Mabey Canyon
Key Takeaway
Mabey Canyon is classified as high hazard in California. It was completed in 1974 and is 52 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 | 46 ft (taller than 55.4% in CA) |
| Dam Length | 520 ft |
| Dam Type | Earth |
| Max Storage | 68 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1974 (52 years old) |
| NID ID | CA01103 |
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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High Hazard 118 ftFrequently Asked Questions
What is the hazard classification of Mabey Canyon?
Mabey Canyon 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 Mabey Canyon?
Mabey Canyon 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 Mabey Canyon built?
Mabey Canyon was completed in 1974, making it 52 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 Mabey Canyon?
Mabey Canyon 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 Mabey Canyon?
Mabey Canyon has a dam height of 46 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 Mabey Canyon last inspected?
Mabey Canyon was last inspected on March 10, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.