Sanford Underground Research Facility
Underground laboratory in the former Homestake gold mine, Lead, South Dakota.
At a glance
| Source | Author | Role | In one line |
|---|---|---|---|
| Why America is Hollowing Out a Mountain | The B1M | subject | Formerly the longest continuously operated and deepest gold mine in America (closed 2002), it is being hollowed out at level 4,850 (about 1,475 m deep) for three huge caverns. |
Why America is Hollowing Out a Mountain — The B1M (2025)
Source: Original · Readwise highlight
And it’s here that the far detector is being built: at level 4,850.
- Role: subject
- In the video: Formerly the longest continuously operated and deepest gold mine in America (closed 2002), it is being hollowed out at level 4,850 (about 1,475 m deep) for three huge caverns. Work from 2012 replaced the steel sets down the 1,500 m shaft, and by 2024 800,000 tonnes of rock had been excavated for the DUNE far detector.
- Why it matters: It is the main site of the video: the far end of the experiment and the biggest caverns ever built at that depth.