2015 Map of Big Sandy Reservoir

About this map

The Big Sandy Reservoir dominates this high-plains landscape, serving as a critical water management feature where the Big Sandy River is impounded. This 2015 survey illustrates the interface between public land management and the arid terrain of western Wyoming, showing the reservoir's complex shoreline as it straddles the boundary between Sublette Co and Sweetwater Co. The map detail captures the remote nature of the region, where infrastructure is limited to primary corridors like U.S. Route 191 and secondary access points such as Haystack Butte Rd. The intricate contour lines reveal the subtle elevation shifts and drainage patterns of the surrounding basin, providing a clear record of the area's hydrology and land divisions within the Public Land Survey System.