Notes
Technical memorandum dated September 5, 2000 from Elizabeth Leavitt (Port Of Seattle) to Ray Helwig (Washington State Department of Ecology), cc’d to Erik Stockdale, Nancy Groves (Ecology), Jim Kelley and Paul Fendt (Parametrix), Project No. 556-2912-001(03). Addresses CWA Section 401 permit issues for Seattle-Tacoma International Airport Master Plan Update projects involving wetlands and streams. Topics include access to Port Of Seattle mitigation sites (Lora Lake Buffer, Parcels 42/48/52), mitigation credit ratios, buffer doubling at Auburn (50 to 100 feet), Miller Creek buffer averaging, Des Moines Creek setback at Tyee Valley Golf Course, shoreline restoration at Lora Lake (concrete bulkhead removal), coordination with Army Corps of Engineers, NMFS, EPA, King County, WSDOT, performance standards and monitoring protocols for Wetlands 18, 37, and 44, Wildlife Hazard Management Plan (WHMP), FAA approval of Natural Resources Mitigation Plan (NRMP), retaining wall/embankment impact analysis referencing the Gravel study (1.68 acres secondary indirect impact), Stormwater Management Plan (SWMP), and wetlands 3, 4, 5, 7, 8, 9, 11, A1, A11, A13, 12, 13, A5, A6, A8, 36, 37, 43, 44, Channel B. Total wetland impact reported as 18.33 acres.