Rigger-rodman working with topography survey party in Black Canyon on Nevada side. Rodman is lowered over canyon rim on rope and gives points which are recorded with both horizontal and vertical angle by two transit parties.; 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: 4162px × 6006px
Photo credit: © Tango Images / Alamy / Afripics
License: Licensed
Model Released: No

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