Microsoft Cheyenne Mega-Campus Expansion

Facility record

Lifecycle

PermittedSource-reported lifecycle

Location precision

approximate

Address as listed

Not published

Coordinates

41.09, -104.79

Serving utility, source-reported

Black Hills Energy

Operational capacity, source-reported

Not published

Planned capacity, source-reported

Not published

Source record updated

2026-10-22

Source-reported capacity; not metered consumption. Review underlying documents and notes. Planned capacity may include future phases and is not added to operational capacity here. The source may use facility, grid-feed or IT capacity definitions; consult the linked documents.

Coordinate precision is a source label, not an independent parcel survey. A marker does not confirm utility territory or establish an effect on residential bills.

Reported lifecycle history

1. 2026-04Proposed

   Microsoft announced intent to purchase 3,200 acres: 200 acres at Bison Business Park on Wapiti Trail + 3,000 acres in Southeast Cheyenne, tripling Wyoming footprint

   Underlying source
2. 2026-07-22Permitted

   Microsoft closed on its ~3,460-acre land purchase (June 26, 2026) and the Cheyenne City Council approved annexation and zoning for the expansion parcel on a 6-3 vote (July 13-14, 2026), clearing the land-use path for the campus; construction has not been reported as begun on this parcel yet. Note: a local referendum petition against the annexation was launched July 20, 2026, so this approval could still be contested.

   Underlying source

Source notes

Described by Microsoft as a 'multi-gigawatt multi-decade ecosystem.' The 400 MW initial-target figure that appeared in the prior record was not found in either cited source and has been removed pending a citable source (neither the Microsoft newsroom announcement nor Cowboy State Daily mentions a specific MW figure). Separate from existing Cheyenne campus (since 2012) and the HR Ranch Road construction underway 2025-2026. Coordinates approximate for Bison Business Park / SE Cheyenne area.

Large Power Contract Service (LPCS) tariff; Microsoft funds all grid infrastructure upgrades without raising residential rates. Hydrogen fuel cell pilot (Caterpillar) tested 48-hour backup power. Commitment to carbon-free energy matching fossil fuel consumption.

Sources and provenance

• Microsoft Announces Intent to Expand Datacenter Operations in Cheyenne · source retrieved 2026-09-21
• Microsoft to Triple Its Cheyenne Data Center Footprint With 3,200-Acre Land Buy · source retrieved 2026-10-17
• Cheyenne City Council approves Microsoft's 3,460-acre annexation after hours of public debate · source retrieved 2026-07-22
• Cheyenne is 3,500 acres larger after approving controversial Microsoft annexation · source retrieved 2026-07-22
• Wyoming Business Council program & service catalog, materials prepared for the Joint Minerals Committee (June 2026) — Data Center Sales Tax Exemption recipients · source retrieved 2026-08-19

Power Wars capture: 2026-11-02. Compute Atlas, CC BY 4.0. Entries are not independently verified by Power Wars unless stated.