The switcher for Cosgrove Yard, in North Charleston, prepares to pull out with only locomotives, and grab empty wood chip cars off the track to the far right. Once he gets the chip cars, the connections between all the cars will be inspected and he'll switch at the paper mill, which is at the other end of the yard. These old work horses have become quiet rare now. So it was a real treat to see two of them powering the train!