21st Street Dam
Key Takeaway
21st Street Dam is classified as high hazard in Kansas. It was completed in 2015 and is 11 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 | 25 ft (taller than 46.5% in KS) |
| Dam Length | 550 ft |
| Dam Type | Earth |
| Max Storage | 303 acre-ft |
| Normal Storage | 66 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 2015 (11 years old) |
| Year Modified | 2020 |
| NID ID | KS09401 |
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
CONCORDIA, CITY OF
Local Government
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of 21st Street Dam?
21st Street Dam 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 21st Street Dam?
21st Street Dam is owned by CONCORDIA, CITY OF (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was 21st Street Dam built?
21st Street Dam was completed in 2015, making it 11 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 21st Street Dam?
21st Street Dam 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 21st Street Dam?
21st Street Dam has a dam height of 25 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 21st Street Dam last inspected?
21st Street Dam was last inspected on April 7, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.