Gs Dd No 17-20a is an earth dam located in Brown County, Kansas, built in 1994. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 450 ft long, taller than 68% 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 Gs Dd No 17-20a
The primary purpose of Gs Dd No 17-20a 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 Nemaha-brown Wjd No 7 (local government). It impounds the Greggs Creek-tr.
The dam stands 30 feet tall and stretches 450 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 144 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1994, the structure is 32 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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks.
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Location
| State | Kansas |
| County | Brown |
| River/Stream | Greggs Creek-tr |
| Coordinates | 39.68459, -95.76407 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 450 ft |
| Year Completed | 1994 (32 years old) |
Storage & Hydraulics
| NID Storage | 144 acre-ft |
| Max Storage | 144 acre-ft |
| Normal Storage | 49 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha-brown Wjd No 7 |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | KS09226 |
| Federal ID | KS09226 |
| More Info | State Dam Safety Program |