West Seattle Bridge Program

Updated August 11, 2022

What's Happening Now?

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The West Seattle Bridge will reopen on September 18

We are in the final stages of repairs and testing, and we are excited to reopen the bridge. We know the closure has created big challenges. Thank you for your patience and resilience.

When the West Seattle Bridge reopens, we will lift all restrictions on the Spokane Street Swing Bridge (low bridge). It will take some time to remove restriction signs and markings, but beginning September 18, the low bridge will be open for all to use. After the reopening, we will also remove detour route signs and you should see neighborhood traffic return to normal levels in the following weeks. 

Safety is our #1 priority

We will complete comprehensive testing before reopening the West Seattle Bridge. Plus, we have a robust monitoring system in place with instruments that provide real-time details and alerts to staff overseeing the performance of the bridge. 

Bridge repairs included three key procedures: epoxy injections to fill cracks, carbon-fiber wrapping to add strength, and post-tensioning with steel cables to compress the concrete. Together, these methods rehabilitated the entire structure and will keep the bridge safe for decades to come. 

Learn more about the bridge repairs

Check out the videos below to learn more about the bridge repairs. You can also watch our full collection of repair videos on our YouTube Channel

West Seattle Bridge Program

From repairing the West Seattle Bridge, to rehabilitating the Spokane St Swing Bridge, to improving access to the low bridge for different users - and implementing more than 195 traffic mitigation projects to help make it easier and safer to get in and around West Seattle - the West Seattle Bridge Program is a major effort making improvements to infrastructure and in our communities. Let us help you navigate all the various projects that are happening as part of the program.

High Bridge Repairs 

How is the City rapidly repairing the West Seattle Bridge?

High bridge repair graphic

Low Bridge Access Policy 

Who can use the Spokane St Swing Bridge (low bridge)?

Low bridge access graphic

Reconnect West Seattle

How is the City restoring travel across the Duwamish and reducing neighborhood impacts?

Reconnect West Seattle icon

West Marginal Way SW 

What improvements are we considering along West Marginal Way SW?

West Marginal Way icon

Spokane St Swing Bridge Improvement Projects

How is the City keeping the low bridge strong and reliable? 

Low bridge projects icon

Travel Options 

What are ways you can get into and around West Seattle, and help minimize community impacts?

Travel options icon

Community Task Force 

Who is on the Community Task Force and how can I follow along? 

Community Task Force icon

Home Zone Program 

What improvements is the City making to calm traffic during the bridge closure?

Home Zone icon

Project Overview

On March 23, 2020, we closed the West Seattle High-Rise Bridge (high bridge) to all vehicle traffic. The sudden announcement to close the bridge stemmed from regular inspections that indicated accelerated growth of new and existing structural cracks. 

Historically, the high bridge is the city's most-used bridge, carrying an average of over 100,000 cars, trucks, and buses every day. The closure has caused a significant disruption to traffic in West Seattle, Duwamish Valley neighborhoods, and in Seattle as a whole. 

On November 19, 2020, Mayor Jenny Durkan announced that she instructed the Seattle Department of Transportation (SDOT) to restore travel across the Duwamish by repairing the high bridge. She also directed SDOT to continue early design work for an eventual replacement of the bridge. Watch the Mayor's announcement on YouTube.    

We are now performing the final repairs on the bridge and the bridge is expected to reopen in September 2022.

West Seattle High-Rise Bridge Alternate Routes Map

Signs are in place to guide people through the new routes over alternative crossings of the Duwamish Waterway.

West Seattle High-Rise Bridge Alternate Routes Map

Read the latest about the West Seattle Bridge on the SDOT Blog

To view SDOT blogs about the West Seattle High-Rise Bridge Program, visit sdotblog.seattle.gov/tag/west-seattle-bridge/

Project materials

Other Resources

Community Engagement

We are committed to working with the community to keep you informed of progress and milestones as we rehabilitate the bridge. We will seek your continued feedback on how to improve mobility and safety for West Seattle, as well as the South Park and Georgetown neighborhoods. Thank you to everyone who has helped us make this project better with your ongoing engagement. 

Learn more, get involved, and tell us what you think: