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Thermalito Forebay Dam and Forebay
Constructed between 1965 and 1968, Thermalito Forebay is an offstream reservoir contained by Thermalito Forebay Dam on the south and east and by Campbell Hills on the north and west. It is located about four miles west of the city of Oroville. The forebay conveys generating and pumping flows between Thermalito Power Canal and Thermalito Pumping-Generating Plant, provides regulatory storage and surge damping for the Hyatt-Thermalito power complex, and serves as a recreational site.


Thermalito Afterbay Dam & Afterbay
Located about six miles southwest of the city of Oroville, Thermalito Afterbay is an offstream reservoir. The Afterbay provides storage for the water required by the pumpback operation to Lake Oroville, helps regulate the power system, produces controlled flow in the Feather River downstream from the Oroville-Thermalito facilities and provides recreation. Thermalito Afterbay Dam has the longest crest in the SWP system. The facility was constructed from 1965 to 1968.