Hoover DamHoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt.Hoover Dam impounds Lake Mead, the largest reservoir in the United States. More information about Hoover Dam can be found here
"Summer vacation !"
This was submitted by Kathleen W. from Arizona.