John C. Stennis Lock and Dam
Key Takeaway
John C. Stennis Lock and Dam is classified as significant hazard in Mississippi. It was completed in 1980 and is 46 years old. Its primary use is navigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 1,000 ft |
| Dam Type | Gravity |
| Max Storage | 59.5K acre-ft |
| Normal Storage | 59.5K acre-ft |
| Surface Area | 8,910 acres |
| Drainage Area | 4,440 sq mi |
| Max Discharge | 628,200 cfs |
| Year Completed | 1980 (46 years old) |
| NID ID | MS03056 |
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 - Mobile District
Federal Government
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Unknown 11 ftFrequently Asked Questions
What is the hazard classification of John C. Stennis Lock and Dam?
John C. Stennis 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 C. Stennis Lock and Dam?
John C. Stennis Lock and Dam is owned by USACE - Mobile District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was John C. Stennis Lock and Dam built?
John C. Stennis Lock and Dam was completed in 1980, making it 46 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 C. Stennis Lock and Dam?
John C. Stennis Lock and Dam serves the following purposes: Navigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was John C. Stennis Lock and Dam last inspected?
John C. Stennis Lock and Dam was last inspected on April 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.