Fume Lines One level below where the cotton was nitrated, the fumes must have been powerful. This floor had several massive ventilation fans in its walls. Related Similar Images ...based on the tags: arrows, bokeh, grimy, orange, pipes, signs... It seems like this pipe was made to return dust to the collector in the main workhouse from the annex. Behind the main shaft is this familiar industrial sight… a running count of days since the last injury. Inside the Beulah elevator were all of the original notices and notices. These are instructions for filling rail cars with flour sacks. Fire doors separate the buildings. A twin-engine crew pushes full taconite cars onto Dock 6. The cornerstone of the building, in Latin. The mine was built with stone, wood, and steel. It’s in good condition. Labeling line elevator.