Originally founded in 1931 as a community for workers building Hoover Dam, Boulder City was the first planned community in southern Nevada. Designed by Saco Rienk DeBoer, it was a federal reservation where only workers associated with the building or operations of the dam could live. Gaming and alcohol were both banned at first, and Boulder City remains the only incorporated city in Nevada where gaming is not allowed. The community grew quickly: the post office opened and the rail line to the dam site was completed in 1931, and the first airport opened in 1933. After the Boulder Canyon Project was completed, the town became home to dam workers and their families. In 1959, the community was incorporated, with a celebration held on January 4, 1960, and the land and buildings owned by the federal government were turned over to the new city. Since then, the community has grown and become the gateway to Hoover Dam.