Anthropic Lake Mariner

Land clearing begins for Building 1 (AKA CB3).

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.

Building 1 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 CB3 was expected to be energized by mid-May 2026. A drone video commissioned from [RAAD](https://raad.com/) shows several cooling units operating on May 8. It's therefore likely that the building was fully operational around this date.

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.

Building 2 (AKA CB4) 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 CB4 was expected to be energized by Q3 2026.