What is the capacity of a unit coal train?
This depends on the capacity of the railcars used and the length of the train. In the 1970s, 100-car unit trains carrying 100 tons per car carried 10,000 tons per train. Nowadays, 120-car trains are normal with each car carrying roughly 120 tons. Thus the capacity of a modern unit coal train is around 15,000 tons per train.