Bronson Way bridge to close for construction starting Sept. 23

The bridge will be closed for six weeks and will temporarily affect southbound on-ramps to I-405, 169, Sunset and Bronson.

From Sept. 23 to Nov. 4, the Bronson Way bridge in Renton will be closed for painting and an eventual seismic retrofit.

For the next six weeks, this first phase of work on the bridge, which goes over the Cedar River, will include installing access for workers and containment systems, removing existing paint, and repairing damage from corrosion. A new protective paint system will be applied.

Suggested detour routes have been established, and northbound traffic on Main Avenue South and eastbound traffic on South 3rd Street will both turn onto Houser Way.

Southbound traffic will be detoured westbound onto North 4th Street and then southbound onto Logan Avenue.

According to the City of Renton, WSDOT will have the southbound I-405/169/Sunset/Bronson on-ramp closed at night for the first week of construction.

Phase two of the construction work is expected to resume in early 2023 and will include bridge repair work, the seismic retrofitting and installing a new asphalt pavement.

Built in 1939, the Bronson Way bridge was last painted in 1999 and has never had a seismic retrofit, which would make the bridge resistant to earthquakes, soil failure and other ground motion.

Updates on the project can be found on the City of Renton website where residents are able to sign up for an e-newsletter on the project updates. A construction hotline can be reached at 425-224-2449.

Due to the Bronson Way bridge closure, drivers are encouraged to follow the detours detailed on this map. Image courtesy of the City of Renton.

Due to the Bronson Way bridge closure, drivers are encouraged to follow the detours detailed on this map. Image courtesy of the City of Renton.