Black and white image of workers placing concrete in column H-5 between elevation 630 and elevation 635 during the test pour made before the Hoover Dam Board of Consulting Engineers. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of Hoover Dam at night. Seventy-eight floodlights on top of the central section of the power plant project 93,500 watts on the face of the dam.
View at Colorado River area near Hoover Dam site. Photographer W.A. Davis disagrees with the identification. He says, "Hills west (10 miles) of Las Vegas, Charleston range in background. Petroglyphs on the rocks, Rocks are red and yellow."
An artist's color rendering of Hoover (Boulder) Dam construction midway through progress. Printed text on front of postcard: "Looking upstream, Colorado River, Boulder Dam."