RedactedNarrative: On October 3, 2015 at approximately 1357 hours I observed a boat that appeared to have ran aground a rocky shoreline on the east side of Wahweap Bay just outside of the Castle Rock Cut. The boat was almost entirely out of the water. There were no people at the scene. I notified dispatch and inquired if a boat accident had been reported on a Cobalt boat. National Park Service dispatch informed me there was no boat accident reported but at approximately 2200 hours dispatch received a call on a disabled vessel matching the description of the boat I gave. I informed dispatch it appeared to be a boat accident and I would investigate further. 
  
  Investigation: I called and spoke with subject about the incident. Subject told me he was out after dark in high seas heading back to Wahweap marina. Subject said he was following the buoy markers when he ran aground traveling approximately 16 miles per hour. No injuries were sustained to him or his passenger. Subject informed me he had made arrangements for Aramark Executive Services to recover the boat on Monday. I told Subject when it is recovered I would like to inspect the boat for damage. Subject said he would inform me when the boat came out of the water. After the phone conversation I beached my boat so I could inspect the boat at the scene. I observed minor damage to the hull of the boat and no propeller damage. I documented the damage I observed on scene by taking pictures. I climbed aboard and found no registration card or proof of insurance. I found the boat had a fire extinguisher and several life jackets onboard. I observed no damage to the interior of the boat. 
  
  On October 4, 2015 at approximately 0800 hours I received a phone call from Subject informing me Aramark Executive Services were retrieving his boat this morning very soon. At approximately 0900 hours I met subjects at the Wahweap boat ramp. They were cleaning the outside of the boat. I documented the damage of the boat with pictures. There was some gel coat damage, in some areas down to the fiberglass. The port side there was some minor fiberglass damage where the initial impact took place. I lowered the outdrive I observed a small amount yellowish oil leaking from above the cavitation plate. The outdrive raised and lowered without any other issues. I climbed under the boat and documented the damage, scratches on the hull from bow to stern and a small section exposing the fiberglass layer. I asked Subject what happened and what were the conditions of the water. Subject said it was high winds of 15-20 mph and seas of 2-3 feet (his estimate) and after clearing the wakeless buoys in the Castle Rock Cut he made a sharp turn and began to head toward a channel marker near Wahweap marina. Subject struck the rocky shore at 15 knots and called dispatch to let them know they had run aground. Subject said he downplayed the incident and requested no help, both individuals spent the night camped out on the scene. No injures were sustained in the crash and they did not report any new injuries when I spoke with them. Subject said when the boat was back on the water it would not start and it was taking on water. Subject suspected a broken or damaged gasket on the outdrive possible the gamble. I had both individuals fill out witness statements. I asked Subject if he was on any prescriptions He replied he was taking some for arthritis, I asked if caused drowsiness or if it would impair his driving, he replied no. I asked Subject if he had any alcohol on the day of the accident he replied no. I collected the witness statements and gave Subject a name and phone number of who to contact in order to retrieve a copy of the accident report.