The Defiance arrived in Monroe on July 2 with coal for DTE Energy, then departed the following day bound for Calcite, keeping the mid-lake corridor busy as the summer shipping season shifts into high gear. The vessel's quick turnaround reflects steady demand for power-generation fuel and aggregate across the southern lakes, a pattern backed by consistent port activity from Toledo to Cleveland.
Limestone and ore movements dominated the past two days. The Sam Laud cycled through Marblehead, Lorain, and Cleveland in rapid succession, loading and delivering limestone for multiple terminals. American Mariner and American Integrity both arrived in Cleveland with ore for the Bulk Terminal, while the Joyce L. VanEnkevort pulled into Marblehead to load. The Federal Hamilton swung into Toledo's Midwest Terminals, and smaller operators like the Clyde S. VanEnkevort and Albert maintained their schedules between ports. The Double Skin 509A remains at Michigan Paving in Monroe, still working through its unload.
Water levels continue to favor deep-draft operations across the system. Lake Erie sits at 3.06 feet above Low Water Datum, while Lake Ontario tops the region at 3.92 feet. Lake Michigan and Huron both hold steady near 2.3 feet above datum. The National Weather Service forecast scattered thunderstorms on Lake Huron today with waves running 2 feet; other lakes expect calmer conditions with 1-foot waves as high pressure systems settle over the basin through Sunday.
Environmental researchers at Notre Dame have completed a landmark 40-year study tracking forever chemicals (PFAS) through Great Lakes food webs, examining nearly 2,500 samples of living organisms. The work sheds light on persistent contamination patterns that shipping communities and water managers continue to monitor as restoration efforts accelerate along vulnerable ecosystems like the rare ravines on Michigan's western shore.