SW Andover St Pedestrian and Bicycle Bridge

Updated January 14, 2022

What's Happening Now?

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Concrete work paused 

There is an ongoing general strike of concrete drivers and concrete plant workers in the Seattle area involving companies that supply us with concrete for our many active construction projects. This project, and several others, have had to pause concrete paving work until the strike is resolved. 

This is a challenge, and we support a fair resolution among the parties. In the meantime, we're continuing other project work at the site and behind the scenes and will be sure to share more about the strike outcome and any impacts to this project as information becomes available. We remain hopeful that this issue will be resolved soon and that we can continue making even more progress delivering projects for our Seattle communities.

We will update the community through this webpage and our email list as soon as we have an update on the general strike and when we can begin concrete work again to complete the seismic retrofit.

We appreciate your patience and look forward to reopening the bridge after the work is done and it's ready for use again.   

Crew member updates the paint on the handrails of the Andover Bridge.

With a break from the recent winter storms and rain, a crew member updates the paint on the handrails of the Andover Bridge. 

Project overview

We're constructing a seismic retrofit of the SW Andover St Pedestrian and Bicycle Bridge (Andover Bridge), which is funded by the Levy to Move Seattle. The bridge was built in 1961, and our work will make it stronger and safer in the event of an earthquake. 

The project work includes installing new bridge expansion joints, which allow the concrete to naturally expand and contract without cracking, and strengthening the base of the east side of the bridge. We know the community depends on and loves its local bridge, so we want to ensure it's safe for many years to come.  

Photo showing the east side of the bridge

What to expect during construction

While we are working on the SW Andover St Pedestrian and Bicycle Bridge (Andover Bridge), it will be closed to the community. Construction began in mid-October 2021 and is on schedule to be completed in the next two months. We are working with the contractor to minimize impacts to the community. You can expect construction noise, vehicles, and equipment throughout this work, as well as people working on the seismic retrofit.

Planned detour route for people walking, biking, and rolling

Pedestrian detour route

Project Schedule

30% Design Complete
60% Design Complete
Final Design Complete
Construction begins Mid-October 2021
Construction ends Expected early 2022

*Schedule is subject to change.


This project is an example of SDOT delivering on its commitments to voters and putting Levy to Move Seattle tax dollars to work. The total project cost of the Andover Bridge seismic retrofit is $1.9 million. Upgrading this aging bridge to current earthquake safety standards was included as part of the Levy to Move Seattle package passed by voters in 2015. Approved by voters in 2015, the 9-year, $930 million Levy to Move Seattle provides funding to improve safety for all travelers, maintain our streets and bridges, and invest in reliable, affordable travel options for a growing city.

The Bridge Seismic Retrofit Program brings older bridges in Seattle up to modern earthquake safety standards. This goes above and beyond the ongoing maintenance, inspections, preservation, and repairs that we perform continually to keep Seattle bridges safe and stable. We've completed 32 bridge seismic retrofit projects over the past 30 years and have plans to complete 9 more projects by 2025. To learn more about the Bridge Seismic Retrofit Program, visit our Bridges webpage.

Get involved

We're committed to keeping you informed and working with neighbors to limit construction impacts to the extent feasible. Here are some ways to get more information about the project:

Project Materials

Construction starts postcard (October 2021)

Construction factsheet (October 2020)

Factsheet (June 2020)