September 21, 2001August 2, 2026

EXH AR016888: Ecology Water Quality Certification Order #1996-4-02325 (Amended-1) for Port Of Seattle Third Runway Construction at STIA

Notes

Washington State Department of Ecology Water Quality Certification Order #1996-4-02325 (Amended-1), dated September 21, 2001, issued to Port Of Seattle (attention Elizabeth Leavitt) for construction of a third runway and related projects at Seattle-Tacoma International Airport (STIA). Certifies compliance with Clean Water Act Sections 301, 302, 303, 306, and 307, RCW 90.48.260, and WAC 173-201A. Rescinds prior Order #1996-4-02325 issued August 10, 2001. Project involves Miller Creek, Walker Creek, and Des Moines Creek watersheds, wetlands at STIA, and offsite mitigation in Auburn, King County. References JARPA dated October 25, 2000, U.S. Army Corps of Engineers Public Notice 1996-4-02325, NPDES permit #WA-002465-1, NPDES General Stormwater Permit #SO3-00491, Hydraulic Project Approval (HPA) from WDFW, and Coastal Zone Management Act Section 307(c)(3). Signed by Gordon White, Program Manager, Shorelands and Environmental Assistance Program.

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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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