RedactedNarrative: On June 6, 2018 at approximately 16:06 Lake Mead Interagency Communications Center reported sunk vessel north of Callville Bay Marina. LMICC reported a rental pontoon boat had all the passengers of the sunken vessel onboard. I responded and arrived at the marina at approximately 16:38. I contacted Callville Bay Marina employees who reported one of their rental boats, EBBTIDE 6, had sunk north of Callville Bay Marina and reported marina employees were currently on boat attempting to locate the vessel.  Marina employees reported a rental pontoon boat had picked up the passengers of the sunken vessel and were bring the passengers back to Callville Marina. Marina employees reported their employee operated boat had located the sunken vessel near the Narrows on Lake Mead. Marina employees reported they had the sunken boat in tow and were towing the boat back to the marina.
  
  At approximately 17:12 I contacted the occupants of the sunken boat at Callville Bay Marina and identified the operator of the vessel. OPERATOR reported to have smelled a bad smell coming from the engine and observed gas leaking out of the engine. OPERATOR reported he turned off the engine and attempted to restart the engine, but heard a "bad sound" coming from the engine and was unable to restart the engine. OPERATOR reported water began leaking into the vessel. OPERATOR reported the occupants of his boat attempted to bail the water out of the boat but were unsuccessful. OPERATOR and the occupants of the boat were transported by a bystander boat back to the marina. There were 8 occupants including OPERATOR on the boat. OPERATOR rented the boat from Callville Bay Marina. See attached rental forms and statements.
  
  Callville Marina employees towed the sunken vessel, a 21'' EBBTIDE Powerboat, to the Callville Launch Ramp and removed the vehicle from the water with a trailer. Marina employees reported the vessel had a possible mechanical failure or damage that caused water to leak into the boat. Marina employees later estimated the damage at $6000-$7000.Callvlle Marina employees later reported to be the vessel''s exhaust and bellows broke causing seals in the boat to break and let water in. The employees reported this was the cause of the vessel flooding. 
  I was clear of the scene at approximately 17:43.