Upper Big Nemaha 18-b
Upper Big Nemaha 18-b is an earth dam located in Gage County, Nebraska, built in 1980. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Upper Big Nemaha 18-b
The primary purpose of Upper Big Nemaha 18-b 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-hooker Creek near Sterling.
The dam stands 53 feet tall and stretches 1,410 feet across, creates a reservoir covering 99 acres, has a maximum storage capacity of 3,768 acre-feet, and collects water from a drainage area of 11 square miles. Completed in 1980, the structure is 46 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 10/15/2020.
At 53 feet, this dam is taller than 94% of dams nationwide.
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Location
| State | Nebraska |
| County | Gage |
| Nearest City | Sterling |
| River/Stream | Tr-hooker Creek |
| Coordinates | 40.41810, -96.46699 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 53 ft |
| Dam Height | 48 ft |
| Dam Length | 1,410 ft |
| Year Completed | 1980 (46 years old) |
Storage & Hydraulics
| NID Storage | 3,768 acre-ft |
| Max Storage | 3,768 acre-ft |
| Normal Storage | 838 acre-ft |
| Surface Area | 99 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 4,791 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/15/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02143 |
| Federal ID | NE02143 |
| More Info | State Dam Safety Program |