Arnold-Armstrong Subwtrshd Gully 23
Key Takeaway
Arnold-Armstrong Subwtrshd Gully 23 is classified as significant hazard in Iowa. It was completed in 1961 and is 65 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 36 ft (taller than 74.2% in IA) |
| Dam Length | 470 ft |
| Dam Type | Earth |
| Max Storage | 35 acre-ft |
| Normal Storage | 15 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | IA00788 |
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
Monona County SWCD
Local Government
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Low Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Arnold-Armstrong Subwtrshd Gully 23?
Arnold-Armstrong Subwtrshd Gully 23 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 Arnold-Armstrong Subwtrshd Gully 23?
Arnold-Armstrong Subwtrshd Gully 23 is owned by Monona County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Arnold-Armstrong Subwtrshd Gully 23 built?
Arnold-Armstrong Subwtrshd Gully 23 was completed in 1961, making it 65 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 Arnold-Armstrong Subwtrshd Gully 23?
Arnold-Armstrong Subwtrshd Gully 23 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Arnold-Armstrong Subwtrshd Gully 23?
Arnold-Armstrong Subwtrshd Gully 23 has a dam height of 36 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 Arnold-Armstrong Subwtrshd Gully 23 last inspected?
Arnold-Armstrong Subwtrshd Gully 23 was last inspected on November 4, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.