Archival objects in this container: Hoover Dam mascot dog, Boulder City, Nevada, approximately 1931 to 1936 Sedimentation tank at Hoover Dam for Boulder City, Nevada water supply, approximately 1932 Lewis Construction Company workers drilling railroad tunnels to Hoover Dam, 1931 LeTourneau Construction Company building Black Canyon Highway to Hoover Dam, 1931 Sedimentation tank for Six Companies gravel plant near Boulder City, Nevada, 1931 Digging diversion tunnels at Hoover Dam, approximately 1931 Boulder Canyon, Nevada, 1931 Ingersoll-Rand generator used to produce electricity during the early stages of Hoover Dam Construction, 1931 LeTourneau Construction Company building Black Canyon Highway to Hoover Dam, 1931 Water pipe being laid near Boulder City, Nevada, 1931 Six Companies' warehouse under construction, Boulder City, Nevada, 1931 Construction workers at Hoover Dam, 1931 Construction at Hoover Dam, 1931 Two construction workers at Hoover Dam, 1931 Construction site in Boulder Canyon, Nevada, 1931 Construction crews in Boulder Canyon, 1931 Railroad track being laid near Boulder Canyon, Nevada, 1931 Blasting the Hoover Dam construction site, Nevada, 1931 Highway near Hoover Dam, Nevada, approximately 1930 to 1939 Constructing diversion tunnels at Hoover Dam site, 1931 Construction scene at Hoover Dam, approximately 1931 Construction site at Hoover Dam, 1931 Colorado River near Boulder City, Nevada, 1931 Construction work at Hoover Dam, 1931 Inside one of the partially-constructed diversion tunnels at Hoover Dam, approximately 1931 Load More