One of the main sightseeing attractions in Las Vegas is the magnificent Hoover Dam. Hoover Dam is among the greatest modern engineering projects. The construction of the Dam occurred from 1931 until its completion in 1935. Blocking the Colorado River created two lakes, the first being Lake Mead in 1935 and the second being Lake Mohave with the completion of Davis Dam in 1950.

At the peak of construction at Hoover Dam 5,218 people would be working on the Dam at one time. Hoover Dam is 726.4 feet in height, it is 660 feet thick at the base and contains 4,360,000 cubic yards of concrete. The power plant at Hoover Dam has the capacity to produce 1,344,800 electricity kilowatts. Hoover Dam has produced approximately 150 billion kilowatts (enough energy to supply a million residents for 20 years).