Sunset Bridge Demolition & Reconstruction

Completed Sunset Bridge Traffic Mobility | Completed Sunset Bridge, South View

• Rendering of Utilities Under Sepulveda Bl
• Sunset Bridge Reconstruction Closures
• Fact Sheet
• Detours
• Freeway Closures
• Sunset Bridge Reconstruction in the News

The I-405 freeway cannot be widened through the Sepulveda Pass unless the Sunset Bridge is lengthened to accommodate the highway’s additional width, so before the benefits of the I-405 Sepulveda Pass Improvements Project can be delivered, the bridge must be demolished and reconstructed.

When completed, the expanded, seismically enhanced Sunset Bridge will be widened by approximately 30 feet. It will contain additional lanes to improve area traffic flows, and its columns will be repositioned to accommodate the additional freeway lane created by the project. The new bridge will be approximately five feet higher than the existing one and will contain a new water line, underground power lines and other improved utility infrastructures.

Phase I

Demolition of the southern side of the bridge took place over nine-nights, beginning
July 23, 2010 Reconstruction of the southern side of the bridge was completed on October 14, 2011, as part of the 14-day closure of the southbound I-405 on-ramp for eastbound Sunset Bl traffic.

Phase II

Demolition activities for the northern side of the bridge are scheduled for 12 nights, starting October 31, 2011. Demolition follows completion of the 14-day closure of N. Church Ln to raise the street level to match the higher Sunset Bl Bridge.

The Sunset Bridge will be closed nightly during the nights of demolition, with freeway and parallel street closures occurring as well.

The I-405 freeway and Sepulveda Bl will not, however, close simultaneously. During reconstruction, the Sunset Bridge will accommodate two lanes of traffic in each direction after demolition. Access will always be provided for emergency responders.

Rebuilding the northern side of the bridge will take approximately 12 months. It will be demolished and rebuilt in the same manner used for the now completed southern side of the bridge.

Getting a jump on reconstructing the bridge, building the bridge’s footings will commence with pile driving soon after demolition is complete.

Sunset Bridge reconstruction includes replacing the northbound Sunset Bl on and off-ramps. Ramp reconstruction will continue through 2012 and 2013.

To try and minimize its effects on project neighbors, the I-405 Sepulveda Pass Improvements Project will continue to closely coordinate its construction with
other agencies’ tasks in the Sepulveda Pass.

We encourage you to visit this site frequently for updates. Photos documenting the progress of construction can be viewed in the project’s Photo Gallery.