Operational
Core42 Lake Mariner
Core42 · Barker, United States
Core42 Lake Mariner is a operational data center project in Barker, United States. This record brings together its location, estimated IT capacity, construction timeline, water-disclosure gaps and original sources.
Epoch AI · Checked 2026-09-15 · Owner confidence: confident
AI data center listed by Epoch AI.
Request water-use information →Estimated operating IT capacity
58 MW
Source observation: 2026-07-23
Site water use
Not yet verified
No site-level value published in this atlas
Local water stress
Not yet assessed
Regional context has not been added
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Project timeline
Source notes reproduced from Epoch AI. Future projections are excluded. Status may have changed since the latest observation.
Both buildings still operational according to satellite imagery.
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.
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.
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.
Land clearing begins for Building 1, also known as CB-1, the first large AI/HPC building on the site.
Location
7725 Lake Rd, Barker, NY 14012
View the surrounding area ↗Sources & further reading
- Epoch AI — dataset and methodology ↗
- Terawulf press release with details of Core42 lease for Buildings 1-2 ↗
- Terawulf press release with details and timeline for Buildings 1-5 ↗
- DCD article suggesting that Fluidstack will deploy Google TPUs at Lake Mariner ↗
- Announcement of Anthropic-Fluidstack partnership, including data center(s) in New York ↗
Dataset attribution: Epoch AI, CC BY.
Local context is still being researched
No independently reviewed permit summary or community report has been added here. This does not mean there are no permits, concerns or impacts.
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Frequently asked questions about Core42 Lake Mariner
Where is Core42 Lake Mariner?
Core42 Lake Mariner is listed at 7725 Lake Rd, Barker, NY 14012. The project is in Barker, United States.
How much power does Core42 Lake Mariner use?
The latest source-backed estimate in this atlas is 58 MW of operating IT capacity, observed for 2026-07-23. This is an estimate of computing capacity, not metered annual electricity consumption.
How much water does Core42 Lake Mariner use?
No verified site-level water withdrawal or consumption figure has been added to this atlas. A missing figure means the value is not verified here, not that the project uses no water.