In one of the tsw2 skyhook games screenshots it show some kind of loading tower could this suggest the possibility that perhaps one of the wagons included could be a hopper or gondola car so as to load whatever that mine digs up,this would definitely plus up this routes to do list.
The Potash Mine only loads into covered hoppers, hopefully they are different models from the grain hoppers from SPG and OSD. Here's a few videos from the real life local.
