AEP Names Riordan Vice President – Engineering Services

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COLUMBUS, Ohio, June 9, 2010 – Tim Riordan has been named vice president – Engineering Services for American Electric Power (NYSE: AEP), effective July 1.

Riordan will be responsible for all aspects of mechanical, civil and electrical engineering, design and development for the AEP generating fleet. He succeeds Mark Gray, who is retiring from the company June 30.

“Mark has provided extraordinary leadership during his 34 years at AEP, and we wish him the best in his retirement,” said Bill Sigmon, senior vice president – Engineering, Projects and Field Services. “We know that Tim’s expertise in plant engineering and his experience deploying new technologies will continue to be tremendous assets in his new leadership role.”

Riordan, 46, has worked his entire career at AEP. He has been director – Mechanical Engineering & Design since 2009, responsible for directing the mechanical engineering activities to support AEP’s generating fleet. He previously served as division manager – Engineering Services. From 2005 through 2008, Riordan was manager of New Generation and Design, responsible for engineering execution for the John W. Turk Jr. Power Plant in Arkansas. He served as manager of Steam Generation Equipment Engineering from 2003 to 2005 and was a senior engineer in Engineering Services from 1999 to 2003. Riordan joined AEP in 1987 at the Rockport Plant in Indiana and held various engineering and supervisory positions in maintenance, operations and performance. He received a bachelor’s degree in mechanical engineering from Bradley University in Peoria, Illinois.

American Electric Power is one of the largest electric utilities in the United States, delivering electricity to more than 5 million customers in 11 states. AEP ranks among the nation’s largest generators of electricity, owning nearly 38,000 megawatts of generating capacity in the U.S. AEP also owns the nation’s largest electricity transmission system, a nearly 39,000-mile network that includes more 765-kilovolt extra-high voltage transmission lines than all other U.S. transmission systems combined. AEP’s transmission system directly or indirectly serves about 10 percent of the electricity demand in the Eastern Interconnection, the interconnected transmission system that covers 38 eastern and central U.S. states and eastern Canada, and approximately 11 percent of the electricity demand in ERCOT, the transmission system that covers much of Texas. AEP’s utility units operate as AEP Ohio, AEP Texas, Appalachian Power (in Virginia and West Virginia), AEP Appalachian Power (in Tennessee), Indiana Michigan Power, Kentucky Power, Public Service Company of Oklahoma, and Southwestern Electric Power Company (in Arkansas, Louisiana and east Texas). AEP’s headquarters are in Columbus, Ohio.

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