In that line of thought:
BTU’s mines are all in the western U.S., UP is the rail with the most direct exposure. Estimate BTU accounted for about 38% of UP’s coal vols in 2015. But note that rail coal contracts are with utilities and not coal producers. This limits risk for UP .
And a notable threshold/trend:
. For the 1st time, CSX reported more intermodal than coal rev. Coal projected to account for 14% of total rev. this year and intermodal to account for 16%. Just 5 years ago, coal accounted for 32% of total rev. and intermodal 12%. Coal still more profitable