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.

Electric IRP

2023 Electric IRP

Avista began developing the 2023 IRP in late 2021. 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.

2023 Electric IRP (PDF)
Appendix A - 2023 Technical Advisory Committee Presentations and Meeting Minutes (PDF)
Appendix B - Work Plan (PDF)
Appendix C - AEG Conservation Potential and Demand Response Potential Assessments (PDF)
Appendix D - DNV Non-Energy Impact Studies (PDF)
Appendix E - Transmission Designated Network Study (PDF)
Appendix F - Inputs and Results (PDF)
- Energy Efficiency
  - Avista 2022 Electric CPA - Summary and IRP Inputs (Excel spreadsheet)
  - Final Avista Electric Measure List (Excel spreadsheet)
- PRiSM Model Files
  - PRS (Excel Spreadsheet)
  - Alternative Lowest Reasonable Cost (Excel Spreadsheet)
  - Baseline (Excel Spreadsheet)
  - No Additions (Excel Spreadsheet)
  - No CETA-NCIF-SCGHG-NG (Excel Spreadsheet)
  - WRAP PRM (Excel Spreadsheet)
  - WRAP PRM No QCC Changes (Excel Spreadsheet)
  - VERstoWA (Excel Spreadsheet)
  - LowEconGrowth (Excel Spreadsheet)
  - HighEconGrowth (Excel Spreadsheet)
  - High EV Growth (Excel Spreadsheet)
  - WA All Electric Gas Scenario (Excel Spreadsheet)
  - WA Electrification NG Backup (Excel Spreadsheet)
  - Combined Electrification (Excel Spreadsheet)
  - Combined Electrification with Dist Costs (Excel Spreadsheet)
  - Clean Portfolio (Excel Spreadsheet)
  - Social Cost Included for Idaho (Excel Spreadsheet)
  - Max Customer Benefit (Excel Spreadsheet)
  - PRiSM Model Guide (Word Document)
  - PRiSM Results (Excel Spreadsheet)
- Market Modeling Inputs and Results
  - Avista DR Potential Inputs Levelized Cost (Excel Spreadsheet)
  - Load Forecast for 2023 Progress Report (Excel Spreadsheet)
  - Market Modeling Results (Excel Spreadsheet)
  - Natural Gas Expected Price Forecast (Excel Spreadsheet)
  - Social Cost of Carbon (Excel Spreadsheet)
  - Supply Side Resource Options (Excel Spreadsheet)
- Market Reliance Analysis
  - 2030 330 MW Summary Results (Excel spreadsheet)
  - 2030 1000 MW Summary Results (Excel spreadsheet)
  - 2045 330 MW Summary Results (Excel spreadsheet)
  - 3045 1000 MW Summary Results (Excel spreadsheet)
Appendix G - DER Potential Scope of Work (PDF)
Appendix H - Cover (PDF)
Appendix I - Transmission Request (PDF)
Appendix J - Confidential Inputs (PDF)
Appendix K - Resource Portfolio Summary (PDF)
Appendix L - Public Participation Comments (PDF)

2023 TAC Meeting Recordings

View recorded TAC 2 meeting
View recorded TAC 3 meeting part 1 and part 2
View recorded TAC 4 meeting
View recorded TAC 5 meeting
View recorded TAC 6 meeting
View recorded TAC 7 meeting
View recorded TAC 9 meeting

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

Archive of Electric IRP Documents

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:

1st Public Meeting from 12pm – 1pm
2nd Public Meeting from 5pm – 6pm

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

Electric Integrated Resource Plan (PDF)
2017 Electric IRP Appendices (PDF)

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.

Natural Gas IRP

The 2021 natural gas IRP was filed on April 1, 2021. If you or your organization would like to participate in the process for the 2023 IRP, or be included in our Technical Advisory Committee mailing list, please email Tom Pardee or contact him by phone at (509) 495-2159.

2023 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

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)

Archive of Natural Gas IRP Documents

Recordings from each public meeting can be found here:

1st Public Meeting from 12pm – 1pm
2nd Public Meeting from 5pm – 6pm

2021 Natural Gas IRP

2021 Avista Natural Gas IRP (PDF)
2021 Avista Natural Gas IRP Appendices (PDF

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.