Potrero
Key Takeaway
Potrero is classified as high hazard in California. It was completed in 1967 and is 59 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 | 40 ft (taller than 46.3% in CA) |
| Dam Length | 730 ft |
| Dam Type | Gravity |
| Max Storage | 1.6K acre-ft |
| Surface Area | 95 acres |
| Drainage Area | 29 sq mi |
| Year Completed | 1967 (59 years old) |
| NID ID | CA00743 |
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
Westlake Lake Management Association
Private
Nearby Dams
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Low Hazard 19 ftLang Creek Detention Basin
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High Hazard 67 ftMalibou Lake Club
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High Hazard 44 ftCentury
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Significant Hazard 44 ftFrequently Asked Questions
What is the hazard classification of Potrero?
Potrero 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 Potrero?
Potrero is owned by Westlake Lake Management Association (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Potrero built?
Potrero was completed in 1967, making it 59 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 Potrero?
Potrero serves the following purposes: Other, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Potrero?
Potrero has a dam height of 40 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 Potrero last inspected?
Potrero was last inspected on April 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.