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Data center campus · 4810 Stonewall Tell Road, Union City, Fulton County, Georgia

Microsoft Union City campus (Project Steamboat)

Approved as of June 25, 2024

A 324 MW, three-building EdgeConneX campus in Union City with Microsoft as end user; the project won a $75 million Fulton tax abatement in 2024. Also known as: EdgeConneX ATL11-ATL13, Project Steamboat, ATL11, ATL12, ATL13.

Cite← Georgia data centers
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Power324MW reported · stated
Floor area2,100,000sq ft
Site136acres

Who is behind it

ProjectMicrosoft Union City campus (Project Steamboat)Also: EdgeConneX ATL11-ATL13, Project Steamboat, ATL11, ATL12, ATL13
Developer and teamEdgeConneX
TA Realty
Burr Computer Environments (site developer)
End userMicrosoft

The record, newest first

  1. EdgeConneX's Atlanta data sheet listed ATL11-ATL13 in Union City as a 202 MW block still to be completed. (EdgeConneX, July 1, 2026)

  2. Trade press placed the 63-acre site in Union City, reported $75 million in Fulton development-authority incentives and named Microsoft as the reported user. (CommercialSearch, July 19, 2024)

  3. Planning documents showed a 2.1 million sq ft, 324 MW campus with Microsoft as end user and a first phase due in 2026. (The Atlanta Journal-Constitution, July 17, 2024; Data Center Frontier, July 18, 2024)

  4. TA Realty and EdgeConneX announced a 324 MW hyperscale campus in metro Atlanta, with TA Digital Group handling power, zoning and permits and EdgeConneX handling design, construction and operations. (Business Wire (TA Realty / EdgeConneX), July 16, 2024)

  5. Develop Fulton voted 5-3 for a $75 million, 10-year tax abatement for the $1.8 billion Stonewall Tell Road project. (The Atlanta Journal-Constitution, June 25, 2024)

  6. Microsoft bought about 136 acres near South Fulton Parkway for data centers. (The Atlanta Journal-Constitution, April 16, 2024)

Conflicts and open questions

  • Land price differs: $52.5 million (AJC, deeds) vs $53.5 million (DCF).
  • Build status after 2024 not confirmed in a citable source; a tracker lists it under construction for 2027.
  • Distinct from the Palmetto/East Point campus in microsoft-east-us-3.
  • (folded from duplicate record edgeconnex-ta-union-city) MW figure differs: 324 MW at announcement vs. 202 MW in the operator's 2026 data sheet.
  • (folded from duplicate record edgeconnex-ta-union-city) Data sheet date is the month in its URL path (2026-07).
  • CommercialSearch described a site of nearly 63 acres, versus about 136 acres in AJC and Data Center Frontier; acres kept at 136.
  • Possible overlap: the AJC placed this tract close to Microsoft's Palmetto campus, which is in existing record microsoft-east-us-3; editor should confirm it is not counted twice.

The full record

Status note
The Development Authority of Fulton County had approved incentives by July 2024; EdgeConneX's 2026 data sheet still lists the three buildings as not yet complete.
Power note
Announced at 324 MW in 2024; EdgeConneX's Q1 2026 data sheet lists 202 MW for ATL11-ATL13 combined.
Evidence
News reports; primary records not yet obtained
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.