Big Falls
Key Takeaway
Big Falls 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 | 50 ft (taller than 97.5% in WI) |
| Dam Length | 2,196 ft |
| Dam Type | Gravity |
| Max Storage | 4.0K acre-ft |
| Normal Storage | 4.0K acre-ft |
| Surface Area | 369 acres |
| Drainage Area | 1,786 sq mi |
| Max Discharge | 91,000 cfs |
| Year Completed | 1923 (103 years old) |
| NID ID | WI00793 |
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
Northern States Power Co
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Big Falls?
Big Falls 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 Big Falls?
Big Falls is owned by Northern States Power Co (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Falls built?
Big Falls 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 Big Falls?
Big Falls 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 Big Falls?
Big Falls has a dam height of 50 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 Big Falls last inspected?
Big Falls was last inspected on September 20, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.