We used to have one of these here near downtown, but it closed many years ago. It also did the creosote treatment of the ties. It was located inside the large wye junction of three railroads (good for shipping the finished product) and had its own narrow gauge trackage for the movement of work. Back then the slash was just burned to make steam for the pressure treating of the wood. We also have a Sauder Woodworking complex near here. It is highly automated and basically the raw materials are unloaded from rail cars, loaded into the factory, and finished, boxed ready to assemble product comes out the other "end". At this plant, all scraps are automatically captured, transported by air handlers, and burned to produce steam to spin electric generators. The surplus electricity is fed back into the grid. No scraps to pickup or take away.
I've gone out to find myself. If I return before I get back, have me wait for me.
"Sawdust is Man Glitter"