Holt Lock and Dam
Key Takeaway
Holt Lock and Dam is classified as high hazard in Alabama. It was completed in 1968 and is 58 years old. Its primary use is navigation. 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 Height | 58 ft (taller than 95.5% in AL) |
| Dam Length | 1,400 ft |
| Dam Type | Gravity |
| Max Storage | 187.4K acre-ft |
| Normal Storage | 118.0K acre-ft |
| Surface Area | 3,300 acres |
| Drainage Area | 4,232 sq mi |
| Max Discharge | 639,500 cfs |
| Year Completed | 1968 (58 years old) |
| NID ID | AL01426 |
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
USACE - Mobile District
Federal Government
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High HazardFrequently Asked Questions
What is the hazard classification of Holt Lock and Dam?
Holt Lock and 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 Holt Lock and Dam?
Holt 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 Holt Lock and Dam built?
Holt Lock and Dam 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 Holt Lock and Dam?
Holt Lock and Dam serves the following purposes: Navigation, Recreation, Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Holt Lock and Dam?
Holt Lock and Dam has a dam height of 58 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 Holt Lock and Dam last inspected?
Holt Lock and Dam was last inspected on December 13, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.