Question

What is being transported by the barge

Answer 1

Items. 

But if we're being serious, there are a lot of barges to talk about so you'll need to be more specific.

Answer 2

A typical barge can carry up to 1,500 tons of cargo. Today, most barges carry heavy or bulky items that would be difficult to transport any other way. Some typical items you might find on barges include coal, grain, oil, chemicals, trash, recyclable materials, sand, gravel, timber, iron ore and other minerals.Dec 12, 2012