A June 2024 WSDOT presentation to the Des Moines Historical Society outlines the SR 509 Completion Project, part of the broader Puget Sound Gateway Program alongside the SR 167 Completion Project in Pierce County. The project aims to improve freight and passenger connections between the Port of Seattle, Sea-Tac Airport, and key regional distribution centers in King County. The presentation covers the project's history and two construction stages, with WSDOT emphasizing efficiencies gained by managing both highway projects under a single program.Open full document
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WSDOT presentation by Ward Anderson, SR 509 Project Engineer, delivered to the Des Moines Historical Society on June 25, 2024. Covers the SR 509 Completion Project in King County, including Stage 1b and Stage 2 overviews, and the Puget Sound Gateway Program, which also encompasses the SR 167 Completion Project in Pierce County. The program aims to provide essential connections to the Port of Seattle and Port of Tacoma, improve freight and passenger mobility through the Puget Sound region, and connect major ports to key distribution centers.