Archival objects in this container: Hangar built by the U.S. Navy at the Boulder City Airport, Boulder City, Nevada, approximately 1931-1935 Pipes from the Babcock and Wilcox Company used for penstocks at the Hoover Dam construction site, 1934 April 27 Worker standing inside a 13 foot diameter penstock pipe, approximately 1930-1935 Worker standing inside of a large Babcock and Wilcox Company pipe that was used for Hoover Dam construction, approximately 1930-1935 Large pipe section being lifted at the Hoover Dam construction site, approximately 1930-1935 Pipe sections inside Babcock and Wilcox warehouse, 1934 April 30 Pipes at the Babcock and Wilcox warehouse, to be used for Hoover Dam construction, approximately 1930-1935 Pipes at the Babcock and Wilcox warehouse, to be used for Hoover Dam construction, approximately 1930-1935 Locomotive inside a 30 foot diameter pipe, Babcock and Wilcox warehouse, 1934 March 14 Pipes at the Babcock and Wilcox warehouse, to be used for Hoover Dam construction, approximately 1930-1935 Hydraulic turbine loaded on railroad siding at Hoover Dam, approximately 1930-1935 Worker standing outside of the final wall of penstock at the Hoover Dam construction site, approximately 1930-1935 Stages of construction of the Hoover Dam, approximately 1936 Dirt being dumped into the Colorado River to create a cofferdam at the Hoover Dam construction site, approximately 1930-1935 Dirt being dumped into the Colorado River to create a cofferdam at the Hoover Dam construction site, approximately 1930-1935 Water channel prior to diversion for Hoover Dam construction, approximately 1930-1935 Trucks loading dirt for water diversion for Hoover Dam construction, 1933 April 20 Rex Motor Mixer being lowered into Black Canyon during Hoover Dam construction, approximately 1930-1935 Boxcar of workers being lowered into Black Canyon for Hoover Dam construction, approximately 1930-1935 Box of equipment being lowered into Black Canyon for Hoover Dam construction, approximately 1930-1935