Mill Creek 9a
Key Takeaway
Mill Creek 9a is classified as significant hazard in Wisconsin. It was completed in 1965 and is 61 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 | 29 ft (taller than 79.3% in WI) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 220 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 572 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | WI00389 |
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
Richland County
Local Government
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Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Mill Creek 9a?
Mill Creek 9a 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 9a?
Mill Creek 9a is owned by Richland County (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Creek 9a built?
Mill Creek 9a was completed in 1965, making it 61 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 9a?
Mill Creek 9a serves the following purposes: Flood Risk Reduction, Debris Control. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mill Creek 9a?
Mill Creek 9a has a dam height of 29 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 9a last inspected?
Mill Creek 9a was last inspected on May 20, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.