March 26, 2001August 2, 2026

EXH AR029142: Draft Technical Meeting Notes — 401 Permit Decision-Making, Sea-Tac Airport Third Runway, March 26, 2001

Notes

Draft meeting notes prepared by Rachel McCrea of Floyd & Snider Inc. for a 401 Permit Decision-Making Technical Meeting held March 26, 2001, regarding the Sea-Tac International Airport Third Runway. Attendees included John Drabek and Ann Kenny (Dept. of Ecology), Keith Smith (Port Of Seattle), Kelly Whiting (King County), Paul Fendt and Tom Atkins (Parametrix), Joe Brascher (AquaTerra). Topics covered: Deliverable 1 feedback on ASR site (pond outfall location, embankment spillway, riser overflow, KCSWDM compliance); Deliverable 2 clarification on Walker Creek input files submitted to King County and Ecology; Deliverable 3 progress on Des Moines Creek calibration ripple effect and interim Deliverable 3A (event hydrographs, mass balance numbers); Deliverable 4 scoping for Walker Creek Group 2 checklist including HSPF software bug fix, SDW2 pond infiltration feasibility, airport security fencing per KCSWDM, and Low Flow Augmentation items. AR029142, ECY00007546.

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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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