RedactedNarrative: V1 launched the boat and was able to start the motor before it pushed away from the dock.  The boat motor failed shortly after the 2 occupants  launched the boat and the boat drifted down stream into the front barge of a fleet of 2 barges and the tugboat Tigre.  The barge was moored to the east river bank just about 119 yds from the Hamburg boat landing.  The boat  capsized after impact and the passengers went into the water & were swept under the barge.  The Barges & tugboat are owned by the Dubuque Barge & fleeting Service Company.  The Owner/Operator had just purchased the boat the day before.  When V1 drifted into the front of the barge, the boat was perpendicular with the bank yet when it collided with the barge, the edge of the boat went under water & flipped them out as the boat capsized.  Both individuals went into the water & the Operator bumped/hit his head all along the underside of the barge before he came out downstream.  The Witness picked him up in another boat & they both started looking for the victim.  Neither individual was wearing a life jacket.  The body was recovered 10 days later downstream in Missouri.