Looking upstream through Black Canyon. View shows upstream and downstream cofferdams with dam foundation excavation in progress. Rock backwash barrier, outlet portal of diversion tunnel No. 2, and construction bridge seen in foreground.; Scope and content: Photograph from Volume Two of a series of photo albums documenting the construction of Hoover Dam, Boulder City, Nevada.

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Size: 3712px × 5387px
Photo credit: © Alpha Stock / Alamy / Afripics
License: Licensed
Model Released: No

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