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1949 Map of Portage
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1949 Map of Portage

USGS Topo · Published 1949

About this map

The Missouri River carves a deep path through the high plains north of Great Falls, defining the industrial and logistical character of this 1940s landscape. This survey, part of a Department of the Interior program for the development of the Missouri River Basin, documents the significant hydroelectric infrastructure of the era, including the Morony Dam, Ryan Dam, and Rainbow Dam. These power sources supported the growth of the region and the nearby Great Falls Army Air Force Base.

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Map Details

Date Portrayed1949
Date Published1949
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions17 x 20.7 inches

Editions of this 1949 Portage Map

Historical Maps of Great Falls Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain