Preston
California — Amador County — Tr Mule Creek
Location
| State | California |
| County | Amador |
| River | Tr Mule Creek |
| Coordinates | 38.36980, -120.93980 |
Physical Characteristics
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 647 ft |
| NID Storage | 268 acre-ft |
| Max Storage | 268 acre-ft |
| Surface Area | 17 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | November 24, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1949 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | Amador Regional Sanitation Authority |
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.