Grant Morris
Key Takeaway
Grant Morris 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 | 44 ft (taller than 73.9% in AZ) |
| Dam Length | 488 ft |
| Dam Type | Earth |
| Max Storage | 196 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1975 (51 years old) |
| NID ID | AZ00159 |
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
GRAHAM CANAL CO.
Private
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What is the hazard classification of Grant Morris?
Grant Morris 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 Grant Morris?
Grant Morris is owned by GRAHAM CANAL CO. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grant Morris built?
Grant Morris 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 Grant Morris?
Grant Morris 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 Grant Morris?
Grant Morris has a dam height of 44 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 Grant Morris last inspected?
Grant Morris was last inspected on February 25, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.