Eau Pleine
Key Takeaway
Eau Pleine is classified as high hazard in Wisconsin. It was completed in 1937 and is 89 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 45 ft (taller than 95.9% in WI) |
| Dam Length | 8,599 ft |
| Dam Type | Gravity |
| Max Storage | 98.1K acre-ft |
| Normal Storage | 98.1K acre-ft |
| Surface Area | 6,677 acres |
| Drainage Area | 370 sq mi |
| Max Discharge | 20,767 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | WI00753 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Wisconsin Valley Improvement Company
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Eau Pleine?
Eau Pleine is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Eau Pleine?
Eau Pleine is owned by Wisconsin Valley Improvement Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Eau Pleine built?
Eau Pleine was completed in 1937, making it 89 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Eau Pleine?
Eau Pleine serves the following purposes: Hydroelectric, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Eau Pleine?
Eau Pleine has a dam height of 45 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Eau Pleine last inspected?
Eau Pleine was last inspected on August 1, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.