Morris S. Jones
Key Takeaway
Morris S. Jones is classified as high hazard in California. It was completed in 1952 and is 74 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 | 49 ft (taller than 57.9% in CA) |
| Dam Length | 1,470 ft |
| Dam Type | Earth |
| Max Storage | 153 acre-ft |
| Surface Area | 6 acres |
| Year Completed | 1952 (74 years old) |
| NID ID | CA00154 |
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
Pasadena City Department Of Water and Power
Local Government
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High Hazard 82 ftFrequently Asked Questions
What is the hazard classification of Morris S. Jones?
Morris S. Jones 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 Morris S. Jones?
Morris S. Jones is owned by Pasadena City Department Of Water and Power (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Morris S. Jones built?
Morris S. Jones was completed in 1952, making it 74 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 Morris S. Jones?
Morris S. Jones 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 Morris S. Jones?
Morris S. Jones has a dam height of 49 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 Morris S. Jones last inspected?
Morris S. Jones was last inspected on January 19, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.