RedactedNarrative: Operator began downstream travel after noticing river conditions were quickly deteriorating (dropping water level). O1 followed approximate route taken going upstream. Vessel prop bottomed out in a channel and stalled the engine. Tried to stay on course using paddles but was pulled into stronger current along the bank on a bend in the river. There were logs extending into the water from the shore and V1 nosed into one and swamped the vessel. The vessel was abandoned with no injuries (everyone was wearing a life jacket. Vessel was not recovered due to hazardous water conditions. No damage to the boat could be identified. Motor was submerged with boat and considered a total loss.