The Mark W. Barker makes a rare stop in Duluth arriving with salt for the Envirotech-Hallett Dock 8, 11 April, 2026. Photo by Gus Schauer. #ShipsOfMastodon #GreatLakes #LakeSuperior #DestinationDuluth “After unloading, the newest U.S.-flagged Great Lakes bulk carrier (2022) went out into the lake to wait for fleetmate Oberstar to clear Canadian National Dock 6.” - David Schauer