Upper Twin Mountain Lake Dam
Key Takeaway
Upper Twin Mountain Lake Dam is classified as high hazard in Georgia. It was completed in 1955 and is 71 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 | 36 ft (taller than 88.1% in GA) |
| Dam Length | 554 ft |
| Dam Type | Earth |
| Max Storage | 332 acre-ft |
| Normal Storage | 256 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 376 sq mi |
| Year Completed | 1955 (71 years old) |
| NID ID | GA00681 |
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
Twin Mountain Lakes Club, Inc.
Private
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Low Hazard 37 ftFrequently Asked Questions
What is the hazard classification of Upper Twin Mountain Lake Dam?
Upper Twin Mountain Lake 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 Upper Twin Mountain Lake Dam?
Upper Twin Mountain Lake Dam is owned by Twin Mountain Lakes Club, Inc. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Twin Mountain Lake Dam built?
Upper Twin Mountain Lake Dam was completed in 1955, making it 71 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 Upper Twin Mountain Lake Dam?
Upper Twin Mountain Lake 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 Upper Twin Mountain Lake Dam?
Upper Twin Mountain Lake Dam has a dam height of 36 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 Upper Twin Mountain Lake Dam last inspected?
Upper Twin Mountain Lake Dam was last inspected on January 24, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.