Open invitation to tender, deadline 31.07.2012, for construction of twin-tube, 268 m-long twin-track cut/cover tunnel with 273.5 m dual access ramps in open cut, groundwater lowering by vacuum pumping, and associated works. Further information, specs and docs contact Stadt Dortmund, attn 69/BV-11, tel +49 2315024-786, fax –260, e-mail firstname.lastname@example.org to where tenders or requests to participate must be sent. Time limit for accessing documents 24.05.2012. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=129683-2012. 17/12.