Copper Basin
Key Takeaway
Copper Basin is classified as high hazard in California. It was completed in 1938 and is 88 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 | 184 ft (taller than 93.6% in CA) |
| Dam Length | 265 ft |
| Dam Type | Arch |
| Max Storage | 22.0K acre-ft |
| Surface Area | 427 acres |
| Drainage Area | 8 sq mi |
| Year Completed | 1938 (88 years old) |
| NID ID | CA00214 |
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
Metropolitan Water District Of Southern California
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Copper Basin?
Copper Basin 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 Copper Basin?
Copper Basin is owned by Metropolitan Water District Of Southern California (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Copper Basin built?
Copper Basin was completed in 1938, making it 88 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 Copper Basin?
Copper Basin 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 Copper Basin?
Copper Basin has a dam height of 184 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 Copper Basin last inspected?
Copper Basin was last inspected on October 28, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.