Did a quick test on Back Country (RGC map) using their bulk and liquid barges. Put the transfer silo on a dock (FS Miners) and the boats recognise the loading points - hatches on the bulk barge even open automatically. So, you can transfer from the silo to a boat. Doesn't recognise the ability to unload from the boat back to a silo. Still cool for my map - I have a sell point in the river so can bulk load the boats and then take it up river to sell. The RGC grain (bulk) barge has 2 compartments - i was able to fill both compartments with different materials (sand and woodchips).
Thought i'd let you know. Great mod. Thanks for sharing. Currently installing a simple rail line in Back Country using the ZCA mods so looking forward to incoporating this into a logging / mining setting.