Thunder Basin No 9
Key Takeaway
Thunder Basin No 9 is classified as low hazard in Wyoming. It was completed in 1937 and is 89 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 21 ft (taller than 26.6% in WY) |
| Dam Length | 420 ft |
| Dam Type | Earth |
| Max Storage | 53 acre-ft |
| Normal Storage | 53 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 2 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | WY01923 |
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
USDA FS
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Thunder Basin No 9?
Thunder Basin No 9 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 Thunder Basin No 9?
Thunder Basin No 9 is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thunder Basin No 9 built?
Thunder Basin No 9 was completed in 1937, making it 89 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 Thunder Basin No 9?
Thunder Basin No 9 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Fish And Wildlife Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Thunder Basin No 9?
Thunder Basin No 9 has a dam height of 21 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 Thunder Basin No 9 last inspected?
Thunder Basin No 9 was last inspected on May 26, 2011. Inspection dates indicate when a formal review occurred, not the results of that inspection.