Number 7
Key Takeaway
Number 7 is classified as high hazard in Arizona. Its primary use is tailings. 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 | 189 ft (taller than 94.1% in AZ) |
| Dam Length | 15,441 ft |
| Dam Type | Earth |
| Max Storage | 306.0K acre-ft |
| NID ID | AZ30037 |
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
ASARCO MISSION
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Number 7?
Number 7 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 Number 7?
Number 7 is owned by ASARCO MISSION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
What is the primary purpose of Number 7?
Number 7 serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Number 7?
Number 7 has a dam height of 189 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.