Inside the $3.2 Billion Lake Mariner AI Data Center’s Accountability Maze
New York's $3.2 billion Lake Mariner AI campus links TeraWulf, Fluidstack, Google and Anthropic amid fire, energy, jobs, safety and oversight concerns.
Summary
An early June fire at unfinished Lake Mariner in Somerset, New York, injured nobody but revealed no working alarm or suppression system, three dry hydrants and burned safety sheets, sending Barker Fire Department chief Steve Matisz’s crew into unidentified chemical smoke. Operator TeraWulf, leasing the former coal site from CEO Paul Prager’s Somerset Operating Company, promised Knox boxes, hydrants and safety sheet go bags, but Matisz said in mid August that hydrants remained dry.
The $3.2 billion, 500 megawatt campus will serve Anthropic through UK operator Fluidstack; Google guarantees Fluidstack’s lease and holds warrants for 14 percent of TeraWulf. A 2024 projection offered 35 to 40 permanent jobs, versus 165 jobs and $85 million investment pledged for a 2019 New York Power Authority discount, reviewed annually. Anthropic’s February 2026 covenant covers Lake Mariner rate increases, all grid infrastructure and matching generation, but not noise or clean energy verification. TeraWulf shifted from 95 percent zero carbon in 2024 to 91 percent low carbon in 2025. Zone A was 87 percent zero emission in 2025, including 42 percent nuclear and 34 percent hydro, but no source contract or renewable certificates verify Lake Mariner’s share. About 90 megawatts, 18 percent of interconnection, gets NYPA’s market sourced High Load Factor discount.
Anthropic’s direct 20 year, $19 billion Kentucky lease announced July 6 contrasts with Lake Mariner. FERC accepted TeraWulf’s position that unexercised Google warrants needed no disclosure in its Maryland plant purchase despite opposition from Public Citizen, NAACP, Port Tobacco River Conservancy and Independent Market Monitor. New York’s broader data center bill passed in early June but remained unsigned three months later. Governor Kathy Hochul’s July moratorium above 50 megawatts excludes already permitted Lake Mariner; two months after the fire, water failures persisted.
Positives
- Nobody was injured in the early June fire, and construction at Lake Mariner continued.
- Anthropic’s February 2026 commitment covers consumer rate increases, 100 percent of grid infrastructure costs and new generation matching its data center demand.
- Zone A generated 87 percent zero emission electricity in 2025, including 42 percent nuclear and 34 percent hydroelectric power.
- TeraWulf promised Knox boxes, additional hydrants and portable safety data sheets after reviewing the fire response with county officials.
- New York’s Responsible Data Center Development Act would mandate environmental review, efficiency rules, prevailing wages, community investment and renewable energy by 2040.
Risks & concerns
- Three hydrants remained dry in mid August after firefighters encountered no working alarm, suppression system or usable safety sheets during the early June blaze.
- Lake Mariner projects only 35 to 40 permanent jobs, versus 165 jobs and $85 million in investment pledged in 2019.
- TeraWulf’s energy claim fell from 95 percent zero carbon in 2024 to 91 percent low carbon in 2025 without source contracts or certificates.
- Somerset residents report constant data center noise, while Anthropic’s ratepayer covenant does not cover noise or verify clean energy claims.
- Google’s potential 14 percent stake, Fluidstack’s lease and Anthropic’s demand divide financial, operational and reputational responsibility among several companies.
- Governor Kathy Hochul’s permit moratorium excludes the already approved 500 megawatt campus, while the legislature’s broader bill remains unsigned.