Arroyo Seco
Key Takeaway
Arroyo Seco is classified as high hazard in California. It was completed in 1957 and is 69 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 | 67 ft (taller than 71.5% in CA) |
| Dam Length | 1,175 ft |
| Dam Type | Earth |
| Max Storage | 2.4K acre-ft |
| Surface Area | 104 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1957 (69 years old) |
| NID ID | CA00613 |
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
Jackson Rancheria Development Corporation
Private
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High Hazard 58 ftFrequently Asked Questions
What is the hazard classification of Arroyo Seco?
Arroyo Seco 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 Arroyo Seco?
Arroyo Seco is owned by Jackson Rancheria Development Corporation (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Arroyo Seco built?
Arroyo Seco was completed in 1957, making it 69 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 Arroyo Seco?
Arroyo Seco serves the following purposes: Water Supply, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Arroyo Seco?
Arroyo Seco has a dam height of 67 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 Arroyo Seco last inspected?
Arroyo Seco was last inspected on January 11, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.