BBT SE terminates Brenner Base Tunnel contract with ARGE H51 consortium, Austria November 3, 2020 | Europe Company News BBT SE, the developer of the Brenner Base Tunnel (BBT) project, has terminated the EUR966 million contract with the ARGE H51 consortium for the construction of the 18-km-long lot H51 (Pfons-Brenner se... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password