EE was working alone on the upper deck of the HW miner. EE said stepped on a roller. It rolled EE's foot out from under EE, falling and hurting their back. EE refused medical treatment. EE continued working until Sep.1st. EE sent us a letter from chiropractor dated Sept 8th stating EE was off under the chiropractor's care until Sep 11th at which time EE was supposed to see a Dr.