On July 7, 1930, construction of the Hoover Dam began. Over the
next five years, a total of 21,000 men would work ceaselessly to
produce what would be the largest dam of its time, as well as one
of the largest manmade structures in the world.

Although the dam took only five years to build, its construction
was nearly 30 years in the making. Arthur Powell Davis, an
engineer from the Bureau of Reclamation, originally had his
vision for the Hoover Dam back in 1902, and his engineering
report on the topic became the guiding document when plans
were finally made to begin the dam in 1922.

Herbert Clark Hoover (August 10, 1874 – October 20, 1964)