This May 2020 update from Seattle-Tacoma International Airport outlines the status of its noise abatement and mitigation programs. Citizen noise complaints were averaging 400 per day, while the Noise Abatement Corridor saw 98% compliance and the Late Night Noise Limitation Program recorded an average of 11 exceedances per night in Q1 2020. COVID-19 delayed sound insulation construction projects for single-family homes and condominiums, pushing estimated start dates into 2021.

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A May 2020 presentation from Seattle-Tacoma International Airport summarizing the status of noise abatement and noise mitigation programs. It covers citizen complaint volumes, corridor compliance rates, engine testing violations, late-night noise exceedances, and the Fly Quiet Program. It also notes COVID-19 delays to sound insulation construction timelines for single-family homes, condominiums, and the Acceleration program.

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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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