EE was overhead welding at dragline. Stated his back started hurting. Pain went to his side & around to his chest. He was taken by ambulance to local ER. Investigations have been conducted by Tx Westmoreland Coal Co. & Company's WC insurance carrier. On 4/19/11, after completion of WC investigation, Co. was informed that a herniated disc in EE's back was result of on job inj.