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Independent regulatory commissions

Tri-State Generation and Transmission Association, Inc. Intervenes in Southwest Power Pool, Inc. Tariff Revisions

Strategic Insights

— 2 min read

Tri-State Generation and Transmission Association, Inc. ("Tri-State") has submitted a motion to intervene in the Federal Energy Regulatory Commission's (FERC) proceeding regarding Southwest Power Pool, Inc.'s (SPP) proposed revisions to Schedule 9 and Attachment L of the SPP Open Access Transmission Tariff. As a wholesale generation and transmission cooperative corporation headquartered in Westminster, Colorado, Tri-State operates on a not-for-profit basis and is a public utility subject to the Commission's jurisdiction under Part II of the Federal Power Act.

Key Takeaways:

  • Tri-State is a wholesale generation and transmission cooperative corporation headquartered in Westminster, Colorado, and operates on a not-for-profit basis.
  • Tri-State is a public utility subject to the Commission's jurisdiction under Part II of the Federal Power Act.
  • The proposed Tariff revisions would add Tri-State Zone 102 as an exception to the general applicability of Schedule 9 rates for Network Load outside of the SPP Region.
  • The Tariff revisions would also allow Zone 102 to retain the revenues associated with Zone 102 Network Customers' Network Integration Transmission Service ("NITS") serving Network Load outside of the SPP Transmission System.
  • Tri-State has a direct interest in the outcome of this proceeding, which cannot be adequately represented by any other party, and requests that the Commission grant its timely request to intervene with full rights as a party.
  • Over ten percent of Tri-State's Utility Member load is external NITS load due to the loads' location in the Public Service Company of Colorado (PSCo) and Public Service Company of New Mexico (PNM) Balancing Areas (BAs).
  • Tri-State requests that the Commission accept the Tariff revisions proposed in the Filing, which will allow for just and reasonable and not unduly discriminatory cost allocation for external Network Load related to Zone 102.
  • The complete document can be viewed at the FERC eLibrary website.

Statistics:

  • Over ten percent of Tri-State's Utility Member load is external NITS load due to the loads' location in the Public Service Company of Colorado (PSCo) and Public Service Company of New Mexico (PNM) Balancing Areas (BAs).
  • Tri-State Zone 102 is proposed to be added as an exception to the general applicability of Schedule 9 rates for Network Load outside of the SPP Region.

Sources:

  • 16 U.S.C. SSSS 824-824w
  • 18 C.F.R. SSSS 385.211 and 385.214 (2024)
  • Southwest Power Pool, Inc., Submission of Tariff Revisions Related to Schedule 9, Zone Exceptions, and Attachment L, Revenues Associated with External Network Load, Docket No. ER25-3298-000 (August 27, 2025)
  • COLO. REV. STAT. SS 7-55-101, et seq. (2019)
  • Tri-State Generation and Transmission Ass'n., 170 FERC P 61,224, order on reh'g, 172 FERC P 61,173 (2020)

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