Detailed design of Sotiello – Campomanes section of the León – Asturias high speed railway line. Subsection: La Robla – Pola de Lena (Pajares branch line). Section length: 4.9 km.

Construction of a 4.3 km railway section of the León – Asturias high speed railway line (north of Spain). It consists of a double-track line, with international gauge and a design speed of 300 km/h, electrified at 2×25 Kv and with an axle load of 22.5 tons. The alignment parameters are:  2.5% of maximum gradient and 7,500 m of minimum curve radius. The complex orography of the area and the abundant rainfall conditions required the design of two tunnels (1,004 and 753 m long) and three viaducts (578 m long). It includes ERTMS signaling system.


ADIF (Spanish Railway Authority)

Project Dates

2004 – 2006



Project Figures

Contract Value: 734,772 €