Upper Little Nemaha 21
Key Takeaway
Upper Little Nemaha 21 is classified as high hazard in Nebraska. It was completed in 1998 and is 28 years old. Its primary use is flood risk reduction. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 51 ft (taller than 96.8% in NE) |
| Dam Length | 2,400 ft |
| Dam Type | Earth |
| Max Storage | 2.4K acre-ft |
| Normal Storage | 267 acre-ft |
| Surface Area | 40 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 15,225 cfs |
| Year Completed | 1998 (28 years old) |
| NID ID | NE02518 |
Safety Information
Loss of human life is likely if the dam fails.
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
Wiedeman Dam
Lancaster, NE
Low Hazard 18 ftUpper Little Nemaha 23
Lancaster, NE
Significant Hazard 51 ftKuhn Dam
Lancaster, NE
Low Hazard 18 ftUpper Salt Creek 8-B
Lancaster, NE
Low Hazard 27 ftUpper Salt Creek 8-A
Lancaster, NE
Low Hazard 26 ftStevens Creek A5-1
Lancaster, NE
Low Hazard 27 ftUpper Little Nemaha 25
Lancaster, NE
Low Hazard 44 ftStevens Creek A2-1
Lancaster, NE
High Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Upper Little Nemaha 21?
Upper Little Nemaha 21 is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Upper Little Nemaha 21?
Upper Little Nemaha 21 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 Little Nemaha 21 built?
Upper Little Nemaha 21 was completed in 1998, making it 28 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 Little Nemaha 21?
Upper Little Nemaha 21 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 Little Nemaha 21?
Upper Little Nemaha 21 has a dam height of 51 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 Little Nemaha 21 last inspected?
Upper Little Nemaha 21 was last inspected on June 27, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.