EE suffered a low back injury when a boat flipped over in the water. Boat came to rested on dredge pipe EE retrieved by fire/rescue. EE went to a clinic/diagnosed w/a contusion to the back. Released with restrictions did not prevent normal job. Full duty 5/5. 6/5 EE provided supervisor with a Psych Eval removing EE from duty due to PTSD due to the 4/17 incident.