January 2, 2002August 2, 2026

Exhibit AR026605: Port Of Seattle Master Plan Update Improvements — Summary of Changes to Natural Resources Mitigation Plan (Auburn Grading Plan, June 28, 2001)

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Port Of Seattle Seattle Master Plan Update Improvements document (AR026605, DOE 1/4/02 054) summarizing changes to the Natural Resources Mitigation Plan (NRMP) made to comply with Water Quality Certification #1996-4-02325, September 21, 2001. Addresses revised Auburn Grading Plan dated June 28, 2001, covering culvert installations, wetland crossings, drainage swales, sedimentation ponds, maintenance pathways, stormwater impoundment, and geotextile-lined drainage ditches. References Sheets C4, C5, C7.1, C8, Appendix E of NRMP, and notes regarding wintering bald eagles, canary grass removal, hydroseed mix specifications, and phased planting schedules for Auburn wetland mitigation site.

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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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