Operational Update on Wyoming County Transformer Mineral Oil Release Response
Summary
The West Virginia DEP and Appalachian Power report that containment measures following a transformer mineral oil release at a Wyoming County substation successfully captured escaped material. On February 11, 2026, increased river flow from snowmelt pushed debris and ice downstream, impacting containment structures near the Guyandotte River confluence. Redundant containment systems downstream remain intact and are now serving as primary containment lines. No material has been observed in R.D. Bailey Lake, where multiple containment systems remain active and crews continue monitoring.
“Containment measures established by the West Virginia Department of Environmental Protection (WVDEP) and Appalachian Power following the transformer mineral oil release at a Wyoming County substation successfully captured material that escaped primary containment.”
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What changed
The West Virginia DEP issued an operational status update on the ongoing response to a transformer mineral oil release at a Wyoming County substation. Containment measures established by WVDEP and Appalachian Power successfully captured material that escaped primary containment, though increased river flow from snowmelt on February 11 impacted several upstream containment structures near the confluence with the Guyandotte River. Redundant downstream systems at the Guyandotte River and R.D. Bailey Lake remain intact and are now the primary containment lines. Environmental cleanup crews are repositioning equipment and installing additional controls as needed.
Affected parties include Appalachian Power and other utilities operating substation infrastructure in flood-prone areas near West Virginia waterways. While no penalties or compliance obligations are stated, operators should note that regulatory agencies expect redundant containment systems for such incidents, and that snowmelt-driven high-flow events can compromise upstream barriers, requiring reliance on downstream redundancy.
Archived snapshot
Apr 22, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
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Operational update on Wyoming County mineral oil response
2/11/2026
CHARLESTON, W.Va. – Containment measures established by the West Virginia Department of Environmental Protection (WVDEP) and Appalachian Power following the transformer mineral oil release at a Wyoming County substation successfully captured material that escaped primary containment. On Wednesday, increased river flow from snowmelt and recent precipitation pushed debris and large sections of ice downstream, impacting several containment structures near the confluence with the Guyandotte River. This potential shift in conditions was anticipated, and multiple redundant containment systems were already in place farther downstream in the Guyandotte River and at R. D. Bailey Lake.
Those downstream systems remain intact and are now serving as the primary lines of containment.
Environmental cleanup crews are repositioning equipment and adjusting operations along the Guyandotte River while installing additional controls as needed.
At this time, no material has been observed in R.D. Bailey Lake. Multiple containment systems remain active at the lake, and crews continue monitoring.
WVDEP will maintain oversight of the response and provide updates as conditions warrant.
Contact:
304-926-0499
DEPCommunications@wv.gov
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