Resource Planning Advisory Group

Resource adequacy methodology and electric modeling for the 2027 ISP 5/15/25 | 1 p.m. – 3 p.m. Puget Sound Energy will host a virtual RPAG meeting on Thursday, May 15 from 1:00 p.m. to 3:00 p.m. PSE will discuss electric modeling for the 2027 Integrated System Plan (ISP), which includes updates on emerging resources, hydroelectric, and geothermal modeling as well as resource alternatives, alternative fuels, and generic resource costs. Additionally, E3 will provide an overview of resource adequacy methodology. Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE Integrated System Plan YouTube channel . Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Interested party feedback on the meeting topics received between May 8 and May 22, 2025 will be included in the meeting feedback report. Feedback may be submitted via online form, by email at isp@pse.com or via voicemail at 425-818-2051. How to join Register on Zoom to participate in the meeting You can also observe the meeting on YouTube

Customer strategy for the 2027 ISP 3/25/25 | 1 p.m. – 4 p.m. Puget Sound Energy will host a virtual RPAG meeting on Tuesday, March 25 from 1:00 p.m. to 4:00 p.m. PSE will discuss customer strategy, including conservation, demand response, and solar and storage for the 2027 Integrated System Plan (ISP). Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE Integrated System Plan YouTube channel . Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Interested party feedback on the meeting topics received between March 18 and April 1, 2025 will be included in the meeting feedback report. Feedback may be submitted via online form, by email at isp@pse.com or via voicemail at 425-818-2051. How to join Register on Zoom to participate in the meeting You can also observe the meeting on YouTube Meeting Materials Agenda Presentation Feedback report Meeting summary

Electric delivery system, regional and local transmission, and finalizing planning scenarios for the 2027 ISP 2/27/25 | 9 a.m. - 12 p.m. Puget Sound Energy will host a virtual RPAG meeting on Thursday, February 27 from 9:00 a.m. to 12:00 p.m. PSE will discuss the electric delivery system, regional and local transmission, and finalizing planning scenarios for the 2027 Integrated System Plan (ISP) Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE Integrated System Plan YouTube channel. Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Interested party feedback on the meeting topics received between Feb. 20 and March 6, 2025 will be included in the meeting feedback report. Feedback may be submitted via online form, by email at isp@pse.com or via voicemail at 425-818-2051. Meeting Materials Agenda Presentation Observe the meeting Meeting Summary Feedback Report

Scenarios and sensitivities and updated resource need 12/19/24 | 2 p.m. – 4 p.m. Puget Sound Energy will host a virtual RPAG meeting on Thursday, December 19 from 2 p.m. to 4 p.m. PSE will discuss planning scenarios and sensitivities and the updated resource need with RPAG members and provide an update on RPAG member recruitment and the public webinar process. Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE Integrated System Plan YouTube channel . Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Interested party feedback on the meeting topics received between Dec. 12 and Jan. 3, 2024 will be included in the meeting feedback report. Feedback may be submitted via online form, by email at isp@pse.com or via voicemail at 425-818-2051. Meeting Materials Agenda Presentation Meeting summary Feedback report

PSE is accepting applications for up to four new members for our Resource Planning Advisory Group (RPAG). The application is available now and we are accepting applications through Jan. 8, 2025. Please see the RPAG Charter for additional information on the RPAG purpose and membership. What is the Resource Planning Advisory Group? The Resource Planning Advisory Group or RPAG provides specialized technical feedback in support of PSE’s resource planning processes, with a primary focus on advising the development of the 2027 Integrated System Plan (ISP). RPAG Selection Puget Sound Energy will select up to four new RPAG members, in consultation with independent advisors, through a public application process. We encourage all applicants that meet the requirements below to apply as we seek to expand the RPAG with the best possible mix of experience and expertise. • Applicants must possess relevant education, expertise and/or professional experience in key fields relevant to energy resource planning or utility regulation. • Applicants must possess an organizational affiliation and approval to participate in the RPAG on the organization’s behalf. • Applicants will be expected to attend meetings during the 2027 ISP cycle leading to filing of the 2027 ISP. Apply here To view additional details about RPAG membership or to apply, please see the online RPAG application or request a paper version by emailing isp@pse.com or by leaving a voicemail at (425) 818-2051. The application window is open as of December 3, 2024. Applications are due January 8 by 5 p.m. for priority consideration, and candidates will be notified in February. For questions or help completing this application, please contact PSE at isp@pse.com or call (425) 818-2051.

Scenarios and sensitivities 10/29/24 | 2 p.m. – 4 p.m. Puget Sound Energy will host a virtual RPAG meeting on Tuesday, Oct. 29 from 2 p.m. to 4 p.m. PSE will discuss planning scenarios and sensitivities with RPAG members and provide an update on their clean energy interim targets. Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE Integrated System Plan YouTube channel . Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Interested party feedback on the meeting topics received between Oct. 22 and Nov. 5, 2024 will be included in the meeting feedback report. Feedback may be submitted via online form , by email at isp@pse.com or via voicemail at 425-818-2051. Meeting Materials Agenda Presentation Meeting summary Feedback report

2027 Integrated System Plan update 9/12/24 | 10 a.m. – noon Puget Sound Energy will host a virtual RPAG meeting on Thursday, Sept.12 from 10 a.m. to noon. PSE will provide an update on the 2027 Integrated System Plan. Please register in order to participate in this webinar, which will be held via Zoom. You do not need a Zoom account to join. Please contact Emilie Pilchowski at epilchowski@triangleassociates.com if you have questions or trouble registering. Members of the public wishing to watch the meeting without participating may watch a live stream of the meeting on the PSE IRP YouTube channel. Members of the public are invited to observe this meeting and provide public comment at the end of the webinar. Written feedback on the meeting topics received between Sept. 5 and Sept. 26, 2024 will be included in the meeting feedback report. Feedback may be submitted via online form , by email at isp@pse.com , or via voicemail at 425-818-2051. Meeting materials: Presentation Agenda Meeting Summary 2025 IRP feedback Feedback Report