Seven Oaks
Key Takeaway
Seven Oaks is classified as high hazard in California. It was completed in 1999 and is 27 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 | 550 ft (taller than 99.7% in CA) |
| Dam Length | 2,980 ft |
| Dam Type | Rockfill |
| Max Storage | 145.6K acre-ft |
| Surface Area | 780 acres |
| Drainage Area | 177 sq mi |
| Year Completed | 1999 (27 years old) |
| NID ID | CA01530 |
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 San Bernardino Department of Public Works
Local Government
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Low Hazard 56 ftFrequently Asked Questions
What is the hazard classification of Seven Oaks?
Seven Oaks 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 Seven Oaks?
Seven Oaks is owned by County of San Bernardino Department of Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Seven Oaks built?
Seven Oaks was completed in 1999, making it 27 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 Seven Oaks?
Seven Oaks 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 Seven Oaks?
Seven Oaks has a dam height of 550 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 Seven Oaks last inspected?
Seven Oaks was last inspected on August 23, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.