Upper Little Nemaha 23
Upper Little Nemaha 23 is an earth dam located in Lancaster County, Nebraska, built in 2002. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Upper Little Nemaha 23
The primary purpose of Upper Little Nemaha 23 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 Natural Resources District (local government). It impounds the Tr-little Nemaha River near Rural Bennet.
The dam stands 57 feet tall and stretches 1,735 feet across, creates a reservoir covering 42 acres, has a maximum storage capacity of 3,210 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 2002, the structure is relatively new.
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 04/19/2023.
At 57 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Nebraska |
| County | Lancaster |
| Nearest City | Rural Bennet |
| River/Stream | Tr-little Nemaha River |
| Coordinates | 40.66611, -96.51192 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 57 ft |
| Dam Height | 51 ft |
| Dam Length | 1,735 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 3,210 acre-ft |
| Max Storage | 3,210 acre-ft |
| Normal Storage | 269 acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 15,009 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/19/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NE02645 |
| Federal ID | NE02645 |
| More Info | State Dam Safety Program |