MinnPost

Here’s how the locks and dams on the Mississippi River work, and why they exist

… but our independent journalism isn’t free to produce. Help us keep it this way with a tax-deductible donation today. Get on a boat on the upper Mississippi River, and you’ll eventually come upon a ...
The Gazette

Here's how locks and dams on the Mississippi River work, and why they exist

The tug Theresa L. Wood heads upstream after locking through Lock and Dam #8 in May in Genoa, Wis. The vessel was moving barges from St. Louis to Winona, Minn. The locks allow the boats to gradually ...