1981 Map of Ayer Spring

About this map

Ayer Spring and the headwaters of Pennel Creek characterize this high plains landscape at the intersection of Prairie, Custer, and Fallon counties. The terrain is marked by a complex drainage network where Dry Fork Pennel Creek joins the main branch, reflecting the seasonal hydrology of eastern Montana. While much of the land remains open range, the inclusion of several labeled Well sites and a Drill Hole indicates mid-century energy exploration efforts. A long Pipeline segment cuts across the central sections of the map, illustrating the infrastructure required to move resources across this sparsely settled territory. The map also delineates several township and range boundaries, providing a clear record of land division in a region dominated by Pine Creek and various unnamed ephemeral springs.