The height of the Hoover Dam is 726.4 feet (or 221.4 meters) from the base foundation rock to the roadway on the top of the dam.
The arch-gravity concrete dam is located in Black Canyon, about 30 miles southeast of Las Vegas, spanning the Colorado River near the border of the states of Nevada and Arizona.
Constructed between 1931 and 1936, the Hoover Dam is the second-highest dam in the United States, after the Oroville Dam in California.
