Upper Big Nemaha 14-c
Upper Big Nemaha 14-c is an earth dam located in Lancaster County, Nebraska, built in 1970. It carries a Low hazard potential classification and has a fair condition assessment.
About Upper Big Nemaha 14-c
The primary purpose of Upper Big Nemaha 14-c 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 Firth.
The dam stands 27 feet tall and stretches 689 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 229 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1970, 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 06/10/2021.
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Location
| State | Nebraska |
| County | Lancaster |
| Nearest City | Firth |
| River/Stream | Tr-mid Br Big Nemaha River |
| Coordinates | 40.55104, -96.68839 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 27 ft |
| Dam Height | 26 ft |
| Dam Length | 689 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 229 acre-ft |
| Max Storage | 229 acre-ft |
| Normal Storage | 26 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 513 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 06/10/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE00547 |
| Federal ID | NE00547 |
| More Info | State Dam Safety Program |