Westar Energy is the largest electric utility in Kansas, providing electric service to approximately 687,000 customers in the state. Headquartered in Topeka, Kan., Westar Energy has approximately 7,100 megawatts of electric generation capacity and operates and coordinates more than 35,000 miles of electric distribution and transmission lines.

Electric Transmission America, or ETA, is a joint venture between American Electric Power and a MidAmerican Energy Holdings Company subsidiary to build and own electric transmission assets. The joint venture is a 50-50 partnership to identify and invest in high-voltage transmission projects (345-kilovolt or higher) located in North America outside of the Electric Reliability Council of Texas, or ERCOT. View an overview video about ETA by visiting electrictransmissionamerica.com/about.

Berkshire Hathaway Energy, is a global provider of energy services to more than 11.5 million customers and end-users worldwide. BHE U.S. Transmission provides cost-effective, reliable transmission solutions for wholesale customers and is among the largest transmission owners in the country. For more information, visit www.bhetransmission.com.

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, more than a 40,000-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.

Southwest Power Pool is a group of 50 members serving more than four million customers across eight states of the Eastern Interconnection. Membership is comprised of investor-owned utilities, municipal systems, generation and transmission cooperatives, state authorities, wholesale generators, power marketers, and independent transmission companies. SPP was a founding member of the North American Electric Reliability Corporation in 1968, and was designated by the Federal Energy Regulatory Commission as a Regional Transmission Organization in 2004 and a Regional Entity in 2007.

Since 1998, SPP has provided independent security coordination and tariff administration, pursuant to a FERC-approved Tariff, across its service area with over 40,000 miles of transmission lines and over 50,000 megawatts of capacity resources.