  This is a Snowmass 2021 Topical Report for the Underground Facilities and
Infrastructure Frontier on Synergies in Research at Underground Facilities: A
broad range of scientific and engineering research is possible in underground
laboratories, beyond the physics-focused activities described in the other
Underground Facilities and Infrastructure Topical Reports. These areas of
research include nuclear astrophysics, geology, geoengineering, gravitational
wave detection, biology, and perhaps soon quantum information science. This UF
Topical Report will survey those other scientific and engineering research
activities that share interest in research-orientated Underground Facilities
and Infrastructure. In most cases the breadth and depth of research aims is too
large to cover in completeness and references to surveys or key documents for
those fields are provided after introductory summaries. Additional attention is
then given to shared, similar, and unique needs of each research area with
respect to the broader underground research community's Underground Facilities
and Infrastructure needs. Where potential conflicts of usage type, site, or
duration might arise, these are identified.
