BANJA LUKA (Bosnia and Herzegovina), November 12 (SeeNews) â Bosnia's hydropower producer Hidroelektrane na Trebisnjici (HET) said it turned to a net profit of 3.1 million marka ($1.8 million/1.6 million euro) in the first nine months of 2018, from a 15.3 million marka loss in the like period of the previous year.