RedactedNarrative: V1 WAS HEADED NORTH BOUND ON THE COLORADO RIVER. V2 WAS DRIFTING SOUTHBOUND ON THE COLORADO WITH ENGINE TURNED OFF.  V1 WAS LOOKING BEHIND HIM AND CONTINUED NORTH BOUND.  V1 THEN STRUCK V2 ON THE STERN STARBOARD SIDE.  V1 AFTER COLLIDING WITH V2,FLIPPED OVER AND PROCEEDED ALONG THE STARBOARD SIDE OF V2.  BOTH PARTIES ON V1 WERE THROWN FROM THE VESSEL BUT DID NOT REQUEST ANY MEDICAL ATTENTION.  NO ONE WAS INJURED ON V2. 
  
  NO INJURIES REPORTED. 
  PROPERTY DAMAGE ONLY TO V2 
  
  OPERATOR OF V1 WAS CITED FOR FAILURE TO MAINTAIN PROPER LOOKOUT NRS 488.540 
  
  SEE NARRATIVE FOR MORE INFORMATION(14-0121)