1951 Map of Heise

About this map

Snake River hydrology dominates the landscape south of the Madison and Jefferson county line, where a sophisticated network of irrigation infrastructure supported mid-century agriculture. Significant canals including the Sunnydell Canal, Poplar Canal, and Enterprise Canal divert from the main channel near the Diversion Dam. The topography transitions from the alluvial floor of Butler Island to the higher elevations of Kelly Mtn and the canyonlands to the east. Geothermal features are a distinct local characteristic, evidenced by Elkhorn Warm Spring, Hawley Warm Spring, and the Hot Springs near the settlement of Heise. Transportation corridors like the Union Pacific railroad and the curiously named Squires Duway track the western edge of the highlands, connecting small rural outposts like Jenson and Byrne.