Operator drove vessel 1 downstream towards construction site with two stationary barges working on the E.J. and E. Railroad Bridge.  Vessel 1 made a sharp turn and capsized.  Vessel 1 did not have cowling on and became swamped.  Operator tried to retrieve swamped vessel 1, but could not.  Operator swam to shore and vessel 1 was swept in the current downstream under the construction barge.
Morris                        