Frd No 11
Key Takeaway
Frd No 11 is classified as high hazard in Kansas. It was completed in 1964 and is 62 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 | 49 ft (taller than 97.3% in KS) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 617 acre-ft |
| Normal Storage | 109 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 6,000 cfs |
| Year Completed | 1964 (62 years old) |
| NID ID | KS02437 |
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
ATCHISON, CITY OF
Local Government
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High Hazard 29 ftFrequently Asked Questions
What is the hazard classification of Frd No 11?
Frd No 11 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 Frd No 11?
Frd No 11 is owned by ATCHISON, CITY OF (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Frd No 11 built?
Frd No 11 was completed in 1964, making it 62 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 Frd No 11?
Frd No 11 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 Frd No 11?
Frd No 11 has a dam height of 49 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 Frd No 11 last inspected?
Frd No 11 was last inspected on April 27, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.