Offerdahl-Johnson Dam
Montana — Phillips County — LITTLE SEVEN MILE CREEK
Location
| State | Montana |
| County | Phillips |
| River | LITTLE SEVEN MILE CREEK |
| Coordinates | 48.00150, -107.66960 |
Physical Characteristics
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 1,840 ft |
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
| Surface Area | 132 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | — |
| EAP Status | Not Required |
| Last Inspection | — |
| Inspection Frequency | — |
Dam Information
| Year Completed | 1980 |
| Primary Purpose | Irrigation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | AETNA INSURANCE COMPANY |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.