Cox Hollow Number One
Key Takeaway
Cox Hollow Number One is classified as low hazard in Wisconsin. It was completed in 1961 and is 65 years old. Its primary use is recreation.
Physical Details
| Dam Height | 37 ft (taller than 90.3% in WI) |
| Dam Length | 625 ft |
| Dam Type | Earth |
| Max Storage | 1.0K acre-ft |
| Normal Storage | 950 acre-ft |
| Surface Area | 96 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 860 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | WI00012 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
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
Nearby Dams
Cox Hollow Number Two
Iowa, WI
High Hazard 55 ftHalverson
Iowa, WI
Low Hazard 37 ftTwin Parks 12
Iowa, WI
Low Hazard 37 ftTwin Parks 4
Iowa, WI
Low Hazard 31 ftTwin Parks 3
Iowa, WI
Low Hazard 33 ftOtter Creek 12
Iowa, WI
Low Hazard 58 ftTwin Parks 6
Iowa, WI
Low Hazard 26 ftWright
Iowa, WI
Low Hazard 13 ftFrequently Asked Questions
What is the hazard classification of Cox Hollow Number One?
Cox Hollow Number One is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. 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 One?
Cox Hollow Number One 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 One built?
Cox Hollow Number One was completed in 1961, making it 65 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 One?
Cox Hollow Number One 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 One?
Cox Hollow Number One has a dam height of 37 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 One last inspected?
Cox Hollow Number One was last inspected on November 9, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.