Looking upstream at the dam site, Hoover Dam, January 1933. Construction materials and small bridges line the canyon above the river as the dam is being built.
First 40 foot slab of concrete poured in lining diversion tunnels for the construction of the Boulder Dam, now called Hoover Dam. Site Name: Hoover Dam (dam)
Construction site of the Boulder Dam, now known as Hoover Dam. Marion electric drag line with 5 cubic yard capacity bucket loading gravel. Site Name: Hoover Dam (dam)
A colored postcard showing an artist's representation of an 150 man transport for the Boulder Dam, later renamed Hoover Dam, project in Black Canyon. Transcribed onto the top border of the image: "150 Man Transport, Boulder Dam Project."
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)