The $1 billion expansion project will also include: The casino floor expansion will add approximately 144,000 square feet, adding 2,000 new slot machines, a new poker room, and a new high-limit area. Graton Resort & Casino is already one of Sonoma County’s largest private employers. The expansion of the property will employ 2,000 temporary construction jobs and 600 new Graton Resort & Casino team members. Projects, including an additional hotel wing and expanded casino floor, are slated for future development. A new parking structure with solar panels will begin construction tomorrow. Graton Resort & Casino, the Bay Area’s premier gaming destination, hosted a groundbreaking ceremony today to celebrate the expansion of the Rohnert Park resort. From left to right: Lorelle Ross (Tribal Vice Chair), Melissa Elgin (Tribal Secretary), Greg Sarris (Tribal Chairman), Joan Harper (Tribal Treasurer), Lawrence Stafford (Tribal Member at Large) Federated Indians of Graton Rancheria's Tribal Council celebrates the groundbreaking of the Graton Resort & Casino property expansion.