Headgate Rock
Key Takeaway
Headgate Rock is classified as high hazard in Arizona. It was completed in 1941 and is 85 years old. Its primary use is irrigation. 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 Length | 1,975 ft |
| Dam Type | Earth |
| Normal Storage | 7.0K acre-ft |
| Year Completed | 1941 (85 years old) |
| NID ID | AZ10437 |
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
BIA
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Headgate Rock?
Headgate Rock 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 Headgate Rock?
Headgate Rock is owned by BIA (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Headgate Rock built?
Headgate Rock was completed in 1941, making it 85 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 Headgate Rock?
Headgate Rock serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.