• Microsoft filed with the US Army Corps of Engineers for its proposed MNZ07 Wellington Data Center in Prince William County, Virginia
  • The 123-acre plan includes two single-storey data-centre buildings and an on-site substation near Gainesville

The fact

Microsoft has filed an application with the US Army Corps of Engineers, Norfolk District, for the proposed MNZ07 Wellington Data Center at 13490 University Boulevard in Prince William County, Virginia. The 123-acre site near Gainesville would contain two single-storey data-centre buildings and an on-site substation. The property lies east of University Boulevard, south of Interstate 66 and north of Wellington Road.

The Army Corps regulates certain work affecting waters and wetlands under Section 404 of the Clean Water Act. The filing therefore identifies a federal environmental-permitting step for the project, separate from local land-use approvals. Microsoft has not disclosed the campus's planned power capacity, construction start or target energisation date. The application also does not establish the voltage or capacity of the proposed substation.

The assessment

The filing shows that Microsoft has more than local planning and power arrangements to work through before the campus can be built. Where a site affects regulated waters or wetlands, the federal permitting process can add design, mitigation and review requirements alongside county approvals.

That matters because changing a site layout to reduce environmental impacts can affect roads, buildings and utility infrastructure already being planned. The proposed on-site substation adds another major piece of infrastructure to coordinate, although the filing does not show how Microsoft intends to connect it to the wider grid.

For BTW readers, the Army Corps application identifies another dependency in the project's development path. Progress will depend not only on securing land and electricity but also on whether the final campus design can satisfy the environmental conditions attached to the site.

What to watch

Watch for the Army Corps public notice and details of the wetlands or waterways affected by the project. Any required mitigation or design changes will show how much the federal review influences the campus layout. Power filings, construction permits and a disclosed MW figure would provide a clearer view of when the project could move towards delivery.