| Date |
Description |
| April 17, 2026 |
Public Comments from April 17, 2026 |
| April 13, 2026 |
Redacted Corrected PacifiCorp’s 2025 Integrated Resource Plan Update
Corrected PacifiCorp’s 2025 Integrated Resource Plan Update [HIGHLY CONFIDENTIAL] |
| April 10, 2026 |
Rocky Mountain Power’s Supporting Workpapers for the 2025 Integrated Resource Plan Update
RMP 2025 IRP Update Workpapers
RMP 2025 IRP Update Workpapers [CONFIDENTIAL] |
| April 6, 2026 |
Public Comments from April 6, 2026 |
| April 1, 2026 |
Public Comments from April 1, 2026 |
| March 31, 2026 |
Public Comments from March 31, 2026 |
| March 31, 2026 |
Cover Letter
Redacted PacifiCorp’s 2025 Integrated Resource Plan Update
PacifiCorp’s 2025 Integrated Resource Plan Update [HIGHLY CONFIDENTIAL] |
| March 11, 2026 |
Public Comments from March 11, 2026 |
| March 9, 2026 |
Public Comments from March 9, 2026 |
| March 6, 2026 |
Public Comments from March 6, 2026 |
| February 26, 2026 |
Public Comments from February 26, 2026 |
| February 13, 2026 |
Public Comments from February 13, 2026 |
| February 12, 2026 |
Public Comments from February 12, 2026 |
| February 11, 2026 |
Public Comments from February 11, 2026 |
| February 10, 2026 |
Public Comments from February 10, 2026 |
| February 9, 2026 |
Public Comments from February 9, 2026 |
| February 5, 2026 |
Public Comments from February 5, 2026 |
| February 3, 2026 |
Public Comments from February 3, 2026 |
| January 26, 2026 |
Public Comments from January 26, 2026 |
| January 23, 2026 |
Public Comments from January 23, 2026 |
| January 22, 2026 |
Public Comments from January 22, 2026 |
| January 21, 2026 |
Public Comments from January 21, 2026 |
| January 20, 2026 |
Public Comments from January 20, 2026 |
| January 16, 2026 |
Public Comments from January 16, 2026 |
| January 15, 2026 |
Public Comments from January 15, 2026 |
| January 13, 2026 |
Public Comments from January 13, 2026 |
| January 12, 2026 |
Public Comments from January 12, 2026 |
| January 8, 2026 |
Public Comments from January 8, 2026 |
| January 5, 2026 |
Public Comments from January 5, 2026 |
| December 24, 2025 |
Public Comments from December 24, 2025 |
| December 22, 2025 |
Public Comments from December 22, 2025 |
| December 15, 2025 |
Public Comments from December 15, 2025 |
| December 12, 2025 |
Public Comments from December 12, 2025 |
| December 1, 2025 |
Reporter’s Transcript, Re: October 29, 2025 Public Witness Hearing |
| November 25, 2025 |
Reply Comments from the Division of Public Utilities |
| November 25, 2025 |
PacifiCorp’s Reply Comments |
| November 25, 2025 |
Joint Reply Comments of Utah Clean Energy & Southwest Energy Efficiency Project |
| November 25, 2025 |
Reply Comments of Western Resource Advocates |
| November 25, 2025 |
Sierra Club’s Reply Comments on PacifiCorp’s 2025 Integrated Resource Plan |
| November 24, 2025 |
Public Comments from November 24, 2025 |
| November 18, 2025 |
Public Comments from November 18, 2025 |
| November 17, 2025 |
Public Comments from November 17, 2025 |
| November 13, 2025 |
Public Comments from November 13, 2025 |
| November 6, 2025 |
Public Comments from November 6, 2025 |
| November 3, 2025 |
Public Comments from November 3, 2025 |
| October 29, 2025 |
Public Comments from October 29, 2025 |
| October 29, 2025 |
Recorded Live Stream of Public Witness Hearing Held on October 29, 2025
Sign-In Sheet for Public Witness Hearing Held on October 29, 2025 |
| October 28, 2025 |
Public Comments from October 28, 2025 |
| October 27, 2025 |
Public Comments from October 27, 2025 |
| October 23, 2025 |
Public Comments from October 23, 2025 |
| October 21, 2025 |
Public Comments from October 21, 2025 |
| October 20, 2025 |
Public Comments from October 20, 2025 |
| October 15, 2025 |
Order Granting Intervention of the Interwest Energy Alliance |
| October 14, 2025 |
Public Comments from October 14, 2025 |
| September 26, 2025 |
Comments of Utah Clean Energy |
| September 26, 2025 |
Comments from the Office of Consumer Services |
| September 26, 2025 |
Joint Comments of Utah Clean Energy & Southwest Energy Efficiency Project |
| September 26, 2025 |
Comments from the Division of Public Utilities
DPU Attachment A – RMP DR Response Set 1 |
| September 26, 2025 |
Initial Comments of the Utah Association of Energy Users
UAE Exhibit 1 – IRP Guidelines Order
UAE Exhibit 2 – Rocky Mountain Power’s Responses to Data Requests Referenced in UAE Comments |
| September 26, 2025 |
Redacted Sierra Club’s Opening Comments on PacifiCorp’s 2025 Integrated Resource Plan
Sierra Club’s Opening Comments on PacifiCorp’s 2025 Integrated Resource Plan [CONFIDENTIAL]
Sierra Club Workpapers for Exhibit 1 |
| September 26, 2025 |
Initial Comments of the Interwest Energy Alliance |
| September 26, 2025 |
Interwest Energy Alliance’s Petition to Intervene and Notice of Appearance |
| September 26, 2025 |
Initial Comments of Vote Solar |
| September 25, 2025 |
Initial Comments of Western Resource Advocates
WRA Exhibit 1 – 2025 IRP First Feedback Form
WRA Exhibit 2 – Post-IRP Draft Corrections and Refinements
WRA Exhibit 3 – PacifiCorp’s Responses to WRA Data Requests
WRA Exhibit 4 – PacifiCorp’s Response to Sierra Club Data Request 2.2 |
| August 7, 2025 |
Appendix A, Re: Sierra Goodridge for Utah Clean Energy |
| July 22, 2025 |
Recorded Live Stream of Technical Conference Held on July 22, 2025 |
| July 21, 2025 |
Rocky Mountain Power’s Presentation for the July 22, 2025 Technical Conference |
| July 3, 2025 |
Office of Consumer Services’ Comments Regarding Technical Conference Agenda Proposed by Rocky Mountain Power |
| July 3, 2025 |
Division of Public Utilities’ Comments on Proposed Agenda |
| July 3, 2025 |
Utah Clean Energy’s Comments Regarding Technical Conference Agenda Proposed by PacifiCorp, Doing Business as Rocky Mountain Power |
| July 3, 2025 |
Comments of the Utah Association of Energy Users Regarding Rocky Mountain Power’s Proposed Agenda for the July 22, 2025 Technical Conference |
| July 2, 2025 |
Western Resource Advocates’ Comments Regarding RMP’s Proposed Technical Conference Agenda |
| June 24, 2025 |
Rocky Mountain Power’s Proposed Agenda |
| June 10, 2025 |
Order Granting Intervention of Utah Clean Energy |
| May 27, 2025 |
Public Comments from May 27, 2025 |
| May 19, 2025 |
Appendix A, Re: Laura Burford for Sierra Club |
| May 16, 2025 |
Public Comments from May 16, 2025 |
| May 15, 2025 |
Appendix A, Re: Jennifer Eden, Josh Craft, Kevin Emerson, Logan Mitchell, Sarah Wright, Jenn Bodine, and Lauren Barros for Utah Clean Energy |
| May 15, 2025 |
Petition for Leave to Intervene of Utah Clean Energy |
| May 1, 2025 |
Appendix A, Re: Matthew Gerhart for Sierra Club
Certificate of Service |
| April 28, 2025 |
Order Granting Intervention of the Utah Association of Energy Users |
| April 28, 2025 |
Order Granting Intervention of Sierra Club |
| April 28, 2025 |
Order Granting Intervention of Western Resource Advocates |
| April 22, 2025 |
Appendix A, Re: Stacy Tellinghuisen, Erin Overturf, and John Nielsen for Western Resource Advocates |
| April 21, 2025 |
Appendix A, Re: Edward Burgess, Jordan Ahern, and Maria Roumpani for Sierra Club
Certificate of Service |
| April 16, 2025 |
Scheduling Order, Notice of Technical Conference, and Notice of Public Witness Hearing |
| April 16, 2025 |
Rocky Mountain Power’s 2025 Integrated Resource Plan Supporting Information
RMP Appendix A – Load Forecast
RMP Appendix D – Demand Side Management
RMP Appendix F – Flexible Reserve Study
RMP Appendix G – Plant Water Consumption Study
RMP Appendix H – Stochastic Methodology and Stimulation Results
RMP Appendix I – Capacity Expansion Results
RMP Appendix K – Capacity Contribution
RMP Appendix N – Energy Storage Potential Evaluation
RMP Appendix O – Washington Clean Energy Action Plan
RMP Appendix P – Oregon Clean Energy Update
RMP Chapter 1 – Executive Summary
RMP Chapter 5 – Reliability and Resiliency
RMP Chapter 6 – Load and Resource Balance
RMP Chapter 7 – Resource Options
RMP Chapter 8 – Modeling and Portfolio Evaluation
RMP Chapter 9 – Modeling and Portfolio Selection Results
RMP Chapter 10 – Action Plan
RMP Attachment 1 – Input Assumptions
RMP Attachment 2 – IR-LT
RMP Attachment 3 – IR-ST Cost Summary
RMP Attachment 4 – ItR-ST Cost Summary
RMP Attachment 5 – SR-ST Cost Summary
RMP Attachment 6 – File Mapping and Descriptions |
| April 15, 2025 |
Appendix A, Re: Isaac Orr and Mitchell Rolling for the Utah Office of Energy Development |
| April 15, 2025 |
Rocky Mountain Power’s 2025 Integrated Resource Plan Confidential and Highly Confidential Supporting Information
RMP Appendix A – Load Forecast [CONFIDENTIAL]
RMP Appendix F – Flexible Reserve Study [CONFIDENTIAL]
RMP Appendix H – Stochastic Parameters [CONFIDENTIAL]
RMP Appendix K – Capacity Contribution [CONFIDENTIAL]
RMP Appendix N – Energy Storage Potential Evaluation [CONFIDENTIAL]
RMP Appendix P – Oregon Clean Energy Update [CONFIDENTIAL]
RMP Chapter 1 – Executive Summary [CONFIDENTIAL]
RMP Chapter 6 – Load and Resource Balance [CONFIDENTIAL]
RMP Chapter 7 – Resource Options [CONFIDENTIAL]
RMP Chapter 9 – Modeling and Portfolio Selection Results [CONFIDENTIAL]
RMP Attachment 1 – Input Assumptions [CONFIDENTIAL]
RMP Attachment 2 – IR-Max.of.Units [CONFIDENTIAL]
RMP Attachment 3 – IR-ST Cost Summary [CONFIDENTIAL]
RMP Attachment 4 – ItR-25I.IR.iLT.r21.CETA [CONFIDENTIAL]
RMP Attachment 5 – ItR-25I.IR.iLT.r21.OR [CONFIDENTIAL]
RMP Attachment 6 – ItR-25I.IR.iLT.r21.System [CONFIDENTIAL]
RMP Attachment 7 – ItR-25I.IR.iLT.r21.UIWC [CONFIDENTIAL]
RMP Attachment 8 – IR-ST Cost Summary [HIGHLY CONFIDENTIAL]
RMP Attachment 9 – ItR-ST Cost Summary [HIGHLY CONFIDENTIAL]
RMP Attachment 10 – SR-ST Cost Summary [HIGHLY CONFIDENTIAL]
RMP Attachment 11 – File Mapping and Descriptions [CONFIDENTIAL]
RMP Attachment 12 – File Mapping and Descriptions [HIGHLY CONFIDENTIAL] |
| April 11, 2025 |
Appendix A, Re: Don Hendrickson and Phillip Russell for the Utah Association of Energy Users |
| April 11, 2025 |
Petition to Intervene of the Utah Association of Energy Users |
| April 11, 2025 |
Appendix A, Re: Rose Monahan and Thomas Phillips for Sierra Club |
| April 11, 2025 |
Sierra Club’s Petition to Intervene |
| April 10, 2025 |
Appendix A, Re: Sophie Hayes, Karl Boothman, Jessica Loeloff, Nancy Kelly, and Gwen Farnsworth for Western Resource Advocates |
| April 10, 2025 |
Petition for Leave to Intervene of Western Resource Advocates |
| April 7, 2025 |
Public Comments from April 7, 2025 |
| April 2, 2025 |
Appendix A, Re: Cindi Eckhardt for the Utah Office of Energy Development |
| April 2, 2025 |
Notices of Filing and Virtual Scheduling Conference |
| March 31, 2025 |
Rocky Mountain Power’s Cover Letter
2025 Integrated Resource Plan Volume I
2025 Integrated Resource Plan Volume II |
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