The Fehmarnbelt Fixed Link Project is one of the largest infrastructure projects in Europe. A 19 km broad crossing between Denmark and Germany served by ferries shall be connected with a bridge or a tunnel. The tunnel is the preferred solution, due to its lower risk profile. In any case a lot of high performance concrete shall be used. Construction is scheduled to start in 2014 and finalized in 2020. This paper presents some initial results of durability testing and discusses strategy for 120 years service life.