Chesley-Wamslee
Key Takeaway
Chesley-Wamslee is classified as high hazard in Arizona. It was completed in 1975 and is 51 years old. Its primary use is flood risk reduction. 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 | 42 ft (taller than 71.3% in AZ) |
| Dam Length | 1,760 ft |
| Dam Type | Earth |
| Max Storage | 2.2K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 73 acres |
| Drainage Area | 8 sq mi |
| Year Completed | 1975 (51 years old) |
| NID ID | AZ00161 |
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
ARIZONA STATE LAND DEPARTMENT;GRAHAM CANAL CO.
Private
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What is the hazard classification of Chesley-Wamslee?
Chesley-Wamslee 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 Chesley-Wamslee?
Chesley-Wamslee is owned by ARIZONA STATE LAND DEPARTMENT;GRAHAM CANAL CO. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chesley-Wamslee built?
Chesley-Wamslee was completed in 1975, making it 51 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 Chesley-Wamslee?
Chesley-Wamslee serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Chesley-Wamslee?
Chesley-Wamslee has a dam height of 42 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 Chesley-Wamslee last inspected?
Chesley-Wamslee was last inspected on February 25, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.