Thornley Pond Dam
Key Takeaway
Thornley Pond Dam is classified as high hazard in South Carolina. It was completed in 1940 and is 86 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 | 14 ft (taller than 19.3% in SC) |
| Max Storage | 156 acre-ft |
| Normal Storage | 56 acre-ft |
| Surface Area | 20 acres |
| Year Completed | 1940 (86 years old) |
| NID ID | SC00959 |
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
DANGERFIELD HOLDINGS LLC
Private
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What is the hazard classification of Thornley Pond Dam?
Thornley Pond Dam 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 Thornley Pond Dam?
Thornley Pond Dam is owned by DANGERFIELD HOLDINGS LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Thornley Pond Dam built?
Thornley Pond Dam was completed in 1940, making it 86 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 Thornley Pond Dam?
Thornley Pond Dam 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 Thornley Pond Dam?
Thornley Pond Dam has a dam height of 14 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 Thornley Pond Dam last inspected?
Thornley Pond Dam was last inspected on March 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.