Mill Picayune Watershed Site B-3
Key Takeaway
Mill Picayune Watershed Site B-3 is classified as high hazard in Iowa. It was completed in 1962 and is 64 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 | 38 ft (taller than 80.1% in IA) |
| Dam Length | 493 ft |
| Dam Type | Earth |
| Max Storage | 247 acre-ft |
| Normal Storage | 70 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | IA00467 |
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
Harrison County SWCD
Local Government
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Low Hazard 47 ftFrequently Asked Questions
What is the hazard classification of Mill Picayune Watershed Site B-3?
Mill Picayune Watershed Site B-3 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 Mill Picayune Watershed Site B-3?
Mill Picayune Watershed Site B-3 is owned by Harrison County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mill Picayune Watershed Site B-3 built?
Mill Picayune Watershed Site B-3 was completed in 1962, making it 64 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 Picayune Watershed Site B-3?
Mill Picayune Watershed Site B-3 serves the following purposes: Flood Risk Reduction, Other, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mill Picayune Watershed Site B-3?
Mill Picayune Watershed Site B-3 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 Picayune Watershed Site B-3 last inspected?
Mill Picayune Watershed Site B-3 was last inspected on July 10, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.