This report summarizes a search for evidence of Quaternary faulting along the Gila River in central Arizona. The region covered in this analysis extends about 40 km north and south of the Gila River between 1100 and 111 0 30' W longitude (Figure 1). The goal of this study has been to delineate any possible Quaternary faults in the area surrounding existing and potential dam sites on the Gila River. The study consisted of systematic interpretation of aerial photography to locate possible Quaternary faults, helicopter overflight of the most suspicious features, and brief field reconnaissance of some of the features. Based on this analysis, features were classified as being either possible Quaternary faults or unlikely to be Quaternary faults.