Fluid circulation in the Earth's crust plays an essential role in surface, near-surface, and deep-crustal processes. The permeability of the Earth's crust is of particular interest because it determines the feasibility of important physicochemical processes, such as advective solute/heat transport and the generation of elevated fluid pressures by processes such as physical compaction, heating, mineral dehydration, and fluid injection. The foundation of DigitalCrust is a geologic scaffolding that describes the basic geologic fabric of the Earth's upper crust, from the critical zone to the brittle-ductile transition, and includes data spanning its full range of physical, chemical, and biological properties. Within the foundational geologic scaffolding, DigitalCrust will support multiscale integration of fluid-relevant properties. For geofluids applications, the DigitalCrust architecture needs to assimilate observational data and interpretations from all available sources, including geologic maps, cross sections and structural contours, hydrogeologic unit delineations, soil tests, slug tests, aquifer pump tests, and indirect property estimates obtained through model inversions.