I found this on You-Tube while searching my favorite railroad, the Duluth Missabe and Iron Range. The ore docks are rarely used these days but fascinating to see in operation. The speed to load one of these beasties is impressive.
Ore trains are backed onto the docks on tracks four abreast. Legend has it one conductor assembled a train 4 cars too long and sent three of the cars to the bottom of the harbor!
Duluth and Two Harbors are rich in railroad displays and mining rail operations. Great place for railfans. The DM&IR is now owned by CN.
[youtube]http://www.youtube.com/watch?v=6uu2ssQK9x0&feature[/youtube]