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.