Building 5 is operational. On February 26, Terawulf [stated](https://investors.terawulf.com/news-events/press-releases/detail/132/terawulf-reports-fourth-quarter-and-full-year-2025-results) that CB5 was expected to be energized by Q4 2026. However, based on the pace of Building 4, 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. This building is [leased](https://investors.terawulf.com/news-events/press-releases/detail/112/terawulf-signs-200-mw-10-year-ai-hosting-agreements-with) to Fluidstack, likely contains [Google TPUs](https://www.datacenterdynamics.com/en/news/google-offers-its-tpus-to-ai-cloud-providers-report/), and is likely used by [Anthropic](https://www.anthropic.com/news/anthropic-invests-50-billion-in-american-ai-infrastructure).
Power (MW)
509.0
IT Power (MW)
436.0
H100-equiv
469,429
Cap-Ex ($B)
$16.70
Buildings Operational
5.0
Water (MGD)
0.00
Notes
Built on the shores of Lake Ontario at a former coal plant, the Terawulf-owned Lake Mariner campus serves a mix of crypto-mining and AI computing applications. We only track the AI buildings here. Buildings 1-2 (70 MW) are leased to G42 subsidiary Core42, while Buildings 3-5 (440 MW) are leased to Fluidstack. Our sources point to Fluidstack's buildings serving Google TPUs for Anthropic. We named this site after Fluidstack because it has leased the vast majority of the AI capacity.
- [Terawulf press release with details of Core42 lease for Buildings 1-2](https://investors.terawulf.com/news-events/press-releases/detail/99/terawulf-to-deliver-over-70-mw-of-data-center)
- [Terawulf press release with details and timeline for Buildings 1-5](https://investors.terawulf.com/news-events/press-releases/detail/132/terawulf-reports-fourth-quarter-and-full-year-2025-results)
- [DCD article suggesting that Fluidstack will deploy Google TPUs at Lake Mariner](https://www.datacenterdynamics.com/en/news/google-offers-its-tpus-to-ai-cloud-providers-report/)
- [Announcement of Anthropic-Fluidstack partnership, including data center(s) in New York](https://www.anthropic.com/news/anthropic-invests-50-billion-in-american-ai-infrastructure)