Submitted by C.C. Myers Inc.
The $141.5-million San Francisco-Oakland Bay Bridge Detour Tie-In Roll-Out/Roll-In project involved the replacement of a portion of the truss on the bridge. A 300-ft, 3,300-ton, double-deck section of the East Span was cut and removed then replaced with a seismically upgraded 3,600-ton replacement structure.
Executing the movement of two sections of bridge 150 ft in the air, at a combined weight of nearly 7,000 tons, embodies a very unique and complex heavy-engineering undertaking. Part of a long-planned seismic upgrade by the California Department of Transportation, this massive retrofit project was performed to create a .5-mi connection between the San Francisco-Oakland Bay Bridge and a temporary bypass structure tying into Yerba Buena Island. It will remain in place for three years while construction of a new East Span is completed to connect with a new self-anchored suspension bridge (SAS) already well into construction.
The replacement section was constructed in advance to the south of the existing structure. Navigating it into position, utilizing the same skidding system, required precise engineering to roll it into the vacated space in order to match the deck elevations of the abutting structures.
Developer/Owner: California Department of Transportation, Oakland
General Contractor: C.C. Myers Inc., Rancho Cordova
Construction Management: California Department of Transportation, Oakland
Structural Engineer: T.Y. Lin International/Moffatt & Nichol (TYLI/M&N Joint Venture), San Francisco
Subcontractors: Bay Cities Paving & Grading, Concord; Conco Cement, Concord; Condon-Johnson & Associates, Oakland; Danny’s Construction, Shakopee, Minn.; Harris Salinas Rebar, Livermore; Schuff Steel, Oakland; Silverado Contractors, Oakland