In an effort to improve safety at the site, about 4-6 inches of concrete will be replaced along the lock at Lock and Dam No. 6 on the Upper Mississippi River near Trempealeau, Wis. The St. Paul District of the US Army Corps of Engineers and contractor Kraemer North America are also upgrading the tow rail system that guides barges through the locks.
USACE to update lock, dam in Wis.
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