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1932 Map of Irwin

Name: 1932 Topographic Map of Irwin
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

Irwin and the surrounding river valleys are documented here during the early 1930s, showing a landscape defined by the Snake River and the high peaks of the Teton National Forest and Caribou National Forest. The geography of this era reflects a reliance on river crossings and timber, with Edwards Ferry providing transit across the Snake and Weeks Sawmill operating in the northern canyons. Remote outposts and government presence are evident through numerous stations, such as the Snake River Ranger Sta and the Caribou Basin Ranger Sta.

Resource extraction and local education are central to the settlement pattern, anchored by Caribou City and a network of rural schools including Pumpkin Center Sch, Amesville Sch, and Grays Lake Sch. To the south, Grays Lake dominates the basin, while the rugged terrain is dotted with family-named landmarks and high-altitude features like Caribou Mtn and Baldy Mtn. This record captures the region before mid-century changes to the river and infrastructure.