Notes
Draft memorandum dated 8/6/01 from Ray Hellwig, Director, Washington State Department of Ecology, to Tom Fitzsimmons, Director, recommending approval of a 401 Water Quality Certification for the Port Of Seattle’s Sea-Tac International Airport Third Runway project. Document covers 8,500-foot parallel third runway, Runway Safety Areas (RSAs), South Aviation Support Area (SASA), impacts to approximately 700 upland acres, 18.37 acres of wetland fill (8.17 forested, 2.98 scrub-shrub, 7.22 emergent), 980 linear feet of Miller Creek filling, Des Moines Creek and Walker Creek sub-basins, 20 million cubic yards of embankment fill, 390.1 acre-feet stormwater detention, Natural Resource Mitigation Plan (NRMP), Stormwater Management Plan (SMP), Low-Flow Management Plan (LFMP), 201.14 acres wetland mitigation (Auburn off-site in WRIA 9), Bird Air-strike Hazard (BASH), Wildlife Hazard Management Plan, Federal Clean Water Act Section 401, Army Corps of Engineers Section 404, Coastal Zone Management Program, King County, City of SeaTac, Green-Duwamish Watershed. Administrative Record AR017822–AR017824.