Transmission

Subscribe to Transmission via RSS

On December 10, 2025, FERC accepted Southwest Power Pool, Inc.’s (SPP) proposed tariff revision to extend its existing day-ahead market dispatchable transaction model into the real-time balancing market (RTBM). The Commission found the proposal to be just and reasonable and not unduly discriminatory or preferential, rejecting protests that raised concerns…

On November 25, 2025, FERC accepted the Midcontinent Independent System Operator, Inc.’s (MISO) proposal to expand the number of interconnection requests MISO may study under its temporary, fast-tracked generator interconnection process. FERC concluded that the proposal will help ensure interconnection customers are able to interconnect to the MISO transmission system in a reliable, efficient, and timely manner.

On September 18, 2025, FERC accepted in part and denied in part the Maine Office of Public Advocate’s (“Maine OPA”) request for eight New England Transmission Owners (“Identified NETOs”) to answer information requests as part of the Information Exchange Period within their Formula Rate Protocols (“Protocols”). Three of the Identified NETOs must now answer Maine OPA’s information requests regarding procedures for evaluating the need for asset condition projects; all Identified NETOs must provide information on their respective procedures for ensuring asset condition projects are not placed in service before such projects are needed.

In the latest chapter in a long-running saga dealing with certain credits for transmission upgrades in the Southwest Power Pool (SPP), on September 18, 2025, FERC directed SPP to submit a compliance filing addressing certain aspects of SPP’s proposed plan (Refund Plan) for unwinding credit payment obligations assessed by SPP.

On May 14, 2025, FERC accepted Southwest Power Pool, Inc.’s (“SPP”) proposed revisions to its Open Access Transmission Tariff (“OATT”) to modify its high priority transmission study planning process. SPP argued these changes will allow transmission studies to better address transmission issues identified by stakeholders by expanding the scope of such studies to allow for considerations beyond economic benefits and costs, such as short-circuit and dynamic stability. FERC accepted the proposed OATT revisions as just and reasonable, finding the revised process to satisfy the goals of FERC Order No. 890 and allow SPP’s studies to address the specific needs of stakeholders.

On April 29, 2025, FERC partially granted rehearing in the case of Cometa Energia, S.A. de C.V. (“Saavi”) against the California Independent System Operator Corporation (“CAISO”), finding a provision of CAISO’s Business Practice Manual for Reliability Requirements (“Business Practice Manual”) must be included in CAISO’s tariff under the “rule of reason,” as the provision significantly impacts rates and services. In its underlying complaint, Saavi argued that CAISO unlawfully terminated the deliverability status of its 181.5 megawatt generating unit (“Project”). In its rehearing order, FERC agreed that under the “rule of reason” CAISO should have reflected the deliverability status provision of its Business Practice Manual in its tariff, but FERC declined to reinstate the Project’s deliverability status citing concerns over reduced resource adequacy for other generating units.

On April 11, 2025, FERC issued Order No. 1920-B, which clarified and maintained key requirements from Order No. 1920-A regarding long-term transmission planning and cost allocation. FERC clarified that transmission providers are not obligated to plan for the long-term needs of unenrolled non-jurisdictional transmission providers, but voluntary arrangements are allowed. The order also upheld the requirement for transmission providers to include Relevant State Entities’ agreed-upon cost allocation methods in their compliance filings. Additionally, FERC sustained the consultation requirement with Relevant State Entities before amending cost allocation methods. Lastly, FERC declined to expand the definition of “Relevant State Entity” and rejected certain rehearing requests as procedurally barred. Overall, FERC explained that Order No. 1920-B reinforces the importance of long-term, forward-looking, and comprehensive transmission planning and cost allocation processes to meet the demands of the modern transmission grid. The order was approved by four Commissioners, with Commissioner See not participating.

On March 30, 2025, FERC approved revisions to Southwest Power Pool, Inc.’s (“SPP”) Open Access Transmission Tariff (“Tariff”) and Governing Documents to allow nine entities (“Expansion Members”) in the Western Interconnection to join SPP’s Regional Transmission Organization (“RTO”) as transmission-owning members (“RTO West”), on the condition that SPP submit compliance…

On February 10, 2025, Pluvia LLC (“Pluvia”) filed a petition for a declaratory order, asking FERC to clarify its jurisdiction to issue a preliminary permit for the construction, operation, and maintenance of transmission lines and other facilities to develop wholesale interstate transmission of electricity between Puerto Rico and the mainland United States.  In its petition, Pluvia proposes to purchase electricity from the interstate transmission system on the U.S. mainland, store energy in Storage As Transmission-Only Assets (“SATOA”) or other storage devices, and ship the stored energy as sea cargo to Puerto Rico.  Pluvia explains that, if approved by FERC, its proposal would establish an alternative to undersea cables as a basis for FERC’s Federal Power Act (“FPA”) jurisdiction in Puerto Rico.

On February 20, 2025, FERC denied Great Basin Transmission, LLC’s (“Great Basin”) request for two transmission incentives for Great Basin’s Southwest Intertie Project-North Transmission Line and associated upgrades to Great Basin’s existing One Nevada Transmission Line (together, the “Project”). FERC found that Great Basin did not demonstrate that the Project…