Rock Falls
Key Takeaway
Rock Falls is classified as high hazard in Wisconsin. It was completed in 1864 and is 162 years old. 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 | 43 ft (taller than 94.9% in WI) |
| Dam Length | 80 ft |
| Dam Type | Gravity |
| Max Storage | 80 acre-ft |
| Normal Storage | 30 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 32 sq mi |
| Max Discharge | 4,990 cfs |
| Year Completed | 1864 (162 years old) |
| NID ID | WI00007 |
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
Town of Rock Creek
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Rock Falls?
Rock 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 Rock Falls?
Rock Falls is owned by Town of Rock Creek (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rock Falls built?
Rock Falls was completed in 1864, making it 162 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Rock Falls?
Rock Falls has a dam height of 43 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 Rock Falls last inspected?
Rock Falls was last inspected on August 7, 2008. Inspection dates indicate when a formal review occurred, not the results of that inspection.