Dd No 21
Key Takeaway
Dd No 21 is classified as significant hazard in Kansas. It was completed in 2009 and is 17 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 | 42 ft (taller than 94.1% in KS) |
| Dam Length | 680 ft |
| Dam Type | Earth |
| Max Storage | 691 acre-ft |
| Normal Storage | 76 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,130 cfs |
| Year Completed | 2009 (17 years old) |
| NID ID | KS09328 |
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
ROCK CREEK WD NO 45
Local Government
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Low Hazard 36 ftFrequently Asked Questions
What is the hazard classification of Dd No 21?
Dd 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 Dd No 21?
Dd No 21 is owned by ROCK CREEK WD NO 45 (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Dd No 21 built?
Dd No 21 was completed in 2009, making it 17 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 Dd No 21?
Dd 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 Dd No 21?
Dd No 21 has a dam height of 42 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 Dd No 21 last inspected?
Dd No 21 was last inspected on August 24, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.