EE was pulling barge line on stern on barge 43, he stated the barge was muddy and he slipped, feeling something wrong in his left knee, he had no pain right away but by the end of the day he felt it hurting. Medical attention 1/28/15, MRI in Torrance Ca on 1/31/15, limits no prolonged walking/climbing, he is still working, we will update report when results from MRI are received.