Archival objects in this container: Lower canyon diversion tunnels and the base of the Hoover Dam, 1933 March 28 Construction of the base of the Hoover Dam, approximately 1930-1935 Hoover Dam at night, approximately 1931-1934 Roads and walls being constructed during Hoover Dam construction, approximately 1930-1935 Hoover Dam during construction, 1934 March 17
