THE EE WAS LOADING THE PIPE TRAILER WITH 6 INCH WATERLINE. AFTER HE FINISHED HE FELT PAIN IN HIS LOWER BACK AND HAD TROUBLE BENDING OVER. THE EE FINISHED OUT HIS SHIFT. THE NEXT DAY 2-13-01 HE REQUESTED TO SEE A DR. AND WAS PLACED ON RESTRICTED DUTY(2-14-01).