Notes
Chapter 5 of the 2024 Draft Environmental Assessment (EA) for Seattle-Tacoma International Airport (Sea-Tac Airport) Sustainable Airport Master Plan (SAMP) Near-Term Projects, prepared by Landrum & Brown, October 2024. Covers cumulative impacts analysis per CEQ definition (40 CFR § 1508.1), including past actions (2017–2021), present projects (complete by 2025), and reasonably foreseeable future projects (2026–2032) within the General Study Area (GSA), 65+ DNL noise contour, and Short-Term Study Area (STSA). Past actions listed include South Airport Access/SR 509 Corridor Completion, D-Concourse Annex, Alternate Utility Facility, Aloft Hotel, Residence Inn by Marriott, North Satellite Phase 1, and the 250 Degree Westerly Turn (Burien Turn). Projects involving cities of Burien, Des Moines, Kent, SeaTac, Seattle, Tukwila, King County, Normandy Park, and Federal Way are considered. SAMP Long-Term Vision (LTV) projects excluded as speculative. SEPA, DNS, CATEX, and Capital Improvement Plan (CIP) references included.