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Conclusion: The areas that are mapped as non -wetland do not meet all three parameters <br />for classification as wetland according to the Washington State Wetlands Identification and <br />Delineation Manual, 1997 edition. <br />EXISTING FUNCTIONS AND VALUES ASSESSMENT <br />Methodology <br />The methodology for this functions and values assessment is based on professional opinion <br />developed through past field analyses and interpretation. This assessment pertains <br />specifically to the on -site wetland and stream system, but is typical for assessments of <br />similar systems common to Western Washington. <br />Wetlands in Western Washington perform a variety of ecosystem functions. Included among <br />the most important functions provided by wetlands are stormwater control, water quality <br />improvement, and fish and wildlife habitat. <br />Stormwater Storage/Floodflow Attenuation <br />Wetland A: Wetland A provides a moderate value for stormwater storage/floodflow <br />attenuation function due to its ponding potential and slightly constricted surface outlet. This <br />function is somewhat limited though due to the small size and linear shape of the wetland. <br />Wetlands B, C and D: These wetlands provide low to moderate stormwater <br />storage/floodflow attenuation function due to their small ponding potential and slightly <br />constricted to unconstricted surface outlets. This function is also limited due to their small <br />size. <br />Wetland E: Wetland E has a moderate to high value for stormwater storage/floodflow <br />attenuation function due to the lack of a surface outlet and ponding characteristics. This <br />function is somewhat limited though due to the small size of the wetland. <br />Wetland F: Wetland F has a low value for stormwater storage/floodflow attenuation function <br />due to its sloped topography and lack of ponding. <br />Water Quality <br />Wetlands A, B, C, D and F: These wetlands have potential to increase water quality as <br />hydrology passes through them by acting as natural filters. Woody vegetation within the <br />wetlands uptakes overloaded nutrients and helps drop solids from suspension. Additionally, <br />the vegetation within the wetlands causes hydrology to slow, increasing the chance that <br />suspended solids will drop out. This function is somewhat limited due to the small sizes of <br />these wetlands. <br />Wetland E: This wetland has no flow and little vegetation in the ponded areas. Coupled with <br />the lack of a surface outlet, these features limit the amount of water quality improvement <br />provided to .downstream systems. Some water quality improvement function may exist <br />based on particulates settling out through organic soils. <br />Critical Area Study and Buffer Mitigation Plan 10 WRI# 09084 <br />Intermec- Lot 2 Revision#2: March 22, 2010 <br />