Yorba
Key Takeaway
Yorba is classified as high hazard in California. It was completed in 1907 and is 119 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 | 45 ft (taller than 54% in CA) |
| Dam Length | 920 ft |
| Dam Type | Earth |
| Max Storage | 1.2K acre-ft |
| Surface Area | 87 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1907 (119 years old) |
| NID ID | CA00831 |
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
County of Orange
Local Government
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High Hazard 46 ftOrange County Reservoir
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High Hazard 103 ftFrequently Asked Questions
What is the hazard classification of Yorba?
Yorba 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 Yorba?
Yorba is owned by County of Orange (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Yorba built?
Yorba was completed in 1907, making it 119 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 Yorba?
Yorba 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 Yorba?
Yorba has a dam height of 45 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 Yorba last inspected?
Yorba was last inspected on February 23, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.