San Dimas
California — Los Angeles County — San Dimas Creek
Location
| State | California |
| County | Los Angeles |
| River | San Dimas Creek |
| Coordinates | 34.15430, -117.77320 |
Physical Characteristics
| NID Height | 131 ft |
| Dam Height | 131 ft |
| Dam Length | 340 ft |
| NID Storage | 1,534 acre-ft |
| Max Storage | 1,534 acre-ft |
| Surface Area | 36 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | November 18, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1922 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Gravity |
| Owner Type | Local Government |
| Owner | Los Angeles County Department Of Public Works |
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.