Frd No 21 is an earth dam located in Butler County, Kansas, built in 1965. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 1,750 ft long, taller than 74% 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 Little Walnut-hickory Wjd No 18 (local government). It impounds the So Br Little Walnut River-tr near Leon.
The dam stands 32 feet tall and stretches 1,750 feet across, creates a reservoir covering 118 acres, and has a maximum storage capacity of 1,511 acre-feet. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Kansas |
| County | Butler |
| Nearest City | Leon |
| River/Stream | So Br Little Walnut River-tr |
| Coordinates | 37.67015, -96.56807 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 1,750 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 1,511 acre-ft |
| Max Storage | 1,511 acre-ft |
| Normal Storage | 149 acre-ft |
| Surface Area | 118 acres |
| Max Discharge | 1,445 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Little Walnut-hickory Wjd No 18 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS02102 |
| Federal ID | KS02102 |
| More Info | State Dam Safety Program |