Loudoun Grid Alert: "Golden to Mars" Enters Final Round as Undergrounding Debate Intensifies
February 11, 2026 — The battle over the final leg of the Ashburn reliability loop is reaching its climax. As of today, Case No. PUR-2025-00056 has moved to the desk of the Virginia SCC Commissioners for a final decision that could fundamentally change how data center-driven infrastructure is funded and built.
Following a massive public outcry in late 2025—which saw over 1,000 written comments and 600 witnesses flood the docket—the evidentiary phase concluded in mid-January. Here is the intelligence you need as we await the final order.
The "Golden to Mars" Status Report
Evidentiary Wrap-Up: The formal evidentiary hearing concluded on January 15, 2026. Intervenors, including Loudoun County, the Piedmont Environmental Council (PEC), and local HOAs, presented expert testimony challenging Dominion’s refusal to underground the most sensitive segments of the 500kV line.
The February 3rd Deadline: Closing legal briefs were filed just days ago. In a unified front, SCC staff and intervenors urged the Commission to move beyond a "business as usual" approval and address the root cause of the demand: the data center industry.
Final Order Timing: The SCC is expected to issue its Final Order in late Q1 or early Q2 2026. This ruling will determine the final route and whether Dominion will be forced to implement a "pilot program" for undergrounding.
Key Flashpoints for the Data Center Sector
The "Route 3A" Standoff
Dominion’s preferred "Route 3A" was introduced to skirt Loudoun County School Board property, but it has placed the 500kV giants directly in the backyards of the Loudoun Valley Estates. Residents are demanding a "500-foot buffer" rule: if the line comes within 500 feet of a home or school, it must go underground.
Cost Allocation: The "High-Load" Hammer
In a significant shift, the SCC Staff brief filed this month explicitly stated that "the time is more than ripe" to address cost allocation.
The Proposal: Intervenors are arguing that the "incremental costs" of mitigation—specifically the 4x–10x price tag of undergrounding—should be assigned exclusively to the high-load customer class (data centers) rather than being socialized across residential ratepayer bills.
The HVDC Alternative
While Dominion maintains that undergrounding 500kV AC lines is technically "unprecedented" (citing only the Chino Hills project in CA), a new 186-mile underground HVDC proposal from Brunswick to Loudoun has entered the PJM pipeline. This has undercut Dominion's "unfeasible" argument, as the technology for large-scale undergrounding is clearly being prioritized for other data center-focused corridors.
The Bottom Line
If the SCC mandates undergrounding or a "Data Center Only" cost recovery model for Golden to Mars, it will set a nationwide precedent. Data center developers in Northern Virginia may soon face direct infrastructure surcharges as the "social license" for above-ground high-voltage lines in residential areas has effectively expired.
