Gem Lake
California — Mono County — Rush Creek
Location
| State | California |
| County | Mono |
| River | Rush Creek |
| Coordinates | 37.75110, -119.14140 |
Physical Characteristics
| NID Height | 80 ft |
| Dam Height | 80 ft |
| Dam Length | 688 ft |
| NID Storage | 17,228 acre-ft |
| Max Storage | 17,228 acre-ft |
| Surface Area | 282 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Poor |
| EAP Status | Yes |
| Last Inspection | August 20, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1917 |
| Primary Purpose | Hydroelectric |
| Dam Type | Concrete |
| Owner Type | Private |
| Owner | Southern California Edison Company |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.