On 6/11/13 at 1729 hours, I was at the Scorpion Bay Marina when I was approached by subject.  subject wished to report her friend Victim had suffered an injury while they were skiing.  I was directed to the vessel and contacted Victim.  Victim had a laceration the top of her left foot.  Victim stated this was from the prop of the boat.
I contacted the Vessel operator, Operator who told me the following.  Operator was not familiar with the twin lever operation of the vessel.  Subject and Victim were getting into the water behind the vessel to ride on a tube.  Operator started the vessel while it was in reverse.  Victim was pulled into the back of the vessel and under the vessel.  A passenger jumped into the water and pulled Victim out.
Victim was transported to Scorpion Bay Marina.  Operator and Subject only knew the location of occurrence as the Agua Fria River area.
Victim was treated by Peoria Fire E199 and transported to North Peoria ER.
No Further.
Peoria, AZ