TagWSDOT(61)

A November 2022 WSDOT presentation by Construction Manager Andrey Chepel outlines progress on the SR 509 Completion Project, part of the broader Puget Sound Gateway Program in King County. The project aims to improve freight and passenger connections to the Port of Seattle and Sea-Tac Airport area by completing a long-planned highway extension. The presentation covers construction stages 1a and 1b, upcoming Stage 2 procurement, and community engagement efforts.

This document outlines regional policies for High Occupancy Vehicle (HOV) lanes in the central Puget Sound region, covering rules for lane operation, enforcement, and public education. It establishes that HOV lanes should be reserved 24 hours a day, seven days a week for buses, carpools, and vanpools, and calls for increased fines for violations and better use of technology to improve compliance. The policies were developed by the Regional HOV Policy Advisory Committee in 1998-1999 and are intended to reduce traffic volumes, lower vehicle emissions, and improve overall transportation efficiency.

Destination 2030 is a long-term regional transportation plan for the greater Seattle area that outlines both short-term investments (prior to 2010) and longer-term improvements through 2030, focusing on roadway expansions, HOV lane completions, freight network connections, and reduced traffic congestion. The plan prioritizes safety, maintenance, and optimization of existing roads before pursuing new capacity projects, while also emphasizing travel alternatives and pedestrian and bicycle improvements. Fund allocations are guided by project readiness, regional need, and consistency with local growth management policies.

This is a Washington State Joint Aquatic Resources Permit Application (JARPA) submitted by the Washington State Department of Transportation (WSDOT) for the SR 509 Stage 2 Project, which involves constructing a new expressway between 24th Avenue South and South 188th Street in the cities of Burien, Des Moines, and SeaTac, King County. The project corridor runs through publicly owned land and spans multiple sections of townships near Sea-Tac Airport. The application was received on March 24, 2022, and covers permits related to aquatic resources affected by the highway construction.

The Washington State Commercial Aviation Coordinating Commission's 2022 report to the Legislature identifies six existing airports — including Paine Field, Bremerton National, and Tacoma Narrows — as candidates for expanded aviation capacity, while also exploring potential greenfield sites for a new airport. The report summarizes public input showing that a majority of respondents support building new aviation capacity despite environmental costs, and outlines the Commission's guiding principles of public benefit, economic feasibility, environmental responsibility, and social equity. The Commission's final recommendations are expected by February 15, 2023.

This WSDOT Puget Sound Gateway Program document presents preliminary design plans for a new SR 509 expressway segment running from 24th Ave S to S 188th St through the Blueberry Lane neighborhood, spanning the cities of Des Moines and SeaTac. The plans show proposed roadway construction, stormwater treatment ponds, wetland areas, and several buildings and roads slated for demolition to accommodate the new highway alignment. Cross-sectional diagrams illustrate the elevation changes and right-of-way boundaries relative to existing neighborhoods, trails, and local streets.

A November 2021 WSDOT presentation outlines the SR 509 Completion Project, part of the broader Puget Sound Gateway Program, which aims to build new highway connections linking the region's ports and distribution centers between 2020 and 2028. The project includes several construction stages covering new expressway segments, interchange improvements at I-5/SR 516, and a Lake to Sound Trail component in the area south of Seattle near Sea-Tac Airport.

This WSDOT discussion document from November 2021 shows a planning map for the SR 509 Puget Sound Gateway Program's new expressway project, spanning from 24th Ave S to S 188th St near Des Moines Creek Park in the City of SeaTac. The map highlights the proposed highway alignment (shown in red) running adjacent to Des Moines Creek Trail Park, identifying wetland areas, contour elevations, and nearby features such as an Amazon warehouse and the Lake to Sound Trail. The project represents a major infrastructure expansion in the SeaTac area that would affect the Des Moines Creek Park corridor and surrounding natural resources.