UNCASVILLE, Conn. -- Mohegan Sun, already one of the world's largest casinos, has unveiled plans for an estimated $740 million expansion that will include the return of poker and a new House of Blues music hall.

Tribal gaming officials hope the expansion will help them better serve existing customers and draw in new ones, including people in their early 20s and Asians.

Mohegan Sun, which has been celebrating its 10th anniversary, has about 10,000 employees and expects to add about another 2,000 in the next five years. The tribe's casino attracts 35,000 visitors daily and generates about $1.5 billion annually in revenue.

The expansion, known as "Project Horizon," will include a 38-story, 1,000-room hotel slated to open in 2010. Inside will be a smaller, House of Blues-themed hotel. The House of Blues music hall, which will hold about 1,500 people, is scheduled to open in 2009. There will also be an adjoining restaurant and store.

The casino already has a 1,200-room hotel, but it is 93 percent full on an average night, meaning the casino has had trouble accommodating larger conventions because it can't guarantee hotel space, said Hartmann.

The new hotel tower, which will also include a new spa, is set to open in 2010. Other elements of the project are expected to open sooner, spring of 2008, including more restaurants and shops, and a new Casino of the Wind, which will add 964 slot machines to the 6,000 the casino already has.

A new Casino of the Earth opening in the summer of 2007 will aim to draw Asian customers with table games and a Hong Kong street food outlet.

Casino officials are also hoping to bring in more young people by opening a 45-table poker room. The poker room at Mohegan Sun closed in 2003 to make room for more slot machines, but televised tournaments and online gaming have made poker so popular that the casino is bringing it back.

The Connecticut casinos caught a reprieve recently when voters in nearby Rhode Island rejected a measure that would have allowed gambling giant Harrah's Entertainment Inc. to build a resort casino with the Narragansett Tribe near Providence. But officials are still talking about opening casinos in the Catskills in New York.

Nearly half of Mohegan Sun's customers come from Connecticut, with most of the rest coming from Rhode Island, Massachusetts and New York.

Both Mohegan Sun and Foxwoods send 25 percent of their slot revenue to the state in return for exclusive rights to operate slot machines.

Foxwoods has broken ground on a $700 million expansion that will include an 825-room hotel, convention space and more restaurants and nightclubs. The expansion will add more than 2 million square feet to the resort and is scheduled to open in the summer of 2008.