Lake Frey
Key Takeaway
Lake Frey is classified as high hazard in California. It was completed in 1894 and is 132 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 | 83 ft (taller than 77.5% in CA) |
| Dam Length | 575 ft |
| Dam Type | Earth |
| Max Storage | 1.0K acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,021 cfs |
| Year Completed | 1894 (132 years old) |
| NID ID | CA00142 |
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
City of Vallejo
Local Government
Nearby Dams
Lake Madigan
Solano, CA
High Hazard 89 ftGreen Valley Lake
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High Hazard 40 ftB. J. Robinson
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High Hazard 46 ftMunicipal
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High Hazard 56 ftLake Marie
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High Hazard 60 ftLake Camille
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High Hazard 30 ftLake Leticia
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High Hazard 49 ftLake William
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High Hazard 66 ftFrequently Asked Questions
What is the hazard classification of Lake Frey?
Lake Frey 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 Lake Frey?
Lake Frey is owned by City of Vallejo (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Frey built?
Lake Frey was completed in 1894, making it 132 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 Lake Frey?
Lake Frey serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Frey?
Lake Frey has a dam height of 83 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 Lake Frey last inspected?
Lake Frey was last inspected on August 31, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.