September 1, 2025August 9, 2026

Seattle-Tacoma International Airport Environmental Assessment for the Sustainable Airport Master Plan Near-Term Projects: Chapter 1, Introduction and Purpose & Need

Notes

Chapter 1 of the Final Environmental Assessment (EA) for the Seattle-Tacoma International Airport (SEA) Sustainable Airport Master Plan (SAMP) Near-Term Projects (NTPs), dated September 2025. Prepared under NEPA (42 USC § 4331), FAA Orders 1050.1F and 5050.4B, with USACE participating as cooperating agency. Covers 31 proposed airfield and terminal projects including Taxiway A/B Extension (A01), Runway 16R/34L Blast Pads (A02), Taxiway C/D Reconfiguration and Runway Incursion Mitigation (A03), Taxiway B 500-foot Separation (A04), and North Hold Pad (A05). EA initiated July 30, 2018; opening year for NTPs determined to be 2032 following COVID-19 deferral. FAA will issue FONSI/ROD or require EIS. Port of Seattle is project sponsor; FAA Reauthorization Acts of 2018 (P.L. 115-254) and 2024 (P.L. 118-63), EO 14173, EO 14154, and Seven County Infrastructure Coalition v. Eagle County (2025) cited.

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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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Meeting Agenda 10:00 a.m. – 10:15 a.m. | Welcome – Evan Nordby, Chair a. Introductions and Agenda Reviewb. Status of appointments and non-voting member invitationsc. Other updates as necessary 10:15 a.m. – 11:00 a.m. | Is it practical and legal to operate the western Washington [Puget Sound] airports as a single airport system? – Consultant
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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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