1710 121ST ST SE 2016-01-01 MF Import

Areas possessing wetland hydrology are inundated or saturated either permanently or periodically during the growing seacon. '1be site was examined for indicators of wetland hydrology, including ponding, soil saturadon, water-staiued leaves, and cracking at the soil surface. In areas where no positive indicators of wetland hydrology were observed, but positivc wedand indicators were present for co�ls end vegetadon, wetland hydrolo� waz azsumed to be presen� Hydrophytic plants are those plants that grow in water or in a substrate that is at least periodically saturated. Commonly occurrin8 pi�t species have been rated by the USFWS as to t6eir f�equenry of oavaenoe in w�Uands. The rating system uses a rangc from obligate uplanJ (plants that oavr in wetlands less than 13'0 of the dme) to facultative (plants that oavr in wedands between 33% aad 66g'o of the time) to obligate wetland (plants that occur in wetlaads greater than 99% of the time). For an area to be considered a wetland vegetadve mmmunfry, 5096 or more of t6e dominant apecies in that area must be rated as facultative or wetter. VegetsUion throughout the site was examined and recorded on data forrtu. Re�sults The original wr.tland survey was conducted using both the USFWS and the Corps methodology. Of th� entire 1.87 acres of du site, approximately 0.75 acres were mapped as wetlands. The more recent delineadon udlizing the UFM located an additional 0.03 acres of emergent wedand (sce Figure 2). 'I1vo wedands were located on the property; an area of ab:.ut 0.62 acres on the northem portion of the site and about 0.16 acres located in the sout6west corner. Data sheets 1 t6rc�ugh 6 d�splay informadon for the southwest weNand, and sheets 7 through 11 were taken at the norchern end of the site. Approzimately 0.41 acres of the northern wedand has been previously filled. Even though filled, all of the area is rnnsidered wetland because of the presence of posidve wetland indicators. A S- to 10-foot ri��arian corridor associated with Silver I-ake Creek runs along the westem property line. Soils The Soil Conservation Servia maps the area as a mix of McKenna gravelly silt loam and terric medisaprists. Both of these soils are listed � hydric (wetland) soils. McKenna soils are poorly draiaed soils underlain L� giacial u��• Terric medisaprists are deep, poorly drained organic soils %rmed in alluvium. • Site investigation with a hand auger and shovel oonfirmed the presena of these soils. Soils enrnuntered range from coarse fill to organic silts. 'Ilu northern 0.41 acres of the property have been filled wit6 1 to 3 feet of gra�elly, sandy fill. Bocause the 6ll material was recently placed on the site, the fill displays none of the standard indicators used to deternune the presence of a native wedand soil• Even in the absena of these indicators, 4 � z