RedactedNarrative: OWNER OF THE BOAT WAS ATTEMPTING TO LOWER  THE ANCHOR CHAIN.  CHAIN BECAME TANGLED AND TWISTED.  AS THE VICTIM/OWNER WAS TRYING TO FIX THE CHAIN, IT RELEASED AND HIS THUMB WAS CAUGHT IN THE LINKS.  HIS THUMB WAS AMPUTATED FROM THE FIRST KNUCKLE.  VICTIM OPERATED THE HOUSEBOAT BACK INTO THE SLIP BEFORE BEING TREATED BY EMS.
NameOfBodyOfWater: Monroe Reservoir
NearestCityTown: Bloomington                   