September 25, 2000August 2, 2026

Preliminary comments (Set 2) on August 2000 Stormwater Management Plan for Seattle-Tacoma International Airport Master Plan Update improvements

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A letter from Bill Rozeboom to Gordon White at the Washington State Department of Ecology providing the second set of preliminary review comments on the August 2000 Stormwater Management Plan for the Sea-Tac Airport Master Plan Update. The letter focuses on inadequate assessment of project impacts to stream base flows and seepage flows to wetlands, arguing that the SMP provides conflicting information and fails to propose sufficient mitigation. The author presents hydrologic modeling data showing that groundwater inputs to Miller Creek would be significantly reduced, contradicting the Port of Seattle’s claims.

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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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