Upper Little Nemaha 25 is an earth dam located in Lancaster County, Nebraska, built in 2001. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 50 ft50 ft tall and 960 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Upper Little Nemaha 25
Upper Little Nemaha 25 is a dam in Lancaster, Nebraska. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Tr-little Nemaha River near Palmyra.
The dam stands 50 feet tall and stretches 960 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 452 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2001, 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 09/20/2023.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Nebraska |
| County | Lancaster |
| Nearest City | Palmyra |
| River/Stream | Tr-little Nemaha River |
| Coordinates | 40.67803, -96.47333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 44 ft |
| Dam Length | 960 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 452 acre-ft |
| Max Storage | 452 acre-ft |
| Normal Storage | 79 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 870 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/20/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02606 |
| Federal ID | NE02606 |
| More Info | State Dam Safety Program |