Johnson Dam
Key Takeaway
Johnson Dam is classified as low hazard in Alabama. It was completed in 1940 and is 86 years old. Its primary use is recreation.
Physical Details
| Dam Length | 695 ft |
| Dam Type | Earth |
| Max Storage | 210 acre-ft |
| Normal Storage | 193 acre-ft |
| Year Completed | 1940 (86 years old) |
| NID ID | AL00218 |
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
TIMOTHY G KNAPP
Private
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Low Hazard 19 ftFrequently Asked Questions
What is the hazard classification of Johnson Dam?
Johnson 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 Johnson Dam?
Johnson Dam is owned by TIMOTHY G KNAPP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnson Dam built?
Johnson 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 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.