November 4 Findings: SpaceX-Linked 6 GW Campus in Cochise County, Arizona Targets Initial 1.5 GW by 2027
Aterio Research Team
Filings reviewed through November 4, 2026
Aterio datasets
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The records behind this article live in the US Data Center Database: Locations and Power Demand dataset.
A November 4 statement names SpaceX as the project’s community town-hall host. Phase 1 targets 1.5 GW by H2 2027 with a total investment of $50 billion for this phase alone.
We reviewed the county application and utility letters for Cochise Supercomputer Campus, a proposed nine-building development planned across four phases on approximately 747 acres in Arizona. Tombstone Resources is the applicant. The proposed scale is significant: 1.5 GW of initial electrical demand, rising to 6 GW at full build-out, alongside 24 GWh of battery storage. The application describes grid power as the primary supply, with natural-gas standby generation for critical services. Figures 1 and 2 below show the proposed five-building AEPCO layout and four-building Southline layout, respectively.
Figure 1. AEPCO parcels: conceptual layout for five computing buildings arranged in two groups, with adjacent cooling and battery areas, internal roads and support infrastructure. Source: Tombstone Resources, SU26-22 application, Appendix D, PDF p. 22.
Figure 2. Southline Transmission parcels: conceptual layout for four computing buildings, with adjacent cooling and battery areas, access roads and support infrastructure. Source: Tombstone Resources, SU26-22 application, Appendix D, PDF p. 23.
At the concept plans’ 700 MW per building, assumed PUEs of 1.10–1.20 imply approximately 583–636 MW of critical IT capacity per building, with a 609 MW base case.
| Scenario | Assumed PUE | Critical IT per building |
|---|---|---|
| High IT capacity | 1.10 | 636 MW |
| Base case | 1.15 | 609 MW |
| Low IT capacity | 1.20 | 583 MW |
During the November 4 CoolFMLive Q&A featuring Cochise County District 3 Supervisor Frank Antenori, a $50 billion investment figure was mentioned in connection with the proposed campus. The phase and spending scope were not specified. Meeting remarks also indicated that the project would pay a higher electricity rate and could support residential bill reductions of up to 20% across SSVEC’s service area. Revenue offsets, including tax revenues, were cited; the mechanism and any customer savings remain to be confirmed.
Power delivery remains conditional. SSVEC and AEPCO’s letters require further studies, infrastructure, executed agreements and approvals. AEPCO describes a future three-party electric service agreement to be submitted to the Arizona Corporation Commission. SSVEC confirms that no agreement has been finalized; docket E-01773A-26-0123 covers the broader cooperative service framework.
SSVEC’s project FAQ reports a preliminary spring 2027 construction start, with the first stage potentially online 3–6 months later and subsequent stages at similar intervals. The schedule remains subject to approvals, load studies and infrastructure completion; it is not a confirmed opening date for the full 1.5 GW first phase.
The next scheduled milestone is the December 9 county planning hearing. If approved and built as proposed, the campus would mark SpaceXAI’s first gigawatt-scale, grid-powered data center campus.
