THE EMPLOYEE STATED HIS INJURY OCCURRED WHEN HE WAS ATTEMPTING TO ROTATE A 50 LB. CHUTE LINER PLATE IN THE SURFACE CRUSHER. THE EE SAID THE STRAIN OCCURRED WHEN HE TRIED TO LIFT THE LINER PLATE USING A SCRAPER HOOK. THE EE SAID HE MISJUDGED THE WEIGHT OF THE LINER PLATE. NOTE: THE EE REPORTED THE INJURY ON 3/30/05.