This technical memorandum, prepared by Leigh Fisher for the Port of Seattle in September 2023, presents an updated aviation activity forecast for Seattle-Tacoma International Airport. It includes constrained operating growth scenarios, FAA-approved forecast data, and airside simulation modeling documentation used to support environmental review planning at Sea-Tac.

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Technical memorandum prepared by Leigh Fisher for Port Of Seattle presenting the 2023 Aviation Activity Forecast Update for Seattle-Tacoma International Airport (Sea-Tac Airport). Serves as Appendix A (Forecast and Airport Operational Assumptions) to the SAMP 2024 Draft Environmental Assessment, covering Constrained Operating Growth Scenarios (COGS), FAA approval of the 2023 forecast update, and Environmental Review Airside Modeling Documentation (TAAM). Filed as part of the 2024 Draft EA comment period (October 21 – December 13, 2024) under the Sustainable Airport Master Plan (SAMP).

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Meeting Objectives Introduce the primary feedback themes identified by StART members regarding StART’s Operating Procedures and determine areas that may warrant future discussion. 5:00 PM – Welcome Meeting Management Welcome Lead: Andrés Mantilla, Facilitator, Uncommon Bridges; Wendy Reiter, Airport Managing Director, POS 5:15 PM – Dinner: All participants eat. 5:30 PM – StART Operating Procedures
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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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