Entergy's Transmission Organization consists of the employees and assets used to plan, operate and maintain Entergy's transmission system. The Entergy transmission system is comprised of the transmission systems of Entergy's operating companies (EOCs): Entergy Arkansas, LLC; Entergy Louisiana, LLC; Entergy Mississippi, LLC; Entergy New Orleans, LLC; and Entergy Texas, Inc. The Entergy transmission system is comprised of approximately 15,900 circuit miles of transmission lines operated at 69 kV to 500 kV and approximately 1,300 substations.The transmission system spans portions of Arkansas, Louisiana, Mississippi, Missouri and Texas, covering 114,000 square miles. This system is regulated by the Federal Energy Regulatory Commission (FERC) and retail regulators, including the Arkansas Public Service Commission, the Louisiana Public Service Commission, the Mississippi Public Service Commission, the City Council for the City of New Orleans and the Public Utility Commission of Texas.
The Entergy transmission system moves high voltage bulk electric power from generating plants of the EOCs and third parties across an interconnected system of transmission lines and substations. The power is delivered to wholesale customers such as municipalities and cooperatives, as well as to approximately 2.8 million retail customers. The system also delivers power directly to large commercial and industrial retail customers. These customers include refineries, chemical plants, oil and gas processing facilities, pumping stations and large manufacturing sites vital to the region and nation.
Entergy is a member of the Midcontinent Independent System Operator (MISO) regional transmission organization. MISO has functional control of Entergy's transmission facilities and performs top-down transmission planning in accordance with MISO's Open Access Transmission, Energy and Operating Reserve Markets Tariff (MISO Tariff). The MISO Tariff provides for the development of a comprehensive transmission expansion plan that meets both reliability and economic expansion needs for the entire MISO region.
The Entergy transmission system is part of the Eastern Interconnection, the network of interconnected transmission systems that move bulk power throughout the eastern half of the United States and eastern Canada. As a member of the SERC Reliability Corporation (SERC), Entergy is committed to serving its customers reliably across its interconnected grid of transmission lines and substations.
Disclaimer: This website is provided for the convenience of Entergy's customers served by the Entergy transmission system. Entergy shall not be liable for damage, loss, injury, or any other claims of whatever nature arising from the publication of the information at this site. Please review this page periodically to see if any enhancements or new features have been added.