In the early 1930s Boulder City was built by the federal government to house 5,000 construction workers on the Hoover Dam project. A strict moral code was enforced to ensure timely completion of the dam, and to this day, the model city is the only community in Nevada in which gambling is illegal. (Note that the two casinos at either end of Boulder City are just outside the city limits.) After the dam was completed, the town shrank but was kept alive by the management and maintenance crews of the dam and Lake Mead. Today it's a vibrant little Southwestern town.