John H. Overton Lock and Dam
Key Takeaway
John H. Overton Lock and Dam is classified as significant hazard in Louisiana. It was completed in 1987 and is 39 years old. Its primary use is navigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 914 ft |
| Dam Type | Gravity |
| Max Storage | 67.5K acre-ft |
| Normal Storage | 67.5K acre-ft |
| Surface Area | 3,750 acres |
| Drainage Area | 67,458 sq mi |
| Max Discharge | 255,000 cfs |
| Year Completed | 1987 (39 years old) |
| NID ID | LA00581 |
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
USACE - Vicksburg District
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of John H. Overton Lock and Dam?
John H. Overton Lock and Dam 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 John H. Overton Lock and Dam?
John H. Overton Lock and Dam is owned by USACE - Vicksburg District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John H. Overton Lock and Dam built?
John H. Overton Lock and Dam was completed in 1987, making it 39 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 John H. Overton Lock and Dam?
John H. Overton Lock and Dam serves the following purposes: Navigation, Recreation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was John H. Overton Lock and Dam last inspected?
John H. Overton Lock and Dam was last inspected on March 2, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.