Thunder Lake
Minnesota — Cass County — Willow River-TR
Location
| State | Minnesota |
| County | Cass |
| River | Willow River-TR |
| Coordinates | 46.96047, -93.95298 |
Physical Characteristics
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | — |
| NID Storage | 8,640 acre-ft |
| Max Storage | 8,640 acre-ft |
| Surface Area | 1,347 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | — |
| EAP Status | Not Required |
| Last Inspection | July 18, 2024 |
| Inspection Frequency | — |
Dam Information
| Year Completed | 1934 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | State |
| Owner | MNDNR-Fisheries |
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.