The tribe behind River Rock Casino near Geyserville has reached a proposed agreement with Sonoma County establishing a clear path to build a resort-style destination on its existing gaming site, with up to 1,500 slots, a nearly 300-room hotel and other amenities.

The agreement also includes provisions outlining payments to the county, a conditional agreement not to build a casino on its land outside Petaluma and the terms of any future environmental studies.

The deal reflects the Dry Creek Rancheria Band of Pomo Indians’ efforts revise terms from an original 2008 agreement which the tribe deems unfair and comes as it faces financial losses amid competition from newer, larger casinos in the region.