RedactedNarrative: I received notice of this incident after the fact but was able to contact Evanston EMS, Northwestern University Police, Northwestern University Sailing Center Supervisor and the watercraft operator Operator in order to get the following incident summary: 
  
  On July 25, 2014 at approximately 2:00PM Northwestern University Sailing Center employee Operator was operating a 14''5” Brig Inflatable 500 Series watercraft (HIN QRK23956L112) towing 4 children and 1 adult (names unknown) in a tube in Lake Michigan just east of Northwestern University''s North Beach swimming area (adjacent to 2311 Campus Drive, Evanston, IL). Operator was headed southwest then proceeded to execute a 180 degree turn to the north to drop off the tube passengers in the area just south of the roped off swimming only area. Operator was looking over his shoulder to ensure that the passengers had been dropped off when the starboard bow of the watercraft hit its own wake and Operator was ejected over the port side. Operator was wearing a PFD but was not wearing the engine cutoff lanyard. The impact of the wake altered the course of the watercraft sending it to the west into the swimming only area. A lifeguard was sitting on a rescue board on the far eastern border of the swimming area. The watercraft struck Lifeguard head on causing her to be pushed under the watercraft. The watercraft hit the beach and stopped approximately 10'' onshore. Another lifeguard, brought Lifeguard back to shore. 
  
  Evanston EMS arrived on scene and transported Lifeguard to North Shore Hospital. 
  
  Lifeguard sustained broken ribs and pelvic bone and lacerations to her spleen and kidneys causing internal bleeding. She has since been released from the hospital and is recovering at home. She will need physical therapy. 
  
  No citations were issued. Operator had moved to Canada. 
  
  Neither Northwestern University Police nor Northwestern University Sailing Center had record of the names of the occupants of the tube being towed by the watercraft at the time of the incident. 
  
  Attachment: Northwestern University Police Department Case Field Report and Supplemental Field Report