These are photos of a barge tow going up the Mississippt. It is hard to see how long it really is because it blends with the trees on the other side of the river, but it is pushing fifteen barges tied together (3 wide by 5 long) Each of these tows carry the equivalent of 870 semi trucks loads of grain. If the trucks were on the highway they would stretch for 35 miles. 60% of all farm products exported from the US are shipped down the Mississippt.