Nicole Horseherder lives in Hard Rock, Ariz., population 53. Hard Rock sits on the Black Mesa, which takes its name from the numerous coal seams running through the plateau in western Arizona. Horseherder’s home has no running water, as it is prohibitively expensive to drill down to the nearest aquifer that has potable water. Twice a week, she drives her 20-year-old, three-quarter-ton GMC pickup—towing a 500-gal. tank mounted on a flatbed trailer—to a community well 25 miles away. Coal and water have dominated Horseherder’s life and work for the past decade.