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Integrated System Plan

The electric power industry is undergoing a dramatic transformation fueled by changing customer expectations and desires, technological innovations and a focus on the environment.

Integrated System Plan Update

On Oct. 2, 2023, SRP’s District Board of Directors approved power system strategies to be implemented between 2025 and 2035 that prioritize affordability, reliability, sustainability and customer focus.

The strategies are outlined in SRP’s Integrated System Plan (ISP), which was developed as part of a two-year, data-driven planning process that incorporated perspectives from Arizona universities, businesses, environmental organizations, limited income advocates, nonprofits and more.

SRP is one of the first U.S. utilities to shift from a traditional Integrated Resource Plan (IRP) to an Integrated System Plan. The previous planning process is traditional for the utility industry and mainly considers what power resources will be needed. SRP’s Integrated System Plan is a holistic roadmap for its future power system that factors in evolving customer energy needs and achieving SRP’s 2035 carbon reduction goals. The new plan was developed through collaboration with stakeholders and involved modeling potential system plans under varying Valley growth scenarios and possible regulatory and supply chain environments.

Read more about the ISP hereDocument is a PDF.

This new Integrated System Plan:

  • Collaboratively integrates all internal planning functions for generation, transmission, distribution and customer-sided resources
  • Adapts to evolving industry demands and enhances long-term resource value for our customers and communities
  • Addresses energy challenges through the lenses of sustainability, reliability and affordability
  • Creates inclusive opportunities for active external stakeholder engagement

SRP's Integrated System Plan reports and deliverables

Reports and deliverables for SRP’s first-ever Integrated System Plan will be posted throughout the process.

Engaging our stakeholders along the way

In the summer of 2021, SRP hosted an ISP Summer Stakeholder Series to update, educate and engage with external community stakeholders regarding the ISP transition. Working alongside communities is how SRP has helped to successfully grow the Valley. This transition is no different. Working with you through this transition is essential as we chart the course to a successful ISP.

ISP Stakeholder Engagement Opportunities


Other Engagement Opportunities

  • Technical Working Sessions, open to all Large Stakeholders and Advisory Groups with an interest in the technical aspects of power system planning, will be offered around various topics of interest throughout the project.
  • Advisory Group Technical Subgroups, composed of self-selected Advisory Group members who have a strong interest in diving into specific Integrated System Plan topics, will have sessions around various topics of interest throughout the project.

Board & Council Work Study Sessions

Board & Council Study Session Day 1

Aug. 29, 2023, 9:30 a.m.–12:30 p.m. (MST)

Meeting Documents

Board & Council Study Session Day 2

Aug. 30, 2023, 9:30 a.m.–12:30 p.m. (MST)

Meeting Documents

ISP Large Stakeholder Group

Meeting 1: ISP Launch and Vision

Nov. 30, 2021, 9–11 a.m. (MST)

Meeting Documents

Meeting 2: ISP Study Plan

April 29, 2022, 8 a.m. - 10 a.m. (MST)

Meeting Documents

Meeting 3: ISP Early Key Findings

May 12, 2023, 10 a.m. - 1 p.m. (MST)

Meeting Documents

Meeting 4: ISP Path Forward

September 28, 2023, 9:30 a.m. - 1 p.m. (MST)

Meeting Documents

ISP Technical Working Sessions

Integrated System Plan Study Plan Details - Modeling Ecosystem

April 29, 2022, 10:15 a.m.–12 p.m. (MST) 

Meeting Documents

Inflation Reduction Act

January 17, 2023, 9–11:30 a.m. (MST) 

Meeting Documents

Inverter-Based Resource Integration

February 24, 2023, 1–3:30 p.m. (MST) 

Meeting Documents

Regional Market Developments

March 31, 2023, 9–11:30 a.m. (MST) 

Meeting Documents

Evolution of Time-of-Day Programs

July 12, 2023, 1–3:30 p.m. (MST) 

ISP Advisory Group

Meeting 1: Meet & Greet Role Discussion/Orientation

Nov. 18, 2021, 1–3 p.m. (MST)

Meeting Documents

Meeting 2: Planning Amidst Change

Dec. 6, 2021, 3–5 p.m. (MST)

Meeting Documents

Meeting 3: Our Power Future, Together

Jan. 19, 2022, 9–11:30 a.m. (MST)

Meeting Documents

Advisory Modeling Subgroup Meeting 1: ISP Modeling Ecosystem

Feb. 11, 2022, 9–11:30 a.m. (MST)

Meeting Documents

Meeting 4: Scenario Planning Framework – Part 2 & Strategic Approach Options – Part 1

Feb. 15, 2022, 9 a.m–12 p.m. (MST)

Meeting Documents

Meeting 5: Strategic Approach Options – Part 2 & Integrated System Plan Metrics – Part 1

March 14, 2022 9 a.m–12 p.m. (MST)

Meeting Documents

Advisory Modeling Subgroup Meeting 2: Inputs for the ISP Study Plan

March 21, 2022 10 a.m–12:30 p.m. (MST)

Meeting Documents

Advisory Modeling Subgroup Meeting 3: Inputs for the ISP Study Plan – Part 2

April 4, 2022 1–2:30 p.m. (MST)

Meeting Documents

Meeting 6: Integrated System Plan Study Launch [Hybrid]

April 15, 2022 9 a.m.–1 p.m. (MST)

Meeting Documents

Meeting 7: Final Metrics, Customer Research Update & Process Reflections

June 8, 2022 9 a.m.–12:30 p.m. (MST)

Meeting Documents

Meeting 8: ISP Progress Update & Engagement Framework for the Synthesize Phase

September 28, 2022 8:30 a.m.–3:00 p.m. (MST)

Meeting Documents

Advisory Modeling Subgroup Meeting 4: In-Depth ISP Analysis Review Part 1

October 25, 2022 1:30–4:00 p.m. (MST)

Meeting Documents

Meeting 9: Continuing Forward

January 27, 2023 8:30 a.m.–1:00 p.m. (MST)

Meeting Documents

Meeting 10: ISP Preliminary Results

March 10, 2023 8:30 a.m.–2:30 p.m. (MST)

Meeting Documents

Meeting 11: ISP Analysis Key Findings & Modeling Subgroup Technical Q&A Session

April 21, 2023 8:30 a.m.–12:30 p.m. (Modeling Subgroup 12:30–2:30 p.m.) (MST)

Meeting Documents

Meeting 12: ISP Analysis Key Findings & ISP Draft Strategies

May 19, 2023 8:30 a.m.–2:30 p.m. (MST)

Meeting Documents

Meeting 13: Meeting Forward Together Part 1

August 11, 2023 8:30 a.m.–4:00 p.m. (MST)

Meeting Documents

Meeting 14: Moving Forward Together Part 2

September 8, 2023 8:30 a.m.–12:30 p.m. (MST)

Meeting Documents

Summer Series Recap

To see a summary from the Summer Series stakeholder engagements, view the ISP Summer Series Summary ReportDocument is a PDF

ISP Summer Series Meeting 1: "Since We Last Met"

June 16, 2021, 9:30–11:30 a.m. (PST)

In this webinar, we provided an update on actions taken in accordance with Strategic Resource Directions from the 2017-2018 Integrated Resource Plan.

Overview of Topics

  • 2017-2018 Integrated Resource Plan Refresh
  • 2017-2018 Integrated Resource Plan Strategic Direction Progress
  • System Planning Foundations (Distribution, Transmission and Load Growth)

Webinar 1 Documents

ISP Summer Series Meeting 2: "Near-Term Planning"

July 22, 2021, 10 a.m.–noon (PST)

In this webinar, we educated stakeholders and discussed the forces of change affecting the industry and SRP’s near-term 2021-2024 planning focus.

Overview of Topics

  • Integrated Resource Plan to Integrated System Plan transition
  • Current planning environment
  • Near-term reliability challenges and solutions

Webinar 2 Documents

ISP Summer Series Meeting 3: "Where We Want to Go"

Aug. 16, 2021, 8:30–10:00 a.m. (PST)

Engaged stakeholders in early development of the ISP.

Overview of Topics

  • IRP to ISP transition topics
  • ISP stakeholder involvement & education opportunities

Webinar 3 Documents

ISP Summer Series Meeting 4: "Near-Term Planning: Part 2"

Aug. 23, 2021, 10 – 11:30 a.m. (PST)

In this webinar, we informed stakeholders about the next decision in SRP’s near-term plan.

Overview of Topics

  • SRP’s next resource decision in the near-term “AND” strategy

Webinar 4 Documents

Related links

SRP will not be providing additional stakeholder updates on the 2017-2018 IRP following the February 2021 Appendix publication.