Middle Big Nemaha 12
Key Takeaway
Middle Big Nemaha 12 is classified as significant hazard in Nebraska. It was completed in 2000 and is 26 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 | 43 ft (taller than 93% in NE) |
| Dam Length | 1,534 ft |
| Dam Type | Earth |
| Max Storage | 2.0K acre-ft |
| Normal Storage | 190 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 6,010 cfs |
| Year Completed | 2000 (26 years old) |
| NID ID | NE02535 |
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
Nearby Dams
Middle Big Nemaha 88
Johnson, NE
Significant Hazard 46 ftUpper Big Nemaha J-36
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Low Hazard 33 ftUpper Big Nemaha J-37
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Significant Hazard 25 ftMiddle Big Nemaha 46
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Low Hazard 48 ftUpper Big Nemaha J-34
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Low Hazard 25 ftMeisinger Dam 3
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Low Hazard 34 ftMeisinger Dam 1
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Low Hazard 24 ftUpper Big Nemaha J-40
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Middle Big Nemaha 12?
Middle Big Nemaha 12 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 12?
Middle Big Nemaha 12 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 12 built?
Middle Big Nemaha 12 was completed in 2000, making it 26 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 12?
Middle Big Nemaha 12 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 12?
Middle Big Nemaha 12 has a dam height of 43 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 12 last inspected?
Middle Big Nemaha 12 was last inspected on April 4, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.