Photogrammetry of the TMB used in the South Switzerland side for the project Alptransit (Gothard train tunnel).
This engine was used to escavate two tunnels from the year 2002 to 2011.
First tunnel is 15Km long (2002/2006) : Bodio - Faido.
The second is 12 Km long (2007/2011) : Faido - Sedrun West.
Diameter of the tunnel : 9.43 m.