Pony Creek Watershed Site 21
Key Takeaway
Pony Creek Watershed Site 21 is classified as high hazard in Iowa. It was completed in 1971 and is 55 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 | 75 ft (taller than 99.7% in IA) |
| Dam Length | 968 ft |
| Dam Type | Earth |
| Max Storage | 3.7K acre-ft |
| Normal Storage | 1.1K acre-ft |
| Surface Area | 83 acres |
| Drainage Area | 14 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | IA00675 |
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
Pony Creek Drainage District
Local Government
Nearby Dams
Pony Creek Watershed Site 20
Mills, IA
Low Hazard 48 ftPony Creek Watershed Site 22
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Low Hazard 48 ftPony Creek Watershed Site 26
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Low Hazard 37 ftPony Creek Watershed Site 30
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Significant Hazard 49 ftPony Creek Watershed Site 24
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Low Hazard 40 ftPony Creek Watershed Site 17
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Low Hazard 62 ftPony Creek Watershed Site 31
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Low Hazard 38 ftPony Creek Watershed Site 15
Mills, IA
Low Hazard 48 ftFrequently Asked Questions
What is the hazard classification of Pony Creek Watershed Site 21?
Pony Creek Watershed Site 21 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 Pony Creek Watershed Site 21?
Pony Creek Watershed Site 21 is owned by Pony Creek Drainage District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pony Creek Watershed Site 21 built?
Pony Creek Watershed Site 21 was completed in 1971, making it 55 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 Pony Creek Watershed Site 21?
Pony Creek Watershed Site 21 serves the following purposes: Flood Risk Reduction, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Pony Creek Watershed Site 21?
Pony Creek Watershed Site 21 has a dam height of 75 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 Pony Creek Watershed Site 21 last inspected?
Pony Creek Watershed Site 21 was last inspected on August 1, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.