St. Charles Dam
Key Takeaway
St. Charles Dam is classified as significant hazard in Illinois. It was completed in 1918 and is 108 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 7 ft (taller than 0.5% in IL) |
| Dam Length | 300 ft |
| Dam Type | Gravity |
| Max Storage | 143 acre-ft |
| Normal Storage | 143 acre-ft |
| Year Completed | 1918 (108 years old) |
| NID ID | IL00913 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ILLINOIS DEPARTMENT OF NATURAL RESOURCES
Private
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Low Hazard 15 ftFrequently Asked Questions
What is the hazard classification of St. Charles Dam?
St. Charles Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates St. Charles Dam?
St. Charles Dam is owned by ILLINOIS DEPARTMENT OF NATURAL RESOURCES (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was St. Charles Dam built?
St. Charles Dam was completed in 1918, making it 108 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 St. Charles Dam?
St. Charles 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 St. Charles Dam?
St. Charles Dam has a dam height of 7 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 St. Charles Dam last inspected?
St. Charles Dam was last inspected on April 26, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.