  The Sanford Underground Research Facility (SURF) has been operating for more
than 15 years as an international facility dedicated to advancing compelling
multidisciplinary underground scientific research in rare-process physics, as
well as offering research opportunities in other disciplines. SURF laboratory
facilities include a Surface Campus as well as campuses at the 4850-foot level
(1490 m, 4300 m.w.e.) that host a range of significant physics experiments,
including the LUX-ZEPLIN (LZ) dark matter experiment and the MAJORANA
DEMONSTRATOR neutrinoless double-beta decay experiment. The CASPAR nuclear
astrophysics accelerator completed the first phase of operation and is planning
for the second phase beginning in 2024. SURF is also home to the Long-Baseline
Neutrino Facility (LBNF) that will host the international Deep Underground
Neutrino Experiment (DUNE). SURF offers world-class service, including an
ultralow background environment, low-background assay capabilities, and
electroformed copper is produced at the facility. SURF is preparing to increase
underground laboratory space. Plans are advancing for construction of new large
caverns (nominally 100m L x 20m W x 24m H) on the 4850L (1485 m, 4100 m.w.e.)
on the timeframe of next generation experiments (~2030). SURF plans to leverage
existing advisory and community committees as well as engage the underground
science community to inform plans for future laboratory space.
