RedactedNarrative: WCO was contacted about a boat accident on Pactola Lake in Pennington County SD. V1 was using a trolling motor to anchor in place in Jenny Gulch. Floating object (pontoon boat) was tied to 2 other vessels and drifting free. The drifting pontoon was approaching V1. O1 in V1 in order to try and avoid a collision pulled up the trolling motor. O1 then put V1 into gear and accelerated forward while turning. V1 then struck the pontoon. The pontoon did not suffer any damage. V1 received a puncture to the hull on the starboard side near the bilge outlet and damage to the rubber bumper track around the boat.