TeraWulf Lake Mariner (Fluidstack)
AI data center in Barker, New York, operated by Fluidstack.
TeraWulf's former bitcoin-mining campus on Lake Ontario, converted to AI halls leased to Fluidstack with a Google backstop. Anthropic named New York as a Fluidstack site in its $50B US build-out.
Power: what each source says
TeraWulf (2026-02-26): CB3 energized mid-May 2026, CB4 by Q3 2026, CB5 by Q4 2026. Epoch AI estimates 210 MW IT as of 2026-10-31 and ~378 MW IT / 441 MW facility after CB5 (~2027-03, estimate).
Figures labelled Epoch AI are estimates from satellite imagery, permits and filings. Company figures come from the operator, owner or its filings. IT power is what the servers draw; in Epoch AI’s figures for these campuses it runs about 15–35% below total facility power.
Tenants
Part reported Fluidstack; Anthropic (likely); Core42 in a separate hall
“Reported” means a press outlet or Epoch AI named the tenant and neither the operator nor the tenant has confirmed it. The outlet is named in brackets and listed under sources.
Campus facts
- Operator
- Fluidstack 1
- Owner / developer
- TeraWulf (with Google and Blackstone as investors per Epoch AI) 1
- City
- Barker 1
- State / region
- New York 1
- Country
- United States 1
- First power
- 2026-05 1
- Chips
- Google TPU v7 (Epoch AI estimate) 1
- GPUs / accelerators
- Not published
- Cooling
- Not published
- Power source
- grid 1
- Coordinates
- 43.33° N, 78.55° W (town level)
- Verified
Sources
- TeraWulf Q4 and FY2025 results (2026-02-26) accessed 2026-11-09
- Anthropic: $50 billion in American AI infrastructure accessed 2026-11-09
- Epoch AI, AI data centers dataset (CC-BY 4.0, updated 2026-11-06) (licence: CC BY 4.0) accessed 2026-11-09