"LAS VEGAS: BIRTH OF A CITY In 1905 the San Pedro, Los Angeles and Salt Lake railroad arrived in Las Vegas, connecting the city with the Pacific and the country’s main rail networks. The future downtown was platted and auctioned by railroad company backers, and Las Vegas was incorporated in 1911. Nevada outlawed gambling in 1910 but the practice continued in speakeasies and illicit casinos. By the time gambling was legalized again in 1931, organized crime already had roots in the city. In 1931 construction began on the massive Boulder Dam (later renamed the Hoover Dam), drawing thousands of workers to a site just east of the city. Casinos and showgirl venues opened up on Fremont Street, the town’s sole paved road, to attract the project’s workers. When the dam was completed in 1936, cheap hydroelectricity powered the flashing signs of Fremont’s “Glitter Gulch.â€" Retrieved November 2017 @ History.com