Electric Transmission America 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.

American Electric Power is one of the largest electric utilities in the United States. AEP 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.

MidAmerican Energy Holdings Company based in Des Moines, Iowa, is a global provider of energy services. Through its energy-related business platforms – PacifiCorp, MidAmerican Energy Co., CE Electric UK, Kern River Gas Transmission Company, Northern Natural Gas Company, and CalEnergy – MidAmerican provides electric and natural gas service to more than 6.9 million customers worldwide. MidAmerican Energy Holdings Company subsidiaries PacifiCorp and MidAmerican Energy Company own and operate more than 18,000 miles of electric transmission lines.

American Transmission Company owns, operates, builds and maintains the high-voltage electric transmission system serving portions of Wisconsin, Michigan, Minnesota and Illinois. Formed in 2001 as the nation’s first multi state transmission-only utility, ATC has invested $2 billion to improve the adequacy and reliability of its infrastructure. ATC now has $2.75 billion in total assets, more than 9,400 miles of transmission lines and 510 wholly or jointly owned substations. The company is a member of the Midwest ISO regional transmission organization and provides nondiscriminatory service to all customers, supporting effective competition in energy markets without favoring any market participant.

Exelon Corporation is one of the nation’s largest electric utilities with nearly $17 billion in annual revenues. The company has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. Exelon distributes electricity to approximately 5.4 million customers in northern Illinois and southeastern Pennsylvania and natural gas to 486,000 customers in the Philadelphia area. Exelon is headquartered in Chicago and trades on the NYSE under the ticker EXC.

MidAmerican Energy Company, a subsidiary of MidAmerican Energy Holdings Company, provides electric service to more than 725,000 customers and natural gas service to more than 707,000 customers in Iowa, Illinois, Nebraska and South Dakota. It is headquartered in Des Moines, Iowa.

NorthWestern Energy is one of the largest providers of electricity and natural gas in the Upper Midwest and Northwest, serving approximately 661,000 customers in Montana, South Dakota and Nebraska.

Xcel Energy is a major U.S. electricity and natural gas company with regulated operations in eight Western and Midwestern states. Xcel Energy provides a comprehensive portfolio of energy-related products and services to 3.4 million electricity customers and 1.9 million natural gas customers through its regulated operating companies. Company headquarters are located in Minneapolis, Minn.