A view of the interior of Boulder Dam, as seen from a visitor viewpoint platform; a man leans against the railing, looking down at power generators below. Boulder Dam was officially renamed Hoover Dam in 1947.
From the Morgan Sweeney Photograph Collection (PH-00228). Interior Arizona Wing of powerhouse, elevation 673. Construction activities during installation of generating units A-3, A-4 and A-9 on May 29, 1951.