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Wetland name or number C <br />D Depressional and Flats Wetlands Points <br />WATER QUALITY FUNCTIONS - Indicators that the wetland unit functions to way I ,Carr <br />improve water quality Prrba:t <br />D D 1. Does the wetland unit have the potential to improve water quality? (see p.38) <br />D I.1 Characteristics of surface water flows out of the wctland: <br />Figure RNd <br />is a depression with no surface water leaving it (no outlet) points = 3 <br />D <br />�Unit <br />Unit has an intermittently flowing, OR highly constricted pcmrancntly flowing outlet points = 2 <br />Unit has an unconstricted. or slightly constricted, surface outlet (permanenllr,llowing) points = I <br />Unit is a "flat" depression (Q. 7 on key), or in the Flats class, with pcnnancnt surface outflow and <br />2 <br />no obvious natural outlet and/or outlet is a man-made ditch points = I <br />(/'ditch is not permancnlAvjlawing ima nnif as "interminenilv,powing') <br />Provide photo or drawing <br />S 1.2 The soil 2 inches below the surface (or duff layer) is clay or organic (use NRCS <br />DYES <br />definitions) <br />4 <br />points =4 <br />8 <br />NOpoints = 0 <br />D <br />1.3 Characteristics of persistent vegetation (emergent, shrub, and/or forest Cowardin class) <br />Figure RMt <br />Welland has persistent, ungrazed, vegetation > = 95 % of area points = 5 <br />D <br />Wetland has persistent, ungrazed, vegetation > = 1/2 of area points = 3 <br />�Wclland <br />Wetland has persistent, ungrazed vegetation > = i /10 of area points= I <br />3 <br />has persistent, ungrazed vegetation <I/10 of area points = 0 <br />Map of Cowardin vegetation classes <br />D1.4 Characteristics of seasonal pending or inundation. <br />Figure RAN <br />This is the area of the welland unit that is ponded.for at leas/ 2 months, but dries nut <br />D <br />sometime during the year. Do nor count the area that is permanently ponded Estimate <br />the overage condition S not of 10 yrs. <br />2 <br />Area seasonally ponded is >'✓r total area of wetland points = 4 <br />pama,as <br />Area seasonally ponded is>'/4 total area of wctland points = 2 <br />Area seasonally ponded is <'/4 total area of wetland points = 0 <br />Map of H dro eriods <br />D <br />Total for D 1 Add the points in the boxes above <br />I 1 I <br />(seep. 44) <br />D <br />D 2, Does the wetland unit have the opportunity to improve water quality? <br />Answer YES if you know or believe there are pollutants in groundwater or surface water <br />coming into the wetland that would otherwise reduce water quality in streams, lakes or <br />groundwater downgradient from the wetland. Note which of lhefnllowing conditions <br />provide the sources of polhiraws. A unit may have pollutants conning from several <br />sattrces, but any single source would qualify as opportuni(v. <br />Grazing in the wetland or within 150 ft <br />✓ Untreated slornrwaler discharges to wetland <br />Tilled fields or orchards within 150 ft of wetland <br />A stream or culvert discharges into welland llmt drains developed areas, residential areas, <br />. <br />farmed fields, roads. or clear-cut logging <br />Residential, urban areas, golf courses arc within 150 R of wetland <br />multiplier <br />Wetland is fed by groundwater high in phosphorus or nitrogen <br />Other <br />2 <br />YES multi licr is 2 =NO multiplier is 1 <br />D <br />TOTAL - Water Quality Functions Multiply the score from D I by D2 <br />22 <br />Add score to table on n. 1 <br />Wetland name or number C <br />D Depressional and Flats Wetlands Points <br />HYDROLOGIC FUNCTIONS - Indicators that the wetland trait functions to Wrly I'rarc <br />reduce flooding and stream degradation per box) <br />D 3, Does the wetland unit have the potential to reduce flooding and erosion? (see p.46) <br />D <br />3,1 Characteristics of surface water flows out of the wetland unit <br />Unit is a depression with no surface water leaving it (no outlet) points = 4 <br />Unit has an intermittently flowing. OR highly constricted permanently flowing outlet points = 2 <br />2 <br />Unit is a "flat" depression (Q. 7 on key), or in the Flats class, with pemtanent surface outflow and <br />no obvious natural outlet and/or outlet is a man-made ditch points = I <br />(Ifabch is not pernnnnentlr.11owtng Ireru MO ns "i 11CrmillenllV. lowing') <br />Unit has an unconstricted, or.5lightly constricted, surface outlet (termmnendr /lowin) points = 0 <br />D <br />D 3.2 Depth of storage during wct periods <br />Estimate the height of ponding above the hollnm of the owlet. For omits with no owlet <br />measure,from the,surfare ofpermanent water or deepest part (if dt3). <br />arks of ponding are 3 ft or more above the surface or bottom of outlet points = 7 <br />he wetland is a "headwater" wctland" points — 5 <br />3 <br />Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5 <br />✓ Marks arc at least 0.5 ft to < 2 ft front surface or bottom of outlet points = 3 <br />Unit is flat (yes to Q. 2 or Q. 7 on key) but has small depressions on the surface that trap <br />water points = I <br />arks of ponding less than 0.5 ft points = 0 <br />D <br />D 3.3 Contribution of wetland unit to storage in the watershed <br />Estimate the ratio of the area of upstream basin contributing surface water to the wetland <br />to the area of the wetland unit itself. <br />The area of the basin is less than 10 times the area of unit points = 5 <br />0 <br />The area of the basin is 10 to 100 times the area of the unit points = 3 <br />✓ The area of the basin is more than 100 times the area of the unit points = 0 <br />Entire unit is in the FLATS class points = 5 <br />D <br />Total for D 3 Add the points in the boxes above <br />1 m5 m I <br />D <br />D 4. Does the wetland unit have the opportunity to reduce flooding and erosion? <br />(seep. 49) <br />Answer YES if the unit is in a location in the watershed where the flood storage, or <br />reduction in water velocity, it provides helps protect downstream property and aquatic <br />resources from flooding or excessive and/or erosive flows. Answer NO if the water <br />coming into the wctland is controlled by a structure such as flood gate, tide gate, flap <br />valve, reservoir etc. OR you estimate that more than 90% of the water in the wctland is <br />front groundwater in areas where damaging groundwater flooding does not occur. <br />Note which ofthefollowing indicators of opportunity apply. <br />❑ Welland is in a headwater of a river or stream that has flooding problems <br />❑✓ Welland drains to a river or stream that has flooding problems <br />❑ Wetland has no outlet and impounds surface runoff water that might otherwise <br />now into a river or stream that has flooding problems <br />multiplier <br />❑ Other <br />EYES multiplier is 2 ❑NO multiplier is 1 <br />2 <br />D7 <br />TOTAL - Hydrologic Functions Multiply the score from D 3 by D 4 <br />Add score to table on p. I <br />10 <br />Wetland Rating Form —western Washington 5 August 2004 Wetland Rating Form —western Washington 6 August 2004 <br />version 2 version 2 <br />