Hoover Dam guide "Blackie" Hardy posing on top of the Hoover Dam. In this photograph, Hardy is quoted with saying that he'd be proud to have this specific photo in every paper in the country. Individual Creator's credit goes to Jim Blackton Moore.
Black and white image of the Hoover Dam tunnel construction site. There are four visible bridges over the Colorado River. Note: Boulder Dam was officially renamed Hoover Dam in 1947.