The rarely seen back of the Hoover Dam before it filled with water; ca. 1936.
And here’s the view from the other side:
There were 112 deaths associated with the construction of the dam. Included in that total was J. G. Tierney, a surveyor who drowned on December 20, 1922, while looking for an ideal spot for the dam. He is generally counted as the first man to die in the construction of Hoover Dam. His son, Patrick W. Tierney, was the last man to die working on the dam’s construction, 13 years to the day later.
*Here’s an actual aerial photo from 1950: