Big Dalton Debris Basin
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Los Angeles |
| Nearest City | Glendora |
| River/Stream | Big Dalton Wash |
| Coordinates | 34.15620, -117.83470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 59 ft |
| Dam Height | 59 ft |
| Dam Length | 840 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 208 acre-ft |
| Max Storage | 208 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 7 sq mi |
Ownership & Safety
| Purpose | Debris Control |
| Owner | Los Angeles County Department Of Public Works |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/02/2025 |
| Emergency Action Plan | Yes |