CSX has a new customer in New Boston, Plastic Omnium. They opened late 2013. I don't know when rail service started. Looks like they have two tracks with four spots each for unloading plastic pellets.
PO also has a plant west of Adrian serviced by ADBF.
Locomotive identification, railfan locations, frequency information, etc. can be found here.
PatC created a monster, 'cause nobody wants to see Don Simon no more they want AARR I'm chopped liver, well if you want AARR this is what I'll give ya, bad humor mixed with irrelevant info that'll make you roll your eyes quicker than a ~Z~ banhammer...