Caltrans District 4 Press Release

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Historic Bay Bridge Demolition Continues

Second 504’ Truss Span to be Lowered

Date: April 6, 2016
District: District 4
Contact: Leah Robinson-Leach
Phone: (510) 715-6730
Contact: Tamie McGowen
Phone: (916) 657-5060


OAKLAND – Caltrans continues its progress on the historic removal of the original east span of the San Francisco-Oakland Bay Bridge. Starting later this week, crews will begin lowering the second 504-foot truss span. The significant event is scheduled to take place over a two-day period, April 8th and 9th .

The lowering and dismantling process is extensive and complicated; quite different from the simple methods used to build the truss spans in 1935, during the original construction.

A combination of history and construction, this is the second of the original five 504’s that stretch from Pier E4 to Pier E9, equivalent of approximately one half mile.

"The lowering of the second 504’ truss is another step in the direction of continued construction and environmental success."

Dr. Brian Maroney, Chief Bridge Engineer, Caltrans Toll Bridge Program

Much like the lowering of the first truss in February, day one of the project will focus on the actual lowering of the truss and the second day; will concentrate on setting the truss down on barges and transporting it to the Port of Oakland for disassembly. Each day is expected to take anywhere from 12 to 14 hours. The lowering operation is highly weather dependent. Heavy rains and/or high winds could cause changes in scheduled activities.

This is the second part in a three part process to dismantle the Old Bay Bridge. Phase I was completed the end of 2015, with the demolition of the cantilever section and S-curve to Yerba Buena Island.

The lowering of the 504s is a slow and methodical operation compared to the 6- second implosion of Pier E3 ( that was performed in mid-November. Although these are very different operations, environmental measures have been priorities for both. Contractors continue to work closely with a bird deterrence contractor and engineers to coordinate activities.

Time Lapses from the First 504’ Lowering high resolution

This video can also be viewed at:

The bike path will be closed to the public on both days of the operation.


Old Bay Bridge Demolition Links

Contact Information

Physical Address:

California Department of Transportation
District 4
111 Grand Ave
Oakland, CA 94612

General Information:

Main Phone Line: (510) 286-4444

Alejandro Lopez
Bay Bridge Spokesperson
Caltrans District 4
Phone: (510)286-5445

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