1981 Map of Twelvemile Reservoir

About this map

Twelvemile Table dominates this high-plateau landscape along the border of Crook Co and Harney Co as it appeared in the early 1980s. The map illustrates a region where water management was critical for ranching, evidenced by the scattered network of named water sources like Twelvemile Reservoir, Lillard Reservoir, and Coffee Lake, alongside seasonal features such as Old Lakebed Waterhole. Prominent geological formations including Grindstone Rim and Duck Ridge define the vertical relief of the area, while isolated peaks like Spike Butte and Speckle Butte serve as distinct landmarks across the rangeland. Human activity is largely represented by the Berger Ranch, situated near the confluence of Black Snag Creek and other small drainages. The abundance of named springs, such as Mayme Spring, indicates the essential points of interest for local land use and hydrology in this high-desert environment.