Cook Reservoir
Key Takeaway
Cook Reservoir is classified as high hazard in Arizona. It was completed in 1940 and is 86 years old. Its primary use is water supply. 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 | 18 ft (taller than 25.1% in AZ) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 59 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1940 (86 years old) |
| NID ID | AZ00245 |
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
EASTERN ARIZONA COLLEGE
State Government
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What is the hazard classification of Cook Reservoir?
Cook Reservoir 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 Cook Reservoir?
Cook Reservoir is owned by EASTERN ARIZONA COLLEGE (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cook Reservoir built?
Cook Reservoir was completed in 1940, making it 86 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 Cook Reservoir?
Cook Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Cook Reservoir?
Cook Reservoir has a dam height of 18 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 Cook Reservoir last inspected?
Cook Reservoir was last inspected on January 14, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.