A colored postcard showing an artist's representation of the transportation of a pipe necessary for the construction of Boulder Dam, a title that was later changed to Hoover Dam. Transcribed onto the top border of the image: "Transporting Pipe, Boulder Dam."

Lowering 180-ton section of Penstock Pipe, Boulder Dam, 1931-1936

Hoover (Boulder) Dam, taken from the upstream side of the dam on the Arizona side, May, 1947. The intake towers, Nevada spillway house (in the background, behind the intake towers), and the Nevada spillway are visible. During the years of lobbying leading up to the passage of legislation authorizing the dam in 1928, Hoover Dam was originally referred to "Boulder Dam" or as "Boulder Canyon Dam", even though the proposed site had shifted to Black Canyon. The Boulder Canyon Project Act of 1928 (BCPA) never mentions a proposed name or title for the dam. When Secretary Wilbur spoke at the ceremony starting the building of the railway between Las Vegas and the dam site on September 17, 1930, he named the dam "Hoover Dam", citing a tradition of naming dams after Presidents, though none had been so honored during their terms of office. After Hoover's election defeat in 1932 and the accession of the Roosevelt administration, Secretary Ickes ordered on May 13, 1933 that the dam be referred to as "Boulder Dam". In the following years, the

Hoover (Boulder) Dam, taken from the upstream side of the dam on the Nevada side. May, 1947. The intake towers, Nevada spillway house (in the background, behind the intake towers), and the Nevada spillway are visible. During the years of lobbying leading up to the passage of legislation authorizing the dam in 1928, Hoover Dam was originally referred to "Boulder Dam" or as "Boulder Canyon Dam", even though the proposed site had shifted to Black Canyon. The Boulder Canyon Project Act of 1928 (BCPA) never mentions a proposed name or title for the dam. When Secretary Wilbur spoke at the ceremony starting the building of the railway between Las Vegas and the dam site on September 17, 1930, he named the dam "Hoover Dam", citing a tradition of naming dams after Presidents, though none had been so honored during their terms of office. After Hoover's election defeat in 1932 and the accession of the Roosevelt administration, Secretary Ickes ordered on May 13, 1933 that the dam be referred to as "Boulder Dam". In the following years, the n

The upstream face of Hoover Dam.

Downstream face of Boulder Dam at night

A view of the finished Hoover Dam and Lake Mead nearly full. Site Name: Hoover Dam (dam)