Walnut Canyon
Key Takeaway
Walnut Canyon is classified as high hazard in California. It was completed in 1968 and is 58 years old. Its primary use is water supply. 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 | 187 ft (taller than 93.9% in CA) |
| Dam Length | 930 ft |
| Dam Type | Earth |
| Max Storage | 2.6K acre-ft |
| Surface Area | 47 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1968 (58 years old) |
| NID ID | CA00869 |
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
City of Anaheim
Local Government
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High Hazard 32 ftFrequently Asked Questions
What is the hazard classification of Walnut Canyon?
Walnut 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 Walnut Canyon?
Walnut Canyon is owned by City of Anaheim (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Walnut Canyon built?
Walnut Canyon was completed in 1968, making it 58 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 Walnut Canyon?
Walnut Canyon serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Walnut Canyon?
Walnut Canyon has a dam height of 187 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 Walnut Canyon last inspected?
Walnut Canyon was last inspected on February 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.