Mill Creek Structure 3 Dam
Key Takeaway
Mill Creek Structure 3 Dam is classified as significant hazard in Illinois. It was completed in 1976 and is 50 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 | 38 ft (taller than 80.7% in IL) |
| Dam Length | 1,030 ft |
| Dam Type | Earth |
| Max Storage | 5.9K acre-ft |
| Normal Storage | 363 acre-ft |
| Surface Area | 88 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 25,654 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | IL01234 |
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
MILL CREEK CONSERVANCY DISTRICT
Private
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Significant Hazard 81 ftFrequently Asked Questions
What is the hazard classification of Mill Creek Structure 3 Dam?
Mill Creek Structure 3 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 Mill Creek Structure 3 Dam?
Mill Creek Structure 3 Dam is owned by MILL CREEK CONSERVANCY DISTRICT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Creek Structure 3 Dam built?
Mill Creek Structure 3 Dam was completed in 1976, making it 50 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 Mill Creek Structure 3 Dam?
Mill Creek Structure 3 Dam serves the following purposes: Flood Risk Reduction, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mill Creek Structure 3 Dam?
Mill Creek Structure 3 Dam has a dam height of 38 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 Mill Creek Structure 3 Dam last inspected?
Mill Creek Structure 3 Dam was last inspected on September 12, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.