Skip to main content

San Francisco

Society: ASCEMain Category: CivilSub Category: BridgesEra: 1930-1939DateCreated: 19371-99 San Francisco – Bay BridgeOaklandState: CAZip: 94607Country: USAWebsite: http://www.asce.org/People-and-Projects/Projects/Landmarks/San-Francisco---Oakland-Bay-Bridge/Creator: Purcell, Charles , American Bridge Company
Ever since the Gold Rush days of the 1850s, San Francisco Bay area residents and businesses had lobbied for a bridge joining San Francisco and Oakland. Early studies indicated that the bridge was impractical and infeasible; but in October 1929, President Herbert Hoover (himself an engineer) and California Governor C. C. Young appointed the Hoover-Young San Francisco Bay Bridge Commission to study the question more closely.
YearAdded:
1986
Image Credit: Courtesy Flickr/David Baron (CC BY-SA 2.0)Image Caption: San Francisco - Oakland Bay BridgeEra_date_from: 1937
Alvord Lake Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1880-1889DateCreated: 1889San FranciscoState: CACountry: USAWebsite: http://www.asce.org/project/alvord-lake-bridge/Creator: Ransome, Ernest

Alvord Lake Bridge, along with many of Ernest Ransome's reinforced concrete buildings, survived the 1906 San Francisco earthquake and several subsequent tremblers with no damage. Built in 1889 by Ernest L Ransome of New York, this reinforced concrete arch bridge in San Francisco's Golden Gate Park is believed to be the oldest concrete bridge in the United States that used steel reinforcing bars to improve the behavior of the concrete. The reinforcement consists of a series of square cold-twisted steel reinforcing bars, an invention of Ransome.

YearAdded:
1969
Image Credit: Public Domain (National Park Service)Image Caption: Alvord Lake BridgeEra_date_from: 1889
Subscribe to San Francisco

We hope you enjoyed this essay.

Please support this 70-year tradition of trusted historical writing and the volunteers that sustain it with a donation to American Heritage.

Donate

Stay informed - subscribe to our newsletter.
The subscriber's email address.