Clyde’s Old Sign – (C)SUBSTREET This building had no identity issues. My chief regret was not spending more time documenting the ghost signs around the complex. Related Similar Images ...based on the tags: black&white, cables, ghost-signs, grass, long-exposures, power, signs... At first glance, I thought the center building was a hoist house because of the shape of the window. Now I think this was built as a warehouse and later used as a laboratory. This is the former air compressor house–one of them, at least–which turned steam power into air power to drive machinery across the production line. The guard shack protecting the Nike launch pad. For a short time, CN mounted flood lights atop the abandoned dock. A twin-engine crew pushes full taconite cars onto Dock 6. Looking up the tallest structure left at ACME. West Elevation of the Depot. Ektar 100/Mamiya 6 The UP gets a lot of snow, making exploring its old mines a special challenge in the winter. The snow is more than 6 feet deep in this picture, and firm enough to walk on. The St. Louis County Sheriff constantly patrols the property looking for trespassers.