Thick ice and changing wind is slowing down the Great Lakes shipping season and making it a historically slow start for the Soo Locks.
The Soo Locks opened for the season on March 25 and a week later, no commercial vessels have passed through. The U.S. Army Corps of Engineers reports only Coast Guard ice breakers have used the locks, which is highly unusual.
The U.S. Coast Guard reports a small convoy is trying to make its way across Lake Superior Tuesday, but it's slow-going. The U.S.C.G. Cutter Mackinaw is helping break ice for two commercial vessels. Officials estimate the group could make it to the Soo Locks on Thursday, but say that's being hopeful.
Monday, the group traveled only 14-miles in 14-hours due to tremendous ice on Lake Superior, shifting winds and rain.
Officials say usually there are several ships waiting to pass through the locks on opening day.