Upper Little Nemaha 50
Upper Little Nemaha 50 is an earth dam located in Otoe County, Nebraska, built in 2001. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Little Nemaha 50
The primary purpose of Upper Little Nemaha 50 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 Wolf Creek near Brock.
The dam stands 49 feet tall and stretches 1,100 feet across, creates a reservoir covering 31 acres, has a maximum storage capacity of 490 acre-feet, and collects water from a drainage area of 3 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 04/17/2023.
At 49 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Nebraska |
| County | Otoe |
| Nearest City | Brock |
| River/Stream | Wolf Creek |
| Coordinates | 40.75779, -96.28289 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 49 ft |
| Dam Height | 43 ft |
| Dam Length | 1,100 ft |
| Year Completed | 2001 (25 years old) |
Storage & Hydraulics
| NID Storage | 490 acre-ft |
| Max Storage | 490 acre-ft |
| Normal Storage | 173 acre-ft |
| Surface Area | 31 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,491 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/17/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02610 |
| Federal ID | NE02610 |
| More Info | State Dam Safety Program |