Dyer
Key Takeaway
Dyer is classified as high hazard in California. It was completed in 2011 and is 15 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 | 30 ft (taller than 30.4% in CA) |
| Dam Length | 1,850 ft |
| Dam Type | Earth |
| Max Storage | 525 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 2011 (15 years old) |
| NID ID | CA01491 |
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
California Department of Water Resources
State Government
Nearby Dams
Bethany Forebay
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High Hazard 95 ftPatterson
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High Hazard 231 ftClifton Court Forebay
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Low Hazard 34 ftMarsh Creek
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High Hazard 59 ftMaria
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High Hazard 48 ftDel Valle
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High Hazard 222 ftFrequently Asked Questions
What is the hazard classification of Dyer?
Dyer 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 Dyer?
Dyer is owned by California Department of Water Resources (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Dyer built?
Dyer was completed in 2011, making it 15 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 Dyer?
Dyer 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 Dyer?
Dyer has a dam height of 30 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 Dyer last inspected?
Dyer was last inspected on November 15, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.