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Port of Seattle presentation to the Highline Forum on September 23, 2026, providing an update on the Part 150 Noise and Land Use Compatibility Study for Sea-Tac Airport. Covers Part 150 study basics under CFR 14 Part 150, FAA Airport Improvement Program (AIP) grant funding requirements for sound insulation and noise abatement projects, the 65 dB Day/Night Level (DNL) noise contour mapping requirement, Noise Compatibility Program work underway, and study schedule and next steps. FAA-approved mitigation measures become eligible for AIP funding at approximately 80%.

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Upcoming Events

Part 150 NCP Workshop — Burien
Add to CalendarMSaturday Oct 17: 10:00am

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
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Part 150 NCP Workshop — SeaTac
Add to CalendarMMonday Oct 19: 6:00pm

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
[...]
Part 150 NCP Workshop — Des Moines
Add to CalendarMTuesday Oct 20: 6:00pm

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
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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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