Stone Canyon
Key Takeaway
Stone Canyon is classified as high hazard in California. It was completed in 1924 and is 102 years old. Its primary use is water supply. 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 | 188 ft (taller than 93.9% in CA) |
| Dam Length | 1,150 ft |
| Dam Type | Earth |
| Max Storage | 10.4K acre-ft |
| Surface Area | 138 acres |
| Drainage Area | 1 sq mi |
| Year Completed | 1924 (102 years old) |
| NID ID | CA00083 |
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
City of Los Angeles Department of Water And Power
Local Government
Nearby Dams
Upper Stone Canyon
Los Angeles, CA
Low Hazard 111 ftLower Franklin No. 2
Los Angeles, CA
Low Hazard 49 ftLower Franklin
Los Angeles, CA
High Hazard 103 ftUpper Franklin Dam
Los Angeles, CA
Significant Hazard 40 ftGreystone Reservoir
Los Angeles, CA
High Hazard 75 ftSepulveda Dam
Los Angeles, CA
High Hazard 57 ftEncino
Los Angeles, CA
High Hazard 168 ftRiviera Reservoir
Los Angeles, CA
High Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Stone Canyon?
Stone Canyon 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 Stone Canyon?
Stone Canyon is owned by City of Los Angeles Department of Water And Power (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Stone Canyon built?
Stone Canyon was completed in 1924, making it 102 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 Stone Canyon?
Stone Canyon serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Stone Canyon?
Stone Canyon has a dam height of 188 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 Stone Canyon last inspected?
Stone Canyon was last inspected on September 1, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.