Archival objects in this container: Guided tours at the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 Hoover Dam transmission lines: blueprint, approximately 1940 to 1960 Hoover Dam major transmission lines: blueprint, approximately 1940 to 1960 Panoramic perspective of the Hoover Dam area: blueprint, approximately 1940 to 1960 Hoover Dam, Arizona at night: photographic print, approximately 1940 to 1960 Hoover Dam looking downstream toward the lower portal road: photographic print, approximately 1940 to 1960 View of the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 Arizona intake tower at the Hoover Dam: photographic print, approximately 1954 to 1956 View of the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 View of the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 View of the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 View of the Hoover Dam, Arizona: photographic print, approximately 1940 to 1960 Canyon wall outlet works in operation at the Hoover Dam: photographic print, approximately 1954 to 1956 View of the Hoover Dam, Arizona: photographic print, approximately 1950 to 1959 View of the Hoover Dam, Arizona: photographic print, approximately 1950 to 1959 Aerial view of the Hoover Dam, Arizona: photographic print, approximately 1950 to 1959 Supervisors Safety Training session at the Hoover Dam: photographic print, 1962 March 26 L. J. Hudlow, R. E. Donlin, L. H. Harman, and D. D. Dutter: photographic print, approximately 1940 to 1960 Members of the Hoover Dam Apprenticeship Committee: photographic print, 1951 April 16 Electrians that it took to work on the Hoover Powerplant: photographic print, approximately 1940 to 1960 Harvey W. Boyce's promotion from apprentice to electrician: photographic print, 1951 April 16