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December 5, 2025

Southwest Power Pool (SPP)

© RTO Insider 
Now a Mature Industry, Batteries Face a More Certain Future
Reports of the energy storage industry’s demise are greatly exaggerated, experts said during the American Clean Power Association’s annual Energy Storage Summit.
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Xcel Energy, AEP Plan to Invest $132B Through 2030
Xcel Energy and AEP both said during their quarterly earnings calls that they have increased their capital investment spend to meet increasing demand from large loads.
Camerafiend, CC BY-SA-3.0 via Wikimedia Commons
4 Entities Join NV Energy in Exiting WRAP, While Idaho Power Commits

Calpine, Eugene Water & Electric Board, PGE and PNM joined NV Energy in leaving the Western Resource Adequacy Program, while Idaho Power signaled its continued commitment.

MISO and SPP
30+ Projects Under Consideration in MISO-SPP Joint Tx Effort
MISO and SPP said they will study more than 30 project suggestions — some estimated to cost more than $1 billion apiece — in a four-state area in their pursuit of major, regionally cost-shared transmission projects.
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OMS Meeting Speakers Stress Importance of Transmission Planning
At a time when MISO’s long-term planning is under fire, the Organization of MISO States’ annual meeting featured speakers who vouched for the power of planning.
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Golden Spread to Appeal Rejection of Capacity Assessment Change to Board
Golden Spread Electric Cooperative will again appeal a stakeholder group’s rejection of a proposed tariff change that would pre-emptively determine the amount of load SPP's system can handle without requiring additional network upgrades.
Yes Energy using Yes Energy’s Infrastructure Insights data
How ISOs and RTOs are Addressing Large Load Growth
Data center-fueled demand growth continues to soar while reserve margins continue to shrink. Meanwhile, the timelines for building load versus building generation and transmission are wildly out of sync.
© RTO Insider LLC
SPP Stakeholders Trim $2.5B from 2025 Transmission Plan
SPP stakeholders have endorsed the RTO's 10-year transmission plan and some of its proposed 765-kV lines, trimming about $2.5 billion in costs from the portfolio.
Shutterstock
FERC Approves SPP’s New Provisional Load Process
FERC approved SPP’s tariff change to offer a provisional load interconnection process so the grid operator can study potential data centers and other large loads when there isn’t available power for the new facilities.
MISO, SPP
SPP Moving Forward with JTIQ Transmission Projects
SPP plans to continue working the Joint Targeted Interconnection Queue’s portfolio of five 345-kV projects on its seam with MISO, despite the U.S. Department of Energy’s threat to pull $464 million in previously granted funds.

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