Injury occurred on 03-29 at 3AM but not reportable until 04-03. IE was laying on the ground swinging a hammer trying to knock out a brace pipe that was causing the cable reel to stick. The brace/guard was bent by a rock in road or the ruts in the road at the feeder. The pipe was moving and the IE swung again, missed the pipe and struck his shin, just below the knee.