1986 Map of Thorn Creek Reservoir

About this map

Macon Flat occupies the northwestern corner of this mid-1980s landscape, where three Idaho counties—Camas, Gooding, and Lincoln—converge. The terrain is defined by a sophisticated network of water management, illustrated by numerous impoundments including Thorn Creek Reservoir, Divide Reservoir, and Snake Reservoir. These features, alongside the meandering Thorn Creek, reveal a high-desert environment engineered for livestock or agricultural support. Named water sources such as Barrel Water Hole, Middle Water Hole, and Uphill Water Hole are scattered across the high ground, serving as critical landmarks in an otherwise open range. To the south, the relief deepens significantly into Rattlesnake Canyon and Preacher Gulch, while Timber Gulch leads toward the drainage of Portuguese Creek. This survey captures the region just as modern mapping transitions were beginning, preserving the locations of springs like Eusebio Spring and Rattlesnake Spring that have long anchored local land use.