859 LOCUST ST 2022-07-20 - Laserfiche WebLink

r � , ?F. 1.1 - Executive Summary The Everett Housing Authority is proposing to construct a clubhouse and parking area for the Grandview Apartment Complex. The site is located at 857 Locust Street in Everett,Washington. The project site is currently zoned as R-4,Multiple Family High Residential. The tax parcel number associated with this project is 00459200100000. The project area is bordered on all sides by multi-family residences. The proposed clubhouse parking lot will be accessible via Locust Street. This project proposes the addition of a clubhouse for the Grandview Apartment complex. The clubhouse approximately 3,230 square feet and is to be placed where a play area has demolished. A total of 10,900 square feet of impervious surface will be added upon completion of the improvements. These improvements shall replace 6,600 square feet of impervious playground and storage area that has since been demolished as well as 4,300 square feet of lawn. The stormwater runoff from the clubhouse parking area shall sheet flow west into a drainage swale. This drainage within the swale shall be conveyed to a rain garden west of the proposed clubhouse.Drainage from the clubhouse roof shall be conveyed from downspouts to the rain garden. Excess stormwater within the rain garden shall flow from Type 1-L catch basin to the combined sewer system just north of the proposed clubhouse. Existing stormwater runoff on the site sheet flows to the west until it is captured within catch basins connected to the combined sewer system. 1.2 -Minimum Requirements This report provides stormwater requirements and design calculations for the proposed improvements. The project will add more than 5,000 square feet of new impervious surfaces; Therefore, in accordance with Figure 2.4.2 in Volume I of the 2012 SMMWW, all Minimum Requirements will apply to new and converted impervious surfaces. Minimum Requirement#1: Preparation of Stormwater Site Plans A Stormwater Site Plan has been prepared for the project. A full size plan is included with the Site Plan Submittal and a reduced size copy is included in this report.The USDA Soil Conservation Service has classified the soils as Alderwood-Urban Complex with 2-8% slopes. Alderwood- Urban complex soils are considered to be within Hydrologic Soil Group B and tend to have moderate infiltration rates when thoroughly wet. This report and accompanying plans constitute the Stormwater Site Plan. DAVID EVANS AND ASSOCIATES,INC. GRANDVIEW APARTMENTS CLUBHOUSE MARCH,2017 STORMWATER SITE PLAN PAGE 2