Mallacomes
Key Takeaway
Mallacomes is classified as high hazard in California. It was completed in 1951 and is 75 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 | 57 ft (taller than 65.7% in CA) |
| Dam Length | 940 ft |
| Dam Type | Earth |
| Max Storage | 225 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1951 (75 years old) |
| NID ID | CA00591 |
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
Knights Valley California, LLC
Private
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What is the hazard classification of Mallacomes?
Mallacomes 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 Mallacomes?
Mallacomes is owned by Knights Valley California, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mallacomes built?
Mallacomes was completed in 1951, making it 75 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 Mallacomes?
Mallacomes 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 Mallacomes?
Mallacomes has a dam height of 57 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 Mallacomes last inspected?
Mallacomes was last inspected on August 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.