THE CONVEYOR LEADING TO WASH PLANT 1 WAS OVER LOADED. THE SKIDSTER THAT IS USUALLY USED TO CLEANOFF THE CONVEYOR WAS DOWN FOR A MECHANICAL REPAIR. TO REDUCE THE LOAD ON THE CONVEYOR, 6 EE MANU ALLY UNLOADED THE CONVEYOR WITH SHOVELS. AS THE EE WAS COMING DOWN, HE LOST HIS FOOTING AND FELL INTO THE BED OF THE PICK UP TRUCK. THE FALL OCCURRED BETWEEN 2-4 FEET.