Get Full Government Meeting Transcripts, Videos, & Alerts Forever!
Get email alerts on the Infrastructure Energy topic
No spam. Unsubscribe anytime.
Commissioners split on Bent/Vint Hill substation; no final action taken
Summary
Dominion Energy presented an expansion plan for the Vint/Bent Hill substation and responded to questions about SF6 gas use and load forecasts. Commissioners raised concerns about massing and emissions; the commission took no final action and the item may proceed to the Board.
Dominion Energy briefed the Prince William County Planning Commission on Oct. 29 about the Vint (Bent) Hill substation expansion associated with SUP2025-00009. Presenters Tracy McDonald and subject-matter experts Jim Stage and Ninath Padil explained that the expansion uses northern parcel area to minimize proximity to Bent Hill Road and preserve existing operational equipment during construction.
Commissioners pressed the utility on use of SF6 (sulfur hexafluoride) in gas-insulated switchgear and on why some load-forecast filings show projected usage for the substation declining in later years despite an expansion. Jim Stage said Dominion follows state and federal laws and that recent SF6 policy changes elsewhere have focused on new manufacturing restrictions rather than an immediate operational ban; he said no equivalent state prohibition currently exists in Virginia and that, at the site’s voltage levels, an alternative technology is not presently available.
Commissioner questions referenced EPA data and a recent increase in reported SF6 emissions across Dominion systems; Dominion staff said they would follow up with environmental compliance experts. "We'll have to have a discussion with our environmental group," Jim Stage said when asked about the EPA numbers. Commissioners expressed concern about the visual massing of the expanded substation within a growing development area and noted system-level load modeling (PJM filings) in questioning.
Commissioner Carroll moved to deny SUP2025-00009 citing unresolved concerns about massing and contextual fit; the motion did not receive a second. A later motion to approve, made by the chair, also received no second. With no action taken, staff reminded the body that if the commission does not act by Dec. 9 (90 days from the first public hearing), the matter can move to the Board of County Supervisors. The commission asked Dominion to provide follow-up information, including confirmations on the apparent emissions increase.
Next steps: Dominion and staff will follow up on SF6 emissions questions and the commissioners’ technical queries; the commission may reconsider or the matter may advance to the Board if no local action is taken.
