SAMP Near-Term Projects Draft EIS: Chapter 1, Introduction and Purpose & Need

The Port of Seattle is preparing an Environmental Impact Statement (EIS) under Washington State's Environmental Policy Act (SEPA) for 31 near-term construction and improvement projects at Seattle-Tacoma International Airport (SEA). These projects, drawn from the airport's 2018 Sustainable Airport Master Plan, aim to improve passenger facilities, safety, efficiency, and airport access ahead of a projected 2032 completion date. The review follows a completed federal environmental assessment and addresses the region's growing air travel demand while evaluating potential environmental impacts and mitigation measures.

Notes

Draft SEPA Environmental Impact Statement Chapter 1 for Seattle-Tacoma International Airport (Sea-Tac Airport) Sustainable Airport Master Plan (SAMP) Near-Term Projects (NTPs), published May 22, 2026 by the Port of Seattle. Covers purpose and need, background planning process, 31 NTPs, Long-Term Vision, environmental review timeline including NEPA EA (Final EA September 2025, FONSI/ROD September 24, 2025), and SEPA scoping (closed September 28, 2018). References WAC 197-11-400, RCW 43.21C, FAA involvement, COVID-19 impacts on project timeline, 2032 opening year for NTPs, Puget Sound Regional Council Regional Aviation Baseline Study, and Port of Seattle Century Agenda (approved December 2012).

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