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’. Related Similar Images ...based on the tags: circles, cranes, ditches, furnaces, graffiti, machinery, pipes... The water tower no doubt made good scrap after it hit the ground. I did not take the escape ladder to the surface, but I am told it pops up in the middle of a hill next to the missile silo doors. The roof of the elevator was partly lit naturally with six big skylights. The less electricity pumped into a grain elevator, the less chance of a grain dust explosion. The top floor of the Dominion Elevator. Acros 100 on 120. The factory was utterly vertical. Note the tiled floor between the bucket conveyors and an old mill. A colorful makeshift wall. 2004. Machine Shop Loft. Chutes connect the bottoms of the silos to a conveyor belt.