1,262m

long

second longest tunnels built in Spain

Construction for this tunnel took place between 2004 and 2009. The project consisted of the construction of twin tunnels with a diameter of 8.5 m and a length of 10.67 km.  The project was completed in March 2009.

The project consisted of the construction of of twin tunnels with a diameter of 8.5 m and a length of 10.67 km, of which 7.67 km were excavated using tunnel boring machines, and 3 km using conventional methods.

General Information

  • Location: León - Asturias, Spain
  • Contract type: Construction
  • Infrastructure: Construction of twin tunnels with a diameter of 8.5 m and a length of 10.67 km, of which 7.67 km were excavated using tunnel boring machines, and 3 km using conventional methods
  • Year of project completion: 2009

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