{"document":{"slug":"filing-20260918-5323","title":"Protest of Mississippi Public Service Commission et al. re Midcontinent Independent System Operator, Inc.'s 08/28/2026 filing","issued":"2026-09-18","accession":"20260918-5323","docket":"ER26-3650-000","group":"MISO filings","filer":"Mississippi Public Service CommissionArkansas Public Service Commission","kind":"filing","file":"sources/originals/20260918-5323_01.pdf","url":"https://elibrary.ferc.gov/eLibrary/filelist?accession_Number=20260918-5323","sha256":"331b0be8140b667173995823d0ea5ad3842ee6e82199c31844675e1fa93575fc","pages":4,"tokens":684,"emptyPages":[]},"pages":[{"page":1,"startToken":0,"endToken":320,"text":"1 \n UNITED STATES OF AMERICA \nBEFORE THE \nFEDERAL ENERGY REGULATORY COMMISSION \n \nMidcontinent Independent System Operator, \nInc. \n) \n) \n                           Docket No. ER26-3650-000 \n \n \nPROTEST OF THE SOUTHERN REGULATORS \n \nThe Mississippi Public Service Commission and the Arkansas Public Service Commission \n(together, the Southern Regulators) protest MISO’s1 August 28, 2026 filing to establish \ninterconnection reliability requirements for large loads.2  Southern Regulators support Entergy’s3 \nLimited Protest4 and request for relief and offer the following additional comments.5  \nFirst, the Filing provides only a general overview of interconnection requirements \napplicable to large loads. It lacks the specific detail needed to actually interconnect to the grid.  \nAbsent that detail, developers and the transmission owners are unable to design, purchase and \ninstall the correct equipment to operate large loads (e.g., refineries, data centers).  A general \ndescription is not enough.  And, in the absence of those requirements, developers and transmission \nowners run the risk and expense of installing equipment, consistent with good utility practices, \nonly to then replace that equipment at great expense after MISO later publishes the actual \nrequirements.  MISO’s approach is analogous to building a house based on a picture instead of \ntechnical drawings. \nSecond, when it finally develops the requirements, MISO unreasonably proposes to place \nthem in Business Practice Manuals (BPMs).  MISO can easily change BPMs with minimal or no \n \n1 Midcontinent Independent System Operator, Inc. (MISO). \n2 Midcontinent Independent System Operator, Inc., Interconnection Reliability Requirements for Large Loads, \nDocket No. ER26-3650-000 (filed Aug. 28, 2026) (Filing). \n3 Entergy includes Entergy Services, LLC. and its operating companies: Entergy Arkansas, LLC, Entergy Louisiana, \nLLC, Entergy Mississippi, LLC, Entergy New Orleans, LLC, and Entergy Texas, Inc. \n4 Limited Protest of Entergy Services, LLC, Docket No. ER26-3650-000 (filed Sept. 18, 2026) (Entergy Protest).  \n5 Southern Regulators file these comments pursuant to Rules 212 and 214 of the Federal Energy Regulatory \nCommission’s (FERC or Commission) Rules of Practice and Procedure. 18 C.F.R. §§ 385.212 and 385.214 (2026)."},{"page":2,"startToken":320,"endToken":553,"text":"2 \ninput from market participants. Any recommendation market participants do provide regarding a \nBPM is treated as a suggestion that MISO may ignore.  Developers and transmission owners have \nno recourse to challenge a BPM other than by filing a complaint at FERC.  These requirements \nwill impose significant costs on developers and transmission owners; changing the requirements \nwill further increase those costs.  As Entergy explained, the Rule of Reason mandates that these \nrequirements be placed in the Tariff where they are subject to FERC’s oversight to ensure they are \njust and reasonable.6 \nFinally, the remedy Entergy seeks – that MISO make a compliance filing that clearly \nidentifies these requirements and places them in the tariff – is fully within FERC’s authority.  \nConclusion \nConsistent with Entergy’s Limited Protest, the Southern Regulators ask that FERC \ncondition acceptance of MISO’s Filing by requiring MISO to file the specific interconnection \nrequirements in the Tariff, not in the BPMs. \n \n \n \n \n \nBarton Norfleet \nSpecial Counsel; Federal Energy Affairs  \nMississippi Public Service Commission  \n501 N. West Street, Suite 201-A  \nP.O. Box 1174  \nJackson, MS 39215-1174  \nPhone: (601) 961-5821  \nbarton.norfleet@psc.ms.gov  \n \n \nRespectfully submitted, \n \n/s/ William D. Booth  \n \nWilliam D. Booth \nOrrie A. Walsvik \nMichael Best & Friedrich LLP \n1000 Maine Avenue, S.W. \nSuite 400  \nWashington, D.C. 20024 \nPhone: (202) 747-9560 \nwdbooth@michaelbest.com \norrie.walsvik@michaelbest.com \n \nAttorneys for the Mississippi Public \nService Commission  \n \n6 Entergy Protest at 3-17."},{"page":3,"startToken":553,"endToken":602,"text":"3 \n  \n/s/ Bridgette Frazier  \nBridgette Frazier  \nLuke Kinder \nCommission Counsel  \nArkansas Public Service Commission  \n1000 Center Street  \nP.O. Box 400  \nLittle Rock, AR 72201-4314  \nTelephone: (501) 682-5816 \n(501) 682-5766  \nbridgette.frazier@arkansas.gov  \nluke.kinder@arkansas.gov \n \nAttorneys for the Arkansas Public Service \nCommission \n \nDated September 18, 2026"},{"page":4,"startToken":602,"endToken":684,"text":"CERTIFICATE OF SERVICE \nI hereby certify that I have this day served the foregoing document upon the parties designated \non the official service list for the above-captioned docket in accordance with the requirements of \nRule 2010 of the Commission’s Rules of Practice and Procedure. \nDated at Madison, Wisconsin on this 18th  day of September, 2026. \n \n \n \n \n \nRespectfully submitted, \n/s/ Orrie Walsvik \nOrrie Walsvik \nMichael Best & Friedrich LLP \n1 S. Pinckney Street  \nSuite 700 \nMadison, WI 53703 \nPhone: (608) 257-3055 \nOrrie.walsvik@michaelbest.com"}],"sections":[{"p":1,"at":0,"title":"Opening text","method":"opening text","endPage":2,"endAt":787,"startToken":0,"endToken":439},{"p":2,"at":787,"title":"Conclusion","method":"printed heading","endPage":4,"endAt":0,"startToken":439,"endToken":602},{"p":4,"at":0,"title":"CERTIFICATE OF SERVICE","method":"printed heading","endPage":4,"endAt":556,"startToken":602,"endToken":684}]}