In this Nov. 13, 2012 photograph, workmen secure a steam drum on top of the heat recovery steam generator on the combine cycle at Mississippi Power's Kemper County energy facility near

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In this Nov. 13, 2012 photograph, workmen secure a steam drum on top of the heat recovery steam generator on the combine cycle at Mississippi Power's Kemper County energy facility near DeKalb, Miss. The plant, still under construction, is designed to use a soft form of coal called lignite in a gasification process to generate power. The project has come under legal challenge by the Mississippi Sierra Club. The environmental organization says the gasification technology is expensive and unproven. (AP Photo/Rogelio V. Solis) less