(AP Photo)
This view from April 18, 1932, shows the interior of one of the tunnels through which the Colorado River will be diverted around the Hoover Dam site. The project was in the early stages of construction.
(AP Photo)
This view from April 18, 1932, shows the interior of one of the tunnels through which the Colorado River will be diverted around the Hoover Dam site. The project was in the early stages of construction.