Cochise County posts 6 GW data-center application for December 9 hearing
Tombstone Resources’ pending special-use request covers nine computing buildings and battery storage on 747 acres near Cochise, Arizona.
At a glance
- Application
- SU26-22 191 Data Center and BESS
- Applicant proposal
- Up to nine computing buildings in four phases
- Applicant power estimate
- Up to 6 GW at full build-out
Cochise County has posted a pending special-use application for a proposed artificial-intelligence data-center campus and battery energy storage system on approximately 747 acres east of U.S. Highway 191 near Cochise, Arizona.
Tombstone Resources L.L.C. submitted docket SU26-22. Applicant materials describe as many as nine computing buildings delivered in four phases, with estimated electrical demand of up to 6 gigawatts at full build-out, plus battery storage, electrical, cooling and support infrastructure. The land is currently zoned RU-4 Rural.
The county emphasizes that these figures come from the applicant and have not been independently verified or endorsed. No approval has been issued. A November 4 applicant-hosted meeting has passed, while the formal Planning and Zoning Commission hearing is scheduled for December 9.
The county’s updated project page moves the hearing start from the previously announced 4 p.m. to 2 p.m. local time. Written comments received by noon November 27 are expected to be included in the commission packet; later comments can still enter the public record.
The application is a regulatory-stage proposal, not a confirmed investment, construction award or open procurement. The next material milestone is the December 9 commission hearing, when the commission may approve, condition or deny the request.
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Read story →What happens next
The Cochise County Planning and Zoning Commission hearing is scheduled for December 9, 2026 at 2 p.m. local time; packet comments are due by noon November 27.
Source for this milestone →Why it matters for the industry
The filing signals a potentially large AI-power and construction program, but the county says the application remains pending and applicant figures are not independently verified. It is not an open procurement or confirmed investment.
Supporting source →Sources & reporting
- Cochise County data-center application page · Updated 2026-11-06
- Cochise County application announcement · 2026-11-02
Sources checked 2026-11-08.