It's not clear exactly what kind of ship loader you're looking for. They come in a wide range of building styles, and sizes. Here are five US terminal elevators which handle both railcars and watercraft.
Big Soo terminal, in Sioux City, IA, which mostly transfers between rail and river barges;
Bunge, Memphis TN, which also transfers between rail and river barges;
Bunge, Destrehan, LA, which transfers between rail and river barges, on the one hand, and ocean freighters on the other;
an older facility in Mobile AL which can be found in Google Maps at (30.715112, -88.042623); and
another older facility, this one in Duluth, MN, in Google Maps at (46.770035, -92.107759).
All five of the above can be closely approximated by built in assets, or assets on the DLS.
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