Historically, the nation's barges have transported much of the nation's coal. In fact, barges are second only behind rail for moving the nation's primary energy source to the power plants that use it. But in June, the EPA put out a new rule to cut carbon emissions by thirty percent by 2030. The rule's impact on power plants is direct. But what about the impact on the barge industry?  Please click here for the full KCRU story.