Stakeholder center

2022-2023 Transmission planning process

Started: Jan 13, 2022

Leads
Jeff Billinton

The California ISO 2022-2023 transmission planning cycle involves key stakeholder activities from 2022 through early 2023. Each year, the ISO conducts its transmission planning process to identify potential system limitations as well as opportunities for system reinforcements that improve reliability and efficiency. The transmission planning process core product is the ISO Transmission Plan, which provides an evaluation of the ISO control grid, examines conventional grid reliability requirements and projects, summarizes key collaborative activities and provides details on key study areas and associated findings.

Relevant notices Contact us

Status

Development Decision Implementation Completed/Closed
Jun 30, 2023 Final study plan posted
May 18, 2023 Board of Governors approval - transmission plan
 Completed

Activities

2022-2023 Transmission Planning Process North of SONGs - Serrano 500kV Line Project Accrued Final Costs 08/02/2024


Imperial Valley - North of SONGs 500kV Substation and Line Project - Accrued Final Costs 07/15/2024


North Gila - Imperial Valley Project Accrued Final Costs 06/24/2024


North of SONGS-Serrano 500 kV Line Project Sponsor Selection Report 05/31/2024


Imperial Valley-North of SONGS Project Approved Project Sponsor Report 05/09/2024


North Gila-Imperial Valley 2 500kV Line Project Sponsor Selection Report - Final Report 04/11/2024


Revised Schedule - 2022-2023 Transmission Planning Process - Phase 3 Sequence 04/08/2024


Qualified project sponsor applications

List of Qualified Project Sponsor Application North Songs to Imperial Valley 500kv Substation and Transmission Line Project 01/26/2024

List of Qualified Project Sponsor Applications - North of SONGS to Serrano 500kV Transmission Line Project 02/09/2024

Web meeting

ISO Responses to Comments - 2022-2023 Transmission Planning Process - Nov 7, 2023 Stakeholder Meeting 12/11/2023

Presentation - 2022-2023 Transmission Planning Process - Nov 7, 2023 11/03/2023

Idaho Power Letter to CAISO Regarding SWIP North 11/03/2023

View comments


Qualified project sponsor applications

List of Qualified Project Sponsor Applications - North Gila to Imperial Valley 2 500kV Transmission Line Project 01/11/2024


Validated project sponsor applications

List of Validated Project Sponsor Applications - North Gila to Imperial Valley 2 500kV Transmission Line Project 11/20/2023

List of Validated Project Sponsor Applications - North of SONGS to Imperial Valley 500kV Substation and Transmission Line Project 12/05/2023

List of Validated Project Sponsor Applications - North of SONGS to Serrano 500kV Transmission Line Project 12/19/2023

Phase 3 - select project sponsor

Project sponsors submit proposals for transmission solutions that are eligible for competitive solicitation and were approved by the ISO Board in the comprehensive transmission plan at the end of phase 2.

Web meeting

Competitive Solicitation

Cost and Cost Containment Workbook - 2022-2023 Transmission Planning Process Phase 3 10/10/2023

ISO Responses to Comments Matrix - 2022-2023 Transmission Planning Process Competitive Solicitation 10/10/2023

Key Selection Factors - 2022-2023 Transmission Planning Process 07/07/2023

2022-2023 - Transmission Planning Process Phase 3 Sequence Schedule 06/16/2023

Presentation - 2022-2023 Transmission Planning Process - Phase 3 Competitive Solicitation - Jun 26, 2023 06/22/2023

Phase 2 - conduct technical studies and develop comprehensive plan

The ISO performs technical studies, and with stakeholders develops an annual comprehensive transmission plan that examines the ISO controlled grid and reliability requirements and identifies mitigation solutions. Transmission mitigation solutions may meet reliability, economic or public policy-driven needs that support state, federal, municipal and county policy requirements and directives.The ISO performs technical studies, and with stakeholders develops an annual comprehensive transmission plan that examines the ISO controlled grid and reliability requirements and identifies mitigation solutions. Transmission mitigation solutions may meet reliability, economic or public policy-driven needs that support state, federal, municipal and county policy requirements and directives.


ISO Board Approved 2022-2023 Transmission Plan 05/22/2023

Appendix A - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix B - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix C - Board Approved 2022-2023 -Transmission Plan 05/22/2023

Appendix D - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix E - Board Approved 2022-2023 -Transmission Plan 05/22/2023

Appendix F - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix G - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix H - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix I - Board Approved 2022-2023 - Transmission Plan Revised 08/24/2023

Appendix J - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Appendix K - Board Approved 2022-2023 - Transmission Plan 05/22/2023

Addendum 1 - Board Approved - 2022-2023 Transmission Plan 12/14/2023


Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix A - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix B - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix C - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix D - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix E - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix F - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix G - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix H - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix I - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix J - Revised Draft 2022-2023 Transmission Plan 05/10/2023

Appendix K - Revised Draft 2022-2023 Transmission Plan 05/10/2023


Alternatives to Trout Canyon-Lugo 500 kV

Letter - Lotus Infrastructure Partners - Apr 24, 2023 05/18/2023

Letter - GridLiance West - May 17, 2023 05/18/2023

Letter - NextEra Resources - May 17, 2023 05/18/2023

Letter - Coalition for Optimization of Renewable Development - May 31, 2023 06/01/2023

Web meeting

Agenda - 2022-2023 Transmission Planning Process - Apr 11, 2023 04/07/2023

Presentation - 2022-2023 Transmission Planning Process - Apr 11, 2023 04/10/2023

Draft 2022-2023 Transmission Plan 04/03/2023

Appendix A - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix B - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix C - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix D - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix E - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix F - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix G - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix H - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix I - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix J - Draft 2022-2023 Transmission Plan 04/03/2023

Appendix K - Draft 2022-2023 Transmission Plan 04/03/2023

Addendum 1 - Draft 2022-2023 Transmission Plan 12/06/2023

View comments


Letter received from President Reynolds, CPUC

Letter - 2022-2023 Transmission Planning Process - Jan 13, 2023 02/13/2023

Web meeting

Agenda - 2022-2023 Transmission Planning Process - Nov 17, 2022 11/15/2022

Presentation - 2022-2023 Transmission Planning Process - Nov 17, 2022 11/16/2022

ISO Responses to Comments - 2022-2023 Transmission Planning Process - Nov 17, 2022 04/11/2023

View comments

Web meeting

Day 2 of a two-day meeting

Agenda - 2022-2023 Transmission Planning Process - Sep 27-28, 2022 09/23/2022

Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022

GLW Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022

PG&E Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022

SCE Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022

SDGE Presentation - 2022-2023 Transmission Planning Process - Sep 28, 2022 09/23/2022

ISO Responses to Comments - 2022-2023 Transmission Planning Process - Sept 27-28, 2022 11/16/2022

View comments

Web meeting

Day 1 of a two-day meeting

Agenda - 2022-2023 Transmission Planning Process - Sep 27-28, 2022 09/23/2022

Presentation - 2022-2023 Transmission Planning Process - Sep 27, 2022 09/23/2022


Reliability assessment

2022-2023 Preliminary Reliability Assessment Results 08/15/2022

2022-2023 Final Reliability Results 10/31/2022

Web meeting

2022-2023 Transmission Planning Process - Portfolio Transmittal Letter 07/01/2022

CAISO Presentation - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/01/2022

CEC Presentation - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/01/2022

CPUC Presentation (Updated) - 2022-2023 Transmission Planning Process - Jul 6, 2022 07/06/2022

View comments

Phase 1 - develop study plan

In collaboration with stakeholders, the ISO develops and finalizes a study plan that consists of a common set of assumptions for reliability and other planning studies the ISO will perform in Phase 2. The development of a conceptual statewide transmission plan begins in this phase and may be completed during Phase 1 or Phase 2. Stakeholders may also request economic planning studies to assess potential economic benefits (such as congestion relief) in specific areas of the grid.


Final Study Plan - 2022-2023 Transmission Planning Process 06/30/2022

Web meeting

ISO Responses to Comments Matrix - 2022-2023 Transmission Planning Process - Feb 28, 2022 07/06/2022

Presentation - 2022-2023 Transmission Planning Process - Feb 28, 2022 02/24/2022

Draft Study Plan - 2022-2023 Transmission Planning Process 02/18/2022

View comments