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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

Three More Firms Join Midwest ISO

LCG, July 31, 2000--The Midwest Independent System Operator said on Friday that its board had approved three new applications for membership. The ISO now has 16 transmission-owning members and 23 members who do not own transmission facilities.

Two transmission owners joining the Midwest ISO are Wisconsin Public Service Resources Corp. and American Transmission Co. A non-transmission owner, Calpine Corp. also signed up with the agency.

American Transmission Co. was formed earlier this year after the Wisconsin state legislaturepassed a law requiring the state's utilities to turn over their transmission assets to an ISO. The lawwas designed to ensure that access to the state's electric transmission system would remainindependent of individual utility control as the industry embraces deregulation.

Wisconsin Public Service Resources is the parent holding company for Wisconsin Public Service, a local utility. Calpine is a San Jose, Calif.-based independent power producer with operations in 27 states and Canada.

The Midwest ISO claims to be the nation's largest independent transmission system operator. It says that when it becomes fully operational next year utilities with more than 52,000 miles of transmission lines, 78,000 megawatts of electric generation, and about $8 billion in installed assets will be participating in the ISO.

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