SR 518 Bus Rapid Transit Station Design-Build Project

The Washington State Department of Transportation is seeking a design-build contractor for the SR 518 Tukwila International Boulevard Bus Rapid Transit Station Project, including roadway modifications, bus-only lanes, a pedestrian bridge, and a fish passage structure, with an estimated value of $125 million to $165 million.

Washington > Washington State Department of Transportation


General
Open
XE3770
Nov 17, 2026 07:59 AM
Aug 31, 2026 12:00 PM
$165,000,000.00
Disadvantaged Business
Request for Proposal (RFP)
State
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Original Solicitation Links
Contact
sr518_tibs@wsdot.wa.gov
+14254502570
Description

The Washington State Department of Transportation is procuring a design-build contract for a Bus Rapid Transit station on SR 518 connecting an existing light rail station with communities to the south. Scope 1 includes roadway modifications, new bus-only lanes, a pedestrian bridge, and related transit facilities. Scope 2 includes construction of a fish barrier correction structure under SR 518. The project is federally funded in part and includes Federal Transit Administration requirements, on-the-job training hours, and Disadvantaged Business Enterprise participation goals, which are to be determined or may change. The estimated total contract value is $125 million to $165 million, with approximate values of $100 million to $130 million for Scope 1 and $25 million to $35 million for Scope 2. The procurement is planned as a design-build contract.

Classification Codes
NAICS237310Highway, Street, and Bridge Construction
PSCY1LBCONSTRUCTION OF HIGHWAYS, ROADS, STREETS, BRIDGES, AND RAILWAYS
Smart Codes
bus rapid transit constructionhighway roadway constructionpedestrian bridge construction
Specifications
Service
Timeline
Sep 28, 2026-Publication Date
Sep 29, 2026 05:00 PM-Optional Pre-Bid Conference (optional)
The conference will familiarize bidders with existing conditions inside structures to be removed; the specific meeting location is not provided.
Nov 17, 2026 07:59 AM-Submittal Due Date
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