Rock Lake 15
Minnesota — Lyon County — Cottonwood River
Location
| State | Minnesota |
| County | Lyon |
| River | Cottonwood River |
| Coordinates | 44.25429, -95.87698 |
Physical Characteristics
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 800 ft |
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Fair |
| EAP Status | Not Required |
| Last Inspection | April 4, 2019 |
| Inspection Frequency | 8 |
Dam Information
| Year Completed | 1988 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Rockfill |
| Owner Type | Local Government |
| Owner | County of Lyon |
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.