TagNoise Mitigation(259)

Chapter 53.54 RCW authorizes Washington port districts operating large airports (such as Sea-Tac) to carry out programs that reduce the impact of jet aircraft noise on surrounding neighborhoods, including purchasing properties, providing soundproofing, and offering transaction assistance to affected homeowners. The law defines 'impacted areas' with specific distance limits from runways and allows properties within those boundaries to receive noise mitigation benefits. Recent 2024 updates expand the program to allow inspection, repair, or replacement of previously installed noise mitigation equipment that is no longer working as intended or has caused structural damage.

The Port of Seattle mailed this notice to residents near Sea-Tac Airport informing them about the Sound Insulation Repair and Replace Pilot Program, which aims to address aircraft noise in affected homes. Recipients were advised that a formal survey about the program would be mailed to them in early June. Program information and resources are available in multiple languages at www.portseattle.org/sound-insulation.

Former King County International Airport (BFI) Noise Officer Sharyn Parker's prepared notes for a GAO interview outline significant concerns about FAA regulatory failures and Sea-Tac Airport's inadequate noise mitigation practices in the Seattle region. Parker argues that the FAA has consistently failed to require Sea-Tac to update noise exposure maps, enforce timely sound mitigation programs, or conduct meaningful public outreach — particularly for minority communities disproportionately affected by flight path changes like the Greener Skies/RNP initiative. The notes also highlight contradictions between Sea-Tac's deliberately low flight-operation projections in its Part 150 noise studies and the far higher growth figures used in its capital development plans.

Handwritten notes reviewing an FAA document on airport grant assurances, referencing noise mitigation policy and Kandahar Corridor Syndrome (KCS). The notes criticize the postponement of noise mitigation efforts in favor of the SAMP (Sustainable Airport Master Plan), quoting language suggesting 'little or no downside for the clients' and expressing concern that passengers and airlines are being prioritized over local communities. A URL referencing FAA airport grant assurances (airport-sponsor-assurances-aip(1).pdf) is also included.

This document details noise-related Airport Improvement Program (AIP) grants awarded to Seattle-Tacoma International Airport (Sea-Tac) from 2002 through 2015, covering purposes such as noise mitigation for residences and public buildings, land acquisition for noise compatibility, and noise compatibility plan studies. Grant amounts range from hundreds of thousands to over eleven million dollars, targeting properties within various Day-Night Level (DNL) noise contours of 65-69 and 70-74 DNL. An accompanying federal assistance application (SF-424) shows a 2015 grant totaling approximately $4.8 million for property acquisition, relocation, and sound insulation, signed by Port of Seattle's Managing Director of Aviation.

This legislative summary outlines a proposed bill to protect communities near busy flight routes from aviation noise and pollution. It establishes a process for the FAA to designate 'aviation-impacted communities' located within one mile of low-altitude commercial or cargo flight paths, create local community boards to engage with the FAA and airport operators, and develop action plans and mitigation funding for affected residents. Key provisions include grants for sound insulation and noise barriers, eligibility for neighborhoods within a 55 DNL contour, and requirements for the FAA to respond to community concerns within set deadlines.