Grinding Rock
Low HazardSatisfactory ConditionEmergency Action Plan: No
Location
| County | Tuolumne |
| River/Stream | Tr Turnback Cr |
| Coordinates | 37.93670, -120.25760 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 525 ft |
| Year Completed | 1979 (47 years old) |
Storage & Hydraulics
| NID Storage | 330 acre-ft |
| Max Storage | 330 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Tuolumne City Sanitary District |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/21/2025 |
| Emergency Action Plan | No |