Wilbur D. Mills Lock and Dam
Key Takeaway
Wilbur D. Mills Lock and Dam is classified as significant hazard in Arkansas. It was completed in 1967 and is 59 years old. Its primary use is navigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 31 ft (taller than 62.3% in AR) |
| Dam Length | 10,000 ft |
| Dam Type | Concrete |
| Max Storage | 133.2K acre-ft |
| Normal Storage | 110.1K acre-ft |
| Surface Area | 10,600 acres |
| Drainage Area | 160,475 sq mi |
| Max Discharge | 371,200 cfs |
| Year Completed | 1967 (59 years old) |
| NID ID | AR00169 |
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 - Little Rock District
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Wilbur D. Mills Lock and Dam?
Wilbur D. Mills 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 Wilbur D. Mills Lock and Dam?
Wilbur D. Mills Lock and Dam is owned by USACE - Little Rock District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wilbur D. Mills Lock and Dam built?
Wilbur D. Mills Lock and Dam was completed in 1967, making it 59 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 Wilbur D. Mills Lock and Dam?
Wilbur D. Mills 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.
How tall is Wilbur D. Mills Lock and Dam?
Wilbur D. Mills Lock and Dam has a dam height of 31 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 Wilbur D. Mills Lock and Dam last inspected?
Wilbur D. Mills Lock and Dam was last inspected on December 2, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.