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As MISO’s (later changed to Midcontinent Independent System Operator) membership changed, the makeup of OMS did as well. In December 2013, OMS welcomed its five newest members from the south to achieve its current construct when the Entergy Region joined MISO.
Midcontinent Independent System Operator adding four new electric territories in December. The Midcontinent Independent System Operator (MISO) plans to integrate the operations of the transmission systems owned by four electric companies in the Gulf Coast region starting this December.
The Midcontinent Independent System Operator is a not-for-profit Regional Transmission Organization. MISO ensures reliable and least-cost delivery of electricity to 15 U.S. states and Manitoba, Canada. We manage 200,000 megawatts of power-generating resources for our members. We also manage 65,000 miles of high-voltage transmission lines.