What is an integrated resource plan (IRP)?

Integrated resource plans (IRPs) are electricity providers’ plans for meeting projected customer demand for at least a 15-year period in an economical and reliable way, while maintaining flexibility and considering environmental consequences.

Who prepares IRPs? How often?

Electricity providers prepare IRPs at least every three years. The term ‘electricity providers’ includes investor-owned electrical utilities (IOUs),the South Carolina Public Service Authority (Santee Cooper), electric cooperatives, and municipally owned electric utilities. IOUs must also submit annual updates to their IRPs.

Investor-Owned Utilities (IOUs)

Investor-owned utilities (IOUs) submit their IRPs to the Public Service Commission of South Carolina (PSC). The PSC will review each IRP and must approve, modify, or deny an IRP within 300 days. Interested parties may also intervene (please see the PSC website for more information). If the PSC modifies or rejects an IRP, the IOU has 60 days to submit a revised plan. The ORS will then review the plan and report its findings to the PSC. Then, the PSC has 60 days to accept the plan or require further changes.   

IOUs must also submit annual updates to their respective IRPs. These updates describe how changes in assumptions impact the plan. The ORS reviews annual updates and provides a recommendation to the PSC. The PSC can accept the updates or require changes.

If an IOU seeks permission from the PSC to build a generation plant of more than 75 MW or transmission of 125 kV or more, the PSC may require that the facility is consistent with that IOU’s IRP.

Dominion Energy South Carolina

• 2023 Dominion Energy South Carolina IRP (PDF)
• Updates and additional information on the 2023 Dominion Energy South Carolina IRP

Duke Energy Carolinas/Progress

• 2023 Duke Energy Carolinas/Progress IRP

Lockhart Power 

• 2023 Lockhart Power IRP (PDF)

South Carolina Public Service Authority (Santee Cooper)

Santee Cooper must develop its IRP in consultation with its electric cooperative and municipal utility customers. Santee Cooper submits its IRP to the SC Public Service Commission.

• 2023 Santee Cooper IRP (PDF)
• Updates on the 2023 IRP

Electric Cooperatives

Distribution electric cooperatives (i.e., that do not provide generation or transmission) that are members of a wholesale cooperative, such as Central Electric Power Cooperative, may coordinate and consolidate their IRP into a single plan. Electric Cooperatives submit their IRPs to the Energy Office.

• 2023 Central Electric Power Cooperative IRP (PDF)

Municipal Utilities

Municipal utilities submit their IRPs to the Energy Office.

• 2023 City of Clinton IRP (PDF)
• 2023 Easley Combined Utilities IRP (PDF)
• 2023 Gaffney Board of Public Works IRP (PDF)
• 2023 City of Georgetown IRP (PDF)
• 2023 Greenwood Public Works IRP (PDF)
• 2023 McCormick Commission of Public Works IRP (PDF)
• 2023 City of Rock Hill IRP (PDF)
• 2023 City of Newberry IRP (PDF)
• 2023 Bamberg Board of Public Works IRP (PDF)
• 2023 City of Camden IRP (PDF)
• 2023 Seneca Light & Water IRP (PDF)
• 2023 Laurens Commission of Public Works IRP (PDF)
• 2023 City of Westminster IRP (PDF)
• 2023 City of Bennettsville IRP (PDF)
• 2023 City of Union IRP (PDF)
• 2023 City of Abbeville Public Utilities IRP (PDF)
• 2023 Town of Prosperity IRP (PDF)
• 2023 Town of Due West IRP (PDF)
• 2024 City of Orangeburg Public Utilities IRP (PDF)
• 2023 Town of Winnsboro IRP (PDF)
• 2024 Greer Commission of Public Works IRP (PDF)

View Past IRPs