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Board backs letter supporting proposed underground HVDC line and asks consultant analysis on moving power to Data Center Alley

Loudoun County Board of Supervisors · December 2, 2025
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Summary

The Board voted to send a support letter for Dominion’s proposed largely‑underground HVDC transmission project into the Mosby substation and directed staff to expand the county’s consultant scope to study engineering and cost options for routing HVDC power from Mosby to data‑center load centers; the actions passed after extended debate.

On Dec. 2 the Board authorized (1) a letter of support to PJM Interconnection and Dominion Energy Virginia for a proposed mostly‑underground high‑voltage DC (HVDC) transmission proposal that would terminate at Mosby substation, and (2) a tasking for county staff to request a scope and fee from the County’s existing electrical‑infrastructure consultant to study options to move HVDC capacity from Mosby toward “Data Center Alley.”

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