A loco and a flatcar are parked in the superstore site, on the narrow gauge line from the freight station Köln Bonntor to the tunnel building site. This line is used to bring the concrete segments for the lining (and other materials), the excavated ground is transported through the pipes visible in the background (mixed with bentonite suspension). Picture taken on 22 July 2006. The startup of the new underground line is planned for 2010.
Digital photo by Christoph Schmitz (christoph.schmitz2@post.rwth-aachen.de)