AF has performed landfall tunnel system and riser packages at Kollsnes for A/S Norske Shell.
Tunnel system of 7.5 km for gas pipeline from treatment plant at Kollsnes to a connection point 200 m below sea level and 3.6 km offshore.
The contract also included the engineering and installation of qty. 2 450 ton riser packages. These where assembled in the shafts in connection with the tunnels, 165 m below sea level..
