Upper Little Nemaha 31 East
Upper Little Nemaha 31 East is an earth dam located in Otoe County, Nebraska, built in 2002. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Little Nemaha 31 East
The primary purpose of Upper Little Nemaha 31 East 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 Palmyra.
The dam stands 40 feet tall and stretches 905 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 338 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2002, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/06/2021.
At 40 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | Nebraska |
| County | Otoe |
| Nearest City | Palmyra |
| River/Stream | Tr-little Nemaha River |
| Coordinates | 40.71434, -96.43668 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 34 ft |
| Dam Length | 905 ft |
| Year Completed | 2002 (24 years old) |
Storage & Hydraulics
| NID Storage | 338 acre-ft |
| Max Storage | 338 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,094 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/06/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02647 |
| Federal ID | NE02647 |
| More Info | State Dam Safety Program |