Ameristar Casinos unveiled details yesterday of a plan to develop a $910 million casino resort near downtown Springfield, Mass., on a 40-acre site. The property would offer a 150,000-square-foot casino featuring 3,300 slot machines and 110 table games, including a poker room; a 500-room luxury hotel with 50 suites; indoor and outdoor swimming pools; a spa; a fitness center, and retail space. A conference and entertainment center is part of the plan. The resort is master-planned to accommodate significant future expansions of the casino, hotel and parking garages. Top chefs including Wolfgang Puck and Martin Yan have signed on to the project to lend their names to several restaurants, while former Red Sox All-Star second baseman Jerry Remy will feature his Jerry Remy's Sports Bar & Grill. The proposal is one of three set forth for the city, with two others coming from MGM and Penn National Gaming. Construction on all three depends on the Massachusetts Gaming Commission, which plans to award three casino licenses sometime in 2014. "Ameristar owns all 40 acres, which have been cleared and are immediately ready for construction," said CEO Gordon Kanofsky. "With no displacement of existing residents or businesses, we will have a 12- to 18-month head start on other proposals."