Lake Long Bow Dam
Key Takeaway
Lake Long Bow Dam is classified as high hazard in Illinois. It was completed in 1964 and is 62 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 | 12 ft (taller than 10% in IL) |
| Dam Length | 300 ft |
| Dam Type | Earth |
| Max Storage | 60 acre-ft |
| Normal Storage | 30 acre-ft |
| Year Completed | 1964 (62 years old) |
| NID ID | IL50631 |
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
LAKE LONG BOW HOMEOWNER ASSOC
Private
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Significant HazardFrequently Asked Questions
What is the hazard classification of Lake Long Bow Dam?
Lake Long Bow 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 Lake Long Bow Dam?
Lake Long Bow Dam is owned by LAKE LONG BOW HOMEOWNER ASSOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Long Bow Dam built?
Lake Long Bow Dam was completed in 1964, making it 62 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 Lake Long Bow Dam?
Lake Long Bow 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 Lake Long Bow Dam?
Lake Long Bow Dam has a dam height of 12 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 Lake Long Bow Dam last inspected?
Lake Long Bow Dam was last inspected on September 25, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.