EE called on 1/19/05 & said he had hurt his back on 01/17/05 while operating a dozer.He states that when he backed over a rock, it caused him to be jerked around in the seat and strained his back.We have not been able to contact him since to get further information on his condition.Noone is sure of his length of experience in mining, so I have entered 0's for now.