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Home My WebLink About20180410PAC to Staff UT DPU Set 21 (1).pdf1407 W.North Temple ROCKY MOUNTAIN Salt Lake City,UT 84116 POWER A DIVISION OF PACIFICORP March 30,2018 Erika Tedder Division of Public Utilities 160 E 300 S,4th Floor Salt Lake City,UT 84114 dygdairequ_es1@ytalWLOY etedder@gahapv (C) RE:UT Docket No.17-035-40 DPU 21st Set Data Request (1) Please find enclosed Rocky Mountain Power's 1"Supplemental Response to DPU 21"Set Data Request 21.1.Also provided is Attachment DPU 21.1 16'Supplemental. If you have any questions,please call me at (801)220-2823. Sincerely, Jana Saba Manager,Regulation Enclosures C.c.:Dan Kohler/DPU dkoehler@daymarkea.com(C) Aliea Afnan/DPU aafnan@daymarkea.com (W) ibower@daymarkea.com (W) Dan Peaco/DPU dpeaco@daymarkea.com (C)(W) Kevin Higgins/UAE khiggins@eneravstrat.com (C) Neal Townsend/UAE ntownsend@energystrat.com(C)(W) Gary A.Dodge/UAE adodge@hjdlaw.com (C) Phillip Russell/UAE prussell@hidlaw.com (C) Philip Hayet/OCS phavet@ikenn.com (C) Béla Vastag/OCS bvastag@utah.gov(C) Kate Bowman/UCE kate@utahcleanenergy.org(C) Emma Rieves/UCE emma@utaheleanenergy.org(C)(W) Lisa Tormoen Hickey/Interwestlisahickey@newlawgroup.com (C) Mitch Longson/Interwest mloneson@mc2b.com (C) Nancy Kelly/WRAnkelly@westernresources.ore(C) Jennifer Gardner/WRA jennifer.gardner@westernresources.org(C) Penny Anderson/WRA pennv.anderson@westernresources.org (W) Peter J.Mattheis/Nucor pim@smxblaw.com (C) Eric J.Lacey/Nucor ejl@smxblaw.com (C)(W) William J.Evans/UIEC bevans@parsonsbehle.com Vicki M.Baldwin/UIECvbaldwin@parsonsbehle.com(W) Chad C.Baker/UIEC cbaker@parsonsbehle.com (W) 17-035-40 /Rocky Mountain Power March 30,2018 DPU Data Request 21.1 -1st Supplemental DPU Data Request 21.1 Refer to the Second Supplemental Direct Testimony of Rick Vail,lines 131-139.Please provide the updated studies concluding that the Company can interconnect up to 1,510 MW of incremental wind generationbehind the TOT4A/TOT4B constraint. 16*SupplementalResponse to DPU Data Request 21.1 Please see Attachment DPU 21.1 16'supplemental for the updated Aeolus West Transmission Path Transfer Capability Assessment study report (dated March 30,2018), which includes all power flow and dynamic stability studies that demonstrate the performance of the Wyoming transmission system,with the addition of the D.2 Project and associated 2017R RFP Short List resources.