Upper Big Nemaha 9-b
Upper Big Nemaha 9-b is an earth dam located in Gage County, Nebraska, built in 1991. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Big Nemaha 9-b
Upper Big Nemaha 9-b is a dam in Gage, Nebraska. The dam is owned by Nemaha Natural Resources District (local government). It impounds the Mid Br Big Nemaha River near Adams.
The dam stands 41 feet tall and stretches 1,230 feet across, creates a reservoir covering 58 acres, has a maximum storage capacity of 1,789 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1991, the structure is 35 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 05/07/2020.
At 41 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Nebraska |
| County | Gage |
| Nearest City | Adams |
| River/Stream | Mid Br Big Nemaha River |
| Coordinates | 40.51656, -96.55425 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 36 ft |
| Dam Length | 1,230 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 1,789 acre-ft |
| Max Storage | 1,789 acre-ft |
| Normal Storage | 327 acre-ft |
| Surface Area | 58 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 2,581 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/07/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE02375 |
| Federal ID | NE02375 |
| More Info | State Dam Safety Program |