City of Burien Memorandum: South King County Airport Impact Assistance and Mitigation Studies

A 1996 City of Burien memorandum outlines preliminary findings from a regional study on the socio-economic and environmental impacts of Sea-Tac Airport's proposed expansion and third runway. Estimated mitigation costs for five South King County cities totaled $3.05 billion over twenty years, with Burien alone facing roughly $800 million in costs and over $190 million in single-family property value losses by 2020. The study argues that because the airport's benefits are spread across the broader Puget Sound region while its costs—including noise, traffic, and a reduced tax base—fall disproportionately on a handful of nearby communities, targeted mitigation funding is both an equity issue and a necessity.

Notes

Memorandum dated October 21, 1996 from City Manager Frederick C. Stouder to Burien Mayor Arun Jhaveri and City Council members presenting preliminary findings from the Burien–South King County Airport Impact Assistance and Mitigation Studies Team regarding Sea-Tac Airport third runway expansion impacts. Total preliminary mitigation costs over 20 years: $3.05 billion for environmental and transportation impacts across five cities (Burien, Des Moines, Federal Way, Normandy Park, Tukwila); City of Burien share approximately $800 million. Single-family property value loss in Burien projected at $120,881,357 in year 2000 and $190,393,350 in year 2020 (1995 dollars), per Draft Sea-Tac Mitigation Study Table 4-5, page 38. Average annual property value reduction for all cities totals $500.1 million; Burien’s share is $206.5 million. Cumulative general property tax revenue loss across studied cities from single-family property: $22,520,039 over 20 years. Includes Chapter 1–4 of Socio-Economic Impact Analysis on equity issues and geographic distribution of SEA-TAC benefits vs. costs, referencing 1991 Origin/Destination study by Evans-McDonough Company for Port Of Seattle.

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