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1989 Map of Garrison

Name: 1989 Topographic Map of Garrison
Creator: U.S. Geological Survey
Published: 1989
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1989

About this map

Garrison serves as a critical valley junction in the late 1980s, situated where the Little Blackfoot River meets the Clark Fork. This survey captures the complex infrastructure required to navigate the mountain terrain, showing a network of tunnels, a pipeline, and high-voltage transmission lines traversing the heights. The industrial footprint of the era is evident in the numerous adits and mine workings scattered across the northern slopes near Bear Gulch and Springs Creek.

Transportation history is written into the landscape via the Old RR Grade, which follows the river's path alongside modern rail lines. Smaller settlements and water crossings like Brock Creek and Independence Creek provide detail for researchers tracing early mountain access routes. The presence of a substation and radio tower further illustrates the modernization of this Powell County corridor during the late twentieth century.