RedactedNarrative: On July 25, 2020 at approximately 11:45AM, V1 and V2 were fishing on Lake Francis Case at Big Bend Dam near Fort Thompson, South Dakota. This is in Lyman County, South Dakota. V1 was stationary facing east and O1 preparing to take off downstream. V2 was stationary facing south and O2 preparing to take off towards the face of the dam. O1 stated, "I looked all directions and the coast was clear." V1 had P1 sitting in a seat in the front of the bow obstructing O1's view. O2 stated, "I looked around, I saw the other guy sitting there, so I took off." O1 increased speed to take V1 on plane for approximately 40-50 feet. O2 increased speed slowly for approximately 25-30 seconds. At that time, V1 and V2 collided. Injuries reported included V1P2 whiplash, V1P3 pain in right wrist, and V2P1 shoulder pain. No further information at this time.