White Rock Lake
White Rock Lake is an earth dam located in Nevada County, California, built in 1855. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About White Rock Lake
The primary purpose of White Rock Lake 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 Pacific Gas And Electric Company (private). It impounds the White Rock Creek near Hobart Hills.
The dam stands 14 feet tall and stretches 274 feet across, creates a reservoir covering 90 acres, has a maximum storage capacity of 570 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1855, the structure is one of the older dams in the region, with over a century and a half of service.
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 08/12/2019.
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Location
| State | California |
| County | Nevada |
| Nearest City | Hobart Hills |
| River/Stream | White Rock Creek |
| Coordinates | 39.41770, -120.38890 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 13 ft |
| Dam Length | 274 ft |
| Year Completed | 1855 (171 years old) |
Storage & Hydraulics
| NID Storage | 850 acre-ft |
| Max Storage | 570 acre-ft |
| Normal Storage | 850 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 350 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Pacific Gas and Electric Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/12/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA00373 |
| Federal ID | CA00373 |
| More Info | State Dam Safety Program |