RedactedNarrative: On Monday July 09, 2018 at about 1416 hours, I contacted subject by telephone reference a boating accident he wanted to report which took place on July 5, 2018 at about 1530 hours in the Agua Fria channel upstream from 1702 rock. 
  
  Upon contacting Subject he related to me he and his family were heading upstream from 1702 rock, pulling a subject surfing, in the normal traffic pattern approximately 35 yards away from shore when the boat hit an unmarked item below the surface of the water. This item which was not able to be seen caused the transom of the boat to lift out of the water high enough to expose the propeller to the surfer being pulled behind the boat. 
  
  He went on to tell me he was able to get the surfer back on board and noted there were no injuries to anyone else on board. The boat however was inoperable at this time and he hailed other boaters to come to their aid and tow them back to the boat ramp to remove the boat from the water. Subject stated when he put the boat on the trailer he was able to observe the propeller was destroyed and there were large gouges in the fiberglass hull. He estimated the size as being 2 1/2 wide by 2 1/2 long. He then transported the boat and trailer to Germane Watercraft to obtain estimates for the repairs needed. The other two subjects on board the watercraft during the incident were his son and his friend who also lives with them as they both finish their education at ASU. Subject2 was the surfer at the time of the incident and he also did not have any injuries to report.
  
  It should be noted operator has started to file an online claim with the Maricopa County Parks Service for the damages as he did not see any markings of and hazards at the time of the incident. He has also provided a few photographs of the damage and the area of occurrence, see attached.
  
  Nothing further.
  