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AL ZAMPA (CARQUINEZ) BRIDGE
Location:Crockett, California, USA Description:The Carquinez Strait, located about twenty miles northeast of San Francisco, carries the Sacramento River into the San Francisco Bay. Two steel truss bridges, built in 1927 and 1958, spanned the strait and provided a vital link on the Interstate Highway 80 corridor. Heavy traffic on I-80, along with the expense of seismically upgrading the 1927 structure, led to construction of a new bridge. The new suspension bridge has a single main span of 728 m (2388 ft.) length, and two side spans having lengths of 147 m (482 ft.) and 181 m (594 ft.). The 25.6 m wide steel orthotropic girder is supported by vertical suspenders and two 512 mm (20 inches) diameter main cables. The cables are supported by two 125 m (410 ft.) tall towers, and anchored at a tunnel anchorage at the north end and a gravity anchorage at the south end. Total length: 1056 m (3465 ft.)
Owner:State of California Client:State of California FCI Constructors Inc./Cleveland Bridge California Inc. Lim & Nascimento Scope of Work:Buckland & Taylor Ltd. supplied construction engineering services on Pier P1 (cable bent at the south end of the bridge) and Towers T2 and T3 (main 125 m/410 ft. towers) for the Joint Venture FCI Constructors Inc./Cleveland Bridge California Inc. We also assisted Lim & Nascimento with the inspection of deck segment fabrication. In 1997, Peter Buckland was a member of the Owner's Peer Review Panel for the bridge which is the first new suspension bridge to be built in the US in 25 years.
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