Middle Big Nemaha 18
Key Takeaway
Middle Big Nemaha 18 is classified as significant hazard in Nebraska. It was completed in 2003 and is 23 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 | 50 ft (taller than 96.4% in NE) |
| Dam Length | 844 ft |
| Dam Type | Earth |
| Max Storage | 1.1K acre-ft |
| Normal Storage | 134 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 4,334 cfs |
| Year Completed | 2003 (23 years old) |
| NID ID | NE02664 |
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 48 ftFrequently Asked Questions
What is the hazard classification of Middle Big Nemaha 18?
Middle Big Nemaha 18 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 Middle Big Nemaha 18?
Middle Big Nemaha 18 is owned by Nemaha Natural Resources District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Middle Big Nemaha 18 built?
Middle Big Nemaha 18 was completed in 2003, making it 23 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 Middle Big Nemaha 18?
Middle Big Nemaha 18 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 Middle Big Nemaha 18?
Middle Big Nemaha 18 has a dam height of 50 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 Middle Big Nemaha 18 last inspected?
Middle Big Nemaha 18 was last inspected on April 4, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.