Microsoft · Mount Pleasant, Wisconsin

Microsoft Fairwater Wisconsin

442MW

The power of 360,000 US homes.

Drawing power since Apr 2026. Projected to reach 2.7 GW by May 2028.

Capital cost
$14.0B
Chips
B200
Users
OpenAI, Microsoft
Project
Microsoft AI WAN
Energy
WE Energies
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Power over time

facility power · 7 milestones
Every milestone
  1. 14 Jul 2023 — Land clearing begins for Building 1.
  2. 26 Sep 2025 — Building 1 cooling and backup generators all look complete from above but there is still construction visible around the building. Building 2 is well underway with a foundation and a complete substation. Large carpark and concrete area north of Building 2. Building 3 has a concrete foundation and a substation underway.
  3. 28 Jan 2026 — Building 1 looks complete, but based on Microsoft announcements, it's not fully operational yet. Steel framing is underway for Building 2.
  4. 16 Apr 2026 442 MW Building 1 is operational. X post from Microsoft saying this date for Fairwater becoming operational.
  5. 15 May 2026 442 MW The main shell of Building 2 looks almost completed. In Area 2 (northwest of Buildings 1-2), the grading for the original design has been replaced with grading for the new 9-building design, making way for Buildings 3-11. Work continues on the northern substation in Area 2.
  6. 20 Feb 2027 · projected 885 MW Building 2 is operational. This is estimated based on (1) the delay between Building 1 and Building 2 starting land clearing, (2) in March 2025, a Microsoft spokesperson said “fully on track” with the first phase , where “southern datacenter buildings complete, and preparation begins for operations” was expected by late 2026. Finally, while it's not 100% consistent with our estimates, MISO was planning 1480 MW of load for Microsoft in Mount Pleasant in 2026.
  7. 13 May 2028 · projected 2.7 GW Buildings 3-11 are estimated to be operational. The grading for this revised 9-building plan was underway in May 2026, and we assume an average 2-year build time from that point.

Every step Epoch planned here on 2 Sep 2026 is still on plan. Planned against reached

Gas made 37% of the power on this site's grid

net generation by fuel · Oct 2025 to Sep 2026

Midcontinent Independent Transmission System Operator, Inc. MISO · balancing authority

  1. Gas 37%
  2. Coal 26%
  3. Nuclear 14%
  4. Wind 15%
  5. Solar 6%
  6. Hydro 1%
  7. Other 1%

The grid of the utilities that serve Racine County, WI. Each grid is a balancing authority. Generation only; imports are excluded. Every grid behind an AI site.

Owners plan 12 MW of new power in Racine County, all solar

power plants in Racine County · EIA-860M, September 2026
  1. Root River Solar WI, LLC Solar · 6 MW · Dec 2026 · proposed · OneEnergy, Inc.
  2. Tichigan Solar WI, LLC Solar · 6 MW · Dec 2026 · proposed · OneEnergy, Inc.

In service in Racine County today: 340 MW. Since January 2023: 328 MW added, 0 MW retired. A plant in the same county does not mean it feeds the site. Power plants near every AI site.

Sources

selected by Epoch AI
  1. Microsoft blog with engineering details
  2. Microsoft blog with more general information
  3. Construction Permit Application for building 1
  4. Plan for 9-building and 6-building expansions
  5. OpenAI article mentioning they use Microsoft's Fairwater supercomputers

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Mount Pleasant. Grid: U.S. Energy Information Administration, Hourly Electric Grid Monitor (Form EIA-930), public domain, retrieved 16 Oct 2026; utilities by county from Form EIA-861 and the U.S. Census Bureau Geocoder, public domain. Power plants: U.S. Energy Information Administration, Form EIA-860M, public domain, inventory as of September 2026. All sources.