RedactedNarrative: On 07/09/23 at 8:00 Am O1 and V1 was helping with the Pactola swim race on Pactola lake in Pennington County South Dakota. O1 launched the vessel from the south ramp. O1, beached his vessel on the south beach and launched at the beginning of the race. 
  
  O1 noticed that the swim deck was underwater. When O1 noticed this O1 started back for the south boat launch. The boat then lost all power and started to sink rapidly. O1 got assistance from the Johnson Siding Fire Department. 
  
  Johnson Siding towed V1 to the south ramp and beached it on shore. WCO’s noted that the plug was in when they got V1 on the trailer. WCOS could not see any obvious holes or cracks or failures that would lead to the boat sinking. Based on there observations WCO's believe that the incident occurred due to an unseen mechanical or equipment failure.
  
  WCO did not get the information of the 2nd occupant who was on scene.
  
NameOfBodyOfWater: PACTOLA LAKE
NearestCityTown: HILL CITY                     