High-efficiency Natural Gas
SWEPCO's J. Lamar Stall Unit at Arsenal Hill, a 508-megawatt (MW) combined-cycle natural gas unit, began commercial operation in June 2010 in Shreveport, La. Combined-cycle plants generate electricity more efficiently and consume less fuel per kilowatt-hour of output than conventional gas-fueled generators. The Stall Unit generates electricity with a gas-fueled turbine and recovers exhaust heat from that process to produce additional electricity in a steam turbine.
Advanced Coal Technology
The John W. Turk, Jr. Power Plant in Fulton, Ark., is one of the cleanest, most efficient coal-fueled plants in the United States. The 600-megawatt (MW) facility began operation in December 2012 as the first "ultra-supercritical" unit in operation in the United States. Its advanced coal combustion technology uses less coal and produces fewer emissions, including carbon dioxide, than traditional pulverized coal plants. State-of-the art emission control technologies and the use of low-sulfur coal enable the Turk Plant to meet emission limits that are among the most stringent ever required for a pulverized coal unit. See fact sheet.
Additional Environmental Controls
Environmental retrofit projects were completed at five SWEPCO coal-fueled generating units between 2013 and 2016 — Flint Creek at Gentry, Ark.; Welsh Units 1 and 3 at Pittsburg, Texas; Pirkey at Hallsville, Texas; and Dolet Hills at Mansfield, La. Welsh Unit 2 was retired in 2016. The environmental controls were required to meet stringent U.S. Environmental Protection Agency regulations.