Upper Little Nemaha 61 is an earth dam located in Otoe County, Nebraska, built in 2001. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 44 ft44 ft tall and 1,460 ft long, taller than 89% 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 Upper Little Nemaha 61
Upper Little Nemaha 61 is a dam in Otoe, Nebraska. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Tr-hooper Creek near Unadilla.
The dam stands 44 feet tall and stretches 1,460 feet across, creates a reservoir covering 23 acres, has a maximum storage capacity of 727 acre-feet, and collects water from a drainage area of 2 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 05/10/2023.
At 44 feet, this dam is taller than 89% of dams nationwide.
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Location
| State | Nebraska |
| County | Otoe |
| Nearest City | Unadilla |
| River/Stream | Tr-hooper Creek |
| Coordinates | 40.77780, -96.36768 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 44 ft |
| Dam Height | 39 ft |
| Dam Length | 1,460 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 727 acre-ft |
| Max Storage | 727 acre-ft |
| Normal Storage | 113 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 907 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/10/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02607 |
| Federal ID | NE02607 |
| More Info | State Dam Safety Program |