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Home My WebLink About20171109PAC to Staff 3rd Suppl WY-17 WPSC Set 4 1-8.pdfROCKY MOUNTAINPOWER ADIVISIONOFPACIFICORP 1407 W North Temple,Suite 330 Salt Lake City,Utah 84116 October 20,2017 Meridith Bell 2515 Warren Avenue,Suite 300 Cheyenne,Wyoming 82002 meridith.bell@wvo.gov(C) RE:Wyoming Docket 20000-520-EA-17 WPSC 4*Set Data Request (1-8) Please find enclosed Rocky Mountain Power's Responses to WPSC 4*Set Data Requests 4.1- 4.8.Also provided are Attachments WPSC 4.1,4.4,and 4.5.Provided on the enclosed Confidential CD is Confidential Attachment WPSC 4.6.Confidential information is provided subject to the terms and conditions of the protective agreement in this proceeding. If you have any questions,please call me at (307)632-2677. Sincerely, Stacy Splittstoesser, Manager,Regulation Enclosures C.C.:Lori L.Brand/WPSC lori.brand@wyo.gov (W) John Burbridge/WPSC john.brubride@wyo,gov(W) Michelle Bohanan/WPSC Michelle,bohanan@wvo.gov (W) Kara Seveland/WPSC kara.seveland@wyo.gov(W) Morgan Fish/WPSC morgan.fish@wyo,gov (W) Dave Walker/WPSC dave.walker@wyo.gv (W) Perry McCollom/WPSC (W) Abigail C.Briggerman/WIEC (C) Patti Penn/WIEC PP_enn@hollanhart om (W) Bob Pomeroy/WIEC (W) Thor Nelson/WIEC (W) Emanuel Cocian/WIEC etcocian hollanhart.com (W) Adele Lee/WIEC ACLee@hollandhart.com (W) Nik Stoffel/WIEC NSStoffel@hollandhart.com (C)(W) Christopher Leger/OCA christopher.leger@wyo.gov (C) Crystal J.McDonough/NLRAcrystal@medonoughlawlle.com (C) Lisa Tormoen Hickey/Interwest (C) 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.1 WPSC Data Request 4.1 Please provide any current Remedial Action Schemes (RAS)currentlyin effect for the Freeze Out,Foot Creek,Standpipe,or Platte Substation areas. Response to WPSC Data Request 4.1 The only Remedial Action Scheme (RAS)that is currentlyimplemented in the Platte - Standpipe/FooteCreek -Freezeout area is the Standpipe RAS.Due to the nature of the RAS scheme,it has been classified by Western ElectricityCoordinating Council (WECC) as a local area protection scheme (LAPS).The Standpipe LAPS is designed to prevent low voltage conditions on the 230 kilovolt (kV)system near Badwater and Spence substations followingthe N-1 loss of the Platte to Standpipe 230 kV line in conjunction with heavy output from wind generationfacilities in south-central Wyoming.The scheme trips wind generation at Foote Creek and High Plains. Respondents:Craig Quist /Robyn Kara Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.2 WPSC Data Request 4.2 If there are any RAS currentlyin effect as requested in question 4.1,please provide the number of times and dates the RAS has been enforced or enacted occurring since items approved in Docket 20000-428-EA-13 were placed into service. Response to WPSC Data Request 4.2 The Standpipe remedial action scheme,which has been deemed a local area protection scheme as described in the Company's response to WPSC Data Request 4.1,is in effect, but it has not been initiated to date. Respondent:Dustin Herrick /Craig Quist Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.3 WPSC Data Request 4.3 Please provide the number of times,dates,per unit voltage,and frequencies or any voltage or frequency deviations that fall outside NERC or WECC criteria,deviations of concern,or that are of note,occurring since the items approved in Docket 20000-428- EA-13 were placed into service. Response to WPSC Data Request 4.3 There have been no voltage or frequency deviations that fall outside of Western Electricity Coordinating Council (WECC)or North America Electric Reliability Corporation (NERC)criteria since the items approved in Docket 20000-428-EA-13 were placed into service. Respondent:Dustin Herrick Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.4 WPSC Data Request 4.4 Please provide shapefiles of the centerlines and the proposed ROW edges for the 230kV lines similar to those provided regarding the 500kV lines found in the Company Response to Commission Investigative Request 3.5. Response to WPSC Data Request 4.4 Please refer to Attachment WPSC 4.4,which provides two zip files in the requested format: Attach WPSC 4.4.l-Shirley Basin to Aeolus CL and ROW Attach WPSC 4.4.2-Aeolus to Standpipe CL and ROW Respondent:Todd Jensen /Stuart Smith Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.5 WPSC Data Request 4.5 Please provide all Right of Way and easement agreements the Company has obtained thus far for items in this Application.Please supplement this response and provide any future agreements as they are made. Response to WPSC Data Request 4.5 The Company holds a federal right-of-way(ROW)grant for an easement across public land,issued November 12,2013,a copy of which is provided as Attachment WPSC 4.5. The attachment contains relevant information from the full National Environmental Policy Act (NEPA)record of decision (ROD),which describe the ROW grant and legal decisions.Specifically,see pages 88 through 91 of the ROD and Appendix L,pages L-20 through L-35. The Company has recently started the ROW acquisition process for easements on private property,but no private easement agreements are currentlyin place.The Company is currentlyseeking options with landowners for future easement acquisition,and copies of option agreements will be made available to the Commission.The Company anticipates completion of the acquisition process in the first quarter of 2019,and a package of ROW agreements will be submitted to the Commission once they are complete. Respondent:Todd Jensen /Stuart Smith Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.6 WPSC Data Request 4.6 Please provide the plan and profile documents for the 230kV,345kV,and the 500kV lines for the proposed project when they become available.On any profile documents please show maximum sag and minimum sag if available. Response to WPSC Data Request 4.6 The Company has developed preliminary plan and profile drawings for the project, though these are subject to change due to ongoing tower micro-siting,tower development and other adjustments required as part of the final landowner and environmental processes.Please refer to Confidential Attachment WPSC 4.6.The Company anticipates a comprehensive plan and profile package to be available early summer 2018. Confidential information is provided subject to the terms and conditions of the protective agreement in this proceeding. Respondent:Todd Jensen /Stuart Smith Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.7 WPSC Data Request 4.7 What is the NESC loading criteria (wind,ice,concurrent,extreme)being used for the proposed transmission lines?If the criteria varies across the project,please provide a basic map showing the criteria being used. Response to WPSC Data Request 4.7 The followingNational Electrical Safety Code (NESC)loading criteria are being used for the project(s): 500 kilovolts (kV) NESC 250B Heavy District Loading from Aeolus to structure 218 NESC 250B Medium District Loading from structure 218 to Anticline NESC 250C Extreme Wind Loading across the entire line NESC 250D Ice and Concurrent Wind Loading across the entire line 345 kV NESC 250B Medium District Loading across the entire line NESC 250C Extreme Wind Loading across the entire line NESC 250D Ice and Concurrent Wind Loading across the entire line 230 kV NESC 250B Medium District Loading across the entire line NESC 250C Extreme Wind Loading across the entire line NESC 250D Ice and Concurrent Wind Loading across the entire line The parameters of each loading case follow: NESC 250B Heavy District Loading:0°F,½inch ice,4 pounds per square foot (psf) wind NESC 250B Medium District Loading:15°F,¼inch ice,4 psf wind NESC 250C Extreme Wind Loading:60°F,90 mph wind,no ice NESC 250D Ice and Concurrent Wind Loading:15°F,¼inch ice,50 mph wind Additionally,the blowout criteria is constant.The result varies as a function of applying criteria to the variable of span length.The Company does not have a map. Respondent:Todd Jensen /Stuart Smith Witness:Rick Vail 20000-520-EA-17 /Rocky Mountain Power October 20,2017 WPSC Data Request 4.8 WPSC Data Request 4.8 What is the maximum blowout or sway of the proposed transmission lines? Response to WPSC Data Request 4.8 The blowout varies dependingprimarily on the span length,using the average ruling span length on the 500 kilovolt (kV)will,using the National Electrical Safety Code (NESC) maximum wind loading for the area have a maximum blowout of 54 feet from the conductor position under no wind conditions.For the 230 kV transmission line the maximum blowout in an average ruling span is 51 feet. Respondents:Todd Jensen /Stuart Smith Witness:Rick Vail