 Construction of the expansion was done from December 2004 through February 2005 by the Norwegian Directorate of Public Construction and Property , who contracted the job to AF Gruppen . About 700 tonnes ( 690 long tons ; 770 short tons ) of equipment was hauled to the base from the ice shelf . The base was prefabricated and only required the modules to be connected at site . New infrastructure included a new generator , emergency station , garage , provision stores , container ramps for equipment and fuel , and more laboratories . At the same time , the Norwegian Meteorological Institute established a meteorological station at Troll . 
