EMPLOYEE WAS ASSIGNED TO GET ON TOP OF A RAILROAD HOPPER CAR IN ORDER TO HOOK UP LIDS AND BULK HOSES. ONCE LIDS AND HOSES ARE HOOKED UP WE PUMP FULL OF DIATOMACEOUS EARTH POWDER PRODUCT. IT AP PEARS THAT EMPLOYEE FELL FROM THE LADDER ATTACHED TO RAIL CAR A HEIGHT OF APPROX 6 FT TO THE CONCRETE GROUND.