Nimbus Dam was constructed as part of the Central Valley Project which was formulated in the late 1930’s. Nimbus was designed to moderate flows from Folsom Dam for hydroelectric generation and to provide for the Folsom South Canal. It has very little flood control capacity. The Nimbus hatchery was a mitigation measure by the USACE for loss of salmon and steelhead spawning habitat for the upper American [all wrapped into the CVP].
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