Integrated resource plan

The Integrated Resource Plan (IRP) is a forecast of conservation resources and supply-side resource additions that appear to be cost effective to meet the growing needs of our customers over the next 20 years.

We know these forecasts will change as the future unfolds and conditions change.

The IRP:

  • Examines the many energy-resource options available to PSE, including the maximum amount of new energy "supply" we can acquire through energy efficiency

  • Makes a thorough, objective assessment of the benefits, costs and risks associated with each energy-supply option

  • Analyzes the region's population and economic trends, including a forecast of PSE customers' natural gas and electricity needs two decades into the future

  • Evaluates political and economic policies and trends, and their potential impact on energy production, usage and availability

Every two years, a team of in-house economists, energy specialists, environmental advocates, demographers and other experts develops a new IRP.

2019 IRP Plan Public Participation

Information and presentations concerning the 2019 public participation process are available below. The Work Plan for the 2019 IRP will be filed with the Washington Utilities and Transportation Commission on or before July 13, 2019. PSE intends to remove the 2017 IRP meeting archive by or before that date, but materials concerning that process will be available upon request.

The IRP Advisory Group (IRPAG) and the Technical Advisory Group (TAG) are teams of external stakeholders and regulators who meet to provide input during the integrated resource planning process. Their valuable input helps to guide the development of PSE's Integrated Resource Plan (IRP).

The kickoff meeting for the 2019 IRP was on May 30, 2019. The meeting covered team introductions, basic IRP education, ground rules, electric scenarios and sensitives, and system planning.

IRP charters and meeting schedules:
  1. IRP TAG charter
  2. IRP IRPAG charter
  3. IRP Stakeholder meeting schedule

Materials from the May 30 meeting:
  1. Meeting agenda
  2. Presentation materials
  3. Draft stakeholder charter
  4. Final meeting notes

The first TAG meeting was held on July 26, 2018 at Bellevue College. Please see agenda for additional details. The meeting will cover electric resource costs and the TAG Charter. Meeting materials include: 
  1. Meeting agenda
  2. Updated draft TAG charter
  3. PSE 2019 Work Plan, filed July 13, 2018
  4. HDR presentation slides - electric resource costs
  5. HDR draft electric resource costs report
  6. IRP TAG Meeting 1 Slide Deck with updated HDR presentation slides
  7. Handout 1: Comparison Generic Resource Costs
  8. Handout 2: 2019 IRP Generic Renewable Inputs
  9. Handout 3: 2019 IRP Generic Energy Storage Inputs
  10. Handout 4: 2019 IRP Generic Thermal Inputs
  11. Handout 5: Document detailing changes between first issue of HDR draft materials and the TAC meeting
  12. Handout 6: Letter from Willard Westre to PSE dated June 14, 2018
  13. Handout 7: Action item report from May 30 IRPAG meeting
  14. Final meeting summary from TAG 1 meeting July 26, 2018 
  15. HDR final electric resource costs report

PSE received questions concerning the HDR report prior to the meeting. PSE’s responses are provided below:
  1. PSE and HDR responses to pre-TAG #1 meeting Questions and Answers dated July 7, 2018

PSE received feedback on the HDR report by stakeholders. The feedback was due by August 2 and PSE responded on August 16. The documentation is provided below:
  1. TAG comments and PSE responses dated August 16, 2018

The second IRPAG meeting was held on Tuesday, August 28 from 6 to 8 p.m. at the Meydenbauer Center located in Bellevue. The meeting covered IRP overview, load forecasts, planning standards, and electric resource costs. Meeting materials include:
  1. Meeting agenda
  2. IRP public comment guidelines
  3. PSE presentation slides
  4. Final meeting summary

The second TAG meeting was held on Thursday, October 11 from 9 a.m. to 5:00 p.m. at the Meydenbauer Center located in Bellevue. The meeting will cover scenarios (including carbon price/regulation), portfolio sensitives, and gas resource alternatives. Meeting materials include:
  1. Meeting agenda
  2. PSE presentation slides
  3. Handouts
  4. IRP public comment guidelines
  5. Final meeting summary

The third TAG meeting was held on Thursday, December 6 at the Bellevue Hilton. The meeting will cover draft conservation resource potential assessment. Meeting materials include:
  1. Meeting agenda
  2. IRP public comment guidelines
  3. Meeting presentation materials
  4. Final meeting summary

The fourth TAG meeting was held on Wednesday, January 9, 2018 at the Bellevue Hilton. The meeting will cover system planning (transmission and distribution), portfolio sensitives, and the load forecast. Meeting materials include:
  1. Meeting agenda
  2. IRP public comment guidelines
  3. Meeting presentation materials
  4. Handout 1 – sensitivities ranking
  5. Handout 2 – PSE planned major projects
  6. Final meeting summary

Our fifth Integrated Resource Plan Technical Advisory Group (IRP TAG) meeting was held on Thursday, February 7 from 9:30 a.m. – 5:00 p.m. at the Hilton in Bellevue. Meeting covered resource adequacy and the gas planning standard. Meeting materials include:
  1. Meeting agenda
  2. Meeting materials
  3. Petition for 2019 IRP Extension dated February 1, 2019
  4. Amended Petition for 2019 IRP Extension dated February 4, 2019
  5. Final meeting summary

Action items:

  1. PSE 2019 IRP Draft comparison of electric resource costs
  2. PSE 2019 IRP Draft electric generic resource assumptions
  3. August 2018 Q&As from Vashon Climate Action Group and PSE responses
  4. Draft Loss of Load Probability (LOLP) by Month
  5. Draft Effective Load Carrying Capability (ELCC) of Batteries by Hours of Storage
  6. Revised PSE 2019 Work Plan Filing dated February 28, 2019
  7. Description of the difference between the 2017 and 2019 combined heat and power potential dated March 29, 2019


2017 FINAL IRP Plan Detail

PSE's 2017 Draft IRP was available September 12, 2017. The Final was filed with the Washington Utilities and Transportation Commission on November 14, 2017 and is also available at

The links below will take you to the 2017 Final Integrated Resource Plan (IRP) documents by chapter and appendix.

2017 Integrated Resource Plan


  1. Executive Summary
  2. Resource Plan Decisions
  3. Planning Environment
  4. Key Analytical Assumptions
  5. Demand Forecasts
  6. Electric Analysis
  7. Gas Analysis
  8. Delivery Instructure Planning

  2017 PSE IRP Chapter Book compressed


  1. Public Participation
  2. Legal Requirements and Other Reports
  3. Environmental and Regulatory Matters
  4. Electric Resources & Alternatives
  5. Demand Forecasting Models
  6. Regional Resource Adequacy Studies
  7. Wholesale Market Risk
  8. Operational Flexibility
  9. Regional Transmission Resources
  10. Demand-side Resources Navigant Report: 2017 IRP Demand-Side Resource Conservation Potential Assessment Report
  11. Colstrip
  12. Electric Energy Storage
  13. Washington Wind and Solar Costs
  14. Electric Analysis
  15. Gas Analysis
  16. Gas Fired Resource Costs

2017 PSE IRP Appendix Book compressed

2017 IRP Advisory Group

Information and presentations for the 2017 IRP Advisory Group meetings are available below. 

The IRP Advisory Group (IRPAG) is a team of external stakeholders and regulators who meet regularly to provide feedback during the integrated resource planning process. Their valuable input helps to guide the development of PSE's Integrated Resource Plan (IRP).

For a more detailed discussion of the role of the IRPAG, see the 2017 IRP Work Plan.

Questions concerning the IRP can be directed to Phillip Popoff, Manager Integrated Resource Planning,, 425-462-3229.

IRPAG meeting materials

1: Friday, June 17, 2016—IRP Advisory Group
Review WUTC Letter on 2015 IRP
-Meeting Notes
-Meeting Handouts
Process and Ground Rules for 2017 IRP Public Participation Process
2: Monday, July 25, 2016—Thermal Generation RAC
-PSE has worked with Black and Veech on thermal plant acquisition and development work for some time. They have been the primary source of plant cost assumptions for IRPs in the past.
-They, along with others, will be available to discuss updates to their detailed cost assumptions.
-The focus is on details needed for portfolio modeling, not levelized cost screening.
-Meeting Notes
-Meeting Handouts
3: Wednesday, July 27, 2016—DSR-AC and IRP Advisory Group
-DSR-AC: 9 am to noon. Navigant is replacing Cadmus in consulting on conservation resource potential assessments. Representatives will be here to walk through the details of how they will be approach that work.
Meeting Notes
-IRPAG: 12:30 to 3:30 pm. Focus on discussing scenarios and sensitivities for both electric and gas. While there may be overlap in some areas, we will discuss scenarios that will be different.
Meeting Notes
4: Monday, August 22, 2016—Renewable RAC
-Renewable Resources: 9 am – 12:30 pm. PSE has worked with RES on renewable resource acquisition and development for some time. RES has been the primary source of plant cost assumptions for IRPs in the past and will be available to discuss updated assumptions.
-Energy Storage: 1 pm to 3 pm. Focus on energy storage with several developers joining us in person or via web. Will include RES energy Storage and a few others.
Meeting Notes
5: Wednesday, August 31, 2016—IRP Advisory Group
-Continue discussion of Scenarios and Sensitivities.
-Focus on how PSE will approach each of the issues identified.
-Meeting Notes
6: Monday, September 26, 2016—GRAC and IRP Advisory Group
Electric resource alternative cost assumptions
Draft mid-C power prices
Review results of scenarios
IRP Process
Meeting Presentation
Meeting Handouts
7: Thursday, October 27, 2016
Gas Resource Advisory Committee: Discuss details of supply-side natural gas resources for modeling, including timing costs, and what expansions would be contingent on different market participants.
Electric Resource Alternative Assumptions
Final scenarios discussion and power prices
Meeting Notes
Meeting Handouts
8: Monday, November 14, 2016—IRP Advisory Group
Electric and gas load forecasts: customers, loads and peaks
Electric resource needs — or check-in if not final
Gas resource needs
Discuss regional resource adequacy and approach to addressing market reliance given regional short-fall in 2022
Meeting Notes
8a: Wednesday, December 14th, 2016-IRPAG meeting–postponed
-DSR-TAC: Review Conservation Potential Assessment
-Final Scenario Power Prices
-Final Resource Assumptions (including Montana Wind)
9: Wednesday, January 25, 2017—IRP Advisory Group
-Demand Side Resource Potential Assessment Results – Navigant Consulting
Conservation Plan Results–Energy Efficiency and Fuel Conversion
Conservation Plan Results–Distributed Generation
Conservation Plan Results–Energy Storage
Final Meeting Notes
Presentation PSE
Presentation Navigant
Meeting Handouts
10: Friday, February 3, 2017—IRP Advisory Group
-Resource Adequacy & Resource Need
-Resource Costs and Portfolio Sensitivities
-Montana Wind Transmission
-Gas Prices and Power Prices
-Final Meeting Notes
-Meeting Handouts, IRPAG Feb3-FINAL-presentation, IRP Energy Storage Handout, IRP Renewable Resources Handout, IRP Thermal Resources Handout, IRP Montana Wind Handout
11: Thursday, March 16, 2017—IRP Advisory Group
-Electric and Gas System Planning
-Final Meeting Notes
-Meeting Handout 01
-Meeting Handout 02
12: Monday, May 22, 2017—IRP Advisory Group
-Gas Simple Cycle and Combined Cycle Cost Assumptions
-Wind Farm Energy Modeling Results and Wind and Solar Cost Assumptions
-Final Meeting Notes
-PSE Presentation
-DNV GL Presentation
-Black & Veatch Presentation
-2017 IRP Revised Schedule
-Meeting Handouts
-WUTC Order 01
-Portfolio Sensitivity Handout
-Updated 2017 IRP Renewable Resource Assumptions
13: June 22, 2017 IRP Advisory Group
-IRP Process Review, Portfolio Analysis Methodology, and Effective Load Carrying Capability (ELCC)
-Final Meeting Notes
13b: Demand Side Resource Conservation Potential Assessment Report 
-authored by Navigant was filed with the WUTC on Friday, June 30.
-DSR Conservation Potential Assessment Report
14: July 21, 2017 IRP Advisory Group
-Operational Flexibility
-Draft Meeting Notes
-PSE Presentation
-E3 Presentation
15: August 11, 2017—IRP Advisory Group
-Review final draft electric resource plans
-Review draft results of scenarios and sensitivities 
that will be presented in draft IRP
-Review final draft gas resource plans
-Final Meeting Notes
-PSE Presentation
16: Written Q & As provided to PSE 2017 IRPAG “Share” email list distribution 
between 12/16 & 08/17

-PDF of the email communications
17: October 5, 2017—IRP Advisory Group:
-Feedback on Draft IRP
-Meeting Agenda
-Final Meeting Notes

Integrated resource plan