Fire at $3.2B Lake Mariner AI data center exposes safety and corporate complexity
A fire in early June at the unfinished Lake Mariner data center in Somerset, New York, revealed significant gaps in emergency preparedness. Firefighters from the Barker Fire Department entered the building without working alarms, functional suppression systems, or accessible safety documentation, forcing them to navigate heavy chemical smoke "blind." The incident highlights the operational risks…
Key points
- Firefighters faced no alarms, suppression systems, or safety sheets during a June blaze at the Lake Mariner data center.
- The $3.2 billion facility involves TeraWulf, Fluidstack, Google, and Anthropic in a complex ownership and lease agreement.
- Local fire chief reports that critical hydrants remained non-functional weeks after the incident and subsequent safety review.
The $3.2 billion facility, built on a former coal mine site, involves a complex web of stakeholders. TeraWulf owns and operates the site on land leased from a company owned by its CEO. Fluidstack, a UK-based AI firm, will manage the center, while Google holds warrants for a 14% equity stake and guarantees Fluidstack’s lease. Anthropic is listed as a key customer for the compute resources. TeraWulf claims responsibility for safety and states it has implemented improvements like Knox boxes and additional hydrants following an after-action review.
However, local fire chief Steve Matisz reports that critical infrastructure issues remain unresolved. As of mid-August, he stated that the hydrants were still dry and no visible work had been done to fix them. The incident underscores the tension between aggressive AI buildout timelines and local safety regulations, raising questions about accountability in multi-layered corporate structures.
The complex corporate web behind a $3.2 billion AI data center
Ars Technica AI · 7 September 2026
In early June, a fire broke out in a still-unfinished building at the Lake Mariner data center in Somerset, New York, exposing just how little the local fire department knew about what it was walking into. Firefighters reportedly found no working alarm, no suppression system, and three dead hydrants; the safety documents they’re legally entitled to see reportedly burned up in the blaze.
Steve Matisz, chief of the Barker Fire Department, said his crew went into the building “kind of blind,” facing heavy black smoke from chemicals they couldn’t identify because the safety sheets meant to inform them had apparently burned up. “It’s been a difficult situation,” Matisz said. He wasn’t sure what to think about the claim that the safety sheets had burned in the fire.
The site is a former coal mine on Lake Ontario. The $3.2 billion campus is one of the largest AI data center buildouts in New York, and it has many stakeholders. A company called TeraWulf owns and operates the data center on land it leases from a company owned by its own CEO; Fluidstack, a UK-based AI company, will run the center; Google holds warrants for a future 14 percent equity stake and has agreed to guarantee Fluidstack’s lease payments; and Anthropic is among the AI companies whose compute demand the facility exists to serve.
TeraWulf eventually told me that it was responsible “for operational safety and emergency preparedness at the Lake Mariner Data Campus, including required safety systems and coordinating with local first responders.” Kerri Langlais, the company’s chief strategy officer, added that the company had implemented Knox boxes, additional hydrants, and safety data sheet “go-bags” following an after-action review with the county.
When I reached Matisz in mid-August, he said that a Knox box representative had visited the site and had a meeting scheduled to build out that program. On hydrants, he was more direct: “As far as I know, [they] are still dry… I haven’t seen work done on them.”
This text was published by Ars Technica AI and written by Petala Ironcloud. It is reproduced here with attribution so you can read it in full; the rights remain with the publisher. Read it at the source ↗
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