On 4/21/2001 , the vessel ALISON H (Official Number 510062) was involved in a not involved in NE THRASHER ROCK, B.C., BRITISH COLUMBIA (BC).

The vessel, with 4 persons on board, experienced the incident while engaged in regular operations. Fortunately, the ship was able to continue its voyage. No injuries or fatalities were reported, and there was none pollution.

This incident was officially recorded by Transport Canada on 10/10/2001. Weather at the time was reported as clear with winds from the N at 6.00 knots.

Concrete constructed pontoon under tow of the US tug "ALISON H" taking on water through flush deck hatch openings. Coast Guard vessels stabilized the pontoon which was towed to Nanaimo for repairs before continuing the voyage to Ketchikan, Alaska.