Middle Branch Big Nemaha 9-d is an earth dam located in Gage County, Nebraska, built in 1977. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 40 ft40 ft tall and 918 ft long, taller than 86% 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 Middle Branch Big Nemaha 9-d
The primary purpose of Middle Branch Big Nemaha 9-d 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-mid Br Big Nemaha River near Adams.
The dam stands 40 feet tall and stretches 918 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 725 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1977, the structure is 49 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 06/03/2020.
At 40 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | Nebraska |
| County | Gage |
| Nearest City | Adams |
| River/Stream | Tr-mid Br Big Nemaha River |
| Coordinates | 40.49787, -96.58318 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 35 ft |
| Dam Length | 918 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 725 acre-ft |
| Max Storage | 725 acre-ft |
| Normal Storage | 115 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1,606 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/03/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01558 |
| Federal ID | NE01558 |
| More Info | State Dam Safety Program |