The U.S. Geological Survey (USGS), created in 1879, is the national geological survey
for the United States and the sole science agency within its cabinet-level bureau, the
Department of the Interior. The USGS has a broad mission, including: serving the Nation by
providing reliable scientific information to describe and understand the Earth; minimize loss of
life and property from natural disasters; manage water, biological, energy, and mineral
resources; and enhance and protect quality of life. USGS scientific activities are organized
around major topics, or Mission Areas, aligned with distinct science themes; three-dimensional
(3-D) modelling typically supports research and project work within a specific Mission Area. The
vastness, diversity, and complexity of the geological landscape of the United States has
resulted in the creation of 3-D geological framework models that are local or regional in scale; a
National-scale 3-D model is only beginning to evolve. This paper summarizes 3-D geological
modeling at the USGS and does not discuss 3-D modeling that is conducted by other Federal
agencies, state geological surveys, academia, or industry within the U.S. This paper updates
and expands upon a similar status report of USGS 3-D modeling activities of Jacobsen et al.
(2011).