Anthropic Lake Mariner
Running (some may still be expanding)
Anthropic Lake Mariner is an AI data center in Barker, New York, developed or operated by AI XPV Platform for Anthropic. Satellite imagery shows its computers drawing about 210 MW today, against 378 MW planned.
U.S. average: 18.2¢ (+3.4%).
Statewide context, not this project’s effect: prices move for many reasons. Source: U.S. Energy Information Administration.
Satellite figures are Epoch AI estimates from imagery of buildings, cooling and power equipment; about 80% fall within a factor of 1.4 of the true value.
- Mar 31, 2027ScheduledSatellite analysis by Epoch AI · 378 MW planned
Building 3 (AKA CB5) is operational. On February 26, 2026, Terawulf stated that CB5 was expected to be energized by Q4 2026. However, based on the pace of Building 2, and comparisons to other projects like Stargate Abilene, we think this is optimistic. We expect a 3-month delay past the end of Q4 2026 to get to full operational capacity.
- Oct 31, 2026Satellite analysis by Epoch AI · 210 MW in use
Building 2 (AKA CB4) is operational. On February 26, Terawulf stated that CB4 was expected to be energized by Q3 2026.
- Jul 23, 2026Satellite analysis by Epoch AI · 42 MW in use
Building 1 looks complete, consistent with it going operational back in May. Building 2 is mostly complete, with the row of backup generators on the east side of the building still being installed. Building 3 shell is complete, with rooftop coolers midway through installation, and no neighboring generators installed/visible yet.
- May 31, 2026Satellite analysis by Epoch AI · 42 MW in use
Building 1 is operational. On February 26, Terawulf stated that CB3 was expected to be energized by mid-May 2026. A drone video commissioned from RAAD shows several cooling units operating on May 8. It's therefore likely that the building was fully operational around this date.
- Mar 2, 2026Satellite analysis by Epoch AI · 0 MW in use
Building 1 appears to have a complete shell and cooling equipment. Building 2 shell is still under construction, but 17 cooling units are already loaded on the roof. The outline of Building 3 is visible at the foundation.
- Jun 11, 2025Satellite analysis by Epoch AI · 0 MW in use
Land clearing begins for Building 1 (AKA CB3).
No hearings, court cases, approvals or disputes are on record for this project yet.
| Chip | Designer | Units | As of | Count is |
|---|---|---|---|---|
| TPU v7 | 125,598 | Oct 31, 2026 | Estimate |
Source: Epoch AI, AI data centers, CC BY 4.0
Satellite and capacity estimates via Epoch AI (CC BY 4.0)
- Terawulf press release with details and timeline for Buildings 1-5 investors.terawulf.com
- DCD article suggesting that Fluidstack will deploy Google TPUs at Lake Mariner datacenterdynamics.com
- Announcement of Anthropic-Fluidstack partnership, including data center(s) in New York anthropic.com
- Epoch AI calculation sheet for this site
Satellite estimates: Epoch AI, CC BY 4.0, reformatted for this page.