The Toronto mining company whose 15-year effort to open Europe’s biggest gold project has gone nowhere is preparing an international arbitration case against the Romanian government that would seek billions of dollars in damages.

Gabriel Resources is making plans for the case, which probably would be heard in Vienna in the second half of the year, as it starts to wind down its activities in Romania’s Transylvania region to conserve cash. About 400 employees, or 80 per cent, of Gabriel’s Romanian subsidiary, Rosia Montana Gold Corp. (RMGC), have been suspended at three-quarters pay. The company has said it may fire them in May “if there is no progress in the advancement of the project.”