TagPart 150(118)

In January 2019, the City of Burien, Washington considered Resolution No. 407, a measure drafted by the Burien Airport Committee to address noise pollution from nearby Sea-Tac Airport. The resolution highlighted that the airport's rapid growth had caused serious health, environmental, and economic harm to Burien residents, with current FAA noise level standards far exceeding the safer thresholds recommended by the World Health Organization. The Burien Airport Committee recommended adoption of the resolution, which called for updated noise impact assessments and greater consideration of off-site noise effects.

This white paper analyzes the noise-related provisions of the FAA Reauthorization Act of 2018 (H.R. 302), which reauthorized the FAA through fiscal year 2023 and included 14 provisions directly or indirectly addressing aircraft noise. Key measures require the FAA to study alternative noise metrics to replace the Day-Night Average Sound Level (DNL) standard, update Noise Exposure Maps when operations change significantly, and consider dispersal headings for new flight procedures to reduce community noise impacts. Seattle is among the cities specifically identified for a health impacts study related to aviation noise, making these provisions particularly relevant to Sea-Tac Airport stakeholders.

This document presents a community challenge to the FAA's environmental review (CATEX) of new flight routes near Seattle-Tacoma International Airport, arguing that the FAA's own noise analyses show significant noise increases in the surrounding General Study Area that exceed the agency's own significance thresholds. The authors contend that the FAA could not rely on the outdated 2013-2018 Port of Seattle Part 150 noise study, and that the FAA's independent analyses revealed noise level jumps ranging from 5.2% to nearly 60% across various decibel contours. The document concludes that the FAA's declaration of 'no noise impacts' is implausible given data showing that portions of previously quiet neighborhoods now experience non-compatible land use noise levels above 65 dB DNL.

This FAA information sheet explains two main ways airports and communities can work together to address aircraft noise: the formal Part 150 Noise Compatibility Program, which follows federal regulations and can unlock federal funding for solutions like sound insulation, and Community Roundtables, which are voluntary ongoing forums where neighbors, airlines, and airport representatives discuss a broad range of noise and airport concerns. While Part 150 studies are structured, time-limited processes that result in an approved Noise Compatibility Plan, roundtables operate continuously under their own bylaws without a defined end date. The FAA recommends that airports consider using both approaches together for the most effective community engagement.

This FAA information sheet explains two main ways airports and communities can address aircraft noise concerns: the formal Part 150 Noise Compatibility Program, which follows federal regulations and can unlock funding for solutions like sound insulation, and Community Roundtables, which are voluntary ongoing forums for broader dialogue between airports, airlines, the FAA, and neighboring communities. The document compares the two approaches across key factors such as goals, FAA involvement, geographic scope, funding, and expected outcomes, noting that both methods can work together effectively. Airports like Sea-Tac may use one or both strategies to reduce noise impacts and keep community members informed and engaged.

In an October 2017 email, Burien Advisory Committee member Sharyn writes to council members Nancy Tosta and Debi Wagner to propose revisions to a draft council resolution concerning Sea-Tac Airport noise and growth. She argues that Sea-Tac's 2013-2018 Part 150 Study severely underestimated actual flight operations by 51%, which has minimized noise mitigation efforts for South King County residents. She calls for updated noise modeling, a reduction in operational levels, and an end to flights over Seahurst, warning that without immediate action, residents could face nearly 1,500 additional flights per day by 2025 with no mitigation relief for another decade.

In an October 2017 email to Burien City Council members, resident Sharyn Parker critiques a letter from Port of Seattle Chairman Tom Albro defending Sea-Tac Airport's expansion and noise mitigation efforts. She argues that Albro's response fails to address the real-world impacts of rapidly increasing flight operations—including a 9% annual average flight increase—on surrounding communities, and that the Port's noise modeling data is outdated and understates actual activity by 51%. Parker calls on the Council to challenge what she characterizes as the Port's lack of candor and possible intentional underestimation of flight projections to avoid costly noise and air quality mitigation requirements.

A Title 14 CFR Part 150 Final Noise Exposure Map Report for JFK International Airport prepared by Environmental Science Associates and other consulting firms for the Port Authority of New York & New Jersey. The report addresses federal aviation noise regulations and mapping requirements.