connection to Class Species Points a stream on a seasonal basis? O YES-2 Aquatic Bed ❑ 1 0 ❑ 2 1 4h.Buffers. Score the existing buffers based on the following descriptions. If the Score at right. ❑ 3 2 condition ofthe buffers do not exactly match the description,score a point higher or ❑ >3 3 lower depending on whether buffers are more or less degraded. Note:Any plant species with a -Forest,scrub,native grassland,or open water buffers are present rc cover of>5%qualifies for points Emergent ❑ 1 0 for more than 100 feet around 95%ofthe circumference. ❑YES- 5 within a class,even those that ❑ 2-3 1 -Forest,scrub,native grassland,or open water buffers wider than are not of that class. ❑ 4-5 2 100 ft for more than 1/2 of the wetland circumference,or ❑ >5 3 same buffers wider than 50 ft around 95%ofthe circumference? OYES- 3 er' Scrub-Shrub ❑ 1 0 -Forest,scrub,native grassland,or open water buffers wider ❑ 2 1 than 100 feet for more than 1/4 of the wetland circumference, ❑ 34 2 or same buffers wider than 50 feet around 1/2 ofthe ❑ >4 3 circumference? ❑YES-2 -No roads,buildings,or paved areas within 100 ft ofthe wet- Forested ❑ 1 0 land for more than 95%ofthe wetland circumference? ❑YES-2 ❑ 2 1 -No roads,buildings,or paved areas within 25 ft of the ❑ 34 2 wetland for more than 95%ofthe circumference,OR OO >4 3 no roads buildings or paved areas within 50 feet of the wetland for more than 1/2 ofthe wetland circumference. ❑YES-1 4d.Structural diversity -Paved areas,industrial areas,or residential construction If the wetland has a forested class,add 1 point if each ofthe following classes (w/less than 50'between houses)are less than 25'from is present within the forested class and is larger than 1/4 acre: the wetland for more than 95%ofthe circumference? ❑YES- 0 Trees>50'tall ❑YES-1 Trees 2049'tall IXI YES-1 4i.Connection to other habitat areas: Shrubs O YES-1 Select the description which best matches the site being evaluated. Herbaceous ground cover [XI YES-1 Is the wetland connected to,or part of�a riparian corridor at least 100'wide connecting two or more wetland,OR, Add I point ifthere is any open water or aquatic bed class immediately next is there an upland connection present>100'wide with to forested area: ❑YES-i good forest or shrub cover(>25%)connecting it with 4e.lnterspersion:high,moderate,low,or none? a Significant Habitat Area? OYES-5 Is the wetland connected to any other Habitat Area with ❑High-5 either I)a forested/shrub corridor<100'wide,OR ❑Moderate-3 2)a corridor that is>100'wide,but has a low ❑Low-I vegetative cover<6'in height? 0 YES-3 Is the wetland connected to,or part of a riparian corridor i El None-0 between 50-100'wide with scrub/shrub or forest cover connection to other wetlands? ❑YES-3 Is the wetland connected to any other Habitat Area with narrow corridor(<100')of low vegetation(<6'in height)?❑YES-1 -Is the wetland and its buffer(if the buffer is<50'wide) completely isolated by development modmk Nth (urban,residential,or industrial)? ❑YES-0 Add scores circles for QSa-Q51 above to get a total. Wetland Is total greater than or equal to 22 points? ❑ YES-Category II 0 16 points 0 NO-Category III REFERENCES Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979, Reprinted 1992. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Fish and Wildlife Service, FWS/OBS-79/31, 103 pp. Munsell Soil Color Charts. 2000 ed. Gretag Macbeth,New Windsor,NY. National Wetlands Inventory(Map), Potlatch, Washington 1980. US Department of the Interior U.S.D.A. Soil Conservation Service. 1951. Soil Survey of Mason County, Washington. i U.S.D.A. Soil Conservation Service. 76 pp. Washington Department of Ecology. 1997. Washington State Wetland Identification and Delineation Manual. Publication#96-94. Washington Department of Ecology. 1993. Washington State Wetlands Rating System for Western Washington. Publication#93-74.