Upper Little Nemaha 34
Upper Little Nemaha 34 is an earth dam located in Otoe County, Nebraska, built in 1996. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Little Nemaha 34
The primary purpose of Upper Little Nemaha 34 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 Silver Creek near Unadilla.
The dam stands 52 feet tall and stretches 1,280 feet across, creates a reservoir covering 44 acres, has a maximum storage capacity of 1,637 acre-feet, and collects water from a drainage area of 5 square miles. Completed in 1996, the structure is 30 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 06/17/2021.
At 52 feet, this dam is taller than 93% of dams nationwide.
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Location
| State | Nebraska |
| County | Otoe |
| Nearest City | Unadilla |
| River/Stream | Silver Creek |
| Coordinates | 40.63413, -96.41430 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 52 ft |
| Dam Height | 42 ft |
| Dam Length | 1,280 ft |
| Year Completed | 1996 (30 years old) |
Storage & Hydraulics
| NID Storage | 1,637 acre-ft |
| Max Storage | 1,637 acre-ft |
| Normal Storage | 237 acre-ft |
| Surface Area | 44 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 4,123 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/17/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02455 |
| Federal ID | NE02455 |
| More Info | State Dam Safety Program |