Notes
Draft SEPA Environmental Impact Statement (EIS) Chapter 3, Affected Environment, for the Seattle-Tacoma International Airport (Sea-Tac Airport) Sustainable Airport Master Plan (SAMP) near-term projects, May 2026. Describes baseline conditions as of 2022 under WAC 197-11-444 within the General Study Area (GSA) encompassing 3,692 acres (5.8 square miles) in the City of SeaTac, King County, Washington. Airport bounded by SR 99, SR 509, S. 142nd Place, and S. 200th Street on approximately 2,800 acres. Incorporates by reference the NEPA EA Section 3, Affected Environment. GSA loosely bounded by S. 140th Street, 33rd Avenue S., S. 20th Street, and Des Moines Way. Nearby cities include Burien, Des Moines, Normandy Park, SeaTac, Tukwila, Federal Way, Kent, and Seattle. Washington Growth Management Act urban growth area designation (RCW 36.70A). Port of Seattle project.