Trampas Canyon
Key Takeaway
Trampas Canyon is classified as high hazard in California. It was completed in 1975 and is 51 years old. Its primary use is other. 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 | 229 ft (taller than 96.2% in CA) |
| Dam Length | 1,300 ft |
| Dam Type | Earth |
| Max Storage | 5.3K acre-ft |
| Surface Area | 135 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,450 cfs |
| Year Completed | 1975 (51 years old) |
| NID ID | CA01123 |
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
Santa Margarita Water District
Public Utility
Nearby Dams
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High Hazard 113 ftFrequently Asked Questions
What is the hazard classification of Trampas Canyon?
Trampas 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 Trampas Canyon?
Trampas Canyon is owned by Santa Margarita Water District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Trampas Canyon built?
Trampas Canyon was completed in 1975, making it 51 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 Trampas Canyon?
Trampas Canyon serves the following purposes: Other, Tailings, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Trampas Canyon?
Trampas Canyon has a dam height of 229 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 Trampas Canyon last inspected?
Trampas Canyon was last inspected on October 27, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.