Bureau of Reclamation Photographs of the Hoover Dam and Boulder City, Nevada
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Collection Number: PH-00071 Collection Name: Bureau of Reclamation Photographs of the Hoover Dam and Boulder City, Nevada Box/Folder: Folder 08 (Restrictions apply)
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.