Diederich Reservoir
Key Takeaway
Diederich Reservoir is classified as high hazard in California. It was completed in 1950 and is 76 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 | 60 ft (taller than 67.2% in CA) |
| Dam Length | 100 ft |
| Dam Type | Earth |
| Max Storage | 174 acre-ft |
| Surface Area | 7 acres |
| Year Completed | 1950 (76 years old) |
| NID ID | CA00064 |
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 Glendale
Local Government
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High Hazard 46 ftFrequently Asked Questions
What is the hazard classification of Diederich Reservoir?
Diederich Reservoir 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 Diederich Reservoir?
Diederich Reservoir is owned by City of Glendale (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Diederich Reservoir built?
Diederich Reservoir was completed in 1950, making it 76 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 Diederich Reservoir?
Diederich Reservoir 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 Diederich Reservoir?
Diederich Reservoir has a dam height of 60 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 Diederich Reservoir last inspected?
Diederich Reservoir was last inspected on August 24, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.