SEA Airport’s Sustainable Airport Master Plan (SAMP) Frequently Asked Questions

The Port of Seattle's Sustainable Airport Master Plan (SAMP) outlines 31 near-term construction projects at Seattle-Tacoma International Airport, including a second terminal with 19 gates, new cargo facilities, and roadway changes, all aimed at serving up to 56 million passengers annually by 2050. A federal environmental review (NEPA) is underway to assess potential impacts, with a 45-day public comment period opening October 21, 2024, allowing community members to submit feedback online, by mail, or at public libraries in Burien, Des Moines, and SeaTac. A separate state-level environmental review (SEPA) will follow once the federal process is complete.

Notes

Port of Seattle FAQ document covering the Sustainable Airport Master Plan (SAMP) for Seattle-Tacoma International Airport (SEA), including 31 Near-Term Projects (NTPs) targeting 56 million annual passengers. Topics include: second terminal with 19 gates, elevated busway, cargo facilities, airfield updates, sustainable aviation fuel facilities, and roadway realignment. Explains NEPA Environmental Assessment (EA) process led by the Federal Aviation Administration (FAA), 45-day public comment period opening October 21, 2024, SEPA review to follow, and a 2021 Puget Sound Regional Council Regional Aviation Baseline Study projecting 27 million additional passenger boardings per year beyond SEA capacity by 2050. Document available at public libraries in Burien, Des Moines, and SeaTac and at www.sampntpenvironmentalreview.org.

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