7702 RAINIER DR 2022-04-05 - Laserfiche WebLink

• Wetland name or number A Wetland name or number A - • S Slope Wetlands Points S Slope Wetlands Points WATER QUALITY FUNCTIONS - Indicators that the wetland unit functions to (°' t'°'° HYDROLOGIC FUNCTIONS - Indicators that the wetland unit functions to (only'1COfe improve water quality per box) reduce flooding and stream erosion °°box) S S 1.Does the wetland unit have the potential to improve water quality? (see p.64) S 3.Does the wetland unit have the potential to reduce flooding and stream (see p.6R) erosion? S S 1.1 Characteristics of average slope of unit: S S 3.1 Characteristics of vegetation that reduce the velocity of surface flows during stones.❑✓Slope isl%or less(a I%slope has a 1 foot vertical drop in elevation for every 100J1 horizontal distance) points=3 Choose the points appropriate for the description that best fit conditions in the wetland. Slope is 1%-2% points=2 3 (stems of plants should be thick enough(usually>I/81n),or dense enough,to remain []Slope is 2%-5% points=1 _erect during surface flows) Dense,uncut,rigid vegetation covers>90%of the area of the wetland. points=6 3 ❑Slope is greater than 5% points=0 i Dense,uncut,rigid vegetation>1/2 area of wetland points=3 S S 1.2 The soil 2 inches below the surface(or duff layer)is clay or organic (use NRCS Dense,uncut,rigid vegetation>1/4 area points=1 deEtuitions) fl ❑More than 1/4 of area is grazed,mowed,tilled or vegetation is YES=3 points 0 NO=0 points not rigid points=0 S S 1.3 Characteristics of the vegetation in the wetland that trap sediments and pollutants: Figure t S S 3.2 Characteristics of slope wetland that holds back small amounts of flood flows: Choose the points appropriate for the description that best fits the vegetation in the The slope wetland has small surface depressions that can retain water over at least wetland.Dense vegetation means you have trouble seeing the soil surface(>75% 10%of its area. DYES points=2 2 cover),and uncut means not grazed or mowed and plants are higher than 6 inches. ONO points=0 ❑Dense,uncut,herbaceous vegetation>90%of the wetland area points=6 2 S Add the points in the boxes above I 5 I ❑Dense,uncut,herbaceous vegetation>1/2 of area points=3 S 4.Does the wetland have the opportunityto reduce floodingand erosion? (see ©Dense,woody,vegetation>1/2 of area points=2 .S P•70) ❑Dense,uncut herbaceous vegetation>1/4 of area points=1 Is the wetland in a landscape position where the reduction in water velocity it provides ❑Does not meet any of the criteria above for vegetation points=0 helps protect downstream property and aquatic resources from flooding or excessive Aerial photo or map with vegetation polygons and/or erosive flows?Note which of the following conditions apply. M Wetland has surface runoff that drains to a river or stream that has flooding S Total for S I Add the points in the boxes above I 5 L� problems S S 2.Does the wetland unit have the opportunity to improve water quality? (see p.67) ❑Other multiplier Answer YES if you know or believe there are pollutants in groundwater or surface water (Answer NO if the major source of water is controlled by a reservoir(e.g.wetland is a seep 2 coming into the wetland that would otherwise reduce water quality in streams,lakes or that is on the downstream side of a dam) - groundwater downgradient from the wetland. Note which of the following conditions EYES multiplier is 2 ONO multiplier is 1 provide the sources ofpollutants. A unit may have pollutants coming from several S TOTAL -Hydrologic Functions Multiply the score from S S 3 by 4 sources,but any single source would qualify as opportunity. Add score table on S 1 17:7" ❑Grazing in the wetland or within 150ft Comments ❑Untreated stormwater discharges to wetland El Tilled fields,logging,or orchards within 150 feet of wetland ❑✓ Residential,urban areas,or golf courses are within 150 ft upslope of wetland multiplier ❑Other 2 . 'DYES multiplier is 2 ENO multiplier is 1 S TOTAL-Water Quality Functions Multiply the score from SI by S2 Add score to table on p.1 10 Comments Wetland Rating Form—western Washington 11 August 2004 Wetland Rating Form—western Washington 12 August 2004 version 2 Updated with new WDFW definitions Oct.2008 version 2 Updated with new WDFW definitions Oct.2008