Johnsons Lake Dam
Key Takeaway
Johnsons Lake Dam is classified as low hazard in South Carolina. It was completed in 1955 and is 71 years old. Its primary use is recreation.
Physical Details
| Dam Height | 15 ft (taller than 23.6% in SC) |
| Max Storage | 77 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 11 acres |
| Year Completed | 1955 (71 years old) |
| NID ID | SC01316 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
WILLIAM SCOTT JOHNSON SR AND NAOMI F JOHNSON TRUSTEES ET AL
Private
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High Hazard 13 ftRobert Wright Dam
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High Hazard 15 ftMyron Bolen Dam
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Low Hazard 16 ftFrequently Asked Questions
What is the hazard classification of Johnsons Lake Dam?
Johnsons Lake Dam is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnsons Lake Dam?
Johnsons Lake Dam is owned by WILLIAM SCOTT JOHNSON SR AND NAOMI F JOHNSON TRUSTEES ET AL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnsons Lake Dam built?
Johnsons 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 Johnsons Lake Dam?
Johnsons 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 Johnsons Lake Dam?
Johnsons Lake Dam has a dam height of 15 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 Johnsons Lake Dam last inspected?
Johnsons Lake Dam was last inspected on August 16, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.