A colored postcard showing an artist's representation of Boulder Dam, later known as Hoover Dam, in Black Canyon, with Fortification Mountain lying in background. From this angle, intake towers can be seen sticking out of Lake Mead, along with the U-shaped power house at the base of the dam.
Caption at bottom of image reads: "Trucking mamoth (sic) concrete buckets in the 50 ft. dia. tunnels, Boulder Dam." Boulder Dam was officially re-named Hoover Dam in 1947.