SpaceX won't remove xAI's 69 unpermitted gas turbines until 2027 while planning $2.8 billion more, and the old fleet hints at a secret second project

SpaceX's turbine specs point to a project it hasn't announced

SpaceX told regulators this week it needs until July 2027 to remove 69 unpermitted gas turbines powering xAI's Colossus data centers south of Memphis 1. That is the headline every outlet will run. The buried story is in the hardware specifications.

The permanent replacement is a 1.2 gigawatt natural gas plant SpaceX is permitting in Mississippi, consisting of 41 turbines ranging from 16.48 to 50 megawatts, according to state permit documents 1. Those specifications appear to be different from the 69 turbines currently operating at the site, though TechCrunch notes it could not verify the specific models of the existing units 1. Separately, earlier this year Elon Musk bought APR Energy, a company that specializes in temporary natural gas power 1. Based on an archived version of APR Energy's website before it was taken down, the turbines in the company's fleet also appear to differ from the models cited in permits for the new permanent plant 1.

If the APR Energy fleet is not destined for the Colossus permanent plant, where does it go? TechCrunch reports those turbines are likely intended for another, unannounced project 1. The spending supports that inference. SpaceX's IPO filing disclosed plans to purchase $2.8 billion worth of gas turbines over three years 1. That is not the budget of a company building a single facility.

The federal government has added its own weight to the dispute. In June, the Department of Justice intervened in a lawsuit filed by the NAACP and the Southern Environmental Law Center over the unpermitted turbines, siding with SpaceX and saying the turbines were a matter of "national, economic, and energy security" 1. When the DOJ invokes national security to shield unpermitted gas turbines from an environmental lawsuit, it signals that the infrastructure serves a purpose the government considers strategically significant.

The environmental cost of that strategic significance falls on a region TechCrunch describes as among the most polluted in the United States 1. The 69 turbines have the potential to emit more than 2,000 tons of smog-forming nitrogen oxides (NOx) per year 1. SpaceX claims the turbines are exempt from permitting because they remain on the trailers used to ship them, but federal regulations state that turbines of this size and usage require permits regardless of what they sit on 1.

The sequence is worth tracing. SpaceX acquired xAI in February 1. Within months, Elon Musk bought a temporary power specialist, the DOJ stepped in to protect the unpermitted infrastructure from an environmental lawsuit, SpaceX disclosed plans to buy $2.8 billion in additional turbines in its IPO filing, and the company asked regulators for until mid-2027 to clean up the existing fleet 1. Each step alone reads as standard data center expansion. Together they describe a company stockpiling power generation capacity at a scale the public record does not fully account for.

For anyone tracking the AI compute arms race, the takeaway is concrete. The competition for frontier AI has moved past chips and into power plants. The companies building the largest training clusters are acquiring turbine fleets, buying temporary power companies, and securing federal protection to keep infrastructure running that environmental regulators consider illegal. The clearest evidence of what xAI is actually building is not in any product launch or press release. It is in permit filings, IPO disclosures, and turbine specification sheets, sitting in public documents that almost no one reads.