RedactedNarrative: On July 23, 2016 at 1545 hours I was contacted by Officer#1 about a boating accident that occurred and I needed to work at Eureka City Lake.   I arrived at Greenwood County Hospital to meet with a deputy that worked the accident at 1645 hours.  The deputy pointed out a group of people that were in the boat with the accident and I made contact with the group.  I spoke with Tuber1 who told me he was on a tube with Tuber2 when the accident happened.  Tuber1 stated they had caught a wave and went airborne and landed on top of each other in the water.  Tuber1 stated Tuber2 landed on his hip face first.  Tuber1 had a small cut to his hip.  The deputy then stated Tuber2 was knocked out and when he woke up it was about 15 minutes after the accident.  The deputy also stated he was incoherent and was being flown to Wichita for further treatment.  I asked Tuber1 who the boat driver was and he stated it was Operator1.  I spoke with Operator1 next to find out what occurred.  Operator1 stated they were on the boat and their parents were on another boat in the same area of the lake.  Operator1 stated he saw somebody fall while tubing from his parent’s boat so he did a wide circle around the boat.  Operator1 stated when he was completing the circle, the wake from the other boat arrived to their boat and the tube flew about 10 feet into the air and the occupants landed on each other.  I asked Operator1 if he had completed a boater safety course to which he replied he had taken the on-line course.  I also asked Operator1 if anybody had been drinking alcohol and Operator1 stated nobody had and I couldn't detect the smell on any of them.  I then collected the information of all the occupants and cleared the hospital.  I next went to Eureka City Lake to make contact with the lake caretaker.  He showed me where the accident occurred on the lake and brought me to the boat involved so I could collect that information.  I arrived at the boat and viewed all the safety equipment on board.  I collected the information and cleared the lake at 1745 hours.