Mississippi River

There are 29 lock and dam structures built along the upper Mississippi River, creating a “stairway of water” that allows pleasure boats, tow boats and barges to travel from St. Louis to St. Paul (or vice versa). These impressive structures help these boats and barges deal with the change in altitude on the northern section of the river (a 420-foot drop from Minneapolis to Granite City, Illinois,
Lock and Dams Info (Wikipedia) Map Info

Navigation responsibilities include planning and constructing navigation channels, locks and dams, and dredging to maintain channel depths of the harbors and inland waterways within its 370,000-square-mile boundary. The division operates and maintains 4,200+ miles of navigable channels, 62 locks, 51 shallow-draft ports and seven deep-draft ports. In partnership with local port authorities, MVD personnel oversee dredging and construction projects at numerous ports and harbors.

St Louis District Website
Metro-East Levee System
control the lock and dams IL Federal/Military Database page
Responsible for maintaining the waterways that flow through a large part of Eastern Missouri and Southwestern Illinois. Located within the District’s boundaries are 300 miles of the Mississippi River, including its four most southerly Lock and Dams and its confluences with the Missouri and Illinois Rivers. Also included are several tributary rivers, dozens of other small streams, and five multi-purpose reservoirs - Lake Shelbyville, Carlyle Lake, Rend Lake, Mark Twain Lake, and Lake Wappapello. These waterways must continually be monitored and regulated to facilitate a number of purposes.

Lock and Dam 25: New 1200-ft Lock Project

Photo/Info
Located in Calhoun County IL and Lincoln County MO at approximately Mile 241.4 on the Upper Mississippi River above the mouth of the Ohio River near Winfield, Missouri.

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