Snaking Stack A winding flue between the ovens for Furnace 6, capped with sketchy catwalks. Related Similar Images ...based on the tags: black&white, catwalks, dark, furnaces, heights, pipes, rusty, valves... The Sun Rooms, or Common Rooms, reminded me of the Panopitcon turned inside-out. Don’t know what’s heavier… the bricks or shadows. The pipes in the boiler would be full of water, so the heat in the furnace. Harsh rail yard lighting throws shadows of broken windows against the line of boilers. A huge steel tank, one of several left over, left over from either the Ashland Oil or Allied Chemical periods. A light-painted portrait of one of the few remaining carts that moved everything from fresh eggs to soiled laundry through the tunnels. A 5-minute exposure of the tunnel and stars, and even some of Duluth’s city lights bouncing off the clouds. A single off-camera flash in the tunnel gives the effect of an oncoming train. Looking at the concrete headframe from street level. Acros 100 in Pentax 67 Depending on the position of the valve, flour could be routed from the filtering process back into a mill.