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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 Gains Momentum Toward Market Opening

LCG, February 8, 2005--The Midwest Independent Transmission System Operator (Midwest ISO) announced that it has reviewed the final system tests and trials completed last week and will maintain its schedule to open April 1, 2005. The Midwest ISO plans to provide the Readiness Certification to operate the market to the Federal Energy Regulatory Commission (FERC) next week.

The implementation of the scheduled system cutover plan began on February 5 and is scheduled to run through February 20. All market systems are to be used for mandatory trials until financially binding activities start with the opening of the market on April 1.

The Midwest markets were previously scheduled to be launched on March 1, 2005. On January 27, the Midwest ISO announced the one-month delay, which was stated to be in response to stakeholder requests.

In August 2004, the FERC conditionally accepted the Midwest ISO's proposed Open Access Transmission and Energy Markets Tariff (TEMT), which includes Day-Ahead and Real-Time energy markets that use centralized, security-constrained, economic dispatch and LMP-based pricing similar to the operations of PJM, the New York ISO and ISO-New England.

The Midwest ISO covers more than 96,000 miles of high voltage transmission lines located in 15 states and one Canadian province. The implementation of the TEMT will alter the market design across a wide region that extends from eastern Montana through the upper Midwest - including Manitoba - and south to parts of Kentucky and Missouri. Once the TEMT is launched, the FERC's Standard Market Design, with LMP-based pricing, will be in use across the northern half of the Eastern Interconnect.

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