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Section 14: Summary — Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport

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A 2020 study evaluated the positive, negative, and neutral effects of Seattle-Tacoma International Airport on six nearby cities — Burien, Des Moines, Federal Way, Normandy Park, SeaTac, and Tukwila — using data spanning 1997 to 2019. The study found that noise was the top public concern, followed closely by air quality issues from aircraft operations, along with traffic congestion and distrust of the FAA and Port of Seattle. Researchers attempted to distinguish between impacts directly caused by airport operations and those resulting from the broader regional population growth that roughly doubled over the same period.

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Section 14 Summary (pages A-354 to A-379) of the Stantec-led 2020 study commissioned under Department of Commerce Section 14, evaluating current and ongoing effects of Seattle-Tacoma International Airport (Sea-Tac Airport) operations on six study area cities: Burien, Des Moines, Federal Way, Normandy Park, SeaTac, and Tukwila. Covers study approach (data period 1997–2019, milestone years 1997, 2009, 2019), characteristics of each study area city, and public input findings including noise, air quality, traffic congestion on U.S. Highway 99/SR-518, third runway mitigation failures, violent crime, and public mistrust of FAA and Port of Seattle. Comparable airports reviewed include Boston/Logan, Miami, and Phoenix Sky Harbor.

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