Mississippi River Lock and Dam 25
Key Takeaway
Mississippi River Lock and Dam 25 is classified as significant hazard in Missouri. It was completed in 1939 and is 87 years old. Its primary use is navigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 23.5% in MO) |
| Dam Length | 26,400 ft |
| Dam Type | Concrete |
| Max Storage | 176.0K acre-ft |
| Normal Storage | 176.0K acre-ft |
| Surface Area | 13,000 acres |
| Drainage Area | 142,000 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1939 (87 years old) |
| NID ID | MO10301 |
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 - St. Louis District
Federal Government
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Low Hazard 37 ftFrequently Asked Questions
What is the hazard classification of Mississippi River Lock and Dam 25?
Mississippi River Lock and Dam 25 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 Mississippi River Lock and Dam 25?
Mississippi River Lock and Dam 25 is owned by USACE - St. Louis District (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mississippi River Lock and Dam 25 built?
Mississippi River Lock and Dam 25 was completed in 1939, making it 87 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 Mississippi River Lock and Dam 25?
Mississippi River Lock and Dam 25 serves the following purposes: Navigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mississippi River Lock and Dam 25?
Mississippi River Lock and Dam 25 has a dam height of 25 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 Mississippi River Lock and Dam 25 last inspected?
Mississippi River Lock and Dam 25 was last inspected on July 6, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.