Duluth Harbor Boat Traffic for Sunday 3/17/2013

The O'Mackinaw left port this St. Patrick's Day morning after taking a swipe at the Duluth-Superior Harbor ice pack.  The O'Mackinaw headed under the Duluth Lift Bridge on its way to the Apostles for more ice breaking operations.
Watch Ken Newham's video ride on the Mackinaw

Video from Detroit Free Press