This photograph has three images. The first one, (0272_0046) has a handwritten inscription that reads , "Arizona spillway empties into 50' diversion tunnel, which will be blocked off above intersection of spillway. The rest of the tunnel is of no use anymore. It was used to divert water around dam while being built. Stoney gate will release as well as the spillway." "This section of the tunnel was very unstable. Sections of the tunnel would fall without giving any warning at all. Kept the men spooked. I knew a young fellow, who told me he had to get drunk before he could get up enough nerve to go to work. Couldn't get a transfer. This kind of work I call 'hero's of Boulder Dam." The second one (0272_0047) reads "Like donkeys in a mine never see daylight." It was a trucking mammoth concrete buckets in the 50 ft. diameter tunnels at Hoover Dam, an Oakes photo. The third one, (0272_0048) reads, "visit of L.A. Examiner scout car - crossing canyon on Gov. Hi-line."

A view of an unidentified man working on the canyon floor at the Hoover Dam construction site.