Notes
Draft memorandum dated 8/13/01 from Ray Hellwig, Director, to Tom Fitzsimmons, Director, Washington State Department of Ecology, recommending approval of a 401 Water Quality Certification for the Port Of Seattle Sea-Tac International Airport (STIA) Third Runway and related projects. Document AR028003 covers the Port’s proposals to construct an 8,500-foot parallel third runway, two Runway Safety Areas (RSAs), and the South Aviation Support Area (SASA) in King County, City of SeaTac. Addresses impacts including fill of 18.7 acres of wetlands (forested, scrub-shrub, emergent), reconstruction of 980 linear feet of Miller Creek, 1,290 linear feet of drainage channels in Miller Creek sub-basin, 100 linear feet in Des Moines Creek sub-basin, and over 20 million cubic yards of fill material. Discusses Stormwater Management Plan (SMP), Low-Flow Management Plan (LFMP), Natural Resource Mitigation Plan (NRMP), 390.1 acre-feet stormwater detention, 88 AF underground vault, 201.14 acres of wetland mitigation in Auburn (WRIA 9), Bird Air-strike Hazard (BASH), Wildlife Hazard Management Plan, FAA MOA, Clean Water Act Section 401, ACOE Section 404, Coastal Zone Management Program, Green-Duwamish Watershed, Walker Creek, Best Management Practices (BMPs).