Frd No 21
Key Takeaway
Frd No 21 is classified as significant hazard in Kansas. 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 | 28 ft (taller than 62.6% in KS) |
| Dam Length | 370 ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 11 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 485 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | KS02447 |
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
ATCHISON, CITY OF
Local Government
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What is the hazard classification of Frd No 21?
Frd No 21 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 Frd No 21?
Frd No 21 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 21 built?
Frd No 21 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 Frd No 21?
Frd No 21 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 21?
Frd No 21 has a dam height of 28 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 21 last inspected?
Frd No 21 was last inspected on April 21, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.