RedactedNarrative: Both vessels were operating in a southern direction leaving a river channel on the Chippewa Flowage coming into a bay. The lead boat, Vessel #2 had slowed down to almost a stop when the first vessel had what the operator believed to hit either the wake from the first boat or an underwater object such as a log. 
  
  The operator of vessel #1 indicated that she could not clearly see the boat in front of her due to 3 children and a dog in the boat and this also lead to the accident. The operator of vessel #1 stated that she believed she struck the vessel in front of her although the operator of vessel #2 stated that he didn't think the vessels collided, and vessel #1 did not appear to have damage from this. 
  
  It appeared that after the underwater object or the wake from the lead boat was hit that the boats were very close to one another and the child that suffered the most injuries may have possibly hit a ski rack that was attached to this vessel, and it is believed that the dog in the boat was thrown into the same child causing injuries. The operator of vessel #1 stated that she did observe damage to the propeller of her vessel that was not there prior to the accident. This would indicate that a underwater object was struck.