Great Lakes: How the Coast Guard Is Dealing With the Ice

See what they are doing this winter.

— -- Because of the bitter cold temperatures this winter, the Great Lakes right now are more than 85 percent frozen -- more frozen than they have been all season.

Shipping slows down during the winter months, but there are still many important shipments that need to get through, including vital road salt that Midwest communities are relying on to clear streets and highways.

The Katmai Bay also works as a lifeline to those vessels that are stuck in the ice, often helping to clear a path for the ships to make their way to port.

There's so much ice build-up right now, the U.S. Coast Guard believes it will have to work to keep shipping channels clear in the Great Lakes for at least the next few months.