THERE WAS A LEAK ON THE CLINKER CHUTE. EE HAD TO REMOVE SILO DOOR TO SHOVEL THE CLINKER IN. THE SPILLED CLINKER CAUSED POOR FOOTING. EMPLOYEE WAS PICKING THE DOOR UP OFF OF SILO A WHEN HE SLIP PED, CAUSING INJURY TO HIS LOWER BACK. HE WAS TAKEN TO THE DOCTOR WHERE HE WAS DIAGNOSED WITH A LUMBAR STRAIN.