Mississippi River Lock and Dam 5, also known as Pool 5, is a vital structure located in Minnesota, specifically in Winona County. Built in 1935 by the US Army Corps of Engineers, this concrete dam stands at 22 feet high and serves primarily for navigation purposes along the Mississippi River. With a controlled spillway width of 1340 feet, the dam helps maintain a constant pool level for river traffic, even during peak flows of up to 270,000 cubic feet per second. The dam features a single lock measuring 600 feet in length and 110 feet in width, facilitating the passage of vessels through the river.

Although Lock and Dam 5 is considered a moderate-risk dam by the USACE, steps are continuously being taken to reduce potential hazards. Regular inspections, maintenance, and repairs are carried out to ensure the dam's structural integrity and functionality. Identified risks include overtopping of the embankment, deteriorated auxiliary lock gates, and potential deterioration of low-flow conduits. To manage flood risks and ensure public safety, USACE collaborates with state and county emergency managers, conducts public awareness campaigns, and enforces safety measures for swimming and boating in the dam's vicinity. Overall, Lock and Dam 5 plays a crucial role in supporting navigation and recreation along the Mississippi River while maintaining public safety and minimizing potential risks.