1720 121ST ST SE 2016-01-01 MF Import

Areas posseasing wetland hydrology are inundated or saturated either permanently or periodically during We growing sesson. 'Ibe site was examined for indicatora of weUand hydrology, including pondIng. soil saturation, water-stained leaves, and cracldug at the aoil surfaa. In areas where no positive iadlcators of wedand 6ydrology were observed, but positive wetland indicators wero present for soils and vegetadoa, wedaad hydrology was assumed to be preseaG Hydrophytic plants are Wose plants that grow in water or in a subsuate that is at least periodtcally saturated. Commonly oavrting plant apectes have been rated by the USFWS es to their frequenry of axurrence in wedands. The rating syatem uses a range from obligate uplaad (plants that occur in wedaeds leaa Wan 196 of the Wne) to facultative (plants that oavr tn wetlanda between 3396 and 6696 of the dme) to obligate wedanu (plants t6at occur in wedands greater t6an 993'0 of the time). For an area to be considered a wetland vegetadve oommuniry, 3096 or more of the dominant apecies tn that area must be rated as facultadve or wetter. Vegetadon throughout the site was examined and rernrded on data forms. Resnite The original wedand survey was conducted using both the USFWS and the Corps methodology. Of the entire 1.87 acres of the site, appro�cimately 0.75 acres were mapped as wetlands. The more recent delineation utiliung tha UFM located an additional 0.03 acres of emergent wedand (see Figure 2). 'I1vo wedands were located on We property; an area of about 0.62 acres on the nort6em portion of the site and about 0.16 acres located in the southwest rnmer. Data sheets 1 Wroug6 6 display inforrttadon for the southwest wetland, and sheets 7 through 11 were taken at the northern end of the site. Approximately 0.41 acres of the northern wedand has been previously iilled. Even though filled, all of the area is considered wedand because of t6e presence of posidve wedand indicators. A 5- to 10-foot ripazian corrfdor associated with Silver Lake Creek runs along the westem properry line. Soils The Soil Conservadon Service maps the area as a mix of McKenna gravelly silt loam and terric medisaprists. Both of these soils are listed as 6ydric (wedand) soils. McKenna soils are poorly drained soils underlain by glacial till. Terric medisaprists are deep, poorly drained organic soils formed in silluvium. • Site investigation with a hand suger and shovel confirtned the presence of t6ese soils. Soils encountered range from coarse fill to organic silts. The northem 0.41 acres of the property have been filled with 1 to 3 feet of gravelly, sandy fill. Because the fill material was recently placed on the site, the fill displays none of the standazd indicators used to determine the presence of a native weUaad soil. Even in the absence of these indicators, 4