BBT SE terminates Brenner Base Tunnel contract with ARGE H51 consortium, Austria November 3, 2020 | Europe 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