South Fork Diversion

South Fork Diversion is a concrete dam located in Plumas County, California, built in 1961. It carries a Low hazard potential classification and has a satisfactory condition assessment.

Hazard potentialLowFailure would cause limited damage
ConditionSatisfactoryBest of 4 ratings
Emergency action planNot reported
Last inspection06/03/2022
Height60 ft
Built196165 years ago

Dam profile

NID height · 60 ft
60 FT TEN-STORY BUILDINGMEDIAN U.S. DAM · 24 FT

60 ft tall and 228 ft long, taller than 95% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic concrete gravity section and the water level is illustrative.

About South Fork Diversion

The primary purpose of South Fork Diversion is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by South Feather Water and Power Agency (public utility). It impounds the South Fork Feather River near Woodleaf Powerhouse.

The dam stands 60 feet tall and stretches 228 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 87 acre-feet, and collects water from a drainage area of 37 square miles. Completed in 1961, the structure is well into its service life at over 50 years old.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/03/2022.

At 60 feet, this dam is taller than 95% of all dams in the United States.

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Location

StateCalifornia
CountyPlumas
Nearest CityWoodleaf Powerhouse
River/StreamSouth Fork Feather River
Coordinates39.64860, -121.11830

Physical Characteristics

Dam TypeConcrete
NID Height60 ft
Dam Height60 ft
Dam Length228 ft
Year Completed1961 (65 years old)

Storage & Hydraulics

NID Storage87 acre-ft
Max Storage87 acre-ft
Normal Storage87 acre-ft
Surface Area3 acres
Drainage Area37 sq mi
Max Discharge20,700 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeHydroelectric
OwnerSouth Feather Water and Power Agency
Owner TypePublic Utility
Hazard ClassificationLow
Condition AssessmentSatisfactory
Last Inspection06/03/2022
Emergency Action PlanNot Required

Identifiers

NID IDCA00270
Federal IDCA00270
More InfoState Dam Safety Program