RedactedNarrative: At approx. 03:00 operator failed to see Island 1B on Norfork and grounded V1.  V1 was northbound when it impacted the island; V1 traveled 47.25 ft and then turned and went 26.5 ft before finally coming to rest on the island heading east/northeast.  Operator stated he knew there was an island in the area but it was very dark that night and he failed to see it.  He advised V1 was on plane at the time of the impact and was traveling approx. 40mph.  V1's occupants spent the night on the vessel until they flagged down a fisherman at approx. 08:00 that morning.  Occupant had suffered an injury when he fell onboard the vessel.
  
  Operator failed to notify us of the accident.
NameOfBodyOfWater: LAKE NORFORK
NearestCityTown: MOUNTAIN HOME                 