Adelaide
Key Takeaway
Adelaide is classified as high hazard in Wyoming. It was completed in 1990 and is 36 years old. Its primary use is irrigation. 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 | 74 ft (taller than 97% in WY) |
| Dam Length | 805 ft |
| Dam Type | Earth |
| Max Storage | 5.8K acre-ft |
| Normal Storage | 4.8K acre-ft |
| Surface Area | 145 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 5,431 cfs |
| Year Completed | 1990 (36 years old) |
| NID ID | WY01099 |
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
SHELL VALLEY WATERSHED IMPROVEMENT DIST.
Private
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High Hazard 38 ftFrequently Asked Questions
What is the hazard classification of Adelaide?
Adelaide 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 Adelaide?
Adelaide is owned by SHELL VALLEY WATERSHED IMPROVEMENT DIST. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Adelaide built?
Adelaide was completed in 1990, making it 36 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 Adelaide?
Adelaide serves the following purposes: Irrigation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Adelaide?
Adelaide has a dam height of 74 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 Adelaide last inspected?
Adelaide was last inspected on July 13, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.