Black and white image of excavation activities at the bed of Hoover Dam. High scalers can be seen displaying their clinging skills on the walls of the Black Canyon. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of the downstream face of Hoover Dam and its power plant at night, as seen from the lower portal road at the dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of visitors posing in the gallery leading from the elevator to the Hoover Dam powerhouse. Boulder Dam was officially renamed Hoover Dam in 1947.
An image of visitors standing in the gallery leading from the elevator to the Hoover Dam powerhouse. Boulder Dam was officially renamed Hoover Dam in 1947.
An image of Rotary Club members having lunch at Boulder Dam while an unidentified man stands up to give a speech. Note: Boulder Dam was officially renamed Hoover Dam in 1947.