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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

Midwest ISO and Southwest Power Pool File Tariff with FERC

LCG, November 5, 2002Midwest Independent System Operator and the Southwest Power Pool (SSP) plan to instate a combined tariff in order to do away with rate pancaking in electricity transactions between service territories.

Midwest ISO, a Federal Energy Regulatory Commission-approved Regional Transmission Operator, and SPP have decided to adopt the combined tariff in order that wholesale energy customers such as utilities will benefit and that the energy markets in the region will be stabilized.
Midwest ISO and SPP assert that the combined tariff will preserve the zonal rate structure, long-term firm SPP service agreements, and states' rates currently on file under the SPP tariff, in addition to eliminating rate pancaking on transactions between the two organizations customers.

The combined tariff currently awaits approval by the FERC.

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