Looking upstream through Black Canyon showing foundation excavation and construction installations on cofferdam crests. View shows bedrock benching at sides of canyon and deeper channel in middle.; 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: 3748px × 5336px
Photo credit: © Alpha Stock / Alamy / Afripics
License: Licensed
Model Released: No

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