Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island)
Key Takeaway
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) is classified as significant hazard in Tennessee. It was completed in 1968 and is 58 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 41 ft (taller than 56% in TN) |
| Dam Length | 10,066 ft |
| Dam Type | Earth |
| Max Storage | 323 acre-ft |
| Normal Storage | 228 acre-ft |
| Surface Area | 101 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 279 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | TN08512 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
TVA
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island)?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island)?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) is owned by TVA (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) built?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) was completed in 1968, making it 58 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 Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island)?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island)?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) has a dam height of 41 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 Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) last inspected?
Johnsonville Fossil Plant - Ash Disposal Area Perimeter Dike (Island) was last inspected on April 30, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.