Plan components included offloading ballast water and refloating the Calumet. Efforts to refloat the vessel are scheduled to begin Friday evening. It traveled on its own power to an anchoring spot near Lake Nickolet for inspection and there was no damage to the hull. On Saturday morning, with the river open, the number had been cut to seven.
Until the ship's company, Grand River Navigation Inc., comes up with a safe salvage plan the waterway will remain closed to other commercial vessels.
There are seven vessels waiting to transit upbound and downbound on the river.
An investigating officer and safety officer from the Coast Guard are on board the Calumet. No pollution was observed.More news: Light plane flips on landing in Queensland
Contracted divers conducted an initial assessment of the vessel's stern and determined that it is structurally sound.
The cause of the grounding remains under investigation.
The U.S. Coast Guard reported that the vessel left Essar Steel in Sault Ste. Marie, Ontario, and was heading down the river, having passed through the Soo Locks, to its next port of call in Brevort, Mich., when it ran aground at about 11:40 p.m. local time Wednesday, the Coast Guard reported. The ship was not carrying any cargo, which made freeing it less complicated.