SpaceX SI Faces Up to $6.1 Million in Mississippi Stormwater Penalties. The State Says Work Started Before the Permits, and SpaceX Is Negotiating.

Honest fence (read first): This post is about construction permits and a contractor dispute that SpaceX disclosed in its own quarterly filing. It isn't about the gas turbines. That's the separate NAACP Clean Air Act case we covered on Oct 21. No penalty has been set, and SpaceX says it's negotiating.

Editorial Thesis

On the Oct 20 earnings call, Elon Musk said SpaceX is "tracking to be able to bring roughly 200,000 GB300s online per month for every month for the remainder of this year and continuing that pace next year." He said he spends "often four days a week, night and day" in Memphis getting Colossus 2 running.

Two days later, on Thursday, Oct 22, SpaceX filed its Q3 10-Q with the SEC, and it shows part of what building at that speed costs. In August 2026, the Mississippi Department of Environmental Quality (MDEQ) "issued notices of violation to MZX Tech LLC alleging that land-disturbing construction activities at sites occurred prior to coverage under Mississippi's Large Construction Stormwater General Permit."

MDEQ "is seeking civil penalties of up to $25,000 per day, with preliminary claimed exposure of approximately $6.1 million across three sites." SpaceX says it "is cooperating with MDEQ and is in discussions to resolve the matters through a single agreed order."

For a company that spent $19.6 billion on capex last quarter, $6.1 million is small. The point is the order of events: the state says the digging and building started before the stormwater permit coverage was in place. SpaceX's filing reports the allegation; it doesn't admit it.

Honest Verdict

Proven (SpaceX's own 10-Q): MDEQ notices of violation to MZX Tech (a SpaceX SI subsidiary) in August 2026; alleged construction before stormwater permit coverage at three sites; up to $25,000 a day; about $6.1 million in preliminary claimed exposure; talks toward one agreed order. Proven (MDEQ letter, Aug 10): at "Project Tulane" in Southaven, MZX staff told MDEQ that "work had commenced without permit coverage," and a Jul 16 inspection found land disturbance that "included both a cooling tower structure as well as security fencing." Not proven: the final penalty. "Preliminary claimed exposure" is the state's opening number, not a fine. No order has been signed.

What the paperwork shows

MZX Tech filed a Notice of Intent for stormwater coverage on Mar 20, 2026, for about 13.87 acres at the Project Tulane site, according to MDEQ's Aug 10 letter. That's the step that's supposed to come before land is disturbed.

At a Jul 15 meeting in Jackson, MDEQ wrote, "it became apparent, from MZX staff, work had commenced without permit coverage." Inspectors visited the next day. The letter cites Mississippi's water-pollution law and warns of "the maximum statutory penalty of $25,000 per violation per day that construction activities occur without permit coverage."

MZX's Aug 19 replies, signed by a SpaceX environmental, health and safety director, say:

• For Project Tulane (2400 Stateline Road West), the stormwater application "remains on file" and is "Pending MDEQ approval." Inlet protection at storm drains was installed Aug 18.
• For a "West Parcel" (the former Southaven municipal training center), MZX already holds coverage for its existing campus, but the change to add the new parcel "remains pending." MZX listed water trucks "every 1.5 hours" and covered stockpiles to control dust and sediment.

We read two of the notices. The 10-Q says three sites are involved. We haven't seen the third notice.

Why stormwater permits matter

Stormwater permits sound like a paperwork detail, but they're the rule that keeps mud and runoff from a big construction site out of drains and streams. Mississippi's general permit requires coverage before land disturbance on large sites, with an erosion-control plan in place. Starting work before that coverage is what the state is citing.

The bigger construction fight in the same filing

The 10-Q's legal note also describes a much larger dispute. In August 2026, SpaceX SI and two affiliates sued Darana Hybrid, the International Hot Rod Association and Darryl Cuttell in federal court in Tennessee. They allege breach of a contract "for construction of the plaintiffs' super intelligence computing facilities in the Memphis area," plus fraud and other claims. SpaceX estimates its damages at "more than $500 million."

The defendants "dispute the claims, have moved to dismiss, and have asserted counterclaims and recorded construction liens seeking approximately $569 million for alleged unpaid work." Local outlets reported the dueling lawsuits in August. The 10-Q is the first time SpaceX has put the numbers in an SEC filing.

The 10-Q also says SpaceX has accrued $350 million for probable litigation losses company-wide as of Sep 30. That's a total for all matters, not a figure for this case, and we don't attribute it to Darana.

What this says about the 200,000-GPUs-a-month pace

The 10-Q puts SpaceX's installed AI compute at 1.7 gigawatts on Sep 30, up from 0.6 GW a year earlier. Getting there took gas turbines, Tesla Megapacks (SpaceX bought $480 million of them in nine months, per the 10-Q), new buildings and a lot of contractors working at once.

The filings don't show that speed is illegal or that the sites are unsafe. They show three things a fast build can leave behind: a state permit case, a contractor claiming hundreds of millions in unpaid work, and the separate turbine lawsuit still in federal court. None of these has a final ruling.

What we still can't verify

• The third MDEQ site and whether it's one of the data-center buildings DCD names (Macrohard, Macroharder, Minihard). DCD's names aren't in the 10-Q.
• Whether MDEQ has since issued the pending stormwater coverage.
• The final penalty, if any, and the terms of the agreed order.
• Who's right in the Darana case. Both sides' claims are allegations.

The video

We embed The Wall Street Journal's Oct 24 clip, "What I Saw Outside Elon Musk's Massive Colossus 2 Data Center" (3 minutes), in which Christopher Mims visits the site and talks with a local activist. We couldn't play it on our research machine, so the facts here come from the 10-Q, MDEQ's letter and MZX's replies. Tomorrow Engineered's longer explainer on Colossus power and cooling is an alternate.

Bottom line

SpaceX's own filing confirms that Mississippi regulators say work at three SpaceX SI sites started before stormwater permit coverage, with up to $6.1 million at stake and a settlement under discussion. It also lists a $569 million lien fight with a former contractor. Musk's 200,000-GPUs-a-month pace is a target. These filings are part of what it costs to build that fast.