Diamond Valley Lake
Key Takeaway
Diamond Valley Lake is classified as high hazard in California. It was completed in 2000 and is 26 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 | 284 ft (taller than 98.1% in CA) |
| Dam Length | 8,300 ft |
| Dam Type | Earth |
| Max Storage | 800.0K acre-ft |
| Surface Area | 4,860 acres |
| Year Completed | 2000 (26 years old) |
| NID ID | CA01410 |
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
Metropolitan Water District Of Southern California
Public Utility
Nearby Dams
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High Hazard 44 ftLakeview
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High Hazard 37 ftMetz Road Debris Basin
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High Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Diamond Valley Lake?
Diamond Valley Lake 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 Diamond Valley Lake?
Diamond Valley Lake is owned by Metropolitan Water District Of Southern California (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Diamond Valley Lake built?
Diamond Valley Lake was completed in 2000, making it 26 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 Diamond Valley Lake?
Diamond Valley Lake 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 Diamond Valley Lake?
Diamond Valley Lake has a dam height of 284 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 Diamond Valley Lake last inspected?
Diamond Valley Lake was last inspected on February 23, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.