This gallery shows images of Hoover Dam, the Hoover Dam by pass bridge and Lake Mead taken on a trip in 2011 (a year after the completion of the bypass bridge.)
Hoover Dam, also called Boulder Dam, was constructed from 1931 to 1936. It was started in the Hoover administration and completed in the Roosevelt administration. Naming a public work's project after the president who funded it is a bit controversial.
Lake Mead is the largest reservoir in the US. It covers 247 sq miles and holds back some 26 million acre feet of water. It was named after Elwood Mead who was the director of the Bureau of Reclamation at the time of the dam's construction.