lighterage

noun

1. (countable, uncountable)The fee paid for conveyance of goods on a lighter (flat-bottomed boat for carrying heavy loads across short distances).
2. (countable, uncountable)The act of unloading into a lighter, or of conveying by a lighter.

   “If Goods are to be brought Home to your own House, there are Charges for Weighage, Cranage, Porterage, Wharfage, Cartage, Lighterage, &c.”

   “1904, Joseph Conrad, Nostromo, New York and London: Harper & Brothers, Part 3, Chapter 1, p. 355, He has certainly organized the lighterage service of the harbor for the O.S.N. Company with great ability.”

   “Moreover, as the traffic would be mainly morning and evening rush-hour services, at other times of the day much lighterage across the river could be saved by using part of the new terminus for freight trafic.”