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Wetland name or number A <br />S Slope Wetlands Points <br />WATER QUALITY FUNCTIONS - Indicators that the wetland unit functions to (W). i cure <br />improve water quality r<T1. <br />S S 1. Does the wetland unit have the potential to improve water quality? (see p.64) <br />S <br />S 1.1 Characteristics of average slope of unit: <br />❑Slope is I % or less (a I %slope has a 1 fool vertical drop in elevation for even iOQfi <br />horizontal distance) points = 3 <br />❑Slope is1%-2% points =2 <br />4 <br />❑✓ Slope is 2%- 5% points = 1 <br />Slope is greater than 5 % points = 0 <br />S <br />S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS <br />d. minions) <br />3 <br />✓ YES = 3 points NO = 0 points <br />S <br />S 1.3 Characteristics of the vegetation in the wetland that trap sediments and pollutants: <br />Figure 2.t_V <br />Choose the paints appropriale for the description that best.Tts the vegetation in the <br />wetland. Dense vegetation means you have trouble seeing the soil surface (>75 % <br />cover), and tmcut means not grazed or mowed and plants are higher than 6 inches. <br />0 Dense, uncut, herbaceous vegetation > 90% of the wetland area points = 6 <br />E✓ Dense, uncut, herbaceous vegetation > 1/2 of area points = 3 <br />3 <br />❑ Dense, woody, vegetation > '/x of area points = 2 <br />0 Dense, uncut, herbaceous vegetation > 1 /4 of area points = I <br />0 Does not meet any of the criteria above for vegetation points = 0 <br />Aerial photo or map with vegetation polygons <br />S <br />Total for S 1 Add the points in the bases above <br />1 _ 7 I <br />S <br />S 2. Does the wetland unit have the opmortunity to improve water quality'. <br />(.see p77) <br />Answer YES if you know or believe there are pollutants in groundwater or surface water <br />coming into the wctland that would otherwise reduce water quality in streams, lakes or <br />groundwater downgradient from the wetland. Note which ofthefollmwing conditions <br />provide the .sources of pollwants. A unit may have pollutants coming from several <br />sources, but any single source would qualify as opportunio,. <br />❑ Grazing in the wetland or within 1501t <br />❑ Untreated stomtwater discharges to wctland <br />❑ Tilled fields, logging, or orchards within 150 feet ofwctland <br />❑✓ Residential, urban areas, or golf twurscs arc within 150 fl upslope of wctland <br />multiplier <br />❑ Other <br />2 <br />[DYES multiplier is 2 ❑NO multiplier is 1 <br />S <br />TOTAL - Water Quality Functions Multiply the score from S1 by S2 <br />14 <br />Add score to table on p. 1 <br />Comments <br />Wetland name or number A <br />S Slope Wetlands Points <br />i-fYDROLOGIC FUNCTIONS - Indicators that the wetland unit functions to Wly I n— <br />reduce flooding and stream erosion p`rb`1 <br />S 3. Does the wetland unit have the potential to reduce flooding and stream <br />(seep.68) <br />erosion? <br />S <br />S 3.1 Characteristics of vegetation that reduce the velocity of surface flows during stones. <br />Choose the points appropriate for the description that best.fl conditions in the wetland <br />(r/emr'nf planlr should he thick enough (usually > 1/8in), or dense enough, to remain <br />erect during surface flows) <br />Densc, uncut, rigid vegetation covers > 90% of the area of the wetland, points = 6 <br />3 <br />✓ Dense, uncut, rigid vegetation > 1 /2 area of wetland points = 3 <br />Dense, uncut, rigid vegetation > 1/4 area points = I <br />❑ More than 1 /4 of area is grazed, mowed, tilled or vegetation is <br />not rigid points = 0 <br />S <br />S 3.2 Characteristics of slope wetland that holds hack small amounts of flood flows: <br />The slope wetland has small surface depressions that can retain water over at least <br />10% of its area. ❑✓ YES points = 2 <br />2 <br />NO points=0 <br />S <br />Add the points in the boxes above <br />1 5 <br />see p. 70) <br />S <br />S 4. Does the wetland have the opportunity to reduce flooding and erosion? <br />Is the wetland in a landscape position where the reduction in water velocity it provides <br />helps protect downstream property and aquatic resources from flooding or excessive <br />and/or erosive flows? Note which ofthefollowing conditions apply. <br />❑✓ Wetland has surface runoff that drains to a river or stream that has flooding <br />problems <br />❑ Other <br />multiplier <br />(Answer NO if the major source ofwater is controlled by a reservoir (e.g, welland is a seep <br />2 <br />that is on the downstream side ofa dam) <br />✓ YES tnulti lier is 2 NO multiplier is I <br />S <br />TOTAL - Hydrologic Functions Multiply the score from S 3 by S 4 <br />Add score to table on p. 1 <br />1 O <br />Comments <br />Wetland Rating Form —western Washington I I August 2004 Wetland Rating Form —western Washington 12 August 2004 <br />version 2 version 2 <br />