Quarry Pits
Key Takeaway
Quarry Pits is classified as high hazard in California. It was completed in 1997 and is 29 years old. Its primary use is tailings. 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 | 26 ft (taller than 24.8% in CA) |
| Dam Length | 9,150 ft |
| Dam Type | Earth |
| Max Storage | 3.4K acre-ft |
| Surface Area | 330 acres |
| Drainage Area | 2 sq mi |
| Year Completed | 1997 (29 years old) |
| NID ID | CA01422 |
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
Alameda County Water District
Local Government
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High Hazard 55 ftFrequently Asked Questions
What is the hazard classification of Quarry Pits?
Quarry Pits 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 Quarry Pits?
Quarry Pits is owned by Alameda County Water District (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Quarry Pits built?
Quarry Pits was completed in 1997, making it 29 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 Quarry Pits?
Quarry Pits serves the following purposes: Tailings, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Quarry Pits?
Quarry Pits has a dam height of 26 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 Quarry Pits last inspected?
Quarry Pits was last inspected on October 25, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.