Puddingstone
Key Takeaway
Puddingstone is classified as high hazard in California. It was completed in 1928 and is 98 years old. Its primary use is flood risk reduction. 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 | 147 ft (taller than 89.6% in CA) |
| Dam Length | 2,698 ft |
| Dam Type | Earth |
| Max Storage | 16.3K acre-ft |
| Surface Area | 490 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 28,970 cfs |
| Year Completed | 1928 (98 years old) |
| NID ID | CA00194 |
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
Los Angeles County Department Of Public Works
Local Government
Nearby Dams
Weymouth Memorial Reservoir
Los Angeles, CA
High Hazard 18 ftPuddingstone Diversion
Los Angeles, CA
High Hazard 34 ftMorgan Debris Basin
Los Angeles, CA
High Hazard 37 ftBig Dalton Debris Basin
Los Angeles, CA
High Hazard 59 ftSan Dimas
Los Angeles, CA
High Hazard 131 ftLittle Dalton Debris Basin
Los Angeles, CA
High Hazard 71 ftLive Oak Reservoir
Los Angeles, CA
High Hazard 105 ftLive Oak
Los Angeles, CA
High Hazard 76 ftFrequently Asked Questions
What is the hazard classification of Puddingstone?
Puddingstone 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 Puddingstone?
Puddingstone is owned by Los Angeles County Department Of Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Puddingstone built?
Puddingstone was completed in 1928, making it 98 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 Puddingstone?
Puddingstone serves the following purposes: Flood Risk Reduction, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Puddingstone?
Puddingstone has a dam height of 147 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 Puddingstone last inspected?
Puddingstone was last inspected on October 26, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.