DUMPTRAIN Specialized MOW train seen in Hagar City, WI on the BNSF St. Croix Sub. Georgetown Rail Equipment Co. (GREX) provides the DumpTrain system, a highly efficient and one-person operated system for delivering large quantities of materials like ballast or aggregate. Each car unloads onto a full-length conveyor, which moves the material to a pivoting transfer conveyor at the end of the train for unloading on either side of the tracks. This system can be customized for straight sections or cu