Hoover Dam (above) at 726 feet is the highest dam in this hemisphere, shown on May 27, 1960, will be 25 years old tomorrow. The huge concrete wall blocks Black Canyon and the Colorado River.

The water elevation in Lake Mead is around 1,040 feet above sea level. At 950 feet, Hoover Dam will be at its lowest point to be able produce power, according to the US Bureau of Reclamation.

Hoover Dam is one of the tallest concrete dams in ... Most motorists traveling between Arizona and Nevada use a bypass bridge high above the dam that opened in 2010. The Bureau of Reclamation ...

The Hoover Dam is one of the most famous pieces of civil ... The dam measures 726.4 ft in height above bedrock, the size of a 60-storey building. The base of the dam is 660ft thick, the size ...