Data center campus
Microsoft Fairwater Data Center (Mount Pleasant)
Microsoft Fairwater Data Center is an announced AI data center campus. 0.45 GW of capacity has been announced; 0.37 GW is energized. The gap is what this page tracks: what is claimed versus what is actually built, each figure dated and sourced.
Partially energized · Former industrial site · MISO · Mount Pleasant, Wisconsin, United States
Capacity: announced vs energized
Announced-to-energized gap: 0.08 GW. Every figure below is a single dated, sourced claim. Current best per series resolves by evidence tier, then date. See the methodology.
| Source | ||||
|---|---|---|---|---|
| Announced | 0.45 GW | 2025-01-01 | reported | utility filing |
| Energized | 0.37 GW | 2026-04-16 | reported | journalist report |
| Under construction | 2.26 GW | 2028-05-13 | claimed | journalist report |
The deal
- developer
- Microsoft · Owner-operator; Fairwater flagship AI datacenter on former Foxconn land.
- tenant
- Microsoft / OpenAI · Self-tenant AI supercompute (Azure).
- chip supplier
- NVIDIA · GB200/B200-class GPUs (Epoch cites B200).
- utility
- We Energies · Regulated monopoly; sole grid power supplier, building new gas generation.
- grid operator
- MISO · We Energies operates within MISO.
Power
- Power source
- grid
- Grid operator
- MISO
- Interconnection
We Energies Oak Creek gas plant (5 simple-cycle turbines), 1.10 GW gas, Permitted. 1,100 MW proposed at the Oak Creek coal site; first turbine delivery May 2026, operations winter 2027-summer 2028.
We Energies Paris gas plant (Kenosha County), 0.13 GW gas, Permitted. 128 MW gas plant near Paris, WI; part of ~$2.77B of PSC-approved generation/transmission justified on Microsoft load.
Financial structure
- Microsoft Mount Pleasant campus investment (announced)
- $3.3B. Initial announced investment; Epoch estimates ~$14B deployed to date and ~$85B at full buildout. press release
Sources
- Microsoft completes construction on first datacenter facility in Mount Pleasant, Wisconsin · Microsoft Source
- Microsoft Fairwater Wisconsin | AI Data Centers · Epoch AI
- Wisconsin gas plant proposals test state review process · Utility Dive
824d3b90-2903-4335-9716-8f73fb969f7a · Tracked with DEPLOY's verified-vs-claimed methodology. Announced numbers are claims, not built capacity.