Hot Metal Trench The working end of the blast furnace, where molten metal would flow like lava out of the furnace… a process called ‘tapping’. Similar Images ...based on the tags: circles, cranes, ditches, furnaces, graffiti, machinery, pipes... Park Insurance Agency is no longer in business, nor would you be able to dial that phone number. A sort of blender in a powder line building. The top vent had been removed, so leaves and light fall onto the teeth now. One leg of the headframe meets the hoist house. Two cranes are rusted in place. Spring melt flows down the rusty rock house. In the background is the frame for the shaft. Some guerilla art for passing drivers on I-94 East to enjoy. Artist unknown. Shells of mixing buildings. One of the only remaining pieces of equipment in the distilling room is this green control panel on a bridge suspended in the middle of it all. Part of the 1917 mill that had a little bit of roof left over it–most of this building was open to the sky. The birds loved it, but everything metal was quickly becoming too unstable to walk on. 2004. Machine Shop Loft.