Huron-Portland Cement, Duluth Plant As photographed from a cement piling for Slip #3 poured in 1935, disconnected from land by erosion. How do I know the date? A pair of steamship engineers carved their initials and ranks into the wet cement! Similar Images ...based on the tags: bridges, ghost-signs, ice, lake-superior, pipes, shadows, signs, silos, sunsets... An original stencil-brushed sign. The only door into a large windowless concrete room, probably a storage bin. Kodak Portra 160/Mamiya 6. The chalkboard in the filtering plant reminds new visitors of the last day. The parking lot is in better condition than most of the complex. The left building is the lab. Vents in the boards over the windows helps prevent mold and animals from getting too crazy inside. 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 “Bentleyville” Christmas tree, part of a winter light show, in storage. The east portal, looking toward Nopeming Junction and away from the US Steel ruins and Duluth’s ore docks. Indianapolis’ beautiful downtown is in the distance, past the gas storage tank.