Cox Hollow Number Two
Key Takeaway
Cox Hollow Number Two is classified as high hazard in Wisconsin. It was completed in 1965 and is 61 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 | 55 ft (taller than 98.1% in WI) |
| Dam Length | 630 ft |
| Dam Type | Earth |
| Max Storage | 5.4K acre-ft |
| Normal Storage | 1.9K acre-ft |
| Surface Area | 152 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 606 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | WI00013 |
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 Department of Natural Resources
State Government
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Low Hazard 58 ftFrequently Asked Questions
What is the hazard classification of Cox Hollow Number Two?
Cox Hollow Number Two 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 Cox Hollow Number Two?
Cox Hollow Number Two is owned by Wisconsin Department of Natural Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cox Hollow Number Two built?
Cox Hollow Number Two was completed in 1965, making it 61 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 Cox Hollow Number Two?
Cox Hollow Number Two 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 Cox Hollow Number Two?
Cox Hollow Number Two has a dam height of 55 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 Cox Hollow Number Two last inspected?
Cox Hollow Number Two was last inspected on November 9, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.