Bronson Way Bridge - Seismic Retrofit and Painting

Bronson Way Bridge Open

• As of early afternoon on Wednesday, July 12, Bronson Way S between N Riverside Drive and Mill Avenue S is open to all travelers following successful completion of bridge maintenance work.
• The remaining work is minor and will not require a full bridge closure. However, temporary single-lane closures and/or sidewalk closures may be needed.
• The Cedar River Trail near Bronson Way S is now open to walkers and bikers.

Project Hotline: 425-224-2449

Project Email: bronsonbridgeconst@stephersonassociates.com

Before and After Photos - Phase II and III

Project Description

Bridge preservation, seismic retrofit and painting of the Bronson Way Bridge, a three span bridge over the Cedar River, located in downtown Renton. The main span (span 2) consists of two steel plate girders connected by steel deck beams supporting the bridge deck.

Contractor: Construction, Inc.

Construction Estimate: $2.5 million (rounded)

This Project in This Week in Renton (TWIR)

• TWIR- July 12, 2023
• TWIR- May 12, 2023(PDF, 746KB)
• TWIR - May 5, 2023(PDF, 831KB)
• TWIR Sept. 22, 2022(PDF, 788KB)

Completed Construction

Work Element (1) - Bridge Painting

Steel main span:

• Installation (and removal) of temporary work access and containment system
• Removal of existing paint system
• Sealing and/or repair of areas with pack rust
• Application of new protective paint system (zinc primer, intermediate, color finish)

Work Elements (2) - Seismic Retrofit & (3) Deck Maintenance

Seismic retrofit activities for steel main span included:

• Temporarily elevate using hydraulic jacks
• Remove existing rocker and fixed bearings
• Install new elastomeric bearing pads on new concrete bearing pedestals

Maintenance activities for bridge deck included:

• Remove existing asphalt overlay wearing course
• Repair underlying concrete deck (as needed)
• Remove existing steel slide plate expansion joints
• Repair existing concrete curbs
• Adjust bridge drain inlet grates
• Install new compression seal expansion joints
• Install new waterproofing membrane on concrete deck
• Install new asphalt overlay wearing course on concrete deck

Before and After Photos - Phase I

Bridge History

The Bronson Way Bridge was built in 1939 by the Washington State Department of Transportation (WSDOT). In January 2018, ownership of the bridge was transferred to the City of Renton from WSDOT with the execution of the Turnback Agreement TB 1-0254 for State Route (SR) 900 through downtown Renton. Prior to the ownership transfer, the steel members were repainted by WSDOT on a cycle of approximately every 20 years, the last time being 1999. In 1978, the existing concrete deck was repaired and a water proofing membrane and asphalt overlay (wearing course) were installed on top, to protect the concrete deck from tire wear and water intrusion. Since 1939, no seismic improvements have been performed on the bridge.

Additional Project Information

• Feb. 6, 2023 Transportation Committee Presentation(PDF, 8MB)

Email Updates

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