Blast Door II One of the many blast doors. Note the plunger to seal off the airflow in the event of an attack or accidental explosion. Related Similar Images ...based on the tags: blast-doors, green, grimy, rusty, steel... I included this image to illustrate the height of the headgrame and the distance between it and the hoist house. Of course, compared with the depth of the mine shaft, this distance is short. Near the old slag dump there are the remains of the pouring buckets that received the molten steel from the US Steel blast furnaces, filled to the brim with pig iron. They must be incredibly heavy! A little sheet metal box somehow made it back home. Looking down Pommenicher Straße from Gaststätte Rosarius, the monstrous machine about to devour the town bites at the ground. The pilot house, lit with the lights of Superior. The holes were for men to poke reluctant ore with long poles, with the hope that a lucky jab would let the load slide down into the boat below. Now they’re just traps. One of the old cooperage buildings is largely unchanged from when it was built. The raised section of the building houses a crane. When the Mitchell project is complete, I’ll miss the textures on the face of the boiler. The control room was used through the mid-1990s as the plant was used to stabilize the power grid.