Dd No 4a is an earth dam located in McPherson County, Kansas. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 2,500 ft long, taller than 59% 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 4a
The primary purpose of Dd No 4a 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 Upper Little Arkansas Wjd No 95 (local government). It impounds the Little Arkansas River.
The dam stands 27 feet tall and stretches 2,500 feet across, creates a reservoir covering 48 acres, has a maximum storage capacity of 1,411 acre-feet, and collects water from a drainage area of 3 square miles.
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 | McPherson |
| River/Stream | Little Arkansas River |
| Coordinates | 38.29374, -97.87327 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 27 ft |
| Dam Length | 2,500 ft |
Storage & Hydraulics
| NID Storage | 1,411 acre-ft |
| Max Storage | 1,411 acre-ft |
| Normal Storage | 219 acre-ft |
| Surface Area | 48 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,260 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Upper Little Arkansas Wjd No 95 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS07397 |
| Federal ID | KS07397 |
| More Info | State Dam Safety Program |