Portugal court suspends Marao tunnel constructionConstruction of the twin-tube 5,655 m-long Marao motorway tunnel on the new Amarante-Vila Real highway in Portugal has been suspended following allegations by a local water company that excavation work will pollute the groundwater. Concessionaire Auto-Estrada do Marao and Infratunel, the construction consortium of Somague and MSF, are appealing the court decision. Visit tunnelbuilder archive pt/30 for project history since 2002. 03/10.