selective catalytic reduction (SCR) on its three units beginning with Unit 3 in 2002, Unit 2 in 2004, and Unit 1 in 2005. The installation of SCRs reduced nitrogen oxide () emissions by 90%. The cost of installing all three SCRs totaled $346 million. The construction of flue-gas desulfurization (FGD) equipment at Amos was a $1.3 billion project completed in 2010. The FGD equipment reduced the plant's sulfur dioxide () emissions by 95%. See also List of coal-fired power stations in the United States References External links Energy infrastructure completed in 1971 Energy infrastructure completed in 1972 Energy infrastructure completed in 1973 Coal-fired power stations in West Virginia Buildings and structures in Putnam County, West Virginia American Electric Power