Hat Rapids
Key Takeaway
Hat Rapids is classified as high hazard in Wisconsin. It was completed in 1923 and is 103 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 | 30 ft (taller than 81.6% in WI) |
| Dam Length | 1,004 ft |
| Dam Type | Gravity |
| Max Storage | 4.8K acre-ft |
| Normal Storage | 4.8K acre-ft |
| Surface Area | 640 acres |
| Drainage Area | 1,143 sq mi |
| Max Discharge | 12,900 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | WI00770 |
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 Public Service Corporation
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hat Rapids?
Hat Rapids 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 Hat Rapids?
Hat Rapids is owned by Wisconsin Public Service Corporation (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hat Rapids built?
Hat Rapids was completed in 1923, making it 103 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 Hat Rapids?
Hat Rapids 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 Hat Rapids?
Hat Rapids has a dam height of 30 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 Hat Rapids last inspected?
Hat Rapids was last inspected on August 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.