I know this is a unusual request and not really sure if its possible. I am suggesting a Lake Freighter bulk carriers ships thats for iron ore, limestone, grain, salt, coal, cement, gypsum, sand, slag and potash. Which would be great for some people that build custom routes with docks. There about 1000 ft × 105 ft or train simulators form of measurement its 304m × 32meters (Length ×Width)
They bring rail cars on top of the dock and would unload the product and in to the ships.