1001 SHUKSAN WAY 2016-01-01 MF Import

i , � 1 between King's Exwsion and FSA aze approximately the same. 77iere are no off-site tributary w eas contributing runoff to this project basin. 1 � 3. Off-Site Analysis One Duarter Mile Downstream Inventory ` The stormwater will be-eleased from the s.te into a proposed storm sewer system which will flow approximately 2001inear feet into a proposed temporary infiltration pond on the CSR Associated 1 property until such time as the drainage infrascructure is extended north to 60th Street SW,and a dischazge is constructed to the headwaters of Glenwood C�eek and/or a Glenwood Creek bypass, as determined by the City of Everett. There aze two 36-inch culverts under 60th Sareet SW which I dischazge stormwater runoff into Glenwood Creek. The Gienwood Creek bypass is a storm sewer system within the 60th Street SW right-of way which flows easterly to Glenwood Avenue; 60th Street SW is about 1,200 feet nonh of the FSA site. 1 4. Analysis and Design of Required Erosion and Sediment Control BMPs INarrative� ( The 3easonai?.imitations Rating CheckGst from Table i-2.l of the City of Everett Stormwater Management Msnual was used to determine a seasonal limitation period for land alteration I activities. Since the site is not hydraulically neaz a sediment/erosion sensitive feature and the total score is greater than 100 points, the seasonal limitation period for land alteration activities is limited to a time from February l to November 1. The Seasonal Limitations Rating Checklist is ' shown as Table I. The existing site is a gravel pit in which portions of the site aze being mined while other portions � aze being reclaimed. CSR Associated will provide FSA with a near level site at approximate subgrade elevation so there are no steep slopes or natural vegetation buffers. IThe following Erosion and Sediment Control BMPs aze shown on tne Erosion Convol Plan: • Temporary silt fence according to City Standazd Plan 205A around the north, west, and south f property lines. l . Silt fence with berm and trench according to City Standard Plan 205B along the east property � line from the southeast comer to the sedin�entation pond. • Catch basin/inlet sed'unentation trap type C(minimum 2 foot depth and 3 foot width around I the strocture) according to City Standazd Plan 213. � • Restrictor riser filters according to detail 2 on sheet C2.1. IFood Serviccs o(America Stormwater Site Plan and Stortnavata Detentim Pand � IHydraulic Report 'Z' �