Mary Street
California — Riverside County — Alessandro Wash
Location
| State | California |
| County | Riverside |
| River | Alessandro Wash |
| Coordinates | 33.93310, -117.37740 |
Physical Characteristics
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 1,035 ft |
| NID Storage | 320 acre-ft |
| Max Storage | 320 acre-ft |
| Surface Area | 19 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | December 1, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1981 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | Riverside 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.