The officer was contact by an Iowa CPO and told that the vessel had been operator above lock & dam 19 on the Mississippi River.  The vessel's anchor slipped and the vessel began to drift toward the open lock and dam.  The operator of the vessel was unable to start the engine.  At the last moment the operator and passengers jumped out of the vessel and onto the dam.  The vessel went over the dam and dropped approximately 25 feet and sunk.  All efforts to contact the operator to complete the report have been unsuccessful.
Keokuk, Iowa                  