Gray Reef
Key Takeaway
Gray Reef is classified as low hazard in Wyoming. It was completed in 1961 and is 65 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 38 ft (taller than 84.6% in WY) |
| Dam Length | 650 ft |
| Dam Type | Earth |
| Max Storage | 1.8K acre-ft |
| Normal Storage | 1.8K acre-ft |
| Surface Area | 182 acres |
| Drainage Area | 11,000 sq mi |
| Max Discharge | 20,700 cfs |
| Year Completed | 1961 (65 years old) |
| NID ID | WY01292 |
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
RECLAMATION
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Gray Reef?
Gray Reef 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 Gray Reef?
Gray Reef is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gray Reef built?
Gray Reef was completed in 1961, making it 65 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 Gray Reef?
Gray Reef 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 Gray Reef?
Gray Reef has a dam height of 38 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.