Construction of a new cogeneration plant at the Maimaksa production site of Sawmill 25 is called forth by necessity to: utilize wood waste remaining from the sawmill production; generate electric and heat energy independently; reduce emissions of harmful substances formed during burning of mazut and coal. In January 2008 the CHP boilers were started, in February 2008 the turbo-generator was put into operation too.Heat remaining after the turbo-generator is sufficient to cover the kilning capacities of the sawmill, as well as heating requirements of the sawmill’s premises. Main fuel for the CHP is wet bark, taken directly from the sawmill. In order to be able to produce maximum possible electric power (2200 kW), no matter what heat consumption is, an air cooler by “POLYTECHNIK” (Austria) was started (heat capacity – 9 MW) in December 2008. In 2010 the CHP produced 15 159 488 kWh electric power. The plan for 2011 is 15 465 600 kWh, which is 51.4 % of the total electric power requirements of the company. The main elements of CHP equipment are: furnaces for burning of wet bark with a hydraulic fire-grate air infeed, removal and smoke gases recirculation systems steam boilers with economizers, air heaters water treatment system for consumer heat supply automation system enables functioning of all the CHP working processes: fuel infeed, burning control, steam formation, ash removal, security system etc. steam turbo-generator with automation and security system main 6kV switchover with own switch-yard air cooler with auxiliary equipment Putting the project into operation has enabled to: include bark into the fuel balance of the company, stop bark dumping improve kilning quality reduce heat costs significantly reduce electric power costs shut down a separate coal boiler in transport depot replace electric power produced on heavy fuel with electric power produced on ecologically neutral biomass