Moccasin Powerhouse and Reservoir

Spring 2013 | Barch Travel Study | CCA

The Hetch Hetchy Power system is composed of three hydroelectric powerhouses: Moccasin Powerhouse, which includes a small, in-line hydroelectric unit, Kirkwood Powerhouse and Holm Powerhouse. The combined total hydroelectric output for these facilities is over 400 megawatts. Hydroelectric generation at Moccasin and Kirkwood Powerhouses rely on gravity-driven water flowing downhill from the Hetch Hetchy Reservoir. Holm Powerhouse generates energy from gravity-driven water flowing downhill from Cherry Lake. On average, the Hetch Hetchy Power System generates 1.7 billion kilowatt hours of clean, hydroelectric energy each year.