Upper Big Nemaha 25-c
Upper Big Nemaha 25-c is an earth dam located in Gage County, Nebraska, built in 1974. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Upper Big Nemaha 25-c
The primary purpose of Upper Big Nemaha 25-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 Jakes Creek near Railroad.
The dam stands 50 feet tall and stretches 1,500 feet across, creates a reservoir covering 79 acres, has a maximum storage capacity of 3,690 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1974, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 05/30/2024.
At 50 feet, this dam is taller than 93% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Nebraska dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Nebraska |
| County | Gage |
| Nearest City | Railroad |
| River/Stream | Jakes Creek |
| Coordinates | 40.44800, -96.53130 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 42 ft |
| Dam Length | 1,500 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 3,690 acre-ft |
| Max Storage | 3,690 acre-ft |
| Normal Storage | 487 acre-ft |
| Surface Area | 79 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 16,281 cfs |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Nemaha Natural Resources District |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/30/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NE00914 |
| Federal ID | NE00914 |
| More Info | State Dam Safety Program |