Mccoy Flat
Low HazardSatisfactory ConditionEmergency Action Plan: No
Location
| County | Lassen |
| River/Stream | Susan River |
| Coordinates | 40.45370, -120.94310 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 650 ft |
| Year Completed | 1891 (135 years old) |
Storage & Hydraulics
| NID Storage | 17,290 acre-ft |
| Max Storage | 17,290 acre-ft |
| Surface Area | 1,800 acres |
| Drainage Area | 110 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Lassen Irrigation Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/27/2025 |
| Emergency Action Plan | No |