In 2022 and 2023, the Lower Mississippi River reached historic lows. In October 2023, the U.S. Geological Survey’s Memphis stream gauge read minus 12.0 feet. The previous year also in October, the gauge read minus 10.8 feet.
As the water lowered, draft restrictions were issued, meaning barges had to lighten their loads in order to sit higher in the water and not hit bottom. The number of barges in tow was also reduced. Both restrictions meant less of any given commodity moving along the Mississippi, the key marine highway for the Midwest and Mid-South to get agriculture products to the Port of New Orleans for export.
Source : uada.edu/