Puddingstone
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Los Angeles |
| Nearest City | San Dimas |
| River/Stream | Walnut Creek |
| Coordinates | 34.09090, -117.80840 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 147 ft |
| Dam Height | 147 ft |
| Dam Length | 2,698 ft |
| Year Completed | 1928 (98 years old) |
Storage & Hydraulics
| NID Storage | 16,342 acre-ft |
| Max Storage | 16,342 acre-ft |
| Surface Area | 490 acres |
| Drainage Area | 33 sq mi |
| Max Discharge | 28,970 cfs |
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 | 10/22/2025 |
| Emergency Action Plan | Yes |