Open invitation to tender, deadline 21.06.2011, for structural engineering retrofit of two-lane Laermschutz tunnel on A33 Osnabrueck-Bielfeld including application of fire resistant lining, surface protection, and installation of crosspassages. Contract starts 01.08.2011 for completion 08.01.2013. Time limit for receipt of requests for documents or for accessing documents: 01.06.2011. Further information from Herrn Schmitz, NLStBV GB in Osnabrueck, tel +49 541503-721, fax -779, e-mail Postelle@nlstbv-os.niedersachsen.de. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=146613-2011. 19/11.