The Middle Gila Basin: An Archaeological and Historical Overview

The Central Arizona Project (CAP) , Indian Distribution Division (IDD) is designed to deliver allocated CAP water to Indian users. The Middle Gila Basin Overview is the initial cultural resources planning study for the system. It summarizes and evaluates the extant data in an area 3,570 square miles (9,139 sq km) large, centered on the Gila River.

The data suggests that archaeological sites in this area are numerous and varied, but most of all poorly-studied despite 100 years of research. A defensible culture history and chronology exists for only 35 percent of the 12,000 years of human history in the Basin. Given this, an assumption that basic interpretive frameworks are available to support sophisticated processural arguments is inaccurate. Further data analysis shows that site distributions correspond to physical and biotic zones in only the most general sense. Sites tend to be large and densely-clustered on the second terraces of major rivers; large sites, less-closely spaced are also in higher interior valleys. Sites on upper bajadas slopes appear to be specialized activity areas, while valley bottom sites contain material suggestive of encampments and villages. Most important, the patterns of previous field investigdtions more than anything else are responsible for apparent clusterings of sites. Large areas of the Middle Gila Basin remain unexplored. CAP-IDD systems are likely to encounter substantial archaeological remains along almost any intended, gravity- flow canal alignment, and in many field areas proposed for agricultural development. Of these remains, the majority can qualify, probably, for inclusion in the National Register of Historic Place because, in reality, we know so little about them.

See the appendices for a full site list.