Wise Forebay
Key Takeaway
Wise Forebay is classified as high hazard in California. It was completed in 1913 and is 113 years old. Its primary use is hydroelectric. 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 | 20 ft (taller than 15.3% in CA) |
| Dam Length | 1,741 ft |
| Dam Type | Earth |
| Max Storage | 32 acre-ft |
| Normal Storage | 32 acre-ft |
| Surface Area | 4 acres |
| Max Discharge | 100 cfs |
| Year Completed | 1913 (113 years old) |
| NID ID | CA01593 |
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
Pacific Gas and Electric Company
Private
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Significant Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Wise Forebay?
Wise Forebay 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 Wise Forebay?
Wise Forebay is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wise Forebay built?
Wise Forebay was completed in 1913, making it 113 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 Wise Forebay?
Wise Forebay serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Wise Forebay?
Wise Forebay has a dam height of 20 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 Wise Forebay last inspected?
Wise Forebay was last inspected on August 8, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.