Mountain Lake
Mountain Lake is an other dam located in Cottonwood County, Minnesota, built in 1960. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Mountain Lake
The primary purpose of Mountain Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mndnr (state). It impounds the Blue Earth River-tr near Mountain Lake.
The dam stands 15 feet tall and stretches 25 feet across, creates a reservoir covering 230 acres, has a maximum storage capacity of 1,832 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1960, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/28/2022.
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Location
| State | Minnesota |
| County | Cottonwood |
| Nearest City | Mountain Lake |
| River/Stream | Blue Earth River-tr |
| Coordinates | 43.95307, -94.93864 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 15 ft |
| Dam Height | 10 ft |
| Dam Length | 25 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 1,832 acre-ft |
| Max Storage | 1,832 acre-ft |
| Normal Storage | 1,145 acre-ft |
| Surface Area | 230 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MNDNR |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/28/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00165 |
| Federal ID | MN00165 |
| More Info | State Dam Safety Program |