San Francisco–Oakland Bay Bridge
San Francisco–Oakland Bay Bridge, double-decked structure, W Calif.; built 1933–36 and (eastern section replacement) 2002–13. It has a total length of 8.25 mi (13.2 km). From San Francisco it crosses the bay to Yerba Buena Island, where a tunnel connects with the section leading to Oakland and Berkeley. The western section consists of two suspension spans joined at a central anchorage; the eastern of a self-anchored single-tower suspension span and viaduct. In the severe earthquake that hit the Bay Area in 1989, the eastern section of the bridge, then consisting of a cantilever span, several truss spans, and a causeway, sustained significant damage; the damage was repaired, but a replacement bridge subsequently constructed between Yerba Buena and Oakland.
"San Francisco–Oakland Bay Bridge." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (May 24, 2019). https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/san-francisco-oakland-bay-bridge
"San Francisco–Oakland Bay Bridge." The Columbia Encyclopedia, 6th ed.. . Retrieved May 24, 2019 from Encyclopedia.com: https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/san-francisco-oakland-bay-bridge