SW Andover St Pedestrian and Bicycle Bridge

Updated November 23, 2021

What's Happening Now?

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Construction is underway

While we are working on the SW Andover St Pedestrian and Bicycle Bridge (Andover Bridge), it is closed to the community. Please see the detour route for people walking and biking below. The detour route uses SW Avalon Way, Fauntleroy Way SW, and 35th Ave SW to get to either side of the bridge. As you plan your alternate route while the bridge is closed, please let us know if you would like our assistance in travel planning to get around your neighborhood.  

We began construction in mid-October are on schedule to complete construction in the next two months. We appreciate your patience and look forward to reopening the bridge as soon as work is done and it's ready for use again.   

Current construction activities

Installing new bridge expansion joints, which allow the concrete to naturally expand and contract without cracking

Crews installing new bridge expansion joints

Strengthening the east side of the bridge where it is secured to the ground

Crews installing a test anchor to ensure that the east side of the bridge is anchored into the existing soil

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)