Mine Cart Power Supports The orange bars were secured to the tunnel walls to support electric lines for the mine carts. Lower parts of the sand mines were allowed to flood. The water was perfectly still, and made for a mud so thick it could suck off your boots. Similar Images ...based on the tags: dirty, flooded, power, reflections, tunnels, water... Different doors for different vehicles, I would guess. White Pine Mine used tire-based vehicles, rather than track-based, making it pretty different than other mines I’ve been to. Before Portland-Huron Cement’s Duluth Plant was (mostly) demolished and (partly) turned into a hotel, the top of its silos gave a cinematic view of elevator row. The approach to the dock is rigidly geometric. I always thought its outline was beautiful against the lake that, by contrast, was always moving. Blending the explosive ingredients was dangerous. It is no wonder that the blending house had so many emergency slides. Wind blew taconite dust against the walls of these suspended control room, making even the glass appear to rust. Looking down the Gilman-Belden tram. Looking out at the abandoned neighborhood around the house. A small machine shop level. Here, the concentrated gold (and silver, and zinc, I would guess) would be loaded into trucks bound for the smelter.