Casino Arizona has broken ground on a 15-storey hotel and casino in Scottsdale, Maricopa County.

The project includes a 497-room hotel, a 100,000sq.ft conference centre, a spa and restaurants.

The 240,000sq.ft casino will be more than twice the size of the Salt River Pima-Maricopa Indian Community’s other casino, six miles south of the new site.

"We’re looking for a four-star-plus type of operation," said Russ Burbank, senior vice president of operations for Casino Arizona. "It will certainly be positioned in the market with the peer groups out there."

The resort is due to open in 2010.