Negotiated invitation to tender, deadline 18.11.2013, for renewal of 903 m-long Pforzheimer twin-track tunnel on Karlsruhe-Muehlacker line and backfilling of old tunnel using construction spoil. Duration of contract 09.05.2014 to 30.03.2020. Further information from Birgit Brauer, DB AG, in Stuttgart, tel +49 71120924040, fax +49 71120923690, e-mail birgit.brauer@deutschebahn.com. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=363224-2013. Ref. n. 13TEI03158. 44/13.