On 26.04.2013 work started on the west portal of the Prado left tube. The tunnel alignment is beneath the towns of Vilar de Barrio and Saurreaus in Ourense province on the Madrid-Galicia high-speed line. The left tube is 7,628.8 m-long and 52 sq m section, driven using NATM techniques with 142.3 m at the portals in cut/cover. The construction of the right tube is part of another contract. The tubes will be connected by crosspassages. Click es/45 for tunnelbuilder archive. Visit www.adif.es. 18/13.