Willoughby Dam
Key Takeaway
Willoughby Dam is classified as significant hazard in Nebraska. It was completed in 1963 and is 63 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 | 27 ft (taller than 55% in NE) |
| Dam Length | 637 ft |
| Dam Type | Earth |
| Max Storage | 263 acre-ft |
| Normal Storage | 58 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2,020 cfs |
| Year Completed | 1963 (63 years old) |
| NID ID | NE00603 |
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
Emerald Ranch LLC
Private
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Willoughby Dam?
Willoughby Dam 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 Willoughby Dam?
Willoughby Dam is owned by Emerald Ranch LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willoughby Dam built?
Willoughby Dam was completed in 1963, making it 63 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 Willoughby Dam?
Willoughby Dam 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 Willoughby Dam?
Willoughby Dam has a dam height of 27 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 Willoughby Dam last inspected?
Willoughby Dam was last inspected on March 24, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.