Utica Auxiliary No. 5
Utica Auxiliary No. 5 is a rockfill dam located in Alpine County, California, built in 1903. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Utica Auxiliary No. 5
The primary purpose of Utica Auxiliary No. 5 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 Northern California Power Agency (private). It impounds the North Fork Stanislaus River - near Dorrington.
The dam stands 7 feet tall and stretches 31 feet across, creates a reservoir covering 233 acres, has a maximum storage capacity of 2,500 acre-feet, and collects water from a drainage area of 15 square miles. Completed in 1903, the structure is over a century 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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/09/2022.
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Location
| State | California |
| County | Alpine |
| Nearest City | Dorrington |
| River/Stream | North Fork Stanislaus River - |
| Coordinates | 38.44330, -119.99670 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 31 ft |
| Year Completed | 1903 (123 years old) |
Storage & Hydraulics
| NID Storage | 2,500 acre-ft |
| Max Storage | 2,500 acre-ft |
| Normal Storage | 2,350 acre-ft |
| Surface Area | 233 acres |
| Drainage Area | 15 sq mi |
| Max Discharge | 1,100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Northern California Power Agency |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/09/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA00427 |
| Federal ID | CA00427S004 |
| More Info | State Dam Safety Program |