2014 Map of Froelich Dam

About this map

Porcupine Hills dominate the southeastern landscape of this Sioux County quadrangle, rising above the surrounding prairie as a series of prominent ridges and drainages. The Froelich Dam serves as a primary water management feature in the west, creating a significant catchment area that contrasts with the arid character of the neighboring terrain. This 2014 survey documents a region defined by its wide, open spaces and a network of tribal and local roads, such as Bia-7 and 87th St SW, which trace the section lines typical of the Great Plains. The hydrology is centered on Porcupine Cr, which meanders through the northern and eastern portions of the map, while Little Heart Flats provides a rare level expanse amidst the rising elevation. The layout illustrates the sparse settlement patterns of the Fort Yates District, where geography and elevation dictate the paths of rural infrastructure.