Upper Van Tassell
Key Takeaway
Upper Van Tassell is classified as high hazard in Wyoming. It was completed in 1932 and is 94 years old. Its primary use is water supply. 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 | 95 ft (taller than 98.2% in WY) |
| Dam Length | 680 ft |
| Dam Type | Earth |
| Max Storage | 3.8K acre-ft |
| Normal Storage | 2.7K acre-ft |
| Surface Area | 94 acres |
| Drainage Area | 19 sq mi |
| Max Discharge | 21,400 cfs |
| Year Completed | 1932 (94 years old) |
| NID ID | WY00007 |
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
CITY OF CHEYENNE-BOPU
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Upper Van Tassell?
Upper Van Tassell 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 Upper Van Tassell?
Upper Van Tassell is owned by CITY OF CHEYENNE-BOPU (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Van Tassell built?
Upper Van Tassell was completed in 1932, making it 94 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 Upper Van Tassell?
Upper Van Tassell serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Van Tassell?
Upper Van Tassell has a dam height of 95 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 Upper Van Tassell last inspected?
Upper Van Tassell was last inspected on April 28, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.