|The tug-barge Joseph H. Thompson is due today with a load of limestone. After discharging that cargo, it will load taconite at the Burlington Northern before departing the Superior entry. The barge part is still most of the hull of a boat built in 1944 as the Marine Robin. It crossed the Atlantic several times during the war and was one of the many boats used in the Normandy invasion. In 1990, the vessel was turned into a barge when the stern and part of the hull were removed. A tug was built from the steel that was removed and was then inserted into a notch built into the back of the barge. It was here 14 times in 2003, and has been making fewer trips since then, coming only 5 times last year. This is the second trip this season.