APECS Data Center Campus (Former GM Assembly Plant)
Viridian Acquisitions LLC · Janesville, WI · United States
Facility record
- Lifecycle
- ProposedSource-reported lifecycle
- Location precision
- approximate
- Address as listed
- Not published
- Coordinates
- 42.66331, -89.02056
- Serving utility, source-reported
- Not established
- Operational capacity, source-reported
- Not published
- Planned capacity, source-reported
- 800 MW
- Source record updated
- 2026-08-18
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
- Proposed
Janesville City Council voted 5-2 to approve a non-binding letter of intent, opening a 120-day negotiation window with Viridian.
Underlying source
Source notes
Redevelopment of the 250-acre former General Motors assembly plant (demolished 2019), a DNR-cleanup brownfield. Two configurations are under evaluation: an 11-building data center campus or an 8- or 9-building hyperscale campus, drawing up to 800 MW. Utility is Alliant Energy. The end user has not been disclosed. Coordinates are the geocoded former GM plant site, not a parcel-confirmed footprint.
Sources and provenance
- Janesville moves forward with data center plans for abandoned GM site · source retrieved 2026-08-18
- APECS Data Center Campus — project record · source retrieved 2026-08-18
- The Rock County data center fight: Janesville's three proposals · source retrieved 2026-08-18
Power Wars capture: 2026-11-02. Compute Atlas, CC BY 4.0. Entries are not independently verified by Power Wars unless stated.