August 10, 2001August 2, 2026

EXH AR016935: Ecology Water Quality Certification — STIA Third Runway Construction, Order #1996-4-02325

Notes

Washington State Department of Ecology (Ecology) Water Quality Certification letter dated August 10, 2001, addressed to Port Of Seattle, Attn: Elizabeth Leavitt, for U.S. Army Corps of Engineers Public Notice 1996-4-02325. Certifies that construction of a Third Runway and related projects at Seattle-Tacoma International Airport (STIA) in the Miller, Walker, and Des Moines Creek watersheds and wetlands, including mitigation site in Auburn, King County, complies with Clean Water Act Sections 301, 302, 303, 306, and 307, RCW 90.48.260, and WAC 173-201A. Includes Section 401 certification, Coastal Zone Management Act Section 307(c)(3) concurrence, and Order #1996-4-02325 governing conditions. Subject to HPA from WDFW, NPDES permit #WA-002465-1, and NPDES General Stormwater Permit #SO3-00491. References October 25, 2000 JARPA. 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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