Vanwinkle Lake Dam
Key Takeaway
Vanwinkle Lake Dam is classified as high hazard in Illinois. It was completed in 1900 and is 126 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 | 20 ft (taller than 28.2% in IL) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 178 acre-ft |
| Normal Storage | 99 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 1,201 cfs |
| Year Completed | 1900 (126 years old) |
| NID ID | IL00143 |
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
WALLJASPER
Private
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High Hazard 50 ftFrequently Asked Questions
What is the hazard classification of Vanwinkle Lake Dam?
Vanwinkle Lake Dam 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 Vanwinkle Lake Dam?
Vanwinkle Lake Dam is owned by WALLJASPER (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Vanwinkle Lake Dam built?
Vanwinkle Lake Dam was completed in 1900, making it 126 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 Vanwinkle Lake Dam?
Vanwinkle Lake Dam 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 Vanwinkle Lake Dam?
Vanwinkle Lake Dam has a dam height of 20 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 Vanwinkle Lake Dam last inspected?
Vanwinkle Lake Dam was last inspected on May 11, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.