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Port of Seattle webpage (AR028013) describing Third Runway construction progress at Seattle-Tacoma International Airport (Sea-Tac Airport). Details include delivery of fill material via temporary on/off ramps connecting South 176th Street and Highway 509, construction of retaining walls, stormwater detention pond, timber noise wall, and shoulder widening along SR-509. Contract for 1.9 million cubic yards of fill awarded to City Transfer of Kent; additional 485,000 cubic yards pending environmental permit approval from regulatory agencies.

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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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