Granite Reef Diversion
Key Takeaway
Granite Reef Diversion is classified as low hazard in Arizona. It was completed in 1907 and is 119 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 29 ft (taller than 50.2% in AZ) |
| Dam Length | 1,128 ft |
| Dam Type | Concrete |
| Max Storage | 700 acre-ft |
| Normal Storage | 250 acre-ft |
| Drainage Area | 13,000 sq mi |
| Max Discharge | 165,000 cfs |
| Year Completed | 1907 (119 years old) |
| NID ID | AZ10316 |
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
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High Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Granite Reef Diversion?
Granite Reef Diversion 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 Granite Reef Diversion?
Granite Reef Diversion is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Granite Reef Diversion built?
Granite Reef Diversion was completed in 1907, making it 119 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 Reef Diversion?
Granite Reef Diversion 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 Granite Reef Diversion?
Granite Reef Diversion has a dam height of 29 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.