RedactedNarrative: On 8/11/2016 I was advised of a damaged vessel that had arrived at Dangling Rope Marina around 16:39. The vessel and it's operator were safely at the marina and Operator stated he had suffered no injuries. He stated while entering Dangling Rope Canyon he did not notice the large shoal extending from the mouth of the canyon and ran into the shallow water striking his lower unit on the submerged rocks. 
  
  I found no evidence of impairment or reckless behavior and noted that Operator did not follow the navigational aids entering the canyon from the mouth and Buoy 42, but instead he cut the corner to enter the canyon placing himself over underwater hazards. I noted significant damage to the lower unit and possibly the hull, but the vessel was floating without taking on any water. Operator arranged a tow to Wahweap and required no further assistance.
  
  AZ required Reporting Info: Total time on incident/investigation reporting 2 hours.
  