Dd No 21 is an earth dam located in Brown County, Kansas, built in 2003. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 1,100 ft long, taller than 76% 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 Dd No 21
The primary purpose of Dd 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 Pony Creek Wjd No 78 (local government). It impounds the Pony Creek-tr.
The dam stands 33 feet tall and stretches 1,100 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 377 acre-feet. Completed in 2003, the structure is relatively new.
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. The most recent inspection on record was 10/15/2019.
At 33 feet, this dam is taller than 76% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Kansas |
| County | Brown |
| River/Stream | Pony Creek-tr |
| Coordinates | 39.95015, -95.71935 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 1,100 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 377 acre-ft |
| Max Storage | 377 acre-ft |
| Normal Storage | 92 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Pony Creek Wjd No 78 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/15/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS09049 |
| Federal ID | KS09049 |
| More Info | State Dam Safety Program |