4800 DOGWOOD DR 2022-02-28 - Laserfiche WebLink

Wetland name or number A SLOPE WETLANDS Hydrologic Functions - Indicators that the site functions to reduce flooding and stream erosion S 4.0. Does the site have the potential to reduce flooding and stream erosion? S 4.1.Characteristics of plants that reduce the velocity of surface flows during storms: Choose the points appropriate for the description that best fits conditions in the wetland.Stems of plants should be thick enough(usually>1/8 in), or dense enough, to remain erect during surface flows. 0 0 Dense,uncut, rigid plants cover>90%of the area of the wetland points=1 E All other conditions points=0 Rating of Site Potential If score is:_1=M ✓ 0=L Record the rating on the first page S 5.0. Does the landscape have the potential to support the hydrologic functions of the site? S 5.1. Is more than 25%of the area within 150 ft upslope of wetland in land uses or cover that generate excess 1 surface runoff? Yes=1 No=0 Rating of Landscape Potential If score is: ✓ 1=M 0=L Record the rating on the first page S 6.0. Are the hydrologic functions provided by the site valuable to society? S 6.1. Distance to the nearest areas downstream that have flooding problems: nThe sub-basin immediately down-gradient of site has flooding problems that result in damage to human or natural resources(e.g., houses or salmon redds) points=2 0 QSurface flooding problems are in a sub-basin farther down-gradient points=1 ® No flooding problems anywhere downstream points=0 S 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? 0 Yes=2INo=0I Total for S 6 Add the points in the boxes above 0 Rating of Value If score is:_2-4=H 1=M ✓ 0=L Record the rating on the first page NOTES and FIELD OBSERVATIONS: Herbaceous vegetation varies in this wetland and is dense in places and sparse in others. It is not practical to try to map as we were only able to observe a small portion of the wetland that is on and adjacent to the subject property and tree cover precludes us from seeing how dense the herbaceous layer is via aerial photos. We estimate that dense vegetation covers more than half of the wetland based on the portion we saw, but not more than 90%. Rigid plants including giant horsetail (Equisetum telmateia) and skunk cabbage (Lysichiton americanus) occur densely in a small portion of the area we observed. The areas shown as belonging to the 'emergent' class consist almost exclusively of bittersweet nightshade (Solanum dulcamara), which is not "rigid." We estimate that dense, uncut, rigid plants make up less than half of the wetland area. (Again, it is not practical to map these as we only saw a small portion of the wetland and the distribution of the dense and sparse areas form a mosaic.) Wetland Rating System for Western WA:2014 Update 12 Rating Form—Effective January 1,2015