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Nimbus Powerplant

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Related Projects & Facilities
Folsom and Sly Park Units Project
Nimbus Dam
Related Documents
Nimbus Powerplant Performance (pdf)
RegionFacilities in Mid-Pacific | Mid-Pacific Home Page
RiverAmerican River
PurposeNimbus Powerplant is a run-of-the-river plant and provides station service backup for Folsom Powerplant.
FactsNimbus Dam forms Lake Natoma to reregulate the releases for power made through Folsom Powerplant. Nimbus Dam is a concrete gravity structure 87 feet high and 28 feet wide at the crest. The crest is 1,093 feet long.
Present ActivitiesNormal operations. Maintain and regulate river releases.
NERC RegionWestern Electricity Coordinating Council, California-Southern Nevada Power Area
PMA Service AreaWestern Area Power Administration, Sierra Nevada Region
Plant TypeConventional
Powerhouse TypeAbove Ground
Turbine TypeKaplan
Original Nameplate Capacity13,500 kW
Installed Capacity13,500 kW
Year of Initial Operation1955
Age52 years
Net Generation51,097,000 kWh
(Fiscal Year)2007
Rated Head20 ft
Plant Factor43.4 percent
(Fiscal Year)2007
Production ModeBase Load
Remotely OperatedYes
Project AuthorizationFunds for construction of the initial features of the Central Valley Project were provided by the Emergency Relief Appropriation Act of 1935 (49 Stat. 115). The Secretary of the Interior authorized the project and the President approved it on December 2, 1935.
Project PurposeThe Central Valley Project, one of the Nation's major water conservation developments, extends from the Cascade Range on the north to the semiarid but fertile plains along the Kern River on the south. Initial features of the project were built primarily to protect the Central Valley from crippling water shortages and menacing floods. New project units were built to provide water and power to match the continued growth of the State.
Project PurposeAlthough developed primarily for irrigation, this multiple-purpose project also provides flood control, improves Sacramento River navigation, supplies domestic and industrial water, generates electric power, conserves fish and wildlife, creates opportunities for recreation, and enhances water quality.
First nameDrew
Last nameLessard
TitleArea Office Manager, Central California Area Office
Phone (Individual)916 989-7180

Last updated: May 13, 2009