Nimbus Dam

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Nimbus Dam
Country United States
Location Sacramento County, California
Coordinates 38°38′10″N 121°13′11″W / 38.636095°N 121.219806°W / 38.636095; -121.219806Coordinates: 38°38′10″N 121°13′11″W / 38.636095°N 121.219806°W / 38.636095; -121.219806,inline
Status Operational
Construction began 1952
Opening date 1955
Owner(s) Bureau of Reclamation
Dam and spillways
Impounds American River
Height 87 ft (27 m)
Length 1,093 ft (333 m)
Elevation at crest 132 ft (40 m)
Width (crest) 28 ft (8.5 m)
Width (base) 135 ft (41 m)
Dam volume 8,760 acre feet (10,810 dam3)
Creates Lake Natoma
Catchment area 1,898 sq mi (4,920 km2)
Power station
Installed capacity 13.5 MW
Annual generation 51,097,000 KWh

The Nimbus Dam is a base load hydroelectric dam on the American River near Folsom, California. Approximately 8,700 acre feet (10,700 dam3) of water is retained by the dam. It is responsible for the impoundment of water from the American River to create the Lake Natoma reservoir.

As part of the Central Valley Project (CVP), a federal water project that provides irrigation and municipal water to much of California's Central Valley, it was authorized in 1949 as a regulating reservoir for Folsom Dam, and a diversion pool for the Folsom South Canal.[1][2] Construction began in 1952, and it opened in 1955.

The Nimbus recreational area. The dam can be seen in the background.

See also[edit]


  1. ^ House Report 107-651
  2. ^ American River Basin Development Act, Pub.L. 81–356, 63 Stat. 852, enacted October 14, 1949

External links[edit]