October 22, 2002August 2, 2026

Exhibit 713: List of Documents and Information Relied Upon in Testimony Relating to 401 Water Quality Certification for Third Runway at Sea-Tac Airport

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Reference list compiled by Peter Willing, Ph.D., of documents relied upon in testimony regarding the 401 Water Quality Certification for the Third Runway at Sea-Tac Airport. Sources cited include studies on highway runoff chemistry, heavy metals partitioning, urban stormwater BMPs, treatment wetlands, NPDES permits, and Port of Seattle annual stormwater monitoring reports (1998–2001). Key references include Washington State Department of Ecology publications, EPA stormwater BMP data summaries, Parametrix Water Effect Ratio Screening Study at Seattle-Tacoma International Airport, Des Moines Creek Basin Plan, Herrera Environmental Consultants City of Des Moines Water Quality Monitoring Program, HNTB memoranda, and Adolfson Associates subsurface stormwater disposal facilities pilot evaluation. Document identifier AR 026429–026430.

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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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