TUNNELS OF PAJARES AVE MADRID - ASTURIAS (SPAIN)
> Piping length. 9.79 km.
> Inside diameter. 8.50 m.
> Waterproofing works and execution of an independent drainage system for waste and infiltration water.
*With a total length of 25 km, the tunnels of Pajares shall be the second longest tunnels in Spain and the seventh longest tunnels worldwide.
* They shall allow the passage trough the Cantabrian Mountains, reducing current route from 83 km to 50 km.