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Section 1: Introduction — Study of the Current and Ongoing Effects of the Operation of the Seattle-Tacoma International Airport

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A 2020 Washington State study, funded by the legislature and six nearby cities with a combined $600,000 budget, examines how Seattle-Tacoma International Airport's operations have historically affected surrounding communities including Burien, Des Moines, Federal Way, Normandy Park, SeaTac, and Tukwila. Unlike a similar 1997 study that projected future impacts from a proposed third runway, this study reviews historical data from 1997 to 2019 to establish a baseline of airport-related impacts across a range of metrics. The study area covers about 61 square miles and is home to over 237,000 residents, a population density roughly 3.3 times greater than the King County average.

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Section 1 (Introduction) of the 2020 Stantec study commissioned by the Washington State Department of Commerce under ESSB 6032, evaluating the current and ongoing effects of Seattle-Tacoma International Airport operations on surrounding communities. Covers the legislative basis (ESSB 6032, Section 127(63), enacted 2018), the $600,000 funding split between state and six airport-area cities (Burien, Des Moines, Federal Way, Normandy Park, SeaTac, Tukwila), and the distinction between this 2020 study and the 1997 Sea-Tac International Airport Mitigation Study regarding the Third Runway. Includes Figure 1.1 study area map and Figure 1.2 table of study area cities covering 61.36 square miles and 237,498 residents (10.7% of King County population). Consultant team led by Stantec with Denver-based Ricker Cunningham.

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