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.
Postcard of the downstream face and powerhouses, Hoover Dam. Caption on back: "Hoover (Boulder) Dam showing Fortification Mountain." "P10567. Color by David Mills."
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.