Notes
Appendix P to the Seattle-Tacoma International Airport (Sea-Tac Airport) State Environmental Policy Act (SEPA) Environmental Impact Statement (EIS) for the Sustainable Airport Master Plan (SAMP) Near-Term Projects, Draft EIS, May 2026. Documents mitigation measures required under the FAA’s NEPA Finding of No Significant Impact/Record of Decision (FONSI/ROD) and additional minimization measures identified by the Port Of Seattle during SEPA EIS preparation. Includes a table of Category 1, 2, and 3 intersection mitigations covering intersections in City of SeaTac, City of Burien, City of Des Moines, and WSDOT jurisdictions — including Des Moines Memorial Drive at S. 168th Street, S. 144th Street, SR 518 WB Off-ramp, 8th Ave. S. at S. 156th Street, Host Rd. at S. 160th Street, 34th Ave S. at S. 160th Street, Military Rd S. at S. 164th St — specifying roundabouts, signals, turn lanes, proportionate-share payments, and future Level of Service (LOS) ratings for 2032 and 2037. References Washington State Department of Transportation (WSDOT), Westside Trail, SeaTac Transportation Master Plan Project ST 116, and Burien TIP Project #22.