Roberts
Key Takeaway
Roberts is classified as high hazard in California. It was completed in 1905 and is 121 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 | 17 ft (taller than 11.1% in CA) |
| Dam Length | 700 ft |
| Dam Type | Earth |
| Max Storage | 5.5K acre-ft |
| Surface Area | 640 acres |
| Drainage Area | 23 sq mi |
| Year Completed | 1905 (121 years old) |
| NID ID | CA00485 |
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
Big Valley Mutual Water Company
Private
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Low Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Roberts?
Roberts 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 Roberts?
Roberts is owned by Big Valley Mutual Water Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Roberts built?
Roberts was completed in 1905, making it 121 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 Roberts?
Roberts serves the following purposes: Other, Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Roberts?
Roberts has a dam height of 17 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 Roberts last inspected?
Roberts was last inspected on April 26, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.