9212 HOLLY DR 2018-01-02 MF Import

I 1 I L1 H 1 I I I 1 R 1 11 H n Page 3 of 29 1. Project Overview The project site is located in the NE '/4 of Section 13, township 28 north, range 4 east, W.M. at the intersection of 92 St SW and Holly Dr. in the City of Everett. See Figure 1 — Vicinity Map, for a detailed map of the project location. The site is currently the Holly Vista Mobile Home Community containing 54 mobile home lots. The proposed project will include 50 condominium units with curb, gutter, sidewalk, water, sewer, and storm drainage improvements. Half street frontage improvements are proposed for Holly Drive along the property frontage. The frontage improvements will widen the paved half surface to 18-feet with curb, gutter, sidewalk and storm drainage. See Figure 2 — Site Plan, for the complete site layout. Detention is not required for this property because it is a "redevelopment' project. However, water quality is required. Storm water runoff will be conveyed to a water quality facility in the south-east corner of the property. Water quality mitigation will be achieved by the use of a storm filter canister system (Stormfilter* by Contech Stormwater Solutions, Portland OR). Pretreatment is required with this water quality -op 'on. The pretreatment option selected for use with the Stormfilter`' vault is the Aqua -Swirl® —by AquaShield, Chattanooga, TN. A flow splitter will take the pretfeatment-'and" water quality facilities offline when the water quality design storm is exceeded. This site is located within the North Creek Sub -basin of the Lake Washington Watershed. r,. The soils are Alderwood till (see soils exhibit in the Appendix). i JUr ec a LJ