Upper Big Nemaha G-24 is an earth dam located in Gage County, Nebraska, built in 1982. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 30 ft30 ft tall and 668 ft long, taller than 68% 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 Big Nemaha G-24
Upper Big Nemaha G-24 is a dam in Gage, Nebraska. 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 30 feet tall and stretches 668 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 224 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1982, the structure is 44 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in 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 06/22/2021.
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Location
| State | Nebraska |
| County | Gage |
| Nearest City | Adams |
| River/Stream | Tr-mid Br Big Nemaha River |
| Coordinates | 40.50998, -96.56549 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 29 ft |
| Dam Length | 668 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 224 acre-ft |
| Max Storage | 224 acre-ft |
| Normal Storage | 71 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 192 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/22/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02144 |
| Federal ID | NE02144 |
| More Info | State Dam Safety Program |