JSC Sakhalinenergo reported operating results for the first quarter ended March 2013. The company generated 607.8 million kilowatt-hours (kWh) in the first quarter of 2013, compared to 638.6 million kilowatt-hours, 5% less than in the same period last year. Power stations and boiler plants put out 183,700 GCal of heat in the first quarter, compared to 203,400 GCal of heat, 9.7% less than in the same period last year.