ST. PAUL, Minn. – The early shipping season on the Upper Mississippi River may start out less robust than usual, the U.S Army Corps Engineers, which operates dams and locks, said. Construction south at Lock and Dam 25 near Winfield, Missouri, will limit navigation on the entire ruver until the end of the month.

Earlier: Sure sign of spring: The first barge array

River economies

Army Corps: The usual 15-barge tow can move as much bulk commodities as 1,050 semis or 200 rail cars.