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r <br /> \A etland name or number <br /> Classification of Wetland Units in Western Washington <br /> If the hydrologic criteria listed in each question do not apply to the entire unit being <br /> rated,you probably have a unit with multiple HGM classes. In this case,identify which <br /> hydrologic criteria in questions I-7 apply,and go to Question S. <br /> 1.Ar he water levels in the entire unit usually controlled by tides(i.e. except during floods)? <br /> t —go to 2 YES—the wetland class is Tidal Fringe <br /> If yes, is the salinity of the water during periods of annual low flow below 0.5 ppt(parts per <br /> thousand)? YES—Freshwater Tidal Fringe NO—Saltwater Tidal Fringe(Estuarine) <br /> If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine <br /> wetlands. If it is Saltwater Tidal Fringe it is rated as an Estuarine wetland. Wetlands that <br /> were called estuarine in the first and second editions of the rating system are called Salt <br /> Water Tidal Fringe in the Hydrogeomorphic Classification. Estuarine wetlands were <br /> categorized separately in the earlier editions,and this separation is being kept in this <br /> revision. To maintain consistency between editions,the term "Estuarine"wetland is kept. <br /> Please note,however,that the characteristics that define Category I and II estuarine <br /> wetlands have changed(see p. ). <br /> 2.The entire wetland unit is flat and precipitation is the only source(>90%)of water to it. <br /> Groundwater and surface water runoff are NOT sources of water to the unit. <br /> 0 go to 3 YES—The wetland class is Flats <br /> If your wetland can be classified as a"Flats"wetland,use the form for Depressional <br /> wetlands. <br /> 3. Does the entire wetland unit meet both of the following criteria? <br /> The vegetated part of the wetland is on the shores of a body of permanent open water <br /> (without any vegetation on the surface)at least 20 acres(8 ha) in size; <br /> _At least 30%of the open water area is deeper than 6.6 ft(2 m)? <br /> co—go to 4 YES—The wetland class is Lake-fringe(Laeustrine Fringe) <br /> 4. Does the entire wetland unit meet all of the following criteria? <br /> The wetland is on a slope(slope can be very gradual), <br /> The water flows through the wetland in one direction(unidirectional)and usually <br /> comes from seeps. It may flow subsurface,as sheetflow,or in a swale without <br /> distinct banks. <br /> The water leaves the wetland without being impounded? <br /> NOTE: Surface water does not pond in these type of wetlands except occasionally in <br /> very small and shallow depressions or behind hummocks (depressions are usually <br /> <3fi diameter and less than I foot deep). <br /> O-go to 5 YES—The wetland class is Slope <br /> Wetland Rating Form—western Washington 3 August 2004 <br /> version 2 Updated with new WDFW definitions Oct.2008 <br />