This October 2013 final report, prepared by Landrum & Brown for the Port of Seattle, updates the noise exposure maps and noise compatibility program for Seattle-Tacoma International Airport under federal regulations (14 CFR Part 150). It assesses the impact of aircraft noise on surrounding communities and outlines strategies to reduce noise-related conflicts between the airport and neighboring land uses. The study serves as a key planning document guiding Port of Seattle noise mitigation policies at Sea-Tac Airport.

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Final report of the 14 CFR Part 150 Noise Exposure Map Update and Noise Compatibility Program Update for Seattle-Tacoma International Airport, prepared by Landrum & Brown, Incorporated for Port Of Seattle, dated October 2013. Covers noise exposure maps, noise compatibility program measures, and DNL65 contours for Sea-Tac Airport. Prepared under FAA Part 150 regulations (14 CFR Part 150).

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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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