Granite Basin
Key Takeaway
Granite Basin is classified as high hazard in Arizona. It was completed in 1939 and is 87 years old. Its primary use is recreation. 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 | 27 ft (taller than 47.2% in AZ) |
| Dam Length | 438 ft |
| Dam Type | Concrete |
| Max Storage | 90 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 5,300 cfs |
| Year Completed | 1939 (87 years old) |
| NID ID | AZ10143 |
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
USDA FS
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Granite Basin?
Granite Basin 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 Granite Basin?
Granite Basin is owned by USDA FS (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Granite Basin built?
Granite Basin was completed in 1939, making it 87 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 Granite Basin?
Granite Basin serves the following purposes: Recreation, 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 Granite Basin?
Granite Basin has a dam height of 27 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 Granite Basin last inspected?
Granite Basin was last inspected on August 19, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.