UP is putting in new sidings in my area and yesterday a stange train pulled into the area. It has a conveyor contraption at each end of 40 or so open top hopper looking cars. I can't get close to get a good look but it appears the cars must have a live conveyer underneath that catches ballast and conveys it to the two-car conveyer contraption at each end. The first of the two conveyer cars catches ballest from beneath and lifts it for the end conveyer car that can swivel its conveyer off to the side to drop the ballast. Is this what I'm seeing?