Grayhorse Detention Dam
Key Takeaway
Grayhorse Detention Dam is classified as low hazard in Arizona. It was completed in 1956 and is 70 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Length | 603 ft |
| Dam Type | Gravity |
| Max Storage | 120 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 20 acres |
| Max Discharge | 890 cfs |
| Year Completed | 1956 (70 years old) |
| NID ID | AZ20012 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
DOI BLM
Federal Government
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Low HazardFrequently Asked Questions
What is the hazard classification of Grayhorse Detention Dam?
Grayhorse Detention Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Grayhorse Detention Dam?
Grayhorse Detention Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grayhorse Detention Dam built?
Grayhorse Detention Dam was completed in 1956, making it 70 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 Grayhorse Detention Dam?
Grayhorse Detention Dam 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.
When was Grayhorse Detention Dam last inspected?
Grayhorse Detention Dam was last inspected on August 12, 2015. Inspection dates indicate when a formal review occurred, not the results of that inspection.