Lake Eleanor
Key Takeaway
Lake Eleanor is classified as high hazard in California. It was completed in 1881 and is 145 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 | 37 ft (taller than 41.5% in CA) |
| Dam Length | 140 ft |
| Dam Type | Arch |
| Max Storage | 104 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1881 (145 years old) |
| NID ID | CA00737 |
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
Conejo Open Space Conservation Agency
Public Utility
Nearby Dams
Lake Sherwood
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High Hazard 45 ftWestlake Reservoir
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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 ftWood Ranch
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High Hazard 146 ftFrequently Asked Questions
What is the hazard classification of Lake Eleanor?
Lake Eleanor 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 Eleanor?
Lake Eleanor is owned by Conejo Open Space Conservation Agency (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Eleanor built?
Lake Eleanor was completed in 1881, making it 145 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 Eleanor?
Lake Eleanor serves the following purposes: Water Supply, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lake Eleanor?
Lake Eleanor has a dam height of 37 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 Eleanor last inspected?
Lake Eleanor was last inspected on April 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.