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SR 520 - Montlake Phase

The next phase of construction for the SR 520 Program is the Montlake Phase. This is the first stage of construction for the Rest of the West. The Montlake Phase will build a new Montlake interchange, a landscaped lid over SR 520, a bicycle/pedestrian "land bridge" east of the lid, and a West Approach Bridge South for eastbound traffic. This phase is currently in the contractor-procurement stage. We anticipate selecting a contractor by fall 2018 and launching construction later in the year.

Final traffic management plan for the Montlake area
Check out the final Neighborhood Traffic Management Plan (pdf 4.3 mb) for the Montlake Phase. This plan, developed by WSDOT and the city of Seattle, includes a refined list of traffic-calming measures planned in the Montlake area, as well as a summary of public feedback and an overview of other city projects in the vicinity.

Missed the Nov. 16 Voluntary Submitters Meeting? Materials available online 
WSDOT hosted a Voluntary Submitters Meeting for interested contractors regarding the SR 520 Montlake Phase on Nov. 16 in Seattle. Meeting materials are now available online. Click here for additional information.

Design renderings

Conceptual image of the Montlake lid transit station.

Conceptual image of a bicycle-pedestrian land bridge over SR 520.

Montlake Phase timeline and next steps

• 2017-18: Advance conceptual design
• Fall 2018: Select design-build contractor
• Fall 2018: Conduct preconstruction outreach
• Late 2018: Launch construction activities
• 2022-23: Complete Montlake Phase construction 

Note: There will be additional design work for future project phases, such as the Portage Bay Phase, with additional opportunities for public comment.

Rebuilding the corridor in stages

map phased opening of new lanes in Seattle
View a map of phased lane openings in Seattle. (pdf 1 mb)

How to stay involved

We know there is interest in staying informed about this upcoming work. Here are some resources you can use:

• Email:
• Phone: 206-770-3554 (M-F, 8 to 5)
• Email updates: Subscribe
• Twitter: @wsdot_520

If your organization is interested in receiving a project briefing or presentation, please contact us.

A commitment to fair contracting

WSDOT is committed to meeting the governor's voluntary goal of providing 26 percent of the contract value for Connecting Washington transportation projects -- including the Montlake Phase of SR 520 construction -- to minority-owned, women-owned, veteran-owned and disadvantaged small businesses. Learn more about the SR 520 Diversity Program.