Big Santa Anita
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Los Angeles |
| Nearest City | Sierra Madre |
| River/Stream | Tr Rio Hondo |
| Coordinates | 34.18400, -118.02010 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 225 ft |
| Dam Height | 225 ft |
| Dam Length | 612 ft |
| Year Completed | 1927 (99 years old) |
Storage & Hydraulics
| NID Storage | 858 acre-ft |
| Max Storage | 858 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 10 sq mi |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Los Angeles County Department Of Public Works |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/22/2025 |
| Emergency Action Plan | Yes |