Johnson Dam
Key Takeaway
Johnson Dam is classified as high hazard in North Carolina. It was completed in 1983 and is 43 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 Length | 430 ft |
| Dam Type | Earth |
| Max Storage | 75 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 84 sq mi |
| Max Discharge | 150 cfs |
| Year Completed | 1983 (43 years old) |
| Year Modified | 2011 |
| NID ID | NC02190 |
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
Alexander J Lim
Private
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High HazardFrequently Asked Questions
What is the hazard classification of Johnson Dam?
Johnson 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 Johnson Dam?
Johnson Dam is owned by Alexander J Lim (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson Dam built?
Johnson Dam was completed in 1983, making it 43 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 Johnson Dam?
Johnson Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Johnson Dam last inspected?
Johnson Dam was last inspected on February 7, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.