 Park officials say the water line was recently shut off for repairs, and crews were trying to repressurize the line when the break occurred. It's unclear now when repairs will be completed. The National Park Service is in the process of replacing the 12.5-mile pipeline that was constructed in the 1960s. Park officials say the water line has had more than 85 breaks since 2010, with the cost to repair a single break often exceeding $25,000.