RedactedNarrative: PWC #1 was traveling in front of PWC #2 in front of Black Canyon Park.  PWC #1 turned to the starboard side and slowed down coming to a stop.  PWC #2 turned to the starboard side but did not avoid PWC #1 and hit PWC #1 starboard side.  The operator of PWC #1 was transported to the hospital for an injury to his hip.