What we're tracking

The lines, substations and data center sites we follow, with every proceeding and filing about each one.

Data as of
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  • Existing
  • Proposed or under review
  • Golden to Mars: Route 3A (approved June 29, 2026)
  • Operating
  • Under construction
  • Proposed

What this map shows: Each tracked item is drawn at its site or along its route, with routes that were proposed but not chosen shown dashed. Locations marked approximate are not survey-accurate.

Data as of

All tracked items

Active · Data center
AWS on the former GW campus (Bridgefield Tech Center)

Amazon bought George Washington University's Ashburn campus for $427 million and filed a site plan for data center buildings there. On Oct. 20, 2026 the county announced Amazon will drop its data center plans and donate 25 acres to the county.

Algonkian2 proceedings
Last changed
Active · Other
Dominion and NextEra merger

NextEra Energy's proposed acquisition of Dominion Energy, Loudoun's electric utility, before the SCC as PUR-2026-00112. Public witness hearings Nov. 5, 9 and 10; evidentiary hearing from Nov. 17, 2026.

Algonkian · Ashburn · Broad Run · Catoctin · Dulles · Leesburg · Little River · Sterling1 proceeding
Last changed
Active · Line
Golden to Mars

Dominion's 500 kV and 230 kV lines between the Golden and Mars substations in eastern Loudoun. The SCC approved Route 3A on June 29, 2026, and the decision is on appeal.

Sterling · Dulles3 proceedings
Last changed
Active · Part of Golden to Mars
Golden Substation

Dominion's 500 kV substation near Route 28, Pacific Boulevard and the W&OD Trail in Sterling, where Golden to Mars begins. The Board votes on it Nov. 5, 2026.

Sterling6 proceedings
Last changed
Active · Line
Morrisville to Wishing Star

Dominion's 36.6-mile 500 kV line from Fauquier County through Prince William to the Wishing Star Substation near Arcola, with a 4.4-mile rebuild in Loudoun. SCC hearing starts Nov. 16, 2026.

Dulles1 proceeding
Last changed
Active · Line
Valley Link: Valley North 765 kV line

A proposed 765 kV overhead line from West Virginia to Frederick County, Maryland, with study segments through northwestern Loudoun near Lovettsville. No SCC application yet; filing expected in 2027.

Catoctin2 proceedings
Last changed
Built · Data center
Vantage VA2, Sterling

A Vantage Data Centers campus on Glenn Drive in Sterling that runs on on-site gas turbines because the grid cannot yet serve it. Vantage says it does not expect a grid connection until 2040.

Sterling3 proceedings
Last changed
Active · Data center
Yondr Tarring data center

A pending special exception for a data center on about 11 acres at Youngwood Lane and Briarfield Lane in the Dulles District, next to Yondr's existing campus. A legislative application, so the Board's pause would apply.

Dulles3 proceedings
Last changed