May 14, 2001August 2, 2026

EXH AR029174: 401 Permit Decision-Making, Sea-Tac Airport Third Runway — Technical Meeting Notes, May 14, 2001

Notes

Final draft technical meeting notes from May 14, 2001 (1:00–4:00 PM) for the 401 Permit Decision-Making process for Sea-Tac International Airport Third Runway. Prepared by Kathryn Snider, Floyd & Snider Inc. Attendees included Ann Kenny and John Drabek (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port of Seattle), Tom Atkins (Parametrix), Alan Black (HNTB). Meeting covered King County feedback on Deliverables 3 (Des Moines Creek), 4B (Infiltration Feasibility at SDW-2 Pond F, Walker Creek basin, Hart Crowser report), 4A (Walker Creek, HSPF, WDM files, Table A-8, Figure A-10 flow duration graphs), 5 (General, Table A-3 stormwater detention), 7B (154th Street), and 8 (Volume 1). Administrative Record numbers AR 029174–AR 029176, ECY00018974–ECY00018976.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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