August 5 (SeeNews) - Bosnian hydro power plant group Hidroelektrane na Trebisnjici [BANJ:HETR-R-A] said on Friday it turned to a net loss of 1.56 million marka ($1.13 million/798,000 euro) in the first half of 2011 from a net profit of 523,000 marka a year earlier.