Rocky Mountain Power Depreciation Study Notice Filed April 23rd
Summary
Rocky Mountain Power filed a Notice of Depreciation Study with the Utah Public Service Commission on April 23, 2026 under Docket No. 18-035-36. The filing is the latest entry in a proceeding initiated in 2018 when the utility sought authority to change its depreciation rates effective January 1, 2021. The docket contains extensive documentation including testimony, orders, and hearing transcripts from the multi-year regulatory proceeding.
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GovPing monitors psc.utah.gov for new energy regulatory changes. Every update since tracking began is archived, classified, and available as free RSS or email alerts — 57 changes logged to date.
What changed
Rocky Mountain Power submitted a Notice of Depreciation Study on April 23, 2026 in Docket No. 18-035-36. This is the most recent filing in a long-standing Utah PSC proceeding regarding the utility's depreciation rates. The docket includes orders, testimony from multiple parties, and hearing records spanning from 2020 to 2026.
Affected parties should note that this is an informational filing within an ongoing rate proceeding. The original application sought rate changes effective January 1, 2021, and the docket remains active. Customers and stakeholders may review filings through the Utah PSC website.
Archived snapshot
Apr 24, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Docket No: 18-035-36
Electric Docket Year: 2018
Application of Rocky Mountain Power for Authority to Change its Depreciation Rates Effective January 1, 2021
For questions regarding documents not linked call 801-530-6716
| Date | Description |
|---|---|
| April 23, 2026 | Rocky Mountain Power’s Notice of Depreciation Study |
| October 2, 2025 | Rocky Mountain Power’s Notice of Depreciation Study |
| December 21, 2020 | Order |
| November 16, 2020 | Redacted Reporter’s Transcript, Re: November 3, 2020 |
Reporter’s Transcript, Re: November 3, 2020 [CONFIDENTIAL]
Reporter’s Transcript, Re: Public Comment Hearing from November 3, 2020
Redacted Reporter’s Transcript, Re: November 4, 2020
Reporter’s Transcript, Re: November 4, 2020 [CONFIDENTIAL]
Redacted Reporter’s Transcript, Re; November 5, 2020
Reporter’s Transcript, Re: November 5, 2020 [CONFIDENTIAL]
Redacted Reporter’s Transcript, Re: November 6, 2020
Reporter’s Transcript, Re: November 6, 2020 [CONFIDENTIAL]
| November 6, 2020 | Recorded Live Stream of Hearing on Phase I – Revenue Requirement in Docket No. 20-035-04 and Phase II in Docket No. 18-035-36 Held on November 6, 2020 |
| November 5, 2020 | Recorded Live Stream of Hearing on Phase I – Revenue Requirement in Docket No. 20-035-04 and Phase II in Docket No. 18-035-36 Held on November 5, 2020 |
| November 4, 2020 | Recorded Live Stream of Hearing on Phase I – Revenue Requirement in Docket No. 20-035-04 and Phase II in Docket No. 18-035-36 Held on November 4, 2020 |
| November 3, 2020 | Recorded Live Stream of Hearing on Phase I – Revenue Requirement in Docket No. 20-035-04 and Phase II in Docket No. 18-035-36 Held on November 3, 2020 |
| October 29, 2020 | Phase II Surrebuttal Testimony of Kevin C. Higgins on behalf of the Utah Association of Energy Users |
| October 29, 2020 | Rocky Mountain Power’s Phase II Surrebuttal Testimony |
| October 27, 2020 | Appendix A, Re: James B. Dalton for Western Resource Advocates |
| October 21, 2020 | Order Granting Motion, Amended Scheduling Order, and Amended Notice of Electronic Hearings |
| October 19, 2020 | Rocky Mountain Power’s Unopposed Motion to Consolidate the Hearing on Phase II of Docket No. 18-035-36 with Docket No. 20-035-04 |
| October 15, 2020 | Amended Notice of Electronic Hearings and Electronic Public Witness Hearing |
| October 5, 2020 | Phase I Rebuttal Testimony of Gary L. Smith for the Division of Public Utilities
Certificate of Service |
| October 5, 2020 | Phase II Rebuttal Testimony of Kevin C. Higgins on behalf of the Utah Association of Energy Users |
| October 5, 2020 | Rocky Mountain Power’s Phase II Rebuttal Testimony |
| September 23, 2020 | Notice |
| September 2, 2020 | Phase I Revenue Requirement Direct Testimony of Gary L. Smith for the Division of Public Utilities
Certificate of Service |
| September 2, 2020 | Phase II Direct Testimony of Kevin C. Higgins on behalf of the Utah Association of Energy Users |
| June 24, 2020 | Appendix A, Re: Callie Hood for Western Resource Advocates |
| June 19, 2020 | Redacted Rocky Mountain Power’s Phase II Direct Testimonies
Rocky Mountain Power’s Phase II Direct Testimonies [CONFIDENTIAL]
| June 9, 2020 | Scheduling Order, Notice of Technical Conferences, Notice of Hearings, and Notice of Public Witness Hearing |
| May 28, 2020 | Correspondence from Rocky Mountain Power, Re: Parties Proposed Stipulated Schedule
RMP Attachment A – Parties Proposed Stipulated Schedule |
| May 19, 2020 | Amended Notice of Telephonic Scheduling Conference |
| April 20, 2020 | Report and Order |
| April 15, 2020 | Reporter’s Transcript, Re: April 8, 2020 |
| April 3, 2020 | Rebuttal Testimony of Chad A. Teply for Rocky Mountain Power |
| April 3, 2020 | Testimony of Cheryl Murray on behalf of the Office of Consumer Services in Response to Sierra Club’s Opposition to the Settlement Stipulation
Certificate of Service |
| April 3, 2020 | Revised Surrebuttal Testimony of Kevin C. Higgins on behalf of the Utah Association of Energy Users |
| April 3, 2020 | Surrebuttal Testimony of Kevin C. Higgins on behalf of the Utah Association of Energy Users |
| March 31, 2020 | Notice of Change of Firm Name |
| March 30, 2020 | Direct Testimony of Ezra D. Hausman on behalf of Sierra Club |
| March 26, 2020 | Notice That Hearing Will Be Telephonic |
| March 20, 2020 | Direct Testimony of Nancy L. Kelly on behalf of Western Resource Advocates
Certificate of Service |
| March 20, 2020 | Direct Testimony of Jeffrey S. Einfeldt for the Division of Public Utilities
Certificate of Service |
| March 19, 2020 | Stipulation on Depreciation Rate Changes
RMP Attachments (Excel) |
| March 17, 2020 | Redacted Rocky Mountain Power’s Supplemental Information
Rocky Mountain Power’s Supplemental Information [CONFIDENTIAL]
RMP Workpapers 1 – Demolition Estimates: Colstrip 3 & 4 [CONFIDENTIAL]
| March 12, 2020 | Second Amended Scheduling Order and Notice of Hearing |
| March 12, 2020 | Second Motion to Amend Schedule
Certificate of Service |
| February 24, 2020 | Amended Scheduling Order and Notice of Hearing |
| February 21, 2020 | Motion to Amend Schedule
Certificate of Service |
| February 6, 2020 | Appendix A, Re: Gloria D. Smith for Sierra Club |
| January 22, 2020 | Appendix A, Re: Julian Aris, Jeremy Fisher, Ana Boyd, and Ezra D. Hausman, Ph.D. for Sierra Club |
| January 16, 2020 | Redacted Rocky Mountain Power’s Supplemental Information
Rocky Mountain Power’s Supplemental Information [CONFIDENTIAL]
RMP Workpapers 1 – Demolition Estimates [CONFIDENTIAL]
| December 16, 2019 | Scheduling Order and Notice of Hearing |
| December 11, 2019 | Scheduling Conference Sign-In Sheet |
| December 11, 2019 | Sierra Club’s Notice of Substitution of Counsel |
| Novemebr 29, 2019 | Notice of Scheduling Conference |
| November 25, 2019 | Motion to Lift Stay and to Set Procedural Schedule |
| February 21, 2019 | Sierra Club Notice of Withdrawal of Counsel |
| January 9, 2019 | Order Granting Motion to Stay |
| December 21, 2018 | Motion to Stay |
| December 10, 2018 | Rocky Mountain Power’s Second Supplemental Testimony of Steven R. McDougal
RMP Exhibit 1 – Depreciation Rate Comparison – Plant Balances as of December 2020
RMP Workpapers 1 – Depreciation Rate Comparison – Plant Balances as of December 2020 |
| December 3, 2018 | Order Granting Intervention of the Utah Association of Energy Users |
| November 21, 2018 | Order Granting Intervention of Sierra Club |
| November 21, 2018 | Order Granting Intervention of Utah Clean Energy |
| November 16, 2018 | Rocky Mountain Power’s Supplemental Filing
RMP Kobliha Workpapers 11 – Reconciliation of Gross Plant Balance at 12-31-2017 to the 2017 FERC Form 1
RMP Kobliha Workpapers 12 – Account Allocation of Terminal Net Salvage as of December 31, 2017
RMP Kobliha Workpapers 13 – Account Allocation of Terminal Net Salvage as of December 31, 2020
RMP Kobliha Workpapers 16 – Legal Asset Retire Obligation and Accounts as of 12-31-2017
RMP Teply Workpapers 14- Gas Demo [PROPRIETARY]
RMP Teply Workpapers 15- Generating Plant Lives Coal [PROPRIETARY] |
| November 15, 2018 | Order Granting Intervention of Western Resource Advocates |
| November 9, 2018 | Appendix A, Re: Kevin C. Higgins, Courtney Higgins, Neal Townsend, Justin Bieber, and Phillip J. Russell for the Utah Association of Energy Users |
| November 9, 2018 | Petition to Intervene of the Utah Association of Energy Users |
| November 6, 2018 | Technical Conference Sign-In Sheet
Rocky Mountain Power’s Presentation for the November 6, 2018 Technical Conference
Combined List of Questions for the November 6, 2018 Technical Conference
Audio of Technical Conference held November 6, 2018 |
| October 31, 2018 | Sierra Club’s Petition to Intervene |
| October 31, 2018 | Appendix A, Re: Hunter Holman, Sarah Wright, and Kate Bowman for Utah Clean Energy |
| October 31, 2018 | Petition for Leave to Intervene of Utah Clean Energy |
| October 26, 2018 | Appendix A, Re: Sophie Hayes, Nancy Kelly, and Steven S. Michel for Western Resource Advocates |
| October 25, 2018 | Petition for Leave to Intervene of Western Resource Advocates |
| October 25, 2018 | Public Service Commission Staff’s Questions Re: November 6, 2018 Technical Conference |
| October 22, 2018 | Correspondence from Rocky Mountain Power Re: November 6, 2018 Technical Conference |
| October 2, 2018 | Appendix A Re: Donna Ramas for the Office of Consumer Services |
| October 2, 2018 | Scheduling Order, Notice of Technical Conference, and Notice of Hearing |
| September 27, 2018 | Scheduling Conference Sign-In Sheet |
| September 13, 2018 | Notice of Scheduling Conference |
| September 13, 2018 | Comments from the Division of Public Utilities |
| September 12, 2018 | Appendix A Re: William Dunkel and Roxie McCullar for the Division of Public Utilities |
| September 11, 2018 | Action Request Due: October 11, 2018 |
| September 11, 2018 | Rocky Mountain Power’s Application
RMP Spanos Workpapers 1 – 2017 Depreciation Schedule East Plant
RMP Spanos Workpapers 2 – 2017 Depreciation Schedule West Plant
RMP Spanos Workpapers 3 – 2017 Production Net Salvage East Plant
RMP Spanos Workpapers 4 – 2017 Production Net Salvage West Plant
RMP Spanos Workpapers 5 – 2020 Depreciation Schedule East Plant
RMP Spanos Workpapers 6 – 2020 Depreciation Schedule West Plant
RMP Spanos Workpapers 7 – 2020 Production Net Salvage East Plant
RMP Spanos Workpapers 8 – 2020 Production Net Salvage West Plant
RMP Teply Workpapers 9 – Estimated Decommissioning Costs
RMP McDougal Workpapers 10 – Depreciation Rate Comparison
RMP Teply Exhibit A – Estimated Decommissioning Costs
RMP Teply Exhibit B – Estimated Plant Retirement Lives Steam and Gas
RMP McDougal Exhibit C – UT Allocated Edited
RMP McDougal Exhibit D – Estimated STEP Deferral and Amortization Table
RMP McDougal Exhibit E – BCC Balances
RMP Hemstreet Exhibit F – Existing and Proposed Depreciable Lives for Renewable Resources
RMP Spanos Exhibits Accompanying Testimony – Depreciation Study |
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