Mason Dam is a rolled-earth and rockfill structure 173 feet in height with a crest length of 895 feet. Phillips Lake, impounded behind the dam, covers 2,235 acres and has a total capacity of 95,500 acre-feet (active 90,500 acre-feet). The main Lilley Pumping Plant, consisting of four vertical-shaft turbine-type pumps with a total capacity of 68 cubic feet per second, serves 3,450 acres with water. The Lilley Relift Plant has three vertical-shaft mixed flow pumps totaling 34 cubic feet per second and capable of serving 670 acres. |
