Oso Largo Dam
Key Takeaway
Oso Largo Dam is classified as low hazard in Arizona. It was completed in 1971 and is 55 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Length | 4,625 ft |
| Dam Type | Gravity |
| Max Storage | 617 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 241 acres |
| Drainage Area | 94 sq mi |
| Max Discharge | 5,442 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | AZ20020 |
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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High Hazard 45 ftFrequently Asked Questions
What is the hazard classification of Oso Largo Dam?
Oso Largo 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 Oso Largo Dam?
Oso Largo Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Oso Largo Dam built?
Oso Largo Dam was completed in 1971, making it 55 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 Oso Largo Dam?
Oso Largo 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 Oso Largo Dam last inspected?
Oso Largo Dam was last inspected on August 20, 2010. Inspection dates indicate when a formal review occurred, not the results of that inspection.