Beardsley Afterbay
Key Takeaway
Beardsley Afterbay is classified as low hazard in California. It was completed in 1958 and is 68 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 33 ft (taller than 35.9% in CA) |
| Dam Length | 240 ft |
| Dam Type | Rockfill |
| Max Storage | 355 acre-ft |
| Normal Storage | 320 acre-ft |
| Surface Area | 26 acres |
| Max Discharge | 1 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | CA00266 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
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 Afterbay?
Beardsley Afterbay is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Beardsley Afterbay?
Beardsley Afterbay 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 Afterbay built?
Beardsley Afterbay 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 Beardsley Afterbay?
Beardsley Afterbay 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 Beardsley Afterbay?
Beardsley Afterbay has a dam height of 33 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 Afterbay last inspected?
Beardsley Afterbay was last inspected on July 25, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.