Dock One, on the right, is a pure gravity dock, where trains drop the ore (Taconite pellets, nowadays) into big containers (pockets) and the ships are loaded by opening chutes and letting gravity pull the ore into the boat. Dock Two is a gravity dock on the near side, but a conveyor-driven shiploader on the far side.

The thousand foot ships necessarily load at the shiploader, as the gravity docks aren't able to properly balance the loads on the wider vessels.

Taken from the lighthouse parking lot.

======================

Although this photograph's fairly sharp, it's unexpectedly grainy, perhaps because of the weather. Looks kinda like I scanned a postcard....