Dust Funnels Dust explosions were a real risk for grain mills. These funnels helped to filter the air in the mill. Related Similar Images ...based on the tags: catwalks, chutes, funnels, ladders, pipes, windows... This floor of the workhouse had corkscrew conveyors–big augers–in the floor to move material around. Most of the walls that were metal were missing, leaving the concrete structure and open doors. The boiler doors are beautiful, and feature the name of the smelter and mine company. If you like these, check my article on the Mitchell Yards of Hibbing, MN. A few from atop the steam gauges along the western wall. The turbines were scrapped quickly after the plant closed, it seemed. Easier-to-demolish parts of the power plant were torched apart. Catwalks to nowhere meant lots of dead ends. Beside the shaft building are two fans on skids, indicating they were used underground. Part of the system below Dock 2. The mill itself is one giant room sectioned into levels–more catwalks than concrete. Here you can see the evaporators and have a sense for the miles and miles of pipes that zigzag through the plant. A colorful makeshift wall. A long exposure in the crane cab at sunset throws a bit of color into the bleak yellow glows between the windows and car shaker.