About MISO The Midcontinent Independent System Operator (MISO) is a 501(c)(4) not-for-profit organization with responsibility for ensuring the reliability of the high-voltage electric transmission system to deliver low-cost energy. MISO began providing reliability coordination and other services in December 2001, and is one of the ten Independent System Operators (ISOs) in North America. MISO manages the largest power system in North America in terms of geographical scope, serving about 42 million people across all or parts of 15 states, stretching from the Canadian border to the Gulf of Mexico. MISO's energy markets are among the largest in the world, with more than $29.9 billion in annual gross market charges. MISO also serves as the reliability coordinator for MISO entities in these 15 states and one Canadian province. Currently, the MISO region contains about 66,000 miles of high-voltage transmission assets with an aggregate value of approximately $38 billion, as well as 175,000 megawatts of electricity-generating capacity. MISO does not own any of these assets. Instead, with the consent of its asset-owning members and in accordance with its FERC-regulated tariff, MISO exercises functional control over the region’s transmission and generation resources with the aim of managing them in the most reliable and cost-effective manner possible. MISO North Eagan, MN MISO Central Carmel, IN MISO South Little Rock, AR MISO’s reliability footprint and locations of regional control centers. 16
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