Each feature class or feature dataset is in Geographic (GCS) NAD83 unless otherwise noted
STRCT_ARC: Structures are discrete, physically existing things that are built. Structures are things created to support treatment, recreation or other management activities. STRCT_ARC contains, but is not limited to, features such as pipelines, fences, and trails.
This dataset is used for depicting structures on maps, for providing information useful to the maintenance of structures on the ground, and for reporting on construction activity.