Large Upper Mtn Lake
Key Takeaway
Large Upper Mtn Lake is classified as high hazard in South Carolina. It was completed in 1945 and is 81 years old. Its primary use is recreation. 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 46.1% in SC) |
| Max Storage | 780 acre-ft |
| Normal Storage | 625 acre-ft |
| Surface Area | 50 acres |
| Year Completed | 1945 (81 years old) |
| NID ID | SC01169 |
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
SC DEPARTMENT OF NATURAL RESOURCES
State Government
Nearby Dams
Small Upper Mtn Lake
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High Hazard 24 ftLake Ashley Dam
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High Hazard 28 ftJames A Thompson Dam 2
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High Hazard 12 ftChester State Park Dam
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High Hazard 26 ftJames A Thompson Dam 1
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High Hazard 23 ftIsabel Fanning Dam
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Low Hazard 30 ftEvergreen Timberland Dam
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Significant Hazard 16 ftChester Res Dam
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High Hazard 40 ftFrequently Asked Questions
What is the hazard classification of Large Upper Mtn Lake?
Large Upper Mtn Lake 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 Large Upper Mtn Lake?
Large Upper Mtn Lake is owned by SC DEPARTMENT OF NATURAL RESOURCES (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Large Upper Mtn Lake built?
Large Upper Mtn Lake was completed in 1945, making it 81 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 Large Upper Mtn Lake?
Large Upper Mtn Lake serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Large Upper Mtn Lake?
Large Upper Mtn Lake 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 Large Upper Mtn Lake last inspected?
Large Upper Mtn Lake was last inspected on November 10, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.