Fondulac Dam
Key Takeaway
Fondulac Dam is classified as high hazard in Illinois. It was completed in 1949 and is 77 years old. Its primary use is flood risk reduction. 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 | 74 ft (taller than 97.6% in IL) |
| Dam Length | 1,000 ft |
| Dam Type | Gravity |
| Max Storage | 3.8K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 18,100 cfs |
| Year Completed | 1949 (77 years old) |
| NID ID | IL00006 |
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
USACE - Rock Island District
Federal Government
Nearby Dams
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Low Hazard 42 ftPine Lakes Country Club South Pond Dam
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Low Hazard 50 ftFrequently Asked Questions
What is the hazard classification of Fondulac Dam?
Fondulac 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 Fondulac Dam?
Fondulac Dam is owned by USACE - Rock Island District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Fondulac Dam built?
Fondulac Dam was completed in 1949, making it 77 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 Fondulac Dam?
Fondulac Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Fondulac Dam?
Fondulac Dam has a dam height of 74 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 Fondulac Dam last inspected?
Fondulac Dam was last inspected on June 22, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.