The Great Lakes Towing Company and McKeil Marine recently performed a joint assist on the 'CSL Assinboine', a 739-foot laker in Canadian Steamship Company’s fleet. The Great Lakes Towing Company tug North Carolina departed Duluth and met McKeil Marine’s tug Leonard M with the CSL Assiniboine in tow. The North Carolina assisted the laker on the stern while the Leonard M towed the vessel on the bow. Upon rrival at Duluth, the Leonord M was released, then the Great Lakes Towing Company's tugs North Carolina…