A few years back when I was younger I used to hang around and watch a train switch gondolas loaded with rock in and out of a cement refinery and even watch the trackhoe climb up the ramp into the cars and unload them walking from one car to the next which was dumped on a conveyor that has two hopper bins and transferred a few yards away in the yard to a pile. One hopper bin was at car height next to the track where the cars were unloaded by trackhoe. The section of the track right in front of it had a pit with steel grid plating. Down under that was a hopper bin in a small concrete wall room where the same conveyor belt ran. I think about two times out of all the years I've hung around that place I've only seen about 4-5 set's of these car's to be brought in other wise it was nothing but gondolas. When these hoppers were brought in they had a number of people who were also put on the task to unload these car's rather than just one guy with a trackhoe. The car's hopper bays would be positioned over the hole and opened up by the gang and controlled so the conveyor didn't get to full only allowing for what the conveyor belt could handle. (which was a lot)! Now what I'm curious to know is what kind of hoppers these are because I would like to prototype this plant on a club module but never could figure out what kind of hoppers they are and who makes them. I'm sure the most recognizable feature is the walking platforms on both ends like a locomotive with handrails. The top of the hopper is open and has a bay's that run from side to side on the car but I'm not sure how many there were. Another thing is that they were a bright caboose red with white letters and markings. I brought this up because the ITT Tech commercial on TV show's the exact same cars and it brought back these memories. I believe the last cut of this type I seen I was 12 years old and that was the last time I've ever seen any like them. I'm sure someone here knows what they are. I'm just curious as to what kind they are and who makes models of them.