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Wetland name or number A <br />5. Does the entire wetland unit meet all of the following criteria? <br />The unit is in a valley, or stream channel, where it gets inundated by overbank ' <br />flooding from that stream or river <br />The overbank flooding occurs at least once every two years. <br />NOTE: The riverine unit can contain depressions that are filled with water when the river is ' <br />not flooding. <br />QNO - go to 6 ❑YES — The wetland class is Riverine <br />6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the , <br />surface, at some time during the year. This means that any outlet, if present, is higher than the <br />interior of the wetland. <br />❑NO — go to 7 7 YES —The wetland class is Depressional , <br />7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank <br />flooding. The unit does not pond surface water more than a few inches. The unit seems to be ' <br />maintained by high groundwater in the area. The wetland may be ditched, but has no obvious <br />natural outlet. <br />❑NO — go to 8 ❑YES — The wetland class is Depressional <br />8. Your wetland unit seems to be difficult to classify and probably contains several different HGM <br />clases. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small ' <br />stream within a depressional wetland has a zone of flooding along its sides. GO BACK AND <br />IDENTIFY WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 <br />APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use ' <br />the following table to identify the appropriate class to use for the rating system if you have several <br />HGM classes present within your wetland. NOTE: Use this table only if the class that is <br />recommended in the second column represents 10% or more of the total area of the wetland unit ' <br />being rated. If the area of the class listed in column 2 is less than 10% of the unit; classify the <br />wetland using the class that represents more than 90% of the total area. <br />HGM Classes within the wetland unit being rated <br />HGM Class to Use in Rahn <br />Slope + Riverine <br />Riverine <br />Slope + Depressional <br />Depressional <br />Slope + Lake -fringe <br />Lake -fringe <br />Depressional + Riverine along stream within boundary <br />Depressional <br />Depressional + Lake -fringe <br />Depressional <br />Salt Water Tidal Fringe and any other class of freshwater <br />wetland <br />Treat as ESTUARINE under <br />wetlands with special <br />characteristics ❑ <br />If you are unable still to determine which of the above criteria apply to your wetland, or if you <br />have more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional <br />for the rating. <br />Wetland Rating Form — western Washington 4 August 2004 <br />version 2 Updated with new WDFW definitions Oct. 2008 <br />