Swan
Key Takeaway
Swan is classified as significant hazard in Wyoming. It was completed in 1907 and is 119 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 39.5% in WY) |
| Dam Length | 1,450 ft |
| Dam Type | Earth |
| Max Storage | 356 acre-ft |
| Normal Storage | 247 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 72 cfs |
| Year Completed | 1907 (119 years old) |
| NID ID | WY00009 |
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
SWAN RANCH, LLC
Private
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Significant Hazard 28 ftFrequently Asked Questions
What is the hazard classification of Swan?
Swan 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 Swan?
Swan is owned by SWAN RANCH, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Swan built?
Swan was completed in 1907, making it 119 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 Swan?
Swan 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 Swan?
Swan has a dam height of 25 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 Swan last inspected?
Swan was last inspected on August 13, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.