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Data Centres: Boom and Backlash
17JUN

Prince William denies a 43m sq ft campus

2 min read
10:13UTC

Prince William County supervisors voted 8-0 on 7 July to reject the Dulles South data-centre campus, using zoning powers the county already held rather than a lawsuit or new statute.

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Key takeaway

Prince William blocked a giant campus with standing zoning, a refusal far harder to overturn than a moratorium.

The Prince William County Board of Supervisors voted 8-0 on Tuesday 7 July to deny the Dulles South Innovation Center, a 1,940-acre, 43-million-square-foot data-centre campus proposed by Sanders Lage Assemblage I LLC in the Gainesville district. 1 Prince William sits at the western edge of the world's densest data-centre cluster, so a refusal here carries weight a rural county's would not. County staff had recommended denial because the site lay outside the Data Center Opportunity Zone Overlay District, the area zoned for such builds.

Supervisors cited the Occoquan watershed, which supplies drinking water to eight million people, and rejected what they called piecemeal development outside the county's 2040 Comprehensive Plan. No lawsuit, no new statute, no moratorium.

This was the county's second mega-rejection of 2026, and the more durable one. The neighbouring Digital Gateway campus died by a court ruling that voided its fast-track rezoning, and its developers dropped their remaining appeals the same week . Dulles South died by ordinary zoning, a refusal no appeal can easily reopen because the county simply applied rules it already held.

The demand behind the refusal has not moved: 43 million square feet of proposed capacity, in the busiest data-centre market on earth, blocked by tools already on the books.

Deep Analysis

In plain English

A Virginia county government voted unanimously, 8 to 0, to block a huge proposed data-centre complex, nearly 2,000 acres and 43 million square feet of buildings, because it would have put the local drinking-water supply at risk. The company behind the project, Sanders Lage Assemblage I LLC, will need a different site or a smaller plan if it wants to build in the area. This is the second major data-centre rejection in the same county in recent months. This time all eight supervisors voted to say no, well beyond the smaller faction that had opposed Digital Gateway.

Deep Analysis
Root Causes

The Occoquan watershed is the structural reason this vote succeeded where a purely procedural challenge like Digital Gateway's notice failure would not have: it supplies drinking water to roughly eight million people, giving supervisors a public-health rationale that survives legal challenge in a way a zoning-notice technicality does not.

Sanders Lage Assemblage I LLC's 43-million-square-foot proposal also arrived without the settlement leverage some Virginia developers have used elsewhere, such as pre-negotiated power or infrastructure deals; a raw rezoning ask, with no community commitments attached, gave the board nothing to trade against the water-supply risk.

What could happen next?
  • Precedent

    A unanimous denial on watershed grounds gives Prince William a rationale other Virginia counties can cite without relitigating zoning-notice procedure.

  • Consequence

    Sanders Lage Assemblage I LLC loses its Gainesville district site and must either resubmit at reduced scale or pursue a different county.

Sources:WTOP
Mentions:Prince William County →Dulles South Innovation Center →Occoquan watershed →Digital Gateway →Virginia Court of Appeals →Northern Virginia →Virginia →
First Reported In

Update #10 · New York freezes data centres by decree

WTOP· 15 Jul 2026
Read original →
Causes and effects
Caused by
Prince William ends Digital Gateway fight
Prince William's Dulles South denial follows the same county's earlier Digital Gateway rezoning collapse and dropped appeal.
Occurred 10 May 2026
Read story →
This Event
Prince William denies a 43m sq ft campus
Virginia's densest data-centre county blocked a 43-million-square-foot campus with ordinary zoning, the most durable tool available.
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