I made two very large ore docks.
Two harbors Ore Dock kuid2:210518:300490:1
Two Harbors Ore Dock 2 kuid2:210518:300491:1
Both are interactive on top to unload cars on any of 4 tracks. They are not interactive to fill a barge or iron ore carrier in the water.
Both need some track added in surveyor to make at least 3 switches.
I also made a taconite plant some years ago which is interactive to fill cars with taconite. This is for TRS2004 but should go into TS2012 and TANE with a few easy changes.
Ben