Old Stone Mill
Key Takeaway
Old Stone Mill is classified as high hazard in Wisconsin. It was completed in 1839 and is 187 years old. Its primary use is recreation. 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 | 17 ft (taller than 53.1% in WI) |
| Dam Length | 200 ft |
| Dam Type | Gravity |
| Max Storage | 940 acre-ft |
| Normal Storage | 187 acre-ft |
| Surface Area | 68 acres |
| Drainage Area | 28 sq mi |
| Max Discharge | 2,100 cfs |
| Year Completed | 1839 (187 years old) |
| NID ID | WI00214 |
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
City Of Whitewater
Local Government
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High Hazard 17 ftFrequently Asked Questions
What is the hazard classification of Old Stone Mill?
Old Stone Mill 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 Old Stone Mill?
Old Stone Mill is owned by City Of Whitewater (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Old Stone Mill built?
Old Stone Mill was completed in 1839, making it 187 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 Old Stone Mill?
Old Stone Mill serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Old Stone Mill?
Old Stone Mill has a dam height of 17 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 Old Stone Mill last inspected?
Old Stone Mill was last inspected on March 25, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.