Cook No. 2
Key Takeaway
Cook No. 2 is classified as high hazard in California. It was completed in 1961 and is 65 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 | 35 ft (taller than 38.2% in CA) |
| Dam Length | 510 ft |
| Dam Type | Earth |
| Max Storage | 82 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 1961 (65 years old) |
| NID ID | CA01056 |
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
E & J Gallo Winery
Private
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Significant Hazard 26 ftFrequently Asked Questions
What is the hazard classification of Cook No. 2?
Cook No. 2 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 Cook No. 2?
Cook No. 2 is owned by E & J Gallo Winery (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cook No. 2 built?
Cook No. 2 was completed in 1961, making it 65 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 Cook No. 2?
Cook No. 2 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 Cook No. 2?
Cook No. 2 has a dam height of 35 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 Cook No. 2 last inspected?
Cook No. 2 was last inspected on August 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.