Upper Big Nemaha 27-R
Key Takeaway
Upper Big Nemaha 27-R is classified as significant hazard in Nebraska. It was completed in 1986 and is 40 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 66.9% in NE) |
| Dam Length | 895 ft |
| Dam Type | Earth |
| Max Storage | 1.5K acre-ft |
| Normal Storage | 279 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 539 cfs |
| Year Completed | 1986 (40 years old) |
| NID ID | NE02212 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Nemaha Natural Resources District
Local Government
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Upper Big Nemaha 27-R?
Upper Big Nemaha 27-R is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Upper Big Nemaha 27-R?
Upper Big Nemaha 27-R is owned by Nemaha Natural Resources District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Big Nemaha 27-R built?
Upper Big Nemaha 27-R was completed in 1986, making it 40 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Upper Big Nemaha 27-R?
Upper Big Nemaha 27-R serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Big Nemaha 27-R?
Upper Big Nemaha 27-R has a dam height of 30 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Upper Big Nemaha 27-R last inspected?
Upper Big Nemaha 27-R was last inspected on May 5, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.