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1920 Map of Flathead Lake
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1920 Map of Flathead Lake

USGS Topo · Published 1920

About this map

Flathead Lake dominates this progressive military survey, illustrating the complex hydrology and early development of the region during the transition following the opening of the Indian Reservation. The map details an extensive irrigation network essential to the era's agricultural expansion, featuring the Pablo Reservoir, Crow Creek Reservoir, and a web of waterways including the Feeder Canal and Dixon Polson Canal. This water infrastructure supported growing settlements like Polson, Ronan, and Pablo along the N. P. Ry. line.

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Map Details

Date Portrayed1920
Date Published1920
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:125,000
Physical Dimensions17.22 x 22.61 inches

Editions of this 1920 Flathead Lake Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain