Notes
Chapter 2 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. Describes the two-step alternatives screening process conducted under NEPA, CEQ regulations, FAA Order 1050.1F, and FAA Order 5050.4B. Table 2-1 evaluates scoping-suggested alternatives including Phased Construction of Passenger Gates, Terminal Processing Facilities, Roadway and Curbside Changes, Fully Comply with Taxiway Separation Requirements (500-foot separation between Runway 16L/34R and Taxiway B), Limited or Reduced Growth, Use of Other Existing Airports, Build a New Airport, Utilize Other Modes of Transportation (high-speed rail, hyperloop, mass transit), North Employee Surface Parking Lot L06 elimination, Public/Private Transit Incentives, and Terminal Connection (secure-side post-security connection). Section 2.4 describes the No Action Alternative, including North Satellite Redevelopment, International Arrivals Facility, Terminal Renovations, C Concourse Expansion, A Concourse Building Expansion, Widen Arrivals Drive, and Runway Renumbering as future base case projects. Purpose and Need threshold is serving 56 MAP at optimal Level of Service (LOS).