Astaldi-led consortium to build Italian section of Brenner Base Tunnel March 18, 2016 | Europe Company News An Astaldi-led consortium comprising Ghella, Oberosler, Cogeis and CAP, has secured the EUR1-billion contract to conduct tunnelling works on the Italian side of the Brenner Base Tunnel (BBT) project. ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password