Upper Big Nemaha G-23 is an earth dam located in Gage County, Nebraska, built in 1967. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 600 ft long, taller than 62% 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-23
Upper Big Nemaha G-23 is a dam in Gage, Nebraska. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Tr-n Fk Big Nemaha River near Sterling.
The dam stands 28 feet tall and stretches 600 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 57 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 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 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 04/27/2022.
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Location
| State | Nebraska |
| County | Gage |
| Nearest City | Sterling |
| River/Stream | Tr-n Fk Big Nemaha River |
| Coordinates | 40.52288, -96.49301 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 600 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 57 acre-ft |
| Max Storage | 57 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 04/27/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01949 |
| Federal ID | NE01949 |
| More Info | State Dam Safety Program |