Upland Basin
Key Takeaway
Upland Basin is classified as high hazard in California. It was completed in 2008 and is 18 years old. Its primary use is flood risk reduction. 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 | 20 ft (taller than 15.3% in CA) |
| Dam Length | 2,275 ft |
| Dam Type | Earth |
| Max Storage | 362 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 0 sq mi |
| Year Completed | 2008 (18 years old) |
| NID ID | CA01502 |
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 Upland
Local Government
Nearby Dams
Thompson Creek
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High Hazard 66 ftLive Oak
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High Hazard 76 ftSan Antonio Dam
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High Hazard 160 ftLive Oak Reservoir
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High Hazard 105 ftCucamonga Creek Debris Basin
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High Hazard 60 ftWeymouth Memorial Reservoir
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High Hazard 18 ftPuddingstone Diversion
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High Hazard 34 ftSan Dimas
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High Hazard 131 ftFrequently Asked Questions
What is the hazard classification of Upland Basin?
Upland 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 Upland Basin?
Upland Basin is owned by City of Upland (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upland Basin built?
Upland Basin was completed in 2008, making it 18 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 Upland Basin?
Upland Basin serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upland Basin?
Upland Basin has a dam height of 20 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 Upland Basin last inspected?
Upland Basin was last inspected on May 12, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.