A generator fire aboard the Paul R. Tregurtha stopped the ship in Whitefish Bay early Monday.
The vessel master of the 1,013-foot lake freighter reported the fire extinguished at 5:30 a.m., said the United States Coast Guard, which said in a news release that it received the first call of the incident at 4:20 a.m.
There were no injuries or pollution, and all 23 crewmembers are accounted for. The ship is carrying 68,200 tons of coal, 124,000 gallons of fuel, and 88,000 gallons of caustic soda, said the Coast Guard.
The ship remained stopped outside Sault Ste. Marie by midmorning on Monday. The Coast Guard said it has dispatched resources to monitor the situation and to conduct a Marine Casualty Investigation into the cause of the incident.
The motor vessel Paul R. Tregurtha is anchored near Point Iroquois, in Whitefish Bay.