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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. Constructed between 1931 and 1936, during the Great Depression , it was dedicated on September 30, 1935, by President Franklin D. Roosevelt .
The river system is one of the most heavily developed in the world, with fifteen dams on the main stem of the Colorado [citation needed] and hundreds more on tributaries. Collectively, dams in the Colorado River basin can hold four to five times the river's annual flow, generating hydroelectricity and supplying irrigation and municipal water ...
[26] [229] The construction of Hoover Dam stabilized the lower channel of the Colorado River, stored water for irrigation in times of drought, captured sediment and controlled floods. Hoover was the tallest dam in the world at the time of construction and also had the world's largest hydroelectric power plant.
It was announced that because of Hoover's passion towards the project, the dam would be named after him. As construction began in 1931, so did the Great Depression. Workers flocked to Boulder City ...
It passes under the Mike O'Callaghan–Pat Tillman Memorial Bridge (Hoover Dam Bypass), the highest concrete arch bridge in the world, carrying U.S. Route 93 at a height of 900 feet (270 m) above the Colorado River.
Lake Mead from space in November 1985: North is facing downward to the right. The Colorado River can be seen leading southward away from the lake on the top left. The Hoover Dam is located where the river meets the lake. Sediment-laden water from the Colorado River flowing into Lake Mead in March 2013. Nine main access points to the lake are ...
In 1928, President Calvin Coolidge signed a bill ordering the construction of what would become the Hoover Dam. It was completed in 1936, causing the Colorado River to start rising.
On the Arizona side of the river, there are several large hot springs that can be found by taking a trail north from a larger bay about 4 to 5 miles (6.4 to 8.0 km) south of the Hoover Dam. [3] The Colorado River traveling through the Black Canyon is designated as the Black Canyon Water Trail, a National Water Trail.