U.S.-flagged Great Lakes freighters moved 85.7 million tons of cargo in 2017, an increase of 3 percent compared with 2016. The 2017 float was, however, 2.4 percent behind the fleet's long-term average, the Lake Carriers' Association reported.
Iron ore cargoes for steelmaking totaled 46 million tons, an increase of 4.3 percent compared with 2016.
Coal loadings increased 2.8 percent to 13.3 million tons.
Limestone cargoes increased 1.7 percent to 21.55 million tons.