{"document":{"slug":"filing-er27-432-spp-chills","title":"SPP proposes conditional large-load service revenue credits for its western zones","issued":"2026-11-06","accession":"20261106-5091","docket":"ER27-432-000","group":"SPP filings","filer":"Southwest Power Pool, Inc.","kind":"filing","file":"sources/originals/20261106-5091_01.pdf","url":"https://elibrary.ferc.gov/eLibrary/filelist?accession_Number=20261106-5091","sha256":"47b5cbd837e21ab9bac701d33016ae70982c54eafc6ece6fc5b4a972120a1568","pages":7,"tokens":2080,"emptyPages":[]},"pages":[{"page":1,"startToken":0,"endToken":335,"text":"November 6, 2026 \n \nThe Honorable Debbie-Anne A. Reese \nSecretary \nFederal Energy Regulatory Commission \n888 First Street, N.E. \nWashington, D.C.  20426 \n \nRe: \nSouthwest Power Pool, Inc., Docket No. ER27-____-000 \nSubmission of Tariff Revisions to Revise Schedule 15 and Attachment \nT for the SPP West Region \n \nDear Secretary Reese:  \n \n \nPursuant to Section 205 of the Federal Power Act (“FPA”), 16 U.S.C. § 824d, \nand Section 35.13 of the Federal Energy Regulatory Commission’s (“Commission”) \nRegulations, 18 C.F.R. § 35.13, Southwest Power Pool, Inc. (\"SPP\") submits revisions \nto Schedule 15 and Attachment T of its Open Access Transmission Tariff (“Tariff”)1 \nto add provisions for Conditional High Impact Large Load Service (“CHILLS”) for \npricing Zones in the SPP West Region, and to make other clarifying edits. \n \nSPP respectfully requests that the Commission accept the proposed revisions, \nfind the revisions just and reasonable, and set an effective date of February 1, 2027.  \n \nI. \nBACKGROUND \nA. \nSPP’s Regional Transmission Organization Expansion \n \nOn April 1, 2026, SPP expanded its Regional Transmission Organization \n(“RTO”) into the Western Interconnection.2 Specifically, the following utilities now \n \n1  \nSouthwest Power Pool, Inc., Open Access Transmission Tariff, Sixth Revised \nVolume No. 1.  References in this filing to \"Tariff\" refer to the version of SPP’s \nTariff currently in effect. \"Proposed Tariff\" refers to a version reflecting the \nrevisions proposed in this filing. All capitalized terms not otherwise defined in \nthis filing shall have the definitions assigned by the Tariff. \n2  \nThe revisions to effectuate the expansion were filed in Docket Nos. ER24-2184 \nand ER24-2185. Southwest Power Pool, Inc., Submission of Revisions to \nTariff, Bylaws, and Membership Agreement to Expand the Regional \nTransmission Organization into the Western Interconnection (Part 1 of 2), \nDocket No. ER24-2184-000 and (Part 2 of 2), Docket No. ER24-2185-000 \n(June 4, 2024). All citations to the “SPP Expansion Filing” are to the Part 1 \nfiling in Docket No. ER24-2184-000.The Commission accepted the revisions \nto SPP’s governing documents in a series of orders. Sw. Power Pool, Inc., 190"},{"page":2,"startToken":335,"endToken":690,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 2 \n \ninclude their transmission facilities in the Western Interconnection under SPP’s Tariff: \nBasin Electric Power Cooperative (“Basin Electric”); Colorado Springs Utilities \n(“CSU”); Deseret Generation and Transmission Cooperative; Platte River Power \nAuthority (“Platte River”); Tri-State Generation and Transmission Association, Inc. \n(“Tri-State”); Western Area Power Administration – Colorado River Storage Project \nManagement Center (“WAPA-CRSP”); Western Area Power Administration – Rocky \nMountain Region (“WAPA-RMR”); and Western Area Power Administration – Upper \nGreat Plains Region (“WAPA-UGP”) (collectively, the “Expansion Members”). Basin \nElectric, Tri-State, and WAPA-UGP were already Members of the SPP RTO and, with \nthe expansion of the SPP RTO, expanded their SPP RTO participation with the \ninclusion of additional transmission facilities in the Western Interconnection.  \n \nSPP established five new transmission pricing Zones in Attachment H of the \nTariff in order to effectuate the integration of the new transmission facilities: 100, 101, \n102, 103, and 104.3 SPP also added the “Incremental Market Efficiency Use” \nprovisions in the Tariff.4 In addition, SPP included a new Schedule 14 for the DC Tie \nAccess Charge.5 \n \nB.  \nRevisions to Add CHILLS \n \nOn February 10, 2026, SPP submitted revisions to the Tariff to add CHILLS to \nallow High Impact Large Loads (“HILL”) to be served with non-firm conditional \ntransmission service.6 The Commission accepted the provisions in a series of orders.7 \n \nC. \nPurpose of Filing \n \nAt the time of the CHILLS Filing, the new pricing Zones for the SPP West \nRegion had not yet been established in the Tariff. SPP submits this filing to include the \npricing Zones in Schedule 15 of the Tariff, and to also add CHILLS provisions to \n \nFERC ¶ 61,169 (2025); Sw. Power Pool, Inc., Letter Order, Docket No. ER24-\n2184-002 (July 11, 2025). \n3  \nSPP Expansion Filing at 91. \n4  \nSPP Expansion Filing at 52-53. \n5  \nSPP Expansion Filing at 48. \n6  \nSubmission of Tariff Revisions to Add Conditional High Impact Large Load \nService of Southwest Power Pool, Inc., Docket No. ER26-1323-000 (Feb. 10, \n2026) (“CHILLS Filing”). \n7  \nSw. Power Pool, Inc., 195 FERC ¶ 61,196 (2026); Sw. Power Pool, Inc., Letter \nOrder, Docket No. ER26-1323-002 (Oct. 26, 2026)."},{"page":3,"startToken":690,"endToken":986,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 3 \n \ncertain Rate Sheets for Point-To-Point Transmission Service under Attachment T of \nthe Tariff. SPP also proposes other clarifying edits to Attachment T. \n \nII. \nDESCRIPTION OF AND JUSTIFICATION FOR PROPOSED TARIFF \nREVISIONS  \n \nA. \nSchedule 15 \n \nIn the CHILLS Filing, SPP proposed a new Schedule 15, to establish charges \nfor CHILLS.8 SPP proposes to add pricing Zones 100, 101, 102, 103, and 104 under \nSection 1 of Schedule 15: \n \n \nZone 100: \nColorado Springs Utilities \n \nZone 101:  \nPlatte River Power Authority \n \nZone 102: \nTri-State G&T Association – West \n \nZone 103: \nColorado River Storage Project Zone \n \nZone 104: \nLoveland Area Projects Zone \n \nThese revisions are just and reasonable because they effectuate the intent of the \nCHILLS Filing already accepted by the Commission and will allow those entities in \nthe SPP West Region that take CHILLS to also pay for the use of the transmission \nfacilities located in those newly formed Zones in the SPP West Region. \n \nB. \nAttachment T \n \n \nAttachment T includes the rate sheets for Point-To-Point Transmission Service \nfor all applicable Transmission Owners under the Tariff. SPP proposes to revise the \nfollowing rate sheets. \n \n1. \nRate Sheets for CSU, Platte River, and WAPA-CRSP \n \n \nSPP proposes the following revisions to the rate sheets for CSU, Platte River, \nand WAPA-CRSP: \n \nPoint-To-Point Transmission Service and Conditional High Impact \nLarge Load Service Revenue Crediting for Point-To-Point Rates \nRates for Point-To-Point Transmission Service under this Attachment T \nshall reflect any adjustments for Schedule 7 and 8 revenues, and \nSchedule 15 revenues, and revenues distributed and allocated under \nAttachment AU, implemented in accordance with Section 34.1(2) of \nthis Tariff.  The rates, including any applicable adjustments for \nSchedule 7 and 8 revenues, and Schedule 15 revenues, and revenues \n \n8  \nCHILLS Filing at 29-30."},{"page":4,"startToken":986,"endToken":1350,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 4 \n \ndistributed and allocated under Attachment AU, shall be set forth in the \nRRR File.9 \n \nFirst, SPP adds a reference to Schedule 15 to appropriately adjust the Point-To-\nPoint Transmission Service Rates for any revenues received for Schedule 15 charges. \nThese proposed changes to add a reference to Schedule 15 revenues are just and \nreasonable because they will appropriately adjust the Point-To-Point Transmission \nService Rates for any revenues received for Schedule 15 charges. The changes are \nconsistent with the revisions to other rate sheets accepted by the Commission in the \nCHILLS Filing. \n \n \nSecond, SPP removes the references to Attachment AU revenues. Due to an \nadministrative error, SPP mistakenly included references to Attachment AU revenues \nin the rate sheets for CSU and Platte River in the SPP West Region. As explained in \nthe SPP Expansion Filing, Attachment AU revenues are allocated only to Transmission \nOwners in the SPP East Region.10 \n \n2. \nRate Sheets for Loveland Area Projects, SPP West Region \nAverage, and Tri-State G&T Association-West \n \n \nSPP proposes the following revisions to the rate sheets for Loveland Area \nProjects, SPP West Region Average, and Tri-State G&T Association-West: \n \nPoint-To-Point Transmission Service Revenue Crediting for Point-\nTo-Point Rates \nRates for Point-To-Point Transmission Service under this Attachment T \nshall reflect any adjustments for Schedules 7, and 8, 14, and 15 \nrevenues, and Incremental Market Efficiency Use revenues, and \nrevenues distributed and allocated under Attachment AU, implemented \nin accordance with Section 34.1(2) of this Tariff.  The rates, including \nany applicable adjustments for Schedules 7, and 8, 14, and 15 revenues, \nand Incremental Market Efficiency Use revenues, and revenues \ndistributed and allocated under Attachment AU, shall be set forth in the \nRRR File. \n \n \n9  \nSPP also includes a ministerial edit to the rate sheet for CSU to correctly reflect \nCSU’s Addendum number under Attachment H of the Tariff. \n \n10  \nSPP Expansion Filing at 56. See also Tariff, Attachment AU, Section I (“Such \nrevenues…shall be allocated to Transmission Owners in the SPP East Region \nbased on the estimated flow impacts resulting from energy transfers between \nMISO north and south subregions, as described in this Attachment AU.”)."},{"page":5,"startToken":1350,"endToken":1745,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 5 \n \nFirst, SPP adds a reference to Schedule 14 for the DC Tie Access Charge. The \nDC Tie Access Charge is defined as “[a] charge on a transmission reservation utilizing \na West DC Tie that sinks outside of the Zone where the West DC Tie is located.”11 The \nTransmission Customer is responsible for the DC Tie Access Charge determined in \nSchedule 14 of the Tariff. SPP adds this reference to the rate sheets where the DC Tie \nAccess Charge is applicable. \n \nSecond, SPP adds a reference to Schedule 15 to appropriately adjust the Point-\nTo-Point Transmission Service Rates for any revenues received for Schedule 15 \ncharges. The proposed changes to add a reference to Schedule 15 revenues are just and \nreasonable because they will appropriately adjust the Point-To-Point Transmission \nService Rates for any revenues received for Schedule 15 charges. The changes are \nconsistent with the revisions to other rate sheets accepted by the Commission in the \nCHILLS Filing. \n \nThird, SPP adds a reference to Incremental Market Efficiency Use revenues. \nThe Incremental Market Efficiency Use Charge is “[a] market recovery mechanism to \ncompensate West DC Tie Transmission Owners for the expected loss of life of certain \nWest DC Tie facilities due to increased utilization of the West DC Ties by the \nIntegrated Marketplace.”12 SPP adds this reference to the rate sheets where Incremental \nMarket Efficiency Use revenues are applicable. \n \nFourth, SPP removes the reference to Attachment AU revenues. Due to an \nadministrative error, SPP mistakenly included references to Attachment AU revenues \nrate sheets for Loveland Area Projects, SPP West Region Average, and Tri-State G&T \nAssociation-West in the SPP West Region. As explained in the SPP Expansion Filing, \nAttachment AU revenues are allocated only to Transmission Owners in the SPP East \nRegion.13 \n \nIII. \nEFFECTIVE DATE  \n \n \nFor all the reasons discussed in this transmittal letter, SPP requests that the \nCommission accept the proposed revisions to the Tariff to become effective February \n \n11  \nTariff, Part I, Section 1 – Definitions D. \n12  \nTariff, Part I, Section 1 – Definitions I. \n13  \nSPP Expansion Filing at 56. See also Tariff, Attachment AE, Section I (“Such \nrevenues…shall be allocated to Transmission Owners in the SPP East Region \nbased on the estimated flow impacts resulting from energy transfers between \nMISO north and south subregions, as described in this Attachment AU.”)."},{"page":6,"startToken":1745,"endToken":1998,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 6 \n \n1, 2027, which is not less than 60 days or more than 120 days prior to the submission \nof this filing as required by the Commission.14 \n \nIV. \nADDITIONAL INFORMATION \n \nA. \nDocuments submitted with this filing: \n \nIn addition to this Transmittal Letter, SPP provides with this filing Clean \nand Redlined Tariff revisions under the Sixth Revised Volume No. 1.15 \n \nB. \nService: \n \nSPP has electronically served a copy of this filing on all its Members, \nTransmission Customers and Market Participants. A complete copy of \nthis filing will be posted on the SPP web site, www.spp.org, and is also \nbeing served on all affected state commissions. \n \nC. \nRequisite agreements: \n \nThere are none.  \n \nD. \nCommunications \nCorrespondence and communications with respect to this filing should \nbe sent to, and SPP requests the Secretary to include on the official \nservice list, the following: \n \nJustin A. Hinton \nSenior Attorney \nSouthwest Power Pool, Inc. \n201 Worthen Drive \nLittle Rock, AR 72223 \nTelephone: (501) 482-2468 \njhinton@spp.org  \n \nTessie Kentner \nDirector & Associate General Counsel \nSouthwest Power Pool, Inc. \n201 Worthen Drive \nLittle Rock, AR 72223 \nTelephone: (501) 688-1782 \ntkentner@spp.org  \n \n14  \n18 C.F.R. § 35.3(a)(1). \n15  \nAttachment T for the WAPA-CRSP Zone contains language in italics, which is \npending before the Commission in Docket No. ER26-1136. SPP requests that \nthe Commission accept the proposed revisions to this tariff sheet subject to the \noutcome of hearing and settlement judge procedures in Docket No. ER26-1136."},{"page":7,"startToken":1998,"endToken":2080,"text":"The Honorable Debbie-Anne A. Reese \nNovember 6, 2026 \nPage 7 \n \nV. \nCONCLUSION \n \n \nFor the foregoing reasons discussed in this transmittal letter, SPP respectfully \nrequests that the Commission find the proposed revisions just and reasonable and not \nunduly discriminatory or preferential, and issue an order accepting the Tariff revisions \nwith an effective date of February 1, 2027. \n \nRespectfully submitted, \n \n/s/ Justin A. Hinton \nJustin A. Hinton \nSouthwest Power Pool, Inc. \n201 Worthen Drive \nLittle Rock, AR  72223-4936 \n  \nAttorney for  \nSouthwest Power Pool, Inc."}],"sections":[{"p":1,"at":0,"title":"Opening text","method":"opening text","endPage":1,"endAt":995,"startToken":0,"endToken":154},{"p":1,"at":995,"title":"I. BACKGROUND","method":"PDF bookmark","endPage":1,"endAt":999,"startToken":154,"endToken":155},{"p":1,"at":999,"title":"BACKGROUND","method":"printed heading","endPage":1,"endAt":1011,"startToken":155,"endToken":156},{"p":1,"at":1011,"title":"A. SPP’s Regional Transmission Organization Expansion","method":"printed heading","endPage":2,"endAt":1308,"startToken":156,"endToken":512},{"p":2,"at":1308,"title":"B. Revisions to Add CHILLS","method":"printed heading","endPage":2,"endAt":1586,"startToken":512,"endToken":557},{"p":2,"at":1586,"title":"C. Purpose of Filing","method":"printed heading","endPage":3,"endAt":220,"startToken":557,"endToken":722},{"p":3,"at":220,"title":"II. DESCRIPTION OF AND JUSTIFICATION FOR PROPOSED TARIFF REVISIONS","method":"PDF bookmark","endPage":3,"endAt":1047,"startToken":722,"endToken":853},{"p":3,"at":1047,"title":"B. Attachment T","method":"printed heading","endPage":3,"endAt":1051,"startToken":853,"endToken":854},{"p":3,"at":1051,"title":"Attachment T","method":"printed heading","endPage":5,"endAt":1914,"startToken":854,"endToken":1653},{"p":5,"at":1914,"title":"III. EFFECTIVE DATE","method":"PDF bookmark","endPage":6,"endAt":202,"startToken":1653,"endToken":1782},{"p":6,"at":202,"title":"IV. ADDITIONAL INFORMATION","method":"PDF bookmark","endPage":6,"endAt":233,"startToken":1782,"endToken":1785},{"p":6,"at":233,"title":"A. Documents submitted with this filing:","method":"PDF bookmark","endPage":6,"endAt":428,"startToken":1785,"endToken":1815},{"p":6,"at":428,"title":"B. Service:","method":"PDF bookmark","endPage":6,"endAt":710,"startToken":1815,"endToken":1862},{"p":6,"at":710,"title":"C. Requisite agreements:","method":"PDF bookmark","endPage":6,"endAt":759,"startToken":1862,"endToken":1868},{"p":6,"at":759,"title":"D. Communications","method":"PDF bookmark","endPage":7,"endAt":64,"startToken":1868,"endToken":2008},{"p":7,"at":64,"title":"V. CONCLUSION","method":"PDF bookmark","endPage":7,"endAt":68,"startToken":2008,"endToken":2009},{"p":7,"at":68,"title":"CONCLUSION","method":"printed heading","endPage":7,"endAt":576,"startToken":2009,"endToken":2080}]}