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Wetland name or number B <br />D Depressional and Flats Wetlands Points <br />WATER QUALITY FUNCTIONS — Indicators that the wetland unit functions to tcnly I '— <br />improve water quality e`rs"l <br />D D 1. Does the wetland unit have the potential to improve water quality? (see p.38) <br />DI of surface water flows out of the wetland: <br />Figure RN3 <br />iis a depression with no surface water leaving it (no outlet) points = 3 <br />DUnit <br />�U.,I,Cliaractcristics <br />has an intermittently flowing, OR highly constricted permanently flowing outlet points = 2 <br />Unit has an unconstrictcd, or slightly constricted, surface outlet (permmncwt vflowing) points = I <br />Unit is a "flat" depression (Q. 7 on key), or in the Flats class, with pemtanent surface outflow and <br />3 <br />no obvious natural outlet and/or outlet is a man-made ditch - points = 1 <br />({fdilch is not permtmenth' flowing treat unit as "inlermillera(V flaq'ing') <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 />dcftnitionr) <br />0 <br />D <br />YES points = 4 <br />B <br />NOpoints = 0 <br />D <br />1.3 Characteristics of persistent vegetation (emergent, shrub, and/or forest Cowardin class) <br />Figure tl <br />Wetland has persistent, ungrazcd, vegetation > = 95% of area points = 5 <br />D <br />✓ <br />Wetland has persistent, ungrazed, vegetation > = 1 /2 of area points = 3 <br />Wetland has persistent, ungrazed vegetation > = i /10 of area points =1 <br />3 <br />Wetland has persistent, ungrazed vegetation <I/10 of area points = 0 <br />Map of Cowardin vegetation classes <br />D1.4 Characteristics of seasonal ponding or inundation. <br />Figure RNO <br />This it the area of the wetland unit that is ponded fur at least 1 months, but dries out <br />D <br />sometime during the,vear, Do not count the area that is permanently ponded Estimate <br />area as dye average condition S opt of l0 vrs. <br />0 <br />Area seasonally ponded is >'/a total area of wetland points = 4 <br />Area seasonally ponded is>'/4 total area of wetland points = 2 <br />✓ Area seasonally ponded is <'/4 total area of wetland points = 0 <br />Map of H dre eriods <br />D <br />Total for D 1 Add the points in the boxes above <br />6 t <br />D <br />D 2. Does the wetland unit have the opportunity to improve water quality? <br />(seep. 44) <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 downgradienl from the wetland. Nate which of the following conditions <br />provide the sources of poliatantc. A unit may have pollutants conning from several <br />sources, but any single source would qualify as oppornmity. <br />Grazing in the wetlund or within 150 ft <br />✓ Untreated slomtwaler discharges to wetland <br />Tilled fields or orchards within 150 ft of wetland <br />A stream or culvert discharges into wetland that drains developed areas, residential areas, <br />farmed fields, roads. or clear-cut logging <br />Residential, urban areas, golf courses are within 150 it 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 I <br />D <br />TOTAL - Water Quality Functions Multiply the score from DI by D2 <br />z <br />Add scare to table on n. 1 <br />Wetland name or number B <br />D Depressional and Flats Wetlands Points <br />HYDROLOGIC FUNCTIONS - Indicators that the wetland unit functions to !only I score <br />reduce flooding and stream degradation per bosl <br />D 3. Does the wetland unit have the potential to reduce flooding and erosion? (see p.46) <br />D <br />D 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 />4 <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 plan -made ditch points = I <br />(lfditch is not perrnanenlivJlowing treat unit as "intermittently flowing') <br />Unit has an unconstrictcd, or slightly constricted, surface outlet terntanenth, flow!") poinIs= 0 <br />D <br />D 3.2 Depth of storage during wct periods <br />Estimate the height ofponding above the bottom of the outlet. Far units with no nutlet <br />measure from the surface nfpernianent water or deepest part (if dry). <br />arks of ponding are 3 ft or more above the surface or bottom of outlet points = 7 <br />❑Fhc wetland is a "headwater" wetland" points = 5 <br />0 <br />❑Marks of pending 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 from 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 = 1 <br />Dviarks of pending 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 ofthe area of upstream basin contributing surface water to the wetland <br />to the area ofthe wetland unit itself. <br />he area of the basin is less than 10 times the area of unit points = 5 <br />0 <br />he area of the basin is 10 to 100 times the area of the unit points = 3 <br />✓ he area of the basin is more than 100 times the area of the unit points = 0 <br />Entirc unit is in the FLATS class points = 5 <br />D <br />Total for D 3 Add the points in the boxes above <br />1 4 1 <br />(seep. 49) <br />D <br />D 4. Does the wetland unit have the opportunity to reduce flooding and erosion? <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 wetland 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 wetland is <br />from groundwater in areas where damaging groundwater flooding does not occur. <br />Note which ofthefollowing indicators ofoppornmity apply. <br />❑ Wetland is in a headwater of a river or stream that has flooding problems <br />❑ Wetland drains to a river or stream that has flooding problems <br />❑✓ Wetland has no outlet and impounds surface nutoff water that might otherwise <br />now into a river or stream that has hooding problems <br />multiplier <br />❑ Other <br />EYES multi licr is 2 ❑NO multiplier is 1 <br />2 <br />D <br />TOTAL - Hydrologic Functions Multiply the score from D 3 by D 47 <br />Add score to table on p. 1 <br />$ <br />Wetland Rating Form —western Washington 5 August 2004 Wetland Rating Form — western Washington 6 August 2004 <br />version 2 version 2 <br />