FMGX 100000 (could have been FGMX but dont think so) It was green with what looked like welded over windows and said USDA something inspector something.
This was on a yard cut being switched out by an SD70ACe and GEVO…and no it wasnt a road train, these units had been switching the day before too, and right before a ATSF GP38 went by with a GN Snow Dozer.