. . . . . . . . . "Coolidge Dam" . . "Hoover Dam#Planning and agreements" . . . . "1936" . . . . . "Six Companies" . . "Winged Figures of the Republic" . . . "Arch-gravity" . . . . . . "Hoover Dam#Naming controversy" . . . . "dam in Boulder Canyon, Arizona" . . "2485249.0" . . . . . . . . "Hoover Dam#US Construction Railroad" . . . "1931" . . "Concrete gravity-arch dam" . . . . "Hoover Dam" . . . . . "Boulder" . "Hoover Dam#Power plant and water demands" . . . "Block 16" . "1931" . . . . . . . . . . . . . . . . . . . . "Hoover_Dam#Environmental_impact" . . . "Hoover (2)" . . . . . . . . . "Arch" . "221.40672" . "Boulder Canyon Project Act" . . . . "Boulder Dam, Arizona" . "Hoover [Boulder] Dam" . . . "Hoover" . . . . . . . . . "379.1712" . "Boulder (Hoover) Dam" . . . . . . . . . "Boulder Dam" . . . . . "Power, flood control, water storage, regulation, recreation" . "Hoover Dam Miscellaneous Sales Act" . . . . "375.5136" . . . . . . . "Hoover Dam" . "Operational" .