2014 Map of Nilan Reservoir

About this map

Nilan Reservoir dominates the high plains of this Lewis and Clark County landscape, serving as a critical water management feature within the ranching and agricultural lands east of the Rocky Mountain Front. The terrain is defined by a series of drainage systems, including Willow Cr in the north and the meandering path of Smith Cr through the central portion of the map. Rising sharply above the surrounding draws and benches, Haystack Butte provides a prominent landmark for the area, while the narrow passage of Swallow Canyon sits near the eastern boundary. This 2014 survey documents the network of rural infrastructure, such as Bench Mark Rd and Smith Creek Rd, that connects isolated water bodies like Anderson Lake and Smith Lake. The map illustrates the specialized hydrology of the region, where seasonal flows like Goss Cr and Blubber Cr drain toward the larger reservoir system.