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SPP's Western Expansion Set for Implementation on April 1

LCG, March 13, 2026--The Southwest Power Pool (SPP) announced yesterday that leaders from the participating organizations voted unanimously to proceed as planned with expanding its regional transmission organization (RTO) services into the Western Interconnection. SPP sees the decision to proceed as planned as a strong signal of confidence as SPP and its partner utilities prepare for this key milestone, which will occur overnight between March 31 and April 1.

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Entergy Estimates Customer Savings of $5B from "Fair Share Plus" Data Center Agreements

LCG, March 6, 2026--Entergy yesterday announced approximately $5 billion in total savings for 2.3 million customers in Arkansas, Louisiana and Mississippi resulting from data center customer agreements in those states. Entergy, which completed its first data center customer agreement in 2024, projects the customer savings over the next 20 years and after the regulatory approval or acknowledgement of the public service commissions in those states.

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Industry News

MISO Ready to Open New Electricity Markets

LCG, February 17, 2005--The Midwest Independent Transmission System Operator (Midwest ISO) yesterday announced that it has filed Certificates of Operational and OrganizationalReadiness with the Federal Energy Regulatory Commission (FERC), signaling that it is ready and prepared to commence operations of the new markets on April 1.

In August 2004, the FERC conditionally accepted the Midwest ISO's proposed Open Access Transmission and Energy Markets Tariff (TEMT), with one of the conditions that the Midwest ISO certify its market readiness. The Midwest markets were initially scheduled to be launched on March 1, 2005; however, on January 27, the ISO announced the one-month delay, which was stated to be in response to stakeholder requests.

The new market design includes Day-Ahead and Real-Time energy markets, with centralized, security-constrained, economic dispatch and locational marginal pricing (LMP) similar to that used in northeastern markets, such as PJM, New York ISO and ISO New England.

The Midwest ISO service territory extends from eastern Montana through the upper Midwest - including Manitoba - and south to parts of Kentucky and Missouri. With the implementation of the TEMT, the FERC's Standard Market Design, with LMP-based pricing, will generally be in use throughout the northern half of the Eastern Interconnect.

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