RedactedNarrative: At approximately 15:00 on 9/15/18 a 22'' Moomba wakeboard boat struck an unknown submerged object approximately 1/4 mile downstream from Cedar Grove marina on Norris Lake.  Based on statement he was traveling upstream at approximately 30 mph near the middle of the main channel of the lake when the vessel struck something causing the boat to turn sharply 180 degrees and stalling the engine.  He then realized the vessel was taking on water and proceeded to the shoreline in an attempt to avoid the vessel sinking.