Mississippi River Locks and Dam 27
Key Takeaway
Mississippi River Locks and Dam 27 is classified as significant hazard in Missouri. It was completed in 1962 and is 64 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 | 3,240 ft |
| Dam Type | Rockfill |
| Max Storage | 0 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,300,000 cfs |
| Year Completed | 1962 (64 years old) |
| NID ID | MO10302 |
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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Significant Hazard 30 ftFrequently Asked Questions
What is the hazard classification of Mississippi River Locks and Dam 27?
Mississippi River Locks and Dam 27 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 Locks and Dam 27?
Mississippi River Locks and Dam 27 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 Locks and Dam 27 built?
Mississippi River Locks and Dam 27 was completed in 1962, making it 64 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 Locks and Dam 27?
Mississippi River Locks and Dam 27 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 Locks and Dam 27?
Mississippi River Locks and Dam 27 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 Locks and Dam 27 last inspected?
Mississippi River Locks and Dam 27 was last inspected on April 1, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.