Upper Sand Creek Detention Basin
California — Contra Costa County — Sand Creek
Location
| State | California |
| County | Contra Costa |
| River | Sand Creek |
| Coordinates | 37.94500, -121.76400 |
Physical Characteristics
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,400 ft |
| NID Storage | 895 acre-ft |
| Max Storage | 895 acre-ft |
| Surface Area | 44 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | January 7, 2026 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 2014 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | Contra Costa County Flood Control and Water Conservation 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.