Notes
Chapter 4 (Environmental Consequences) of the 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. Evaluates potential environmental impacts of Alternative 1 (No Action), Alternative 2 (Proposed Action), and Alternative 3 (Hybrid Terminal Option) for analysis years 2032 and 2037. Covers air quality criteria pollutants, biological resources including Chinook salmon, Steelhead, Bull trout, Bocaccio rockfish, Yelloweye rockfish, Killer whale, migratory birds, stormwater runoff, NEPA FAA Order 1050.1F significance determinations, construction emissions, and mitigation commitments. Forecasted aircraft operations reach 475,655 and passengers 58,294,388 by 2032 under action alternatives. Comment period October 21 – December 13, 2024.