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OK — Power Infrastructure Updated January 2026

Oklahoma

Power generation, transmission, storage, and interconnection topics relevant to data center power supply in Oklahoma.

SPP Natural Gas Solar Wind Storage Data Center PPAs Queue Bottlenecks Transmission Constraints

Overview

Oklahoma is building out both gas and solar capacity to meet rising demand, anchored by Google’s Pryor data center and the growing SPP grid. OG&E and PSO are adding nearly 1 GW of combined-cycle and combustion turbine capacity, while Leeward Renewable Energy has announced over 700 MW of solar projects under long-term PPAs with Google. SPP’s interconnection queue holds 71 Oklahoma projects totaling 23.8 GW, signaling both opportunity and bottleneck risk for new generation.

Generation Projects

Natural Gas

OG&E and PSO are driving most of the near-term natural gas buildout.

  • OG&E Horseshoe Lake Units 11-12: Two GE 7FA.05 combustion turbines totaling 448 MW, approved in 2023 and planned for service in 2026.[1]
  • OG&E Tinker Units 1-2: Two GE LM6000 combustion turbines at Tinker Air Force Base near Oklahoma City, 88 MW total, also slated for 2026.[1]
  • PSO Green Country acquisition: PSO signed an agreement to purchase the 795 MW Green Country combined-cycle plant, with an application filed at the Oklahoma Corporation Commission in September 2024.[2]
  • OG&E future additions: OG&E’s 2025 IRP identifies Horseshoe Lake Units 13-14 and a 5-year capacity purchase agreement with the Tenaska Kiamichi combined-cycle plant as selected resources pending regulatory filings.[1]

Solar

Google’s long-term PPAs are anchoring a large Oklahoma solar portfolio.

  • Leeward/Google Mayes County Solar Portfolio: Construction is underway on 372 MW near Google’s Pryor data center, including Salt Branch (145 MW), Huckleberry (125 MW), and Mayes Solar (102 MW).[4]
  • Twelvemile Solar Projects 1-3: Leeward’s Twelvemile Solar 1 and 2 add 152.5 MW, and Twelvemile 3 adds 200 MW, bringing the total Oklahoma solar portfolio to 724 MW under Google PPAs.[4]

Wind

PSO’s 2024 IRP includes wind additions later in the decade.

  • PSO preferred plan: Adds 200 MW of new wind in 2032 and totals 753 MW of new wind resources across the full plan period.[2]

Transmission and Grid

SPP is planning new transmission lines and incorporating large load growth into its regional transmission plan.

  • Mathewson-to-Redbud 345 kV line: SPP selected Transource Oklahoma to build this 38.4-mile line at an estimated cost of $72 million, with completion expected in 2027.[5]
  • SPP ITP upgrades: SPP’s 2025-2026 Integrated Transmission Plan incorporates large load growth assumptions, including data center-scale additions, to get ahead of projected demand.[6]

Battery Storage

Both OG&E and PSO are planning utility-scale battery projects.

  • PSO preferred plan: Includes 200 MW of 6-hour storage in 2029.[2]
  • OG&E Black Kettle BESS: OG&E’s 2025 IRP identifies a 20-year capacity purchase agreement with the Black Kettle battery storage project, pending regulatory filings.[1]

Data Center Power Agreements

Google is the dominant data center customer in Oklahoma.

  • Google PPAs for Oklahoma solar: Leeward Renewable Energy’s Oklahoma solar portfolio is supported by long-term PPAs with Google, with output from the Mayes County projects delivered via firm transmission service to the Grand River Dam Authority for use at Google’s Pryor data center.[4]

Interconnection Queue

SPP’s queue reforms have not eliminated the backlog.

  • SPP GI backlog mitigation: SPP revised its generator interconnection procedures in January 2022 to address queue congestion, including changes to study timelines.[7]
  • Oklahoma projects in SPP queue: As of January 8, 2026, the SPP Active queue lists 71 Oklahoma projects in DISIS stage, totaling 23.8 GW of nameplate capacity — a massive cluster that implies long study timelines and higher upgrade costs for new generation.[8]
  • Large-load planning pressure: SPP’s ITP studies now explicitly incorporate large-load growth assumptions, a signal that transmission planning is catching up to demand from data centers and other high-load users.[6]

What to Watch

  • PSO Green Country acquisition: The Oklahoma Corporation Commission decision on PSO’s purchase of the 795 MW combined-cycle plant will determine whether that capacity comes online as planned.
  • SPP queue processing: With 23.8 GW of Oklahoma projects in the queue, any changes to SPP’s interconnection procedures or cost allocation could reshape timelines for new generation.
  • Google’s next PPAs: Google has committed to over 700 MW of Oklahoma solar; watch for any additional PPAs or expansions at the Pryor data center.

Sources

[1] Oklahoma Gas & Electric, “2025 Integrated Resource Plan” (prepared 2025), Oklahoma Corporation Commission filing, https://oklahoma.gov/content/dam/ok/en/occ/documents/pu/pud-reports-page/2025-oge-irp.pdf (accessed January 8, 2026).

[2] Public Service Company of Oklahoma, “2024 Integrated Resource Plan (IRP) Report” (2024), https://www.psoklahoma.com/lib/docs/community/projects/PSO_2024_IRP_Report.pdf (accessed January 8, 2026).

[3] U.S. Nuclear Regulatory Commission, “Oklahoma | NRC Facility Locator” (page last reviewed March 9, 2021), https://www.nrc.gov/info-finder/region-state/oklahoma.html (accessed January 8, 2026).

[4] Kelsey Misbrener, “Leeward Renewable Energy announces over 700 MW of Oklahoma solar for Google,” Solar Power World, January 15, 2025, https://www.solarpowerworldonline.com/2025/01/leeward-renewable-energy-announces-over-700-mw-of-oklahoma-solar-for-google/ (accessed January 8, 2026).

[5] Southwest Power Pool, “SPP board selects Transource to construct $72 million Oklahoma transmission project,” May 7, 2025, https://www.spp.org/news-list/spp-board-selects-transource-to-construct-72-million-oklahoma-transmission-project/ (accessed January 8, 2026).

[6] Southwest Power Pool, “SPP Update for Oklahoma Corporation Commission (June 2025)” (presentation), Oklahoma Corporation Commission, June 2025, https://oklahoma.gov/content/dam/ok/en/occ/documents/ajls/jls-courts/court-clerk/meetings/meeting-presentations-2025/SPP%20Update%20for%20Oklahoma%20Corporation%20Commission%20June%202025.pdf (accessed January 8, 2026).

[7] Southwest Power Pool, “Generator Interconnection” (webpage), https://www.spp.org/engineering/generator-interconnection/ (accessed January 8, 2026).

[8] Southwest Power Pool, “SPP GI Active Queue” (public queue table), https://opsportal.spp.org/Studies/GIActive (accessed January 8, 2026).