Notes
Final meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the 401 Permit Decision-Making process for Seattle-Tacoma International Airport Third Runway, covering a Low Flow Analysis meeting held July 9, 2001. Attendees included representatives from Washington Department of Ecology (Ann Kenny, John Drabeck), King County (Kelly Whiting), Port Of Seattle (Keith Smith), Parametrix, EarthTech, Aquaterra, and Pacific Groundwater Group. Topics covered: biological effects used in low flow impact determination using 2-year 7-day low flow methodology; Des Moines Watershed mitigation proposal (0.1 cfs mitigation flow, July 24–October 24 duration, 11 acre-feet vault size, pre-project 2-year 7-day low flow 0.35 cfs, post-project 0.25 cfs); Miller and Walker watershed status briefing including SLICE model integration with HSPF, mitigation flow and duration methodology, and non-hydrologic effects in property acquisition area (water rights removal, septic system inputs). Document reference ECY00014997–ECY00014999, AR 029201–029203.