Sustainable Airport Master Plan: Environmental Review and Airport Master Plan Fact Sheet

Seattle-Tacoma International Airport's Sustainable Airport Master Plan (SAMP), completed in 2018, outlines 31 near-term development projects and is currently undergoing a federal environmental review (NEPA) process, with a draft Environmental Assessment published in October 2024. The review evaluates potential impacts on air quality, water resources, noise, and other environmental factors before any projects move forward. Once the federal NEPA process concludes, a Washington State-level environmental review (SEPA) will follow.

Notes

Port Of Seattle fact sheet explaining the Sustainable Airport Master Plan (SAMP) status for Seattle-Tacoma International Airport (Sea-Tac Airport), including 31 Near-Term Projects (NTPs) identified in 2018. Covers the NEPA Environmental Assessment (EA) process, with the Draft NEPA EA published October 21, 2024 and public comment period ending December 5, 2024. Describes key elements of an Airport Master Plan, the NEPA and SEPA environmental review steps, Finding of No Significant Impact (FONSI), Record of Decision (ROD), and the role of public comment. Website sampntpenvironmentalreview.org listed for public engagement.

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