Antioch Reservoir
California — Contra Costa County — Tr San Joaquin Riv
Location
| State | California |
| County | Contra Costa |
| River | Tr San Joaquin Riv |
| Coordinates | 37.97790, -121.80900 |
Physical Characteristics
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 450 ft |
| NID Storage | 722 acre-ft |
| Max Storage | 722 acre-ft |
| Surface Area | 61 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | October 17, 2024 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1935 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | City of Antioch |
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.