Every three days, Kathleen Sullivan Kelley hauls water from the town of Meeker to fill a 500-gallon tank at her ranch in Rio Blanco County. Kelley’s horses used to drink from ponds on the property, but there’s no longer any surface water, and she and her husband, Reed, sold the last of the 200 cows they once raised. Kelley, 71, is concerned that the ranch could eventually be cut off from the city water source due to worsening drought. A year ag…