While exploring around the abandoned cars, I decided to climb into the gondola at the end of the line that was further away from the still active line the siding branched off from. Inside the car I climbed in were a few sleepers/ties. I didn't climb into any of the other cars, though I assume the others were either empty or had a couple ties, pieces of scrap, or a few pieces of ore in them, though they were most likely empty.