Notice of Filing and Public Hearing Dominion Energy South Carolina, Inc.'s 2026 Integrated Resource Plan (IRP)Docket No. 2026-9-E Why is this Notice Important? On March 31, 2026, Dominion Energy South Carolina, Inc. (the "Company") filed its 2026 Integrated Resource Plan with the Public Service Commission of South Carolina ("Commission"). This Notice is for customers of Dominion Energy South Carolina, Inc. and interested persons. The Public Service Commission has scheduled a public hearing in this case. What is an Integrated Resource Plan? An Integrated Resource Plan is an electric utility's forecast or prediction of the electric utility's resources needed to provide you with safe, reliable electricity in the future. Essentially, it is a utility's strategic operational plan for the next 15 years that considers both customers' demand for electricity and the utility's ability to supply it. The case was filed according to S.C. Code Ann. Section 58-37-40 and Commission Order No. 2025-468; and this hearing has been scheduled according to S.C. Code Ann. Section 58-37-40 and Commission Order No. 2025-468 and S.C. Code Ann. Regs. 103-817. For the entire Case visit: https://dms.psc.sc.gov/Web/Dockets/Detail/119499 A public hearing has been scheduled in this case to begin on Monday, November 9, 2026, at 10:00 a.m., at the Public Service Commission, Hearing Room, 101 Executive Center Drive, Columbia, SC 29210. Intervention deadline: Friday, June 19, 2026 Manner of filing Intervention: Email a Petition to Intervene to contact@psc.sc.gov or mail a Petition to Intervene to 101 Executive Center Drive, Suite 100, Columbia, SC 29210. Please include your email address. You must give a copy of your Petition to Intervene to all Parties in this case. Manner to file Letters of Protest: File Public Comments or Letters of Protest by emailing contact@psc.sc.gov or mail Public Comments or Letters of Protest to 101 Executive Center Drive, Suite 100, Columbia, SC 29210. For questions regarding this filing, contact the Office of Regulatory Staff at 1-800-922-1531, the South Carolina Department of Consumer Affairs at 1-800-922-1594, Dominion Energy South Carolina, Inc. 1-800-251-7234, or for public information on this filing, contact the Public Service Commission at 1-803-896-5100. 4/14/26 GRR IPL0332585 Apr 22 2026