October 8, 2001August 2, 2026

EXH AR007189: Declaration of Dyanne Sheldon in Support of ACC’s Motion for Stay — Section 401 Certification No. 1996-4-02325

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Declaration of Dyanne Sheldon, environmental scientist and wetland ecologist, filed in support of Airport Communities Coalition (ACC) Motion for Stay before the Pollution Control Hearings Board (PCHB), Case Nos. 01-133 and 01-160, against State of Washington Department of Ecology and Port Of Seattle. Concerns Section 401 Certification No. 1996-4-02325 and CZMA concurrency statement issued August 10, 2001, reissued September 21, 2001. Sheldon details 20+ years of wetland ecology expertise, her role as King County’s first wetland planner (1983–1988), creation of the first wetland rating system, buffer and setback requirements, and compensatory mitigation requirements in the Pacific Northwest, and her contributions to Washington State Department of Ecology wetland management policy including the State Model Wetland Ordinance and Wetland Rating System for Western Washington.

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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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