Lake Marie
Key Takeaway
Lake Marie is classified as high hazard in California. It was completed in 1908 and is 118 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 | 60 ft (taller than 67.2% in CA) |
| Dam Length | 454 ft |
| Dam Type | Earth |
| Max Storage | 170 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1908 (118 years old) |
| NID ID | CA00004 |
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
Department of State Hospitals-Napa
State Government
Nearby Dams
Lake Camille
Napa, CA
High Hazard 30 ftB. J. Robinson
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High Hazard 46 ftGreen Valley Lake
Solano, CA
High Hazard 40 ftLake Frey
Solano, CA
High Hazard 83 ftJameson Vineyards
Napa, CA
Significant Hazard 41 ftLake Madigan
Solano, CA
High Hazard 89 ftLynch Canyon
Solano, CA
High Hazard 21 ftTerminal
Solano, CA
Low Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Lake Marie?
Lake Marie 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 Marie?
Lake Marie is owned by Department of State Hospitals-Napa (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Marie built?
Lake Marie was completed in 1908, making it 118 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 Marie?
Lake Marie 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 Lake Marie?
Lake Marie has a dam height of 60 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 Marie last inspected?
Lake Marie was last inspected on August 5, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.