the 21st century, AEP's operations in Tennessee were part of a separate operating company, Kingsport Power Company. However, since the turn of the millennium, Kingsport Power's operations have been almost completely merged with those of Appalachian Power. While Kingsport Power still legally exists, the Kingsport Power name is almost never used anymore except for regulatory formality. AEP considers Appalachian Power to be the operating company in Kingsport. Wheeling Power, based in Wheeling, was long treated as a de facto part of Ohio Power, but is now treated as part of Appalachian Power. Indiana Michigan Power Indiana Michigan Power (I&M) serves northeastern and east central Indiana, including Muncie and Fort Wayne; and parts of north central Indiana and southwest Michigan, including South Bend, St. Joseph, Benton Harbor and Three Rivers. The Donald C. Cook nuclear power plant is located in I&M's territory. Kentucky Power Kentucky Power serves most of Eastern Kentucky, the area abutting the Appalachian Power service area, including communities of Pikeville, Hazard and Ashland. Kentucky Power headquarters is in Ashland and they maintain a government relations office in Frankfort. On October 26, 2021 the Liberty Utilities subsidiary of Algonquin Power & Utilities agreed to acquire AEP's Kentucky operations in a transaction valued at $2.8 billion (US). The purchase is expected to close in the second quarter of 2022, pending regulatory approval. Public Service Company of Oklahoma (PSO) PSO was one of the four CSW operating companies when CSW merged with AEP. Incorporated in 1913, PSO serves approximately 540,000 customers in eastern and southwestern Oklahoma. Its headquarters are in Tulsa. PSO has 4,269 megawatts of generating capacity and provides electricity to 232 cities and towns across a service area encompassing 30,000 square miles. In April 2014, Oklahoma Governor Mary Fallin signed into law an AEP-backed bill that would add a tax onto anyone in the state who adopted rooftop solar. This anti-solar legislation was headed by Rep. Mike Turner (Oklahoma politician) (R. Edmond), known for both his support of ending rooftop solar and legislation he introduced to end all marriage in the state. After partnering with AEP to pass the legislation, Rep. Turner suffered a failed federal congressional race. Southwestern Electric Power Company Often called SWEPCO, the Southwestern Electric Power Company serves most of western Arkansas, northwestern Louisiana, and northeastern Texas. Like PSO, it was one of the four CSW Operating Companies. Between 2013 and 2014, AEP, under subsidiary SWEPCO,