The 342,000-square-foot addition will expand the amenities at the existing $800 million casino and entertainment facility that opened in November 2013, with a full array of gaming, dining and entertainment. The expansion includes a 200-guest room resort that also features a spa, meeting and convention space, and pool area. SeptemThe leadership of the Federated Indians of the Graton Rancheria broke ground today on a $175 million expansion of the Graton Resort & Casino, the Bay Area's largest gaming and entertainment destination.