Jonjak
Key Takeaway
Jonjak is classified as low hazard in Wisconsin. It was completed in 1967 and is 59 years old. Its primary use is other.
Physical Details
| Dam Height | 11 ft (taller than 24.3% in WI) |
| Dam Length | 280 ft |
| Dam Type | Earth |
| Max Storage | 130 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1967 (59 years old) |
| NID ID | WI00476 |
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
Tony Jonjak
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Jonjak?
Jonjak 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 Jonjak?
Jonjak is owned by Tony Jonjak (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Jonjak built?
Jonjak was completed in 1967, making it 59 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 Jonjak?
Jonjak serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Jonjak?
Jonjak has a dam height of 11 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.