The U.S. Supreme Court announced Monday that it will not hear an appeal by California water agencies in the Agua Caliente Band of Cahuilla Indians’ landmark lawsuit asserting rights to groundwater beneath the tribe’s reservation. The Desert Water Agency and the Coachella Valley Water Disitrict had appealed to challenge a decision by the Ninth Circuit Court of Appeals, which ruled the tribe has a right to groundwater dating back to the federal government’s creation of the reservation in the 1870s.