June 5, 2025August 6, 2026

FAA Letter: Noise Exposure Maps Compliance Determination for King County International Airport – Boeing Field

Notes

FAA Seattle Airports District Office letter dated June 5, 2025, from Acting Manager Ryan C. Zulauf to Airport Director John Parrott at King County International Airport – Boeing Field (BFI), determining that the submitted Noise Exposure Maps (NEM) comply with 14 CFR Part 150 and Title 49 USC Chapter 475. The FAA approves the ‘2023 Existing Condition Noise Exposure Map’ and ‘2030 Future Condition Noise Exposure Map’ as fulfilling current and forecast year requirements under Appendix A of 14 CFR Part 150. The letter was prepared by RS&H and submitted May 1, 2025. Also includes the King County International Airport Part 150 Study Noise Exposure Maps Report dated April 30, 2025. FAA will publish a Federal Register notice; airport sponsor must publish notice three times in a newspaper of general circulation and comply with Section 150.21(d) for future map revisions.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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