File:tunnel roof.JPG: Revision history

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4 August 2010

  • curprev 03:2303:23, 4 August 2010 FrancesA talk contribs 254 bytes +254 All the buildings at the Chicago MTS were connected by underground tunnels, used by the staff and service personnel. The roofs of the tunnels were cement walkways with decorated brick borders. There were windows at ground level for light and ventilation.