Georgia Power to file decertification request for Plant Mitchell Unit 3 Georgia Power announced that it plans to file a request in 2014 with the Georgia Public Service Commission to decertify Unit 3 at Plant Mitchell in Albany, Ga. The company is also cancelling the previously proposed conversion of the coal-fired unit to biomass after extensive review and analysis deemed the conversion would not be cost effective for its customers. If the request to decertify the 155 megawatt unit is approved, it will be retired by April 16, 2015 – the compliance date of the United States Environmental Protection Agency's Mercury and Air Toxics Standards Rule. Georgia Power is in the midst of a significant transition to the company's generation fleet. As part of its 2013 Integrated Resource , the company received approval from the PSC to decertify and retire more than 2,000 MW of coal- and oil-fired generation at facilities across the state. Georgia Power is the largest subsidiary of Southern Company.