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If stakeholders identify alternative data sources or inputs for commodity forecasting, is there an opportunity for those inputs to be considered by Dominion Energy or ICF as part of the IRP process?

ICF develops the commodity forecasts used in the IRP using its own methodologies and professional judgment, informed by public data sources, market information, and its experience working with utilities, regional transmission organizations, and governmental entities. As the third party forecasting expert, ICF determines which data sources and inputs are appropriate for inclusion in its forecasts.

Dominion Energy incorporates ICF’s base forecasts into the IRP and evaluates sensitivities around those forecasts to reflect a range of potential outcomes.
Transparency is supported through documentation of key assumptions and through comparison with historical IRP filings and alternative perspectives raised during the stakeholder process. As with other elements of the IRP, forecasting approaches and assumptions may continue to evolve over time as new information becomes available.

While individual stakeholder suggestions may not directly modify ICF’s proprietary forecasting methodology, stakeholder input, regulatory staff analyses, and alternative viewpoints provided through the IRP process are reviewed and considered as part of a broader evaluation, including in the development of sensitivities where appropriate.

Other Stakeholder Questions and Answers

• How are projected transmission costs for future units that may not have gone through the RTEP treated in the IRP?
• As the Company continues to transition to more renewables, to what extent have you explored the use of real time/dynamic pricing as a way to shift customer demand in its IRP modeling and by what year would the Company begin implementing such a pricing model?