Grinding Rock
California — Tuolumne County — Tr Turnback Cr
Location
| State | California |
| County | Tuolumne |
| River | Tr Turnback Cr |
| Coordinates | 37.93670, -120.25760 |
Physical Characteristics
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 525 ft |
| NID Storage | 330 acre-ft |
| Max Storage | 330 acre-ft |
| Surface Area | 14 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | No |
| Last Inspection | October 21, 2025 |
| Inspection Frequency | 0.5 |
Dam Information
| Year Completed | 1979 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | Tuolumne City Sanitary District |
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.