North Fork Diversion
North Fork Diversion is a gravity dam located in Alpine County, California, built in 1989. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About North Fork Diversion
The primary purpose of North 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 Calaveras County Water District (public utility). It impounds the North Fork Stanislaus River near Dorrington.
The dam stands 53 feet tall and stretches 220 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 340 acre-feet, and collects water from a drainage area of 27 square miles. Completed in 1989, the structure is 37 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 08/09/2022.
At 53 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | California |
| County | Alpine |
| Nearest City | Dorrington |
| River/Stream | North Fork Stanislaus River |
| Coordinates | 38.43850, -120.01680 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 53 ft |
| Dam Height | 53 ft |
| Dam Length | 220 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 340 acre-ft |
| Max Storage | 340 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 27 sq mi |
| Max Discharge | 16,300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Calaveras County Water District |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/09/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA01234 |
| Federal ID | CA01234 |
| More Info | State Dam Safety Program |