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Final Natural Resource Mitigation Plan prepared by Parametrix, Inc. for Port Of Seattle, Seattle-Tacoma International Airport Master Plan Update Improvements, December 2000 (AR 048591, project 556-2912-001). Covers wetland delineation and descriptions, Miller Creek Basin, Des Moines Creek Basin, Gilliam Creek, South Aviation Support Area (SASA), runway safety area extensions, South 154th Street relocation, on-site borrow source areas, natural resource impacts to wetlands, streams, floodplains, drainage channels, water quantity and water quality, Vacca Farm mitigation, in-basin and off-site mitigation projects, monitoring plan, adaptive management, and contingency measures.

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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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