This document outlines the public process timeline for Seattle-Tacoma International Airport's Sustainable Airport Master Plan, spanning from initial scoping in Q2 2018 through a projected NEPA Environmental Assessment final decision in Q1 2022. Key milestones include updated forecasts and alternatives analysis in early 2020, draft impact analysis sections in Q1 2021, and a public agency review period in Q3 2021. A State Environmental Policy Act (SEPA) review is scheduled to follow the completion of the federal NEPA process.

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This presentation slide outlines the public process timeline for the Sustainable Airport Master Plan (SAMP) at Seattle-Tacoma International Airport. The timeline spans from scoping in Q2 2018 through a NEPA Environmental Assessment final document and decision in Q1 2022, with SEPA to follow completion of NEPA. Key milestones include updated forecasts, alternatives analysis, NEPA EA draft and agency/public review periods.

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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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