Big Johnson
Low HazardSatisfactory ConditionEmergency Action Plan: No
Location
| County | Modoc |
| River/Stream | Tr Lost River |
| Coordinates | 41.94580, -121.21960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 1,900 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 410 acre-ft |
| Max Storage | 410 acre-ft |
| Surface Area | 65 acres |
| Drainage Area | 3 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Stanley Johnson |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/29/2025 |
| Emergency Action Plan | No |