This July 2019 briefing presented to the Highline Forum outlines Sea-Tac Airport's sound mitigation efforts under the FAA's Part 150 program, a voluntary federal framework that helps airports address noise and land use conflicts while qualifying for up to 80% federal grant funding. Sea-Tac's program, which began in 1985 and has undergone three updates (most recently in 2014), has involved extensive public outreach including workshops, city council presentations, and community forums. The briefing highlights that Sea-Tac Airport has been actively working to reduce aviation noise impacts on surrounding communities for more than 30 years.

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A Port of Seattle presentation to the Highline Forum providing an overview of the FAA’s Part 150 noise and land use planning program. The briefing covers the voluntary nature of Part 150, federal funding eligibility for approved mitigation measures, and Sea-Tac Airport’s history of noise mitigation dating back to 1985.

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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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