Black and white image of a celebration with fireworks at the Hoover Dam powerhouse. The Young Presidents' Organization arranged a party for nearly 1,000 people that was held on the powerhouse roof. The visitors, all wearing hard hats, were the first to use this setting. Tables and chairs are also visible.
Black and white image of a celebration with fireworks at the Hoover Dam powerhouse. The Young Presidents' Organization arranged a party for nearly 1,000 people that was held on the powerhouse roof. The visitors, all wearing hard hats, were the first to use this setting. Tables and chairs are also visible.
Black and white image of a celebration at the Hoover Dam powerhouse. The Young Presidents' Organization arranged a party for nearly 1,000 people that was held on the powerhouse roof. The visitors, all wearing hard hats, were the first to use this setting. Tables and chairs are also visible on the powerhouse roof.
Black and white image of a party at the Hoover Dam powerhouse. The Young Presidents' Organization arranged a party for nearly 1,000 people that was held on the powerhouse roof of Hoover Dam. The visitors, all wearing hard hats, were the first to use this setting. This group photo includes Ellis L. Armstrong, Dick Woodward, and Frank Lord.
Black and white image of Dick Woodward (left) and Ellis L. Armstrong at a party held by the Young Presidents' Organization on the roof of the powerhouse at Hoover Dam. Nearly 1,000 people attended, all wearing hard hats, and were the first to use this setting.
Black and white image of Secretary of the Interior, Dr. Ray Lyman Wilbur, on a tour of inspection at Hoover Dam. It was under Dr. Wilbur's supervision that the Boulder Canyon Project was commenced. In the background the concrete form used in lining the 50-foot diversion tunnels at the outlet portal of Diversion Tunnel No. 2 can be seen. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image showing the completed construction of Diversion Tunnel No. 4, one of four 50-foot diversion tunnels at Hoover Dam. Construction men can be seen at the base of the tunnel. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of President Franklin D. Roosevelt delivering the dedication address at Hoover Dam. The sign underneath him reads: "Franklin D. Roosevelt; President of the United States; Dedicating the Boulder Dam - Sept. 30, 1935." Handwritten text on the image reads: "Photographed by Walter J. Lubken, Six Com. Inc." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of John Chatfield Page, Senator Harold L. Ickes, Mrs. Ickes, and I. C. Harris, in the Nevada wing of the Hoover Dam power plant. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Black and white image of a mud deposit at Hoover Dam. This site can be seen at mile 257, and a member of the survey crew displays a representative sample of one of the mud cubes formed to show the depth of the crevices. Note: Boulder Dam was officially renamed Hoover Dam in 1947.