Panoramic image of Hoover (Boulder) Dam construction, early evening view, November 1933. Lights line the canyon walls as workers proceed with construction. Bright white light in the sky may possibly be a full moon.
Two unidentified men with construction equipment inside the outlet works at Hoover Dam. Typed label on back of photograph: "Outlet works - Boulder Dam."
Black and white image of concrete being placed into the side walls of diversion tunnel #4 at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of concrete being placed into the side walls of diversion tunnel #4 at Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
An image of a burro standing on the rocks in Black Canyon overlooking a part of Hoover Dam and Lake Mead. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Caption at right of image reads: "The downstream face of Hoover Dam from the Nevada lookout point." Boulder Dam was officially re-named Hoover Dam in 1947.
An image of a billboard for advertising the Visitor's Bureau in Boulder City. The text on the sign reads: "After your tour of the dam, see the official movie! The Building of the Boulder Dam."
Earl Brothers, who established the Boulder Dam Tourist Service Bureau in 1933, is seen fishing from a seaplane on Lake Mead. Another unidentified man is with him.
An image of a row of power generators under construction at Hoover Dam. Several men are working on one of them. Boulder Dam was officially renamed Hoover Dam in 1947.
An image from the power generator floor of visitors standing on a viewpoint platform inside the Hoover Dam powerhouse. Boulder Dam was officially renamed Hoover Dam in 1947.