HydroOGK, which unites about 50 hydropower plants across Russia with installed capacity of 25,000MW, said its revenues in the reporting period climbed 660% to 41.80 billion rubles ($1.8 billion), production costs grew 459% to 33.29 billion rubles ($1.4 billion), and pre-tax profit rose by 629% to 10.88 billion rubles ($461 million). (rian.ru)