Carquinez Bridge (USA)
The Carquinez Bridge is actually a pair of bridges spanning the Carquinez Strait at the northeastern end of San Francisco Bay. They form the part of Interstate 80 between Crockett and Vallejo, California.
The original Carquinez Bridge was a steel cantilever bridge built in 1927. A second parallel cantilever bridge was completed in 1958 to deal with the increased traffic.
Following the Loma Prieta earthquake, the 1927 span was deemed unsafe in the event of an earthquake, leading to the construction of a suspension bridge opened in 2003, and named the Alfred Zampa Memorial Bridge. It carries southbound traffic from Vallejo to Crockett, and the 1958 cantilever span carries northbound traffic.
The above information is condensed from the Wikipedia entry, accessed 29/2/2024.
The construction of the 1927 was described in some detail in Engineering in 1928. 'Under the supervision of Mr. Derleth, the design and contract drawings for this bridge were made by Mr. D. B. Steinman of Messrs. Robinson and Steinman, consulting engineers, New York. In order to adapt the steelwork to shop practices and erection requirements, modifications in the design were made and erection schemes and programmes drawn up by the American Bridge Co. in New York, in the office of the late Mr. C. W. Bryan, chief engineer, under the supervision of Mr. C. G. E. Larsson, chief consulting engineer, and in charge of Mr. O. F. Goodrich, designing engineer, subject to the approval of Mr. William H. Burr, consulting engineer, in addition to Messrs. Derleth and Steinman. The steelwork for the Carquinez Strait Bridge, amounting in all to 13,000 tons, was erected by the United States Steel Products Company, Pacific Coast representatives of the American Bridge Company, under the supervision of Mr. Richard Khuen, Jr.[1]