TagPart 150(262)

In April 2000, the Des Moines, Washington City Council adopted Resolution No. 882, formally expressing its preference for the 'South Flow Two Tracks' flight path alternative proposed in the Port of Seattle's Part 150 Study. The Council found that existing flight tracks placed a disproportionate share of aircraft noise on Des Moines residents and businesses, and determined that the two-track alternative would provide the greatest noise relief. The City Manager was directed to submit the resolution to the Port of Seattle as the city's official position on southbound departure routes from Sea-Tac International Airport.

These are the minutes from a November 18, 1998 joint meeting of the Citizens' Advisory Committee and Technical Advisory Committee for the Sea-Tac Airport Part 150 Noise Study, held at Sea-Tac International Airport. The meeting covered the presentation of a preliminary noise contour map, updates on subcommittee activities related to airport operations and noise data analysis, and announcements about upcoming public events. Key discussion topics included run-ups, adherence to flight tracks, Fly Quiet programs, and how noise data would be measured and presented to the public.

This document maps the Part 150 Noise Monitoring Locations surrounding Seattle-Tacoma International Airport, as prepared by the Port of Seattle in August 1998. It identifies dozens of measurement sites categorized as permanent, semi-permanent, or temporary, spread across communities north and south of the airport including Burien, Des Moines, Normandy Park, Mercer Island, and as far north as the University District. Each site is listed with its specific street address or intersection, providing a detailed geographic record of how aircraft noise was tracked across the wider Seattle-Tacoma region.

This document contains materials from the Seattle-Tacoma International Airport FAR Part 150 Noise Study, including an agenda for a Citizens Advisory Committee meeting held on July 22, 1998, at the airport's Main Terminal Building. The meeting covered topics such as a presentation of Working Paper One on inventory, preliminary noise monitoring results, and an open house discussion. A tentative schedule for follow-up meetings through December 1998 was also included, covering sub-committee sessions and additional CAC/TAC public meetings.

Draft Working Paper One of the Seattle-Tacoma International Airport (Sea-Tac) FAR Part 150 Study, dated July 1998, prepared by Port Of Seattle. This inventory chapter updates the 1994 Part 150 program and covers airport physical facilities, air traffic operations activity, airspace/air traffic control, ANOMS radar data, current noise abatement program, noise complaint history, airport environs,

This Port of Seattle glossary defines key acoustic and air traffic control terms used in airport noise policy discussions. It explains measurements like decibels (dB), A-weighted decibels (dBA), and the Day-Night Noise Level (DNL), which is a 24-hour average used to map noise exposure around Sea-Tac Airport. It also covers Federal Aviation Regulations (Parts 36, 91, and 161) that govern aircraft noise standards, phase-out schedules for older noisy aircraft, and the process for airports to adopt new noise rules.

This document presents evidence that the Port of Seattle violated Federal Grant Assurance C.6 and Washington State law RCW 53.54.020 in connection with its FAR Part 150 Noise Compatibility Program at Seattle-Tacoma International Airport. It compiles 17 items of supporting evidence, including a 1998 congressional request for a GAO audit, state auditor correspondence, findings by Deloitte & Touche identifying violations from 1990 to 1994, and records showing the Port received over $100 million in federal funds tied to noise mitigation commitments it allegedly failed to honor. The materials illustrate the consequences for surrounding communities and governments that held land-use authority under the noise compatibility planning process.

This catalog lists documents received in 1993 related to Sea-Tac International Airport and regional air transportation policy, covering topics such as airport noise studies, environmental impact statements, and air quality plans for the Puget Sound area. Sources include the FAA, US EPA, Washington State DOE, and various consulting firms. The collection spans noise compatibility programs, aircraft deicing environmental concerns, wetlands restoration, and long-range aviation forecasts for the Pacific Northwest.

This Sea-Tac International Airport brochure, prepared by the Port of Seattle in Summer 1998, compares the noise footprints of Stage II jets, Stage III jets, and general aviation/commuter aircraft to help residents understand the noise impacts of different aircraft types. It explains that Stage III aircraft are significantly quieter than Stage II aircraft, and that replacing older Stage II planes with newer Stage III models would meaningfully reduce noise levels in surrounding communities. The document also defines key noise measurement terminology, including DNL (Day-Night Average Sound Level), and notes that nighttime flights carry a 10-decibel penalty in noise accounting.