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, …

Bureau of Reclamation, Lower Colorado Region. Official Bureau of Reclamation Web Site for Hoover Dam. Information provided about the construction of the dam, how it works, and how to take a tour of the dam.

Where is Hoover Dam? In Black Canyon on the Colorado River, about 30 miles southeast of Las Vegas, Nevada. How high is Hoover Dam? It is 726.4 feet from foundation rock to the roadway on the crest of the dam. The towers and ornaments on the parapet rise 40 feet above the crest. How much does Hoover Dam weigh? More than 6,600,000 tons.

2025年3月6日 · Hoover Dam, dam in Black Canyon on the Colorado River, at the Arizona - Nevada border, U.S. Constructed between 1930 and 1936, it is the highest concrete arch- gravity dam in the United States. It impounds Lake Mead, which extends for 115 miles (185 km) upstream and is one of the largest artificial lakes in the world.

2010年4月14日 · The Hoover Dam was devised as a means for controlling the wild waters of the Colorado River and became the world's largest dam upon its completion in 1935.

Physically, Hoover Dam is a massive, concrete arch-gravity dam, 660 feet thick at its base and wide enough at its crest that traffic on old U.S. 93 coursed right over its top. Some 726 feet in the canyon below, or the equivalent of a 60-story building, the Colorado River lies tamed behind this great concrete wedge, its base as wide as two ...

2025年3月5日 · The vision behind Hoover Dam. The idea for Hoover Dam was born out of necessity. The Colorado River, known for its unpredictable flooding, threatened communities and farmlands across the Southwest. At the same time, rapid urbanization and agricultural expansion increased the demand for a steady water supply.

2 天之前 · The 726-foot-high Hoover Dam was completed in 1936. At the time, it was the largest dam in the world. In the thousand miles downstream from its headwaters, the river and its tributaries excavated 17 major chasms, the last of which, the Grand Canyon, now stands as the most magnificent of them all: a roofless tabernacle featuring mile-high walls and a dozen layers of rock extending more than 1.7 ...

Today the Hoover Dam controls the flooding of the Colorado River, irrigates more than 1.5 million acres of land, and provides water to more than 16 million people. Lake Mead supports recreational activities and provides habitats to fish and wildlife.

2021年8月11日 · Hoover Dam, a concrete dam along the Colorado River’s Black Canyon, was the world’s tallest dam when it was completed in 1935. Currently, it is the 29th tallest dam in the world and the 4th tallest concrete arch-gravity dam.