SpaceXAI Seeks Zoning for 6GW Arizona Data Center Campus

SpaceXAI has asked Cochise County, Arizona, for a special development permit to build a data center complex it says could draw 6GW of power at full build-out — a figure that, if realized, would make it by far the largest data center in the world.

The application, filed through affiliate Tombstone Resources LLC, covers two plots totaling 747 acres near the Willcox Playa, a dry lake roughly 80 miles east of Tucson. The land is currently owned by power companies Arizona Electric Power Cooperative (AEPCO) and Southline Transmission LLC. Company representatives presented the plans to residents at a public meeting this week.

The campus would eventually hold up to nine data center buildings, each measuring 493,000 sq ft (45,801 sqm), and come online in four 1.5GW stages. Construction would start in March 2027, provided the county grants zoning approval.

What does this change for Arizona's grid?

Power, not land, is the binding constraint. Availability of compute depends on grid upgrades, which SpaceXAI said it will fund itself. The company plans to spend about $3.6 billion on power infrastructure, including $500 million of work needed before phase one construction can begin.

The site sits next to AEPCO's Apache Generating Station, a 626MW plant running on coal, natural gas and solar. To smooth demand and prevent the facility from straining Arizona's grid, SpaceXAI intends to install a 24GWh battery energy storage system.

Scale gives some cause for confidence on paper. Arizona's grid had net capacity of 32GW in 2024, according to Energy Information Administration statistics. Chips are the harder problem. Procuring enough AI accelerators to fill and run such a facility — plus all the power and cooling equipment to serve them — will likely be a bigger challenge than securing electricity.

The county will decide the zoning request at a meeting on December 9.

Can the company deliver it?

Elon Musk's firm, now styled SpaceXSI, already operates a cluster of data centers around Memphis — one in Tennessee, the rest across the state line in Mississippi — running its Grok chatbot and providing AI cloud services to clients including Anthropic and Google. This week Musk announced two more Mississippi facilities, named Gun Range and Spam.

Musk claims more than 1GW of capacity in the Memphis cluster. Those claims have been disputed, and the Arizona application's 6GW target sits far beyond anything the company has demonstrated to date. The gap between application documents and operational reality is where this proposal will be judged.

A political shadow over the chip supply plan

Musk's ability to supply his own silicon faces a separate political test. He hopes to build a $20 billion chip factory in Texas, dubbed the TeraFab, to make chips for his companies, but the Lone Star State may turn more hostile after Democratic gubernatorial nominee Gina Tinojosa — in the source named Gina Hinojosa — swept to victory in Tuesday's midterm elections.

Speaking to CNN on Thursday, Hinojosa set her terms: "We can have a strong working relationship with Elon Musk and his companies, but it has to be on our terms. It cannot be just running over the people of Texas, and that's what changes now that I will be governor."

For the Arizona project, the immediate milestone is procedural rather than political. If Cochise County approves the permit on December 9, SpaceXAI's $500 million first-phase grid work becomes the leading indicator of whether the March 2027 construction start holds.