Core42 · Barker, New York

Core42 Lake Mariner

58MW

The power of 47,000 US homes.

Drawing power since Oct 2025.

Capital cost
$2.2B
Chips
B200
Users
G42
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Power over time

facility power · 5 milestones
Every milestone
  1. 1 Oct 2024 — Land clearing begins for Building 1, also known as CB-1, the first large AI/HPC building on the site.
  2. 1 Oct 2025 19 MW Building 1 is operational. Based on Terawulf saying "As of September 30, 2025, the site has energized 245 MW of Bitcoin-mining capacity and 22.5 MW of HPC capacity." The small "Wulf Den" building was said to be 2 MW of IT power while CB-1 would be 16 MW. This is roughly consistent with 22.5 MW of total facility power. This building is leased to Core42, a subsidiary of UAE-based G42. It likely uses NVIDIA DGX B200 servers.
  3. 2 Mar 2026 19 MW Buildings 1 and 2 both appear to have complete building and cooling equipment, based on satellite imagery. Not considering Building 2 operational yet, due to Terawulf's statement that CB2B is expected in March 2026, and is likely still in commissioning phase.
  4. 31 Mar 2026 58 MW Building 2 is operational. On February 26, Terawulf stated that CB2A is operational, presumably making up half the final capacity. CB2B was expected in March 2026. However, it's notable that a drone video commissioned from RAAD showed no cooling fan movement on May 8th, suggesting it was not in use. This building is leased to Core42, a subsidiary of UAE-based G42. It likely uses NVIDIA DGX B200 servers.
  5. 23 Jul 2026 58 MW Both buildings still operational according to satellite imagery.

Gas made 54% of the power on this site's grid

net generation by fuel · Oct 2025 to Sep 2026

New York Independent System Operator NYIS · balancing authority

  1. Gas 54%
  2. Coal 0%
  3. Nuclear 19%
  4. Wind 5%
  5. Solar 0%
  6. Hydro 18%
  7. Other 3%

The grid of the utilities that serve Niagara County, NY. Each grid is a balancing authority. Generation only; imports are excluded. Every grid behind an AI site.

Owners plan 333 MW of new power in Niagara County, all solar

power plants in Niagara County · EIA-860M, September 2026
  1. Oxbow Hill Solar · 140 MW · May 2029 · proposed · Cypress Creek Renewables
  2. Somerset Solar LLC Solar · 100 MW · Oct 2029 · proposed · AES Clean Energy
  3. Bear Ridge Solar · 93 MW · May 2028 · proposed · Cypress Creek Renewables

In service in Niagara County today: 3.1 GW. Since January 2023: 42 MW added, 0 MW retired. A plant in the same county does not mean it feeds the site. Power plants near every AI site.

Sources

selected by Epoch AI
  1. Terawulf press release with details of Core42 lease for Buildings 1-2
  2. Terawulf press release with details and timeline for Buildings 1-5
  3. DCD article suggesting that Fluidstack will deploy Google TPUs at Lake Mariner
  4. Announcement of Anthropic-Fluidstack partnership, including data center(s) in New York

Data: Epoch AI, “AI data centers”, CC BY 4.0, retrieved 22 Oct 2026. Facility power adds cooling and other overhead to the IT power the servers draw. Placed at the centre of Barker. Grid: U.S. Energy Information Administration, Hourly Electric Grid Monitor (Form EIA-930), public domain, retrieved 16 Oct 2026; utilities by county from Form EIA-861 and the U.S. Census Bureau Geocoder, public domain. Power plants: U.S. Energy Information Administration, Form EIA-860M, public domain, inventory as of September 2026. All sources.