North Fork Big Nemaha 23-d
North Fork Big Nemaha 23-d is an earth dam located in Lancaster County, Nebraska, built in 1976. It carries a Significant hazard potential classification and has a poor condition assessment.
About North Fork Big Nemaha 23-d
The primary purpose of North Fork Big Nemaha 23-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-n Fk Big Nemaha River near Sterling.
The dam stands 30 feet tall and stretches 970 feet across, creates a reservoir covering 26 acres, has a maximum storage capacity of 580 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1976, the structure is 50 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/05/2022.
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Location
| State | Nebraska |
| County | Lancaster |
| Nearest City | Sterling |
| River/Stream | Tr-n Fk Big Nemaha River |
| Coordinates | 40.56185, -96.54342 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 970 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 580 acre-ft |
| Max Storage | 580 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 26 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 430 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/05/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NE01580 |
| Federal ID | NE01580 |
| More Info | State Dam Safety Program |