Nicolaysen
Key Takeaway
Nicolaysen is classified as significant hazard in Wyoming. It was completed in 1899 and is 127 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 28.8% in WY) |
| Dam Length | 1,500 ft |
| Dam Type | Earth |
| Max Storage | 475 acre-ft |
| Normal Storage | 330 acre-ft |
| Surface Area | 30 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 3,120 cfs |
| Year Completed | 1899 (127 years old) |
| NID ID | WY00233 |
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
KRO VENTURES, LLC
Private
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High Hazard 64 ftFrequently Asked Questions
What is the hazard classification of Nicolaysen?
Nicolaysen 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 Nicolaysen?
Nicolaysen is owned by KRO VENTURES, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Nicolaysen built?
Nicolaysen was completed in 1899, making it 127 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 Nicolaysen?
Nicolaysen serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Nicolaysen?
Nicolaysen has a dam height of 22 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 Nicolaysen last inspected?
Nicolaysen was last inspected on May 18, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.