Integrated Resource Planning
Planning is integral to everything we do at Avista, and it is especially important in determining how to meet the future energy needs of our customers. Central to this effort is a process called the Integrated Resource Plan, or IRP. You can think of the IRP as a roadmap for how we will meet the energy needs of our electric and natural gas customers 20 years into the future.
Having a diverse energy mix is the foundation of Avista's ability to provide our customers with clean, reliable power at fair, reasonable rates. Our diversified energy portfolio ensures we have a stable supply of power around the clock, every day of the year, today and into the future.
As a regulated utility, Avista files an electric IRP in odd years with the public utility commissions in Washington and Idaho. We also file a natural gas IRP with the public utility commissions in Washington, Idaho, and Oregon every other year.
An important part of both the electric and natural gas IRP process is public involvement. Two key opportunities for public involvement are through the Technical Advisory Committee, or TAC, and public comment periods.
2025 Electric IRP
Avista filed the 2025 IRP December 31, 2024 and will begin developing the 2027 IRP in early 2025. If you are interested in joining the TAC and participating in the development of the IRP, please email John Lyons or contact him at (509) 495-8515. You can also contact him with questions about previous IRPs, the TAC process or the Work Plan.
- Avista 2025 Electric IRP (PDF)
- Appendix A - TAC Presentations (PDF)
- Appendix B - Work Plan (PDF)
- Appendix C - EE & DR Potential Assessments (PDF)
- Avista 2024 - Electric Measure List (Excel)
- Electric DR Input Generator (Excel)
- Appendix D - T&D Assessments (PDF)
- Appendix E - Generation Interconnection (PDF)
- Appendix F - DER Study (PDF)
- Appendix G (PDF)
- Energy Efficiency Avoided Cost
- No EE (Excel Spreadsheet)
- No EE Capacity Only (Excel Spreadsheet)
- No EE No Build (Excel Spreadsheet)
- EE Avoided Cost (Excel Spreadsheet)
- Modeling Inputs
- CCA Price Forecast (Excel Spreadsheet)
- Load Forecast and Scenarios (Excel Spreadsheet)
- Natural Gas Price Forecast (Excel Spreadsheet)
- Social Cost of Carbon (Excel Spreadsheet)
- Supply Side Resource Options (Excel Spreadsheet)
- Weather Data
- Climate Change Temperature Data for Load Forecast RCP4.5 (Excel Spreadsheet)
- Climate Change Temperature Data for Load Forecast RCP8.5 (Excel Spreadsheet)
- Comparison 2020-24 RCP4.5 RCP8.5 and Actual (Excel Spreadsheet)
- Peak and Energy Forecast Climate Data (Excel Spreadsheet)
- PRiSM Model Files
- Energy Efficiency Solution (Excel Spreadsheet)
- PRS (Excel Spreadsheet)
- ALT Lowest Reasonable Cost (Excel Spreadsheet)
- Baseline (Excel Spreadsheet)
- Clean Resources Portfolio (Excel Spreadsheet)
- Clean Resources Portfolio Higher PRM (Excel Spreadsheet)
- Low Load (Excel Spreadsheet)
- High Load (Excel Spreadsheet)
- WA Building Electrification (Excel Spreadsheet)
- WA Building and High Transportation Electrification (Excel Spreadsheet)
- System Building and Transportation Electrification (Excel Spreadsheet)
- WA Max Customer Benefits (Excel Spreadsheet)
- 500 MW Nuclear (Excel Spreadsheet)
- 17% PRM (Excel Spreadsheet)
- 30% PRM (Excel Spreadsheet)
- P2G Unavailable (Excel Spreadsheet)
- Min CETA Target (Excel Spreadsheet)
- Max CETA Target (Excel Spreadsheet)
- PRS Cost Cap Constrained (Excel Spreadsheet)
- Data Center (Excel Spreadsheet)
- RCP 8.5 Load (Excel Spreadsheet)
- System Building and Transportation Electrification No New NGRCP8.5 (Excel Spreadsheet)
- No Regional Transmission (Excel Spreadsheet)
- NE Retire 2026 (Excel Spreadsheet)
- 200 MW Low Cost Wind Limit (Excel Spreadsheet)
- No IRA Tax Incentives (Excel Spreadsheet)
- NE Retire (Excel Spreadsheet)
- Resource Portfolio Summary (Excel Spreadsheet)
- Market Sensitivities
- Deterministic PRS (Excel Spreadsheet)
- High NG Prices PRS (Excel Spreadsheet)
- Low NG Prices PRS (Excel Spreadsheet)
- No CCA Pricing (Excel Spreadsheet)
- Deterministic Baseline (Excel Spreadsheet)
- High NG Prices Baseline (Excel Spreadsheet)
- Low NG Prices Baseline (Excel Spreadsheet)
- Deterministic Clean Portfolio (Excel Spreadsheet)
- High NG Prices Clean Portfolio (Excel Spreadsheet)
- Low NG Prices Clean Portfolio (Excel Spreadsheet)
- Deterministic 500 MW Nuclear (Excel Spreadsheet)
- High NG Prices 500 MW Nuclear (Excel Spreadsheet)
- Low NG Prices 500 MW Nuclear (Excel Spreadsheet)
- No CCA Pricing Least Cost (Excel Spreadsheet)
- Market Modeling Results (Excel Spreadsheet)
- PRiSM Model Guide (PDF)
- Appendix H - Confidential Generation Data (PDF)
- Appendix I - Confidential Generation Data (PDF)
- Appendix J - New Resource Transmission Table (PDF)
- Appendix K - Schedule 62 (PDF)
- Appendix M - Public Comments (PDF)
- Appendix N - Energy Burden Assessment (PDF)
2025 TAC Meeting Recordings
- View TAC 1 Recorded Meeting
- View TAC 2 Recorded Meeting
- View TAC 3 Recorded Meeting
- View TAC 4 recorded meeting
- View TAC 5 recorded meeting
- View TAC 6 recorded meeting
- View TAC 7 recorded meeting
- View TAC 8 recorded meeting
- View TAC 9 recorded meeting
- View Technical Modeling Workshop recorded meeting
- View TAC 10 recorded meeting
- View TAC 11 recorded meeting
- View TAC 12 recorded meeting
- View TAC 13 recorded meeting
Additional TAC meeting dates will be posted as they are scheduled.
Variable Energy Resources Study
| September 13, 2023 |
VER Workgroup 9-13-22 (PDF) VER Study Update 9-13-22 (PDF) VER Workgroup Video 9-13-22 |
2023 Electric IRP
- 2023 Electric IRP (PDF)
- 2023 Electric IRP Appendices (PDF)
The public, customers, and interested parties were invited to join Avista to review current resource selections to meet state climate goals and energy demand forecasts on March 8, 2023. This meeting included a pre-recorded webinar explaining our current IRP process and overviews of each of Avista’s plans. You can also view the slides from the webinar.
Recordings from each public meeting can be found here:
2021 Electric IRP
- Electric Integrated Resource Plan (PDF)
- Avista Electric 2021 IRP PRS Update and CEAP Update (PDF)
- 2021 Electric IRP TAC Update Meeting Notes, May 18, 2021 (PDF)
- Appendix A - TAC Presentations and Meeting Notes (PDF)
- Appendix B - 2021 IRP Work Plan (PDF)
- Appendix C - Public Participation Comments (PDF)
- Appendix D - Unavailable Confidential Historical Generation Operation Data (PDF)
- Appendix E - AEG Conservation and Demand Response Potential Assessment (PDF)
- Appendix F - Avoided Cost Calculations (PDF and XLS)
- Appendix F Update (PDF)
- Appendix G - Transmission 10-Year Plan and 2019-2020 Avista System Assessment (PDF)
- Appendix H - New Resource Table for Transmission (PDF)
- Appendix I - Publicly Available Inputs and Models (PDF)
- Appendix J - Confidential Inputs and Models (PDF)
- Appendix K - Load Forecast Supplement (PDF)
2021 IRP Input Assumptions (Appendix I)
- Avista Resource Emissions Summary (Excel spreadsheet)
- Load Forecast (Excel spreadsheet)
- CPA Measures (Excel spreadsheet)
- Avista 2020 Electric CPA - Summary and IRP Inputs (Excel spreadsheet)
- Home Electrification Conversions (Excel spreadsheet)
- Named Populations (Excel spreadsheet)
- Natural Gas Prices (Excel spreadsheet)
- Social Cost of Carbon (Excel spreadsheet)
- High and low natural gas prices (Excel spreadsheet)
- Market modeling results (Excel spreadsheet)
- Climate shift scenario inputs (Excel spreadsheet)
- 2021 IRP New Resource Options - February 1, 2021 (Excel spreadsheet)
Portfolio Models
- Baseline 1 (Excel spreadsheet)
- Baseline 1 Update (Excel spreadsheet)
- Preferred Resource Strategy (Excel spreadsheet)
- Baseline 2 (Excel spreadsheet)
- Baseline 2 Update (Excel spreadsheet)
- Baseline 3 (Excel spreadsheet)
- Baseline 3 Update (Excel spreadsheet)
- Clean Resource Plan (2027) (Excel spreadsheet)
- Clean Resource Plan (2045) (Excel spreadsheet)
- SCC Idaho (Excel spreadsheet)
- Low load forecast (Excel spreadsheet)
- High load forecast (Excel spreadsheet)
- RA Program (Excel spreadsheet)
- Electrification 1 (Excel spreadsheet)
- Electrification 2 (Excel spreadsheet)
- Electrification 3 (Excel spreadsheet)
- 2x SCC (Excel spreadsheet)
- Colstrip Exit 2025 (Excel spreadsheet)
- Colstrip Exit 2035 (Excel spreadsheet)
- Colstrip Exit 2045 (Excel spreadsheet)
- Clean Energy Delivery by Hr. (Excel spreadsheet)
- SCC on Net P/S (Excel spreadsheet)
- Use Avg Mrkt for EE SCC (Excel spreadsheet
- PRiSM Draft Results (Excel spreadsheet)
2020 IRP
- Electric Integrated Resource Plan (PDF)
- 2020 IRP Appendices (PDF)
- Appendix E - Measure List (Excel spreadsheet)
- Appendix H - Supply Side Resource Options (Excel spreadsheet)
2017 Integrated Resource Plan
2015 Integrated Resource Plan
- 2015 Electric Integrated Resource Plan (PDF)
- 2015 Electric IRP Appendix A - TAC Presentations (PDF)
- 2015 Electric IRP Appendix B - Work Plan (PDF)
- 2015 Electric IRP Appendix C - AEG Studies (PDF)
- 2015 Electric IRP Appendix D - Avista Generation Energy Efficiency Studies (PDF)
- 2015 Electric IRP Appendix E - Transmission Studies (PDF)
2013 Integrated Resource Plan
- 2013 Electric Integrated Resource Plan (PDF)
- 2013 Electric Integrated Resource Plan Appendices (PDF)
2011 Integrated Resource Plan
- 2011 IRP Document (PDF)
- 2011 IRP Appendix (PDF)
2009 Integrated Resource Plan
- 2009 IRP Document (PDF)
- 2009 IRP Appendix (PDF)
- 2009 IRP Appendix Table of Contents (PDF)
2007 Integrated Resource Plan
- 2007 IRP Document (PDF)
- 2007 IRP Appendix (PDF)
- 2007 Wind Integration Study Report (PDF)
2005 Integrated Resource Plan
- 2005 IRP Document (PDF)
- 2005 IRP Appendices 1 (PDF)
- 2005 IRP Appendices 2 (PDF)
2003 Integrated Resource Plan
- 2003 IRP Document (PDF)
- 2003 IRP Appendices.pdf (PDF)
2001 Integrated Resource Plan
- 2001 IRP Document (PDF)
1997 Integrated Resource Plan
- 1997 IRP Document (PDF)
- 1997 IRP Appendices.pdf (PDF)
1995 Integrated Resource Plan
- 1995 IRP Document (PDF)
- 1995 IRP Appendices (PDF)
1993 Integrated Resource Plan
- 1993 IRP Document (PDF)
- 1993 IRP Appendices (PDF)
1991 Integrated Resource Plan
- 1991 IRP Document (PDF)
1989 Integrated Resource Plan
- 1989 IRP Document (PDF)
Direct questions to James Gall, Avista's Electric IRP Manager.
2025 Gas IRP
The 2025 natural gas IRP was filed on March 31st, 2025. If you or your organization would like to participate in the process for the 2027 IRP, or be included in our Technical Advisory Committee mailing list, please email Tom Pardee or contact him by phone at (509) 495-2159. You can also contact him with questions about previous IRPs, the TAC process or the Work Plan.
- Avista 2025 Natural Gas IRP (PDF)
- 2025 Natural Gas IRP Appendices (PDF)
- CHROME Model Files
- PRS Inputs (XLS)
- Deterministic HDDs (XLS)
| Major Milestone |
Date and Time (PST) |
Documents |
| TAC 1 |
February 14, 2024 9:00 am - 12:00 pm (PTZ) |
View TAC 1 Agenda (PDF) View TAC 1 Presentation (PDF) View TAC 1 Recorded Meeting |
| TAC 2 |
April 24, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 2 Agenda (PDF) View TAC 2 Presentation (PDF) View TAC 2 Recorded Meeting |
| TAC 3 |
May 15, 2024 10:30 am - 12:00 pm (PTZ) Topics moved to TAC 4 |
|
| TAC 4 |
June 5, 2024 9:00 am - 12:00 pm (PTZ) |
View TAC 4 Presentation (PDF) View TAC 4 Recorded Meeting |
| TAC 5 |
June 26, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 5 Presentation (PDF) View TAC 5 Recorded Meeting |
| TAC 6 |
July 17, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 6 Presentation (PDF) View TAC 6 Recorded Meeting |
| TAC 7 |
August 21, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 7 Presentation (PDF) View TAC 7 Recorded meeting |
| TAC 8 |
September 25, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 8 Presentation (PDF) View TAC 8 Recorded meeting |
| TAC 9 |
November 19, 2024 10:30 am - 12:00 pm (PTZ) |
View TAC 9 Presentation (PDF) View TAC 9 Recorded Meeting |
| TAC 10 |
January 9, 2025 9:30 am - 12:00 pm (PTZ) |
View TAC 10 presentation (PDF) View TAC 10 Recorded Meeting |
| TAC 11 | January 22, 2025 10:00 am - 12:00 pm (PTZ) |
View TAC 11 presentation (PDF) View TAC 11 Recorded Meeting |
| Public Meeting |
March 5, 2024 12:00 pm (PTZ) Virtual Public Meeting Natural Gas & Electric IRP |
View presentation (PDF) View recorded meeting
|
2023 IRP Documents
- 2023 Natural Gas Integrated Resource Plan (PDF)
- 2023 Natural Gas Integrated Resource Plan Appendices (PDF)
- AEG Firm Cust Avista 2022 Gas CPA - Draft IRP Inputs (XLS)
- AEG OR Gas Low Income - Draft IRP Inputs (XLS)
- Allowance Floor and Ceiling Prices (XLS)
- 2022 Gas Transport CPA - Final Graphics (XLS)
- Gas Stand Alone Results Summary (XLS)
- CCA Allowance Price Forecast (XLS)
- Coefficients Base and Heat (XLS)
- Customer Forecasts 2023 IRP (XLS)
- 2023 IRP Savings Projections (XLS)
- Gas Resource Options (XLS)
- Home Electrification Conversion (XLS)
- Klamath Falls Climate Change Data (XLS)
- La Grande Climate Change Data (XLS)
- Medford Climate Change Data (XLS)
- Spokane Climate Change Data (XLS)
- Natural Gas Price Forecast (XLS)
- OR Avista DR Potential 2022 IRP Inputs Levelized Cost (XLS)
- WA Avista DR Potential 2022 IRP Inputs Levelized Cost (XLS)
- ID Avista DR Potential 2022 IRP inputs Levelized Cost (XLS)
The public, customers, and interested parties were invited to join Avista to review current resource selections to meet state climate goals and energy demand forecasts on March 8, 2023. This meeting included a pre-recorded webinar explaining our current IRP process and overviews of each of Avista’s plans. You can also view the slides from the webinar.
Recordings from each public meeting can be found here:
2021 Natural Gas IRP
2018 Natural Gas IRP
- Work Plan for Avista's 2018 Natural Gas IRP (PDF)
- TAC 1: Thursday, January 25, 2018 (PDF)
- TAC 2: Thursday, February 22, 2018 (PDF): Weather analysis, supply-side resources overview, overview of the major interstate pipelines, and the procurement plan.
- TAC 3: Thursday, March 29, 2018 (PDF): Distribution, environmental policies, market dynamics, price forecasts, cost of carbon, and initial modeling results.
- TAC 4: Thursday, May 10, 2018 (PDF): DSM results, stochastic modeling and supply-side options, final portfolio results, and 2020 Action Items.
2018 Natural Gas IRP
- 2018 Natural Gas IRP (PDF)
- 2018 Natural Gas IRP Appendices (PDF)
2016 Natural Gas IRP
- 2016 Natural Gas IRP (PDF)
- 2016 Natural Gas IRP Appendices (PDF)
2014 Natural Gas IRP
- 2014 Natural Gas IRP (PDF)
- 2014 Natural Gas IRP Appendices (PDF)
2012 Natural Gas IRP
- 2012 Natural Gas IRP (PDF)
- 2012 Natural Gas IRP Appendices (PDF)
2009 Natural Gas IRP
- 2009 IRP Document (PDF)
- 2009 IRP Appendix (PDF)
2007 Natural Gas IRP
- 2007 IRP Document (PDF)
- 2007 IRP Appendix (PDF)
2006 Natural Gas IRP
- 2006 IRP Document (PDF)
- 2006 IRP Appendix (PDF)
If you have questions about these plans, please contact Tom Pardee by email or at (509) 495-2159.