Crank on Dock 4 Exploring Dock 4 was a very different experience, since it was almost all metal. Related Similar Images ...based on the tags: brown, gears, grates, heights, ice, rusty, silos, snow, staircases... A huge steel tank, one of several left over, left over from either the Ashland Oil or Allied Chemical periods. Fantastic brick graffiti piece by a Duluthian in 1933! Is the stick drawing of a horse? Feel free to weigh in. Spare firebox bricks palleted on the second floor, is if it was going to be repaired. An old handcart sits next to a rotting elevator. The fences helped discourage patients from throwing themselves down the stairs. This building was an office and lounge for engineers. It is also demolished. It’s a small world… look at it. The oldest part of this mill had a wooden roof that rotted away long ago. Slowly, rust is dulling the edge on every cog left behind. This is a great example of a combination rock house; the silos below used to fill trains with ore dropped from mine cars pulled to the top of the structure.