riverman

plural rivermen

1. A man who lives or works on a river.

   At last they lay alongside a little landing to which a houseboat was moored, occupied by a riverman whom Uncle Dick seemed to know.

   1922, Emerson Hough, The Young Alaskans on the Missouri

   1 more example

   It was curious to note the skill with which the veteran riverman allowed the current to carry his boats on their way, and the ease with which they were finally drawn in to the bank opposite the freight cars.

   1913, Harry Lincoln Sayler, On the Edge of the Arctic