Notice of Filing and Public Hearing Joint Application of Duke Energy Carolinas, LLC, North Carolina Electric Membership Corporation, and Central Electric Cooperative, Inc. for a Certificate of Environmental Compatibility and Public Convenience and Necessity for the Construction and Operation of a New Combined Cycle Generating Plant in Anderson County, South Carolina (See Also ND-2025-42-E) Docket No. 2025-250-E Why is this Notice Important and What is the Project in this case? • Duke Energy Carolinas, LLC (“DEC” or “Company”), the North Carolina Electric Membership Corporation (“NCEMC”), and Central Electric Power Cooperative, Inc. (“Central,” and together with DEC and NCEMC, the “Joint Applicants”) filed an application for a Certificate of Environmental Compatibility and Public Convenience and Necessity (“CECPCN”) with the Public Service Commission of South Carolina (the “Commission”). • The Joint Applicants request permission to construct a new natural gas combined cycle generating plant and associated facilities, including a new multi-breaker 230 kV switching station and the fold-in of the existing Chickasaw B/W 230 kV lines into the new switching station, in Anderson County (the “Project”). Project Construction and Operation of a Natural Gas Combined Cycle Electric Generating Plant and Associated Facilities Affected County Anderson County Design Capacity 1,365 megawatts Project Costs $3,218,000,000 Target Date for Commercial Operation End of 2030 Why are the Joint Applicants asking the Commission to issue a CECPCN in this case? • The Joint Applicants state that there are substantial, growing energy needs, and DEC anticipates an increase in annual energy need of 25,735,000 MWh between 2024 and 2031. • The Joint Applicants state that the Project is needed by NCEMC and Central as a capacity and energy resource to serve their respective member cooperatives’ loads. The case was filed according to S.C. Code Ann. Sections 58-33-10 et seq., 58-37-100 et seq. and S.C. Code Ann. Regs. 103-304 and 103-825 and 103-823, and a hearing has been scheduled according to S.C. Code Ann. Section 58-33-130 and S.C. Code Ann. Regs. 103-817. A public hearing has been scheduled in this case to begin on Wednesday, January 28, 2026, at 10:00 a.m., with only attorneys present and no witnesses, and reconvening on February 25, 2026, at 10:00 a.m., to receive evidence and to hear from witnesses, and continuing, if necessary, on February 26, 2026, at the call of the Chairman, at the Public Service Commission, Hearing Room, 101 Executive Center Drive, Columbia, SC 29210. For information on this entire Case, visit: https://dms.psc.sc.gov/Web/Dockets/Detail/119473 Intervention deadline: Friday, December 12, 2025 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, DEC at 1-888-810-0421, NCEMC at 1-919-875-3111, Central at 1- 803-779-4975, or for public information on this filing contact the Public Service Commission at 1- 803-896-5100 November 12, 2025 GRR