Longley
Longley is an earth dam located in Inyo County, California, built in 1910. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Longley
The primary purpose of Longley 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 Southern California Edison Company (private). It impounds the Mcgee Creek near Bishop.
The dam stands 27 feet tall and stretches 120 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 178 acre-feet. Completed in 1910, 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. The most recent inspection on record was 08/22/2018.
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Location
| State | California |
| County | Inyo |
| Nearest City | Bishop |
| River/Stream | Mcgee Creek |
| Coordinates | 37.28500, -118.65890 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 120 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 178 acre-ft |
| Max Storage | 178 acre-ft |
| Normal Storage | 178 acre-ft |
| Surface Area | 11 acres |
| Max Discharge | 300 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Southern California Edison Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/22/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA00447 |
| Federal ID | CA00447 |
| More Info | State Dam Safety Program |