2019 Map of Dewey Lake

About this map

Dewey Lake and the surrounding high plains of Glasscock County define this landscape, characterized by a series of ephemeral water catchments and drainage channels known locally as draws. This 2019 survey illustrates the subtle topographical shifts of the Llano Estacado, where landforms like The Neck and seasonal features such as Salt Lake indicate the area's arid nature and reliance on water management. Significant drainage systems, including Mustang Draw, Johnson Draw, Meyers Draw, and Thirtysix Draw, crisscross the terrain, showing how water moves through this ranching-heavy region. Human intervention is evidenced by the presence of livestock watering holes such as Bluebell Tank and Big Tank, which are vital for local agriculture in a territory largely defined by its natural drainage patterns and unpaved access roads like Co RD 455.