This document is a "Class I overview" of prehistoric cultural resources within the Lower Gila North planning area defined by the Bureau of Land Management, an agency of the U.S. Department of the Interior. Regional Class I overview preparation is an important phase of the cultural resource inventory process outlined in BLM Manual 81111, Release 8-3 (1978). All lands within the boundaries of a study area, not just federally administered lands, are taken into consideration.