New Melones
Key Takeaway
New Melones is classified as high hazard in California. It was completed in 1979 and is 47 years old. Its primary use is hydroelectric. 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 | 578 ft (taller than 99.7% in CA) |
| Dam Length | 1,560 ft |
| Dam Type | Rockfill |
| Max Storage | 2.9M acre-ft |
| Normal Storage | 2.7M acre-ft |
| Surface Area | 13,450 acres |
| Drainage Area | 897 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1979 (47 years old) |
| NID ID | CA10246 |
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
RECLAMATION
Federal Government
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High Hazard 101 ftFrequently Asked Questions
What is the hazard classification of New Melones?
New Melones 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 New Melones?
New Melones is owned by RECLAMATION (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was New Melones built?
New Melones was completed in 1979, making it 47 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 New Melones?
New Melones serves the following purposes: Hydroelectric, Irrigation, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is New Melones?
New Melones has a dam height of 578 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 New Melones last inspected?
New Melones was last inspected on February 13, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.