This report summarizes revisions to the Depth-to- Bedrock (DTB) contour map after Richard et al. (2007) along the boundary between the southeastern Higley basin near Queen Creek, AZ, and the northeastern Picacho basin near the town of Florence (Figure 1). This study represents a southward continuation of recent modifications to DTB in the eastern Higley basin or Superstition Vistas Planning Area (Gootee et al., 2017). The thickness and subsurface extent of Gila River deposits in the Florence area was updated in this study to help identify subsurface relationships to adjacent basin fill units and to understand history of Gila River integration.