Summit Natural Gas of Missouri Inc. has worked hard to maintain our rates while bringing natural gasâa cleaner, lower cost energy sourceâto you and your region. In order to continue to provide you with the [...]
Hoover Dam. Hoover Dam, formerly called Boulder 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 dam in the United States. It impounds Lake Mead, which extends for 115 miles (185 km) upstream and is one of the largest manmade lakes in the world.
Hoover Dam is 1,244 feet long at the top. It is 726 feet high from the lowest point of the foundation to the crest. The dam is 660 feet thick at the base and tapers to 45 feet thick at the top. Its reservoir was the largest artificial lake in the world for decades and is still the largest in the United States.