Lot 120 Main work on the safety tunnel: The Albula Tunnel I, which was put into operation in 1903, is to be converted into a safety tunnel. This includes the repair of the vault (masonry and/or rock, partly with shotcrete), the renewal of the drainage system (new pipeline and control shafts), the installation of a roadway (pavement), the construction of 2 new ventilation units around 200 to 350 m from the portal and adjustments to the extinguishing water system.

Lot 120 Main work on the safety tunnel: The Albula Tunnel I, which was put into operation in 1903, is to be converted into a safety tunnel. This includes the repair of the vault (masonry and/or rock, partly with shotcrete), the renewal of the drainage system (new pipeline and control shafts), the installation of a roadway (pavement), the construction of 2 new ventilation units around 200 to 350 m from the portal and adjustments to the extinguishing water system.