Mill Creek WS Str 4
Key Takeaway
Mill Creek WS Str 4 is classified as low hazard in Illinois. It was completed in 1976 and is 50 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 35 ft (taller than 76.2% in IL) |
| Dam Length | 460 ft |
| Dam Type | Earth |
| Max Storage | 707 acre-ft |
| Normal Storage | 78 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 4,028 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | IL40011 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
MILL CR CONSERVANCY DIST;MILL CR CONSERVANCY DIST
Private
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Significant Hazard 81 ftFrequently Asked Questions
What is the hazard classification of Mill Creek WS Str 4?
Mill Creek WS Str 4 is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mill Creek WS Str 4?
Mill Creek WS Str 4 is owned by MILL CR CONSERVANCY DIST;MILL CR CONSERVANCY DIST (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Creek WS Str 4 built?
Mill Creek WS Str 4 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 WS Str 4?
Mill Creek WS Str 4 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 Mill Creek WS Str 4?
Mill Creek WS Str 4 has a dam height of 35 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 WS Str 4 last inspected?
Mill Creek WS Str 4 was last inspected on June 14, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.