TagPart 150(263)

This exhibit from the Seattle-Tacoma International Airport 14 CFR Part 150 Study maps the existing 2013 baseline noise exposure contours around Sea-Tac Airport, showing DNL 65, 70, and 75 dBA noise zones across surrounding communities including SeaTac, Burien, Des Moines, and Tukwila. The DNL 65 dBA or greater contour covers approximately 5.9 square miles, encompassing an estimated 1,887 housing units and roughly 4,879 residents, along with 9 noise-sensitive facilities such as schools, churches, and hospitals. Notably, no housing units fall within the higher-impact DNL 70 dBA or above zones, though significant residential and commercial land uses exist within the broader 65 dBA contour area.

The Port of Seattle issued a State Environmental Policy Act (SEPA) Determination of Non-Significance for the Sea-Tac Airport Part 150 Noise Compatibility Planning Study, concluding the plan would not have a significant adverse impact on the environment. The study outlines 23 noise mitigation measures—including limiting nighttime flights, sound-insulating homes and schools, and constructing a Ground Run-Up Enclosure—aimed at reducing aircraft noise for communities surrounding Seattle-Tacoma International Airport. A 45-day public comment period was open through May 30, 2013, with the determination signed by Elizabeth Leavitt, Director of Aviation Planning and Environmental Programs.

The Highline Forum is a collaborative body representing Southwest King County cities, schools, and the Port of Seattle that meets to share information and work on regional initiatives. A March 27, 2013 meeting held at SeaTac City Hall focused on transportation topics, including the SR 509 Extension/I-5 Improvement Project and a status update on the Port of Seattle's Part 150 noise study, which directly relates to Sea-Tac Airport noise mitigation policy. The Forum operates by consensus and is governed by procedures that assign the Port of Seattle as the lead disseminator of all Forum-related information.

This map, prepared by Landrum & Brown on January 22, 2013 as part of the 14 CFR Part 150 Study for Seattle-Tacoma International Airport, shows projected future (2021) noise exposure contours around Sea-Tac Airport at DNL 65, 70, and 75 dBA levels. The contours extend across surrounding communities including SeaTac, Burien, Des Moines, Tukwila, and portions of Renton and Kent, with sensitive land uses such as schools, churches, hospitals, and residential areas identified within the noise impact zones. The study was conducted to inform noise compatibility planning and policy decisions aimed at reducing aviation noise impacts on affected neighborhoods.

This aerial map shows the area surrounding Seattle-Tacoma International Airport, including the cities of Burien and SeaTac, with runway designations 16R, 16C, and 16L marked along the western edge. Two colored flight-path or noise-contour lines — one purple and one gold — are overlaid on the map, tracing routes that extend east through residential neighborhoods, parks such as Sunset Park and North SeaTac Softball Fields, and past landmarks including Glacier High School. The map appears to be part of a noise or flight-path policy study documenting how aircraft departure and arrival corridors affect surrounding communities along SR 518 and adjacent streets.

This aerial map depicts Seattle-Tacoma International Airport (Sea-Tac) and its surrounding communities of Burien and SeaTac, showing the airport's runway layout including runways 34L and 34C, along with key roadways such as SR 99, SR 509, and various access roads. Highlighted routes in purple and orange appear to mark designated corridors or boundary lines relevant to airport planning or noise study areas. The map provides a geographic reference for understanding the airport's footprint and its relationship to neighboring residential and commercial zones.