The Hoover Dam at Nevada/Arizona border There are places in America that leave a lasting impression long after you have returned home. The Hoover Dam is one of them. Standing 726 feet (221 meters) above the Colorado River, Hoover Dam is widely recognized as one of the greatest engineering achievements of the 20th century. Yet numbers alone cannot explain what visitors feel when they stand before this colossal structure. The Hoover Dam at Nevada/Arizona border As evening desce