Description from Daily Overview

36°0′56″N 114°44′16″W

Hoover Dam is a 726-foot high, _____-foot wide concrete arch-gravity dam located on the Colorado River at the border of Arizona and Nevada. Constructed between 1931 and 1936 during the Great Depression, a workforce of approximately 20,000 poured a total of 4.36 million cubic yards of concrete to complete the structure. That is enough concrete to pave a two-lane highway from San Francisco to New York City.

Daily Overview / Satellite imagery courtesy of Digital Globe / Benjamin Grant