Preston Forebay
Low HazardSatisfactory ConditionEmergency Action Plan: No
Location
| County | Amador |
| River/Stream | Offstream |
| Coordinates | 38.37540, -120.92330 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 176 ft |
| Year Completed | 1892 (134 years old) |
Storage & Hydraulics
| NID Storage | 30 acre-ft |
| Max Storage | 30 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Amador Regional Sanitation Authority |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/24/2025 |
| Emergency Action Plan | No |