The county Board of Supervisors is tentatively scheduled to consider the agreement at its Jan. “We have come a long way in our intergovernmental relationships and this agreement is yet another step forward,” Sonoma County Supervisor David Rabbitt said in an email regarding the proposed 10-year extension. A longstanding agreement between Sonoma County and the Dry Creek Rancheria Band of Pomo Indians is poised to be extended another decade, preventing the tribe from building a casino near Petaluma’s southern border until at least 2035.