Hoover 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 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.

Dam volume: 3,250,000 cu yd (2,480,000 m3) Maximum water depth: 590 ft (180 m)

Construction cost: $49 million (1931 budget); ... Spillway capacity: 400,000 cu ft/s (11,000 m