Boulder Dam (now called Hoover Dam) construction. Trucks hauling 2-cubic-yard buckets, bringing concrete from the mixing plant for invert lining. Site Name: Hoover Dam (dam)
Workmen at the construction of Boulder Dam, now called Hoover Dam. Trimming jumbo used in scaling walls of diversion tunnels and removing projecting rock. Site Name: Hoover Dam (dam)
Construction site for Boulder Dam, now called Hoover Dam. With the approach of the annual spring rise in the river, the temporary truck bridge shown on the right has been abandoned. Site Name: Hoover Dam (dam)
Men working at the construction site of Boulder Dam. Transcribed on photograph: "First concrete in Boulder Dam June 6, 1933 2236." Site Name: Hoover Dam (dam)