Tulloch
Key Takeaway
Tulloch is classified as high hazard in California. It was completed in 1958 and is 68 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 | 205 ft (taller than 94.9% in CA) |
| Dam Length | 1,914 ft |
| Dam Type | Concrete |
| Max Storage | 68.4K acre-ft |
| Normal Storage | 67.0K acre-ft |
| Surface Area | 1,260 acres |
| Drainage Area | 980 sq mi |
| Max Discharge | 13,900 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | CA00265 |
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
South San Joaquin Irrigation District
Public Utility
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Low Hazard 31 ftFrequently Asked Questions
What is the hazard classification of Tulloch?
Tulloch 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 Tulloch?
Tulloch is owned by South San Joaquin Irrigation District (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tulloch built?
Tulloch was completed in 1958, making it 68 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 Tulloch?
Tulloch serves the following purposes: Hydroelectric, Recreation, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tulloch?
Tulloch has a dam height of 205 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 Tulloch last inspected?
Tulloch was last inspected on July 26, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.