Integrated System Plan
SRP has identified strategies to guide power system planning through 2035.
What is an Integrated System Plan?
We are one of the first U.S. utilities to shift from an Integrated Resource Plan (IRP) to an Integrated System Plan (ISP). While an IRP focuses solely on generation resources, an ISP plans for the entire power system in one process and integrates a variety of community stakeholder and customer perspectives.
This first ISP serves as a holistic roadmap for the power system of the future. It considers evolving customer needs for reliability, affordability and sustainability while also achieving our 2035 Sustainability Goals.
Companion documents
View the ISP Executive Summary and other companion documents to learn more.
The why
SRP is currently experiencing changes driven by rapid economic growth, supply chain challenges, regulatory changes, climate change, and the increasing momentum behind decarbonization and electrification.
Given the rapid pace of change in the power industry, minimizing risk and meeting our customers’ needs over the next decade will require a complete transformation of the SRP power system, including:
- How, when and where we generate and store electricity
- How we deliver electricity over our transmission and distribution systems
- How we engage with our customers through rate design and customer programs
The why
SRP is currently experiencing changes driven by rapid economic growth, supply chain challenges, regulatory changes, climate change, and the increasing momentum behind decarbonization and electrification.
Given the rapid pace of change in the power industry, minimizing risk and meeting our customers’ needs over the next decade will require a complete transformation of the SRP power system, including:
- How, when and where we generate and store electricity
- How we deliver electricity over our transmission and distribution systems
- How we engage with our customers through rate design and customer programs
Key findings
During our ISP analysis, we studied how customer needs, infrastructure buildout and operations could evolve under a wide range of future scenarios and uncertainties. We also learned how our actions can influence reliability, affordability and sustainability.
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We will need to double or triple resource capacity over the next decade. -
A least-cost energy portfolio combines new renewables with conventional power sources.
In a high load growth scenario, without firm* power sources, the power system cannot satisfy reliability requirements. -
We will need to evolve customer programs to help shift consumer behavior.
We will need to make significant investments in new and upgraded transmission and distribution infrastructure.
We will need to double or triple resource capacity over the next decade.
A least-cost energy portfolio combines new renewables with conventional power sources.
In a high load growth scenario, without firm* power sources, the power system cannot satisfy reliability requirements.
We will need to evolve customer programs to help shift consumer behavior.
We will need to make significant investments in new and upgraded transmission and distribution infrastructure.
*Firm resources include reliable power sources at all hours and over long durations.
Based on what we learned from the key findings, SRP will need to implement the following System Strategies:
Going forward
By planning for the entire power system within one process, we can identify solutions across the entire system and how those solutions must work together to better serve our customers. Looking ahead, here are some things our customers can expect from us:
- New energy infrastructure to help meet the Valley’s needs
- Increased education about when to consume and conserve energy
- More opportunities for electric vehicle (EV) charging programs
- Expansion of electrification program offerings
Resources
Want to learn more?
Explore our document repository for a full list of available resources from SRP’s ISP process and analysis.
ISP Study Plan Documents
- Summary Study Plan for SRP’s Integrated System Plan (Updated)
- SRP’s Integrated System Plan Scenario Narratives (Updated) (Study Plan Companion Document)
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
- ISP Advisory Group Charter
- Updated Charter
- Meeting 1 Agenda
- Meeting 1 Presentation
- Meeting 1 Follow-Up Questions
- ISP Advisory Group Meeting 1 Meeting Summary
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
- Agenda
- ISP AG Optional Modeling Subgroup Meeting 2 Presentation
- ISP AG Optional Modeling Subgroup Meeting 2 Summary
Advisory Modeling Subgroup Meeting 3: Inputs for the ISP Study Plan – Part 2
April 4, 2022 1–2:30 p.m. (MST)
Meeting Documents
- Agenda
- ISP AG Optional Modeling Subgroup Meeting 3 Presentation
- ISP AG Optional Modeling Subgroup Meeting 3 Summary
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
- Agenda
- ISP AG Optional Modeling Subgroup Meeting 4 Presentation
- ISP AG Optional Modeling Subgroup Meeting 4 Summary
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
ISP Actions Update
Oct. 18, 2024 12:00 p.m. - 4:10 p.m. (MST)
Meeting Documents
Summer Series Recap
To see a summary from the Summer Series stakeholder engagements, view the ISP Summer Series Summary Report
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
- 2017-18 Integrated Resource Plan Report
- 2017-18 Integrated Resource Plan Report Appendix A: February 2019
- 2017-18 Integrated Resource Plan Report Appendix B: February 2020
- 2017-18 Integrated Resource Plan Report Appendix C: February 2021
SRP will not be providing additional stakeholder updates on the 2017-2018 IRP following the February 2021 Appendix publication.
