Alessandro
Key Takeaway
Alessandro is classified as high hazard in California. It was completed in 1956 and is 70 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 | 66 ft (taller than 71.1% in CA) |
| Dam Length | 470 ft |
| Dam Type | Earth |
| Max Storage | 370 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 5 sq mi |
| Year Completed | 1956 (70 years old) |
| NID ID | CA00798 |
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
Riverside County Flood Control and Water Conservation District
Local Government
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Significant Hazard 48 ftFrequently Asked Questions
What is the hazard classification of Alessandro?
Alessandro 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 Alessandro?
Alessandro is owned by Riverside County Flood Control and Water Conservation District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Alessandro built?
Alessandro 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 Alessandro?
Alessandro 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 Alessandro?
Alessandro has a dam height of 66 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 Alessandro last inspected?
Alessandro was last inspected on March 9, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.