Case
Key Takeaway
Case is classified as low hazard in Wyoming. It was completed in 1991 and is 35 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 30 ft (taller than 63.1% in WY) |
| Dam Length | 880 ft |
| Dam Type | Earth |
| Max Storage | 349 acre-ft |
| Normal Storage | 199 acre-ft |
| Surface Area | 29 acres |
| Drainage Area | 4,820 sq mi |
| Max Discharge | 17,640 cfs |
| Year Completed | 1991 (35 years old) |
| Year Modified | 1991 |
| NID ID | WY00786 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ROBINSON CANYON RANCH, LLC
Private
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Low Hazard 39 ftFrequently Asked Questions
What is the hazard classification of Case?
Case is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Case?
Case is owned by ROBINSON CANYON RANCH, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Case built?
Case was completed in 1991, making it 35 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 Case?
Case 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 Case?
Case has a dam height of 30 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 Case last inspected?
Case was last inspected on June 21, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.