Rehabilitation of the water reservoir ensures the flood protection in the Isar valley. The construction section comprises the construction of the seepage water tunnel as well as the access structures at both ends of the tunnel.

A first in the Netherlands - TBM drive in the city centre: Hubertus tunnel, the longest inner-city road tunnel in the Netherlands, completes the Northern “Randweg” of The Hague.

1,700 m above sea level: In the Linthal Project 2015 the inclined tunnel with an incline of 24 % compensates an altitude difference of 900 m in the high mountains of Switzerland.