Open call for tenders, deadline 26th April, 2007 for construction of a drainage tunnel to the Meuse river at Liege Bierset airport. The project includes a 2.5 km-long 2 m-diameter sewer, to be constructed using a pipejacking method. The sewer will be extended along motorway A604 on a length of 2.1 km. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=56382-2007, OJ S 46, or contact Société wallone des aéroports, Jambes, fax +32 81313504. E-mail dva@sowaer.be 11/07.