The casino opened on Jin the Tule River Reservation in California. In 2020, it received approval to be moved from the reservation to free up water for residents. Casino in Porterville, California, United States Eagle Mountain Casinoģ6☀2′02″N 118☄6′35″W / 36.03389°N 118.77639°W / 36.03389 -118.77639Įagle Mountain Casino is an Indian tribal casino operated by the Tule River Indian Tribe of the Tule River Reservation in Porterville, California, adjacent to the Porterville Municipal Airport.