RedactedNarrative: V1 was traveling south on the Colorado River in the area of Davis Camp.  V2 was traveling north bound. A casino river boat passed and V2 went around the port side of that vessel into the path of V1.  Both V1 and V2 turned to aviod the collision.  
  
  V2 was struck by V1 at the mid point of the starboard side.  Extensive damage to V2 was sustained.  V1 sustained moderate damage.  V2 operator complained of a laceration to the lip from striking the steering yoke.  V1 operator and passenger both were uninjured.