The Coal & Gypsum is un-loaded from the wagons. Each wagon is disconnected, put on the unloading system rotated such that all the material is unloaded in the hopper. From here it goes to the underground belt conveyor via the feeders to be stacked in their respective stockpiles. The dust is sucked by the ducts and the Electrostatic Precipatator and the fan. This in turn discharges the collected material on the underground belt conveyor.