Pleasant Valley No. 1
Pleasant Valley No. 1 is an earth dam located in Winona County, Minnesota, built in 1968. It carries a Significant hazard potential classification and has a fair condition assessment.
About Pleasant Valley No. 1
The primary purpose of Pleasant Valley No. 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Hundorf (private). It impounds the Pleasant Valley Creek near Winona.
The dam stands 38 feet tall and stretches 470 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 80 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1968, 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 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 04/26/2023.
At 38 feet, this dam is taller than 85% of dams nationwide.
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Location
| State | Minnesota |
| County | Winona |
| Nearest City | Winona |
| River/Stream | Pleasant Valley Creek |
| Coordinates | 43.95177, -91.62264 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 34 ft |
| Dam Length | 470 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 80 acre-ft |
| Max Storage | 80 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,123 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Hundorf |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 04/26/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MN00431 |
| Federal ID | MN00431 |
| More Info | State Dam Safety Program |