2011 Map of Dewey Flat

About this map

San Carlos Reservoir dominates this high-desert landscape in Graham County, where the impounded waters of the Gila River stretch across the western and central reaches of the map. The settlement of Natches sits along the northern shoreline, connected to the surrounding topography by a network of primitive routes including Road 420 and Road 400. This 2011 survey reveals a complex hydrological system of dry washes and canyons that feed into the basin, such as Coyote Wash and Sycamore Gulch. To the east, the terrain opens into the namesake Dewey Flat, a distinct alluvial area where Coolidge Dam Rd traverses the river corridor. The presence of Sherman Spring and established Indian Routes like Indian Rte 555 indicate the importance of water access and historical transit paths through this arid region.