Black and white image of Hoover Dam construction. A cat-walk is visible, spanning the canyon over the upstream cofferdam. The span is approximately between triangulation points C-7 and C-8. Elevation at the middle of the span is approximately 1,005 feet. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Walker R. Young (right) and an unidentified individual standing beside a Department of the Interior/Bureau of Reclamation vehicle. Young was chief construction engineer on the Hoover Dam Project (Boulder Canyon Project) for the Bureau of Reclamation. Note: Boulder Dam was officially renamed Hoover Dam in 1947.