Eastern span replacement of the San Francisco–Oakland Bay Bridge
Seismic stabilization megaproject in California (2002–2013) / From Wikipedia, the free encyclopedia
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The eastern span replacement of the San Francisco–Oakland Bay Bridge was a construction project to replace a seismically unsound portion of the Bay Bridge with a new self-anchored suspension bridge (SAS) and a pair of viaducts. The bridge is in the U.S. state of California and crosses the San Francisco Bay between Yerba Buena Island and Oakland. The span replacement took place between 2002 and 2013, and is the most expensive public works project in California history,[5] with a final price tag of $6.5 billion, a 2,500% increase from the original estimate of $250 million, which was an initial estimate for a seismic retrofit of the span, not the full span replacement ultimately completed.[6][3] Originally scheduled to open in 2007, several problems delayed the opening until September 2, 2013.[7][8] With a width of 258.33 ft (78.74 m),[9] comprising 10 general-purpose lanes,[1] it is the world's widest bridge according to Guinness World Records.[10]
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San Francisco–Oakland Bay Bridge (eastern span replacement) | |
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Coordinates | 37.8168°N 122.3519°W / 37.8168; -122.3519 |
Carries | 10 lanes of I-80, pedestrians and bicycles |
Crosses | San Francisco Bay east of Yerba Buena Island |
Locale | San Francisco Bay Area, San Francisco and Alameda counties, California, U.S. |
Official name | None |
Maintained by | California Department of Transportation (Caltrans) |
Characteristics | |
Design | Concrete-steel precast segment viaducts, dual steel orthotropic box beam self-anchored suspension main span, cast-in-place reinforced concrete transition connector |
Total length | 2.2 mi (3.5 km) |
Width | 258.33 ft (78.74 m) |
Height | 525 ft (160 m) (SAS) |
Longest span | 1,263 ft (385 m) (SAS) |
Load limit | 500,000 |
Clearance above | Vehicles: N/A (Restricted to standard trucks by tunnel and other structures) |
Clearance below | 191 ft (58 m)[1] |
No. of lanes | 10 |
History | |
Construction start | January 29, 2002 |
Construction end | September 2, 2013 (10 years ago) (2013-09-02)[2] |
Construction cost | $6.5 Billion[3] ($8.38 billion in 2023 dollars[4]) |
Opened | September 2, 2013 10:15pm |
Statistics | |
Daily traffic | 270,000[1] |
Toll | Westbound only: $7.00 (rush hours) $3.00 (carpool rush hours) $5.00 (weekday non-rush hours) $6.00 (weekend all day) |
Location | |
The Bay Bridge has two major sections: the western suspension spans and their approach structures between San Francisco and Yerba Buena Island (YBI) and the structures between YBI and the eastern terminus in Oakland. The original eastern section was composed of a double balanced cantilever span, five through-truss spans, and a truss causeway. This part became the subject of concern after a section collapsed during the Loma Prieta earthquake on October 17, 1989. The replacement span is engineered to withstand the largest earthquake expected over a 1500-year period, and it is expected to last at least 150 years with proper maintenance.[11]