Frd No 21 is a dam located in Atchison County, Kansas, built in 1965. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 37 ft37 ft tall and 370 ft long, taller than 83% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Frd No 21
The primary purpose of Frd No 21 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Atchison, City of (local government). It impounds the White Clay Creek-tr near Atchison.
The dam stands 37 feet tall and stretches 370 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 04/21/2023.
At 37 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Kansas |
| County | Atchison |
| Nearest City | Atchison |
| River/Stream | White Clay Creek-tr |
| Coordinates | 39.54952, -95.15940 |
Physical Characteristics
| NID Height | 37 ft |
| Dam Height | 28 ft |
| Dam Length | 370 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 11 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 485 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Atchison, City of |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/21/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | KS02447 |
| Federal ID | KS02447 |
| More Info | State Dam Safety Program |