St. Olaf Lake
St. Olaf Lake is an other dam located in Waseca County, Minnesota, built in 1940. It carries a Low hazard potential classification and has a fair condition assessment.
About St. Olaf Lake
The primary purpose of St. Olaf 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 Le Sueur River-tr near Wilton.
The dam stands 7 feet tall and stretches 21 feet across, creates a reservoir covering 90 acres, has a maximum storage capacity of 1,494 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 05/09/2024.
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Location
| State | Minnesota |
| County | Waseca |
| Nearest City | Wilton |
| River/Stream | Le Sueur River-tr |
| Coordinates | 43.90029, -93.41762 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 7 ft |
| Dam Height | 6 ft |
| Dam Length | 21 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 1,494 acre-ft |
| Max Storage | 1,494 acre-ft |
| Normal Storage | 1,245 acre-ft |
| Surface Area | 90 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 245 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | MNDNR |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/09/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00109 |
| Federal ID | MN00109 |
| More Info | State Dam Safety Program |