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File:Detail of the north-east leg of Tower 10 of the Crockett approach viaduct. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA HAER CAL,48-VALL,1-73.tif

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Detail of the north-east leg of Tower 10 of the Crockett approach viaduct. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA
Photographer

Hall, William

Related names:

Derleth, Charles
Burr, William
Steinman, David
Hanford, Aven
Klatt, Oscar
Title
Detail of the north-east leg of Tower 10 of the Crockett approach viaduct. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA
Depicted place California; Solano County; Vallejo
Date 2000
Dimensions 4 x 5 in.
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER CAL,48-VALL,1-73
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Notes
  • Significance: The Caquinez Bridge is a cantilever truss structure which carries three lanes of westbound Interstate-80 traffic across the Carquinez Strait. (Eastbound I-80 traffic is carried by a parallel structure, erected in 1958.) The 1927 bridge was the first major auto bridge in the San Francisco Bay Area, predating by a decade the Golden Gate and San Francisco-Oakland Bay Bridges. Replacing an auto ferry across the Carquinez Strait, the bridge was an important link in north-south traffic from the Bay Area to Northern California and the Pacific Northwest, as well as connecting the Bay Area to Sacramento and points east. The bridge's importance as a north-south link diminished somewhat with the opening of the Golden Gate Bridge in 1937, but it remains a critical highway link between the Bay Area and Sacramento, carrying an average of more than fifty thousand vehicles per day. With two main spans of 1100' each, the Carquinez Bridge at the time of its completion was the fourth largest cantilever truss bridge in the world, and the second largest in the United States. (The Queensboro Bridge in New York City, constructed in 1909, was the largest cantilever truss bridge in the U.S., with spans of 984' and 1182'.) Only five bridges of any type in the U.S. had spans exceeding 1100' in 1927 (the four being suspension spans). The Carquinez Bridge was the largest bridge west of the Mississippi River, and the first major bridge designed to resist seismic forces. One of the biggest challenges for the engineers was the construction of piers in the deep and swift waters of the Carquinez Strait. Two of the bridge's piers extend approximately 135' below mean high water to bedrock, through 80'-90' of water and 45'-55' of earth beneath the channel. These were the deepest water piers ever constructed at that time, a record later surpassed by the Golden Gate and San Francisco-Oakland Bay Bridges.
  • Survey number: HAER CA-297
  • Building/structure dates: 1923-1927 Initial Construction
  • Building/structure dates: 1958 Subsequent Work
  • Building/structure dates: 1974 Subsequent Work
Source https://www.loc.gov/pictures/item/ca3089.photos.383476p
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Object location38° 06′ 15.01″ N, 122° 15′ 20.02″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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current07:12, 6 July 2014Thumbnail for version as of 07:12, 6 July 20144,073 × 5,057 (19.65 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 05 July 2014 (501:600)

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