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Wetland Delineation Report June,2015 <br /> South Everett Forest Preserve ©2015 Perteet Inc. <br /> Table 2 —Aquatic Resource Ratings/Types and Buffers <br /> Classification Approx. Standard <br /> Feature Buffer <br /> Cowardin" HGM Ecology City of Everett Size on Width <br /> Site (SF) (feet) <br /> Wetland PSS/PFO Riverine Cat I1B Cat Ilc 48,469 75E <br /> Silver Lake R4UB Riverine n/a NS° n/a 50F <br /> Creek <br /> Notes: <br /> A. Cowardin et al.(1979)classification based on vegetation: PSS=Palustrine Scrub-Shrub;PFO= Palustrine Forested;and <br /> R3UBC=Riverine/Upper Perennial/Unconsolidated Bottom <br /> B. Ecology rating according to Hruby(2004,2008). <br /> C. Wetlands rated according to the City of Everett Code (Title 19,Chapter 37.090). <br /> D. Stream rated according to City of Everett Code(Title 19,Chapter 37.160)and WAC 222-16-030 <br /> E. Wetland buffer width according to City of Everett Code(Title 19,Chapter 37.1 10). <br /> F. Stream buffer width according to City of Everett Code(Title 19,Chapter 37.170). <br /> 4.5 Wetland and Stream Functions and Values <br /> As part of the site assessment, a functions and values analysis was performed for the wetland and stream <br /> within the project area. For this study, the results from the state rating system were used to assess <br /> wetland functions. In addition, the Ecology document, Using the Wetland Rating System in Compensatory <br /> Mitigation (Ecology 2008), provided guidance in the assessment. <br /> The state rating system utilizes three parameters to rate wetlands: water quality functions, hydrologic <br /> functions, and habitat functions. Water quality functions refer to the ability of a wetland to improve <br /> water quality; hydrologic functions refer to the ability of the wetland to reduce flooding/stream <br /> degradation; and habitat functions refer to the wildlife habitat provided by the wetland. The scores from <br /> the state rating system are used to determine how well a wetland performs these functions. Table 3 <br /> summarizes the qualitative values for the functions that were assessed in the wetland on the South <br /> Everett Forest Preserve property. <br /> Table 3 — Functional Assessment for Wetland on the South Everett Forest Preserve <br /> Categories of Assessed Functions <br /> Water Quality Hydrology Habitat <br /> Feature Potential Opportunity Potential Opportunity Potential Opportunity <br /> Wetland Moderate Yes Moderate Yes Moderate Low <br /> Water Quality Functions <br /> The wetland has a moderate potential to improve water quality because it has surface <br /> depressions and dense woody vegetation. Because there are sources of pollutants entering the <br /> wetland from adjacent residential properties, there is an opportunity to perform water quality <br /> functions. <br /> Page I I <br />