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Data center project · Niagara County, New York

Lake Mariner Data Campus

Under construction · A former coal-plant site that TeraWulf has turned from bitcoin mining into AI data halls leased largely to Fluidstack, with Google backing the leases.

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Status
Under construction · as of Aug. 2026
Location
Former Somerset coal plant, Town of Somerset near Barker · Niagara County
Power
750 MW
TeraWulf: 102 MW IT operating (July 2026) and 336 MW IT under construction; DCD: 500 MW campus capacity, expandable to 750 MW. IT load and campus power are different measures.
Investment
Reported as a $3.2 billion expansion (Spectrum News)
Developer and team
TeraWulf
End user
Fluidstack (Google credit support); Core42
Utility
NYSEG transmission; NYPA power allocation
Evidence
Primary public records
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.

Updates, newest first

  1. Sept. 30, 2026 NYISO's queue lists two 250 MW AI data center load requests at the Kintigh 345 kV substation (Lake Mariner Data II and Wulf Compute Data Center II). (New York Independent System Operator (NYISO), Sept. 30, 2026)
  2. Aug. 4, 2026 Spectrum News reported TeraWulf's figures for the expansion: $3.2 billion and 200 new jobs. (Spectrum News, Aug. 4, 2026)
  3. July 20, 2026 Investigative Post reported the expansion pays no state or local sales tax and receives discounted NYPA power; Niagara County was examining the lost revenue. (Investigative Post, July 21, 2026)
  4. July 2026 TeraWulf delivered building CB-3, bringing revenue-generating IT capacity to 102 MW, with 336 MW more under construction in CB-4 and CB-5. (TeraWulf Inc., Aug. 2026)
  5. March 20, 2026 TeraWulf topped out building CB-4; DCD reported 500 MW of campus capacity, expandable to 750 MW, and 360 MW of planned Fluidstack leases backed by Google. (DatacenterDynamics, March 20, 2026)

Conflicts and open questions

  • Spectrum News puts the expansion at $3.2 billion; TeraWulf guides $8-10 million per critical IT MW.

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