Great Lakes cargo traffic dropped 7 percent from July to August, according to an article in the Green Bay Press Gazette:

Cargo traffic on the Great Lakes dipped almost 7 percent in August from July, but the amount of cargo carried by U.S.-flag freighters last month was on par with the five-year average for the month.

Meanwhile, the Journal of Commerce reports that cargo shipped in the St. Lawrence Seaway rose 3.5 percent:

Cargo shipped on the St. Lawrence Seaway from late March through August rose 3.5 percent year-over-year, as raw material shipments for the region’s steel industry grew during one of the historically slowest periods of the year.