Beardsley
Key Takeaway
Beardsley is classified as high hazard in California. It was completed in 1957 and is 69 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 | 278 ft (taller than 98% in CA) |
| Dam Length | 1,000 ft |
| Dam Type | Earth |
| Max Storage | 97.8K acre-ft |
| Normal Storage | 97.5K acre-ft |
| Surface Area | 720 acres |
| Drainage Area | 310 sq mi |
| Max Discharge | 90,000 cfs |
| Year Completed | 1957 (69 years old) |
| NID ID | CA00263 |
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
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Beardsley?
Beardsley 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 Beardsley?
Beardsley 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 Beardsley built?
Beardsley was completed in 1957, making it 69 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 Beardsley?
Beardsley 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 Beardsley?
Beardsley has a dam height of 278 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 Beardsley last inspected?
Beardsley was last inspected on July 25, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.