Glenn's Digital Garden

Mount Pleasant

Mount Pleasant is the site of multiple Microsoft supercomputers1 partly on the land originally sited for a Foxconn factory.2 Microsoft maintains a public relations website about this project.3

Buildout

Mount Pleasant is the site of the following datacenters:

  • A Fairwater site (450 MW, 1.2m sqft, $3.3B)4
  • A second Fairwater site ($4B)56
  • 9x datacenters (580k sqft each)4
  • 6x datacenters (568k sqft each)4

Parcels

It is being developed in three separate phases:7

  1. 214 acres at the corner of 90th St and Highway KR, a 450 MW8 Fairwater facility that will enter production in 2026.5
  2. 115 acres (“to the west” of the first Fairwater). This is “a similar scale” as the first Fairwater, cost $4 billion, and enter production in 2027.5 Wall Street Journal reported that this site will also be a Fairwater.6
  3. 791 acres at Durand Ave

Microsoft has purchased 1,900 acres in the area.7

Power

Microsoft has connected this datacenter to a PPA they signed with National Grid Renewables for 250 MW of solar generation.59

Footnotes

  1. Microsoft announces $3.3 billion investment in Wisconsin to spur artificial intelligence innovation and economic growth - Stories ↩

  2. Now everyone claims Microsoft will build a data center on the Foxconn land in Wisconsin | The Verge ↩

  3. Wisconsin - Microsoft Local ↩

  4. Microsoft given greenlight for 15 more data center buildings in Mount Pleasant, Wisconsin - DCD ↩ ↩2 ↩3

  5. https://www.cnbc.com/2025/09/18/microsoft-wisconsin-data-center.html ↩ ↩2 ↩3 ↩4

  6. Inside Microsoft’s Plans for the ‘Most Advanced AI Data Center in the World’ ↩ ↩2

  7. Microsoft pauses construction on portions of Mount Pleasant project - WPR ↩ ↩2

  8. Microsoft data center will be the state’s largest electricity user. Power needs equal 300,000 homes ↩

  9. https://www.datacenterdynamics.com/en/news/microsoft-signs-solar-ppa-with-national-grid-renewables-in-wisconsin/ ↩

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