RedactedNarrative: On Thursday, 3/27/2014, at approximately 4:24 PM, I (CPO) was notified by subject that at approximately 11:37 AM, Chicago Fire Boat (Vessel 1) was responding to a call related to a bridge worker falling into a trench near a bridge embunkment. Chicago Police Marine Unit responded as well, ahead of the Vessel 1. The call resulted in a bridge worker having two broken arms due to the fall. During the response, Vessel 1 traveled west on the Chicago River and passed the Marina City Boat Marina, where at least three boats were tied, and shrink wrapped due to Subject2 storage. During the passing, Vessel 1 produced a large wake, significantly bigger than that of the Chicago Police Boat that passed by approximately 6 minutes earlier. The wake resulted in damage to one stored boat (Vessel 2) at Marina City, and nine pilings. Vessel 2 sustained damage to starboard side rub rail and a large chip in the gel coat through to the fiberglass, approximately 2 inches in length. The 9 wooden pilings, which normally create a buffer between boats tied to the piers and are used for tying boats to the pier, had significant damage as well. Of the 9 pilings, 4 need the rubrail re-attached, the other 5 were broken, 1 of the 5 was broken in half. Photos of all damage was taken, and video of the occurance has been recorded as well. 
  
  On Friday, March 28, 2014 at approximately 1:54 PM I arrived on scene. I met with subject2, an office assistant at Jefferson Beach Yacht Sales located in Marina City, and witness to the incident. Subject2 explained and showed via security footage how the boats acted to the wake caused by the Chicago Police Boat, and explained the difference between that and the wake given off by Vessel 1. Subject2 pointed out on the security footage the action of the boats in comparison to the two wakes. Subject2 also explained the cracking and slamming noises after Vessel 1 passed the marina. Subject2 stated she attempted to contact Vessel 1 on radio, and wrote a statement in relation to the conversation she and Vessel 1''s operator had. Subject2 said she contacted the owner of Vessel 2 and contacted the Owner of the marina. Subject2 also said Chicago Police Officer had taken a police report, along with pictures. Officer was also provided with video footage from cell phone camera of eyewitnesses to the accident. I have since spoken with Officer and retrieved a copy of his report and copy of the CD containing the photos and video. 
  
  On Saturday, March 29, 2014, I spoke with 2 firemen aboard Vessel 1 and asked about their observations during the accident. Firefighter stated he did not see anything, and was not sure as to any wrong doing since he was not familiar with boats and normally not assigned to Vessel 1. Firefighter said he normally is stationed on Vessel 1, and they had conducted the response as they normally did during many past evolutions. Neither firefighter could provide pertinent information in regards to Vessel 1''s maneuvers or speed during the evolution in question. I am still waiting to hear back from the operator. During this investigation I spoke with Officer regarding his report, he said that earlier an unknown bridge worker stated the wake of Vessel 1 caused a line to snap on a barge, and that when they were on scene to assist the injured bridge worker, Vessel 1''s wake forced the Chicago Police Boat to break away from the scene to avoid damage and injury. 
  
  Once more information is made available to me, I will submit a finalized report. Charges are pending and will be further understood after a meeting with a Chicago State''s Attorney.