RedactedNarrative: On May 24th V1 headed east along the spillway area of lock and dam 18. Operator & victim were both fishing approximately 20 feet from the dam while operator motored at a slow speed.  The Army Corps of Engineers maintains a closed zone of 150 feet below any lock and dam.  As V1 approached the first roller dam of the lock it began to spin in circles from the turbulent water created by the dam. V1 was pulled towards the roller dam and was capsized by the turbulent water.  V1 operator was able to climb onto some logs floating against the roller dam, while victim eventually drowned. Both individuals had alcohol in their system and the victim had drugs in his system.  Operator was charged with BWI.