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1955 Map of Bradfield canal D-6, 1974 Print
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1955 Map of Bradfield canal D-6

USGS Topo · Published 1974

About this map

Tongass National Forest dominates this high-altitude borderlands area where the United States-Canada boundary follows the jagged peaks of the Coast Mountains. The map illustrates a remote wilderness defined by steep glaciated terrain and the international divide, which separates Alaska from British Columbia. Mapping this rugged boundary required specialized control points, noted here as Mt Talbot and Mt Gallatin, which served as critical triangulation stations for surveyors. Below these peaks, the Tasekili River provides a primary drainage corridor. This sheet offers a meticulous record of the mid-century topographic effort to delineate the boundary in one of the continent's most challenging landscapes, where the absence of roads or permanent settlements highlights the extreme isolation of the region.

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Map Details

Date Portrayed1955
Date Published1974
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:63,360
Physical Dimensions18.1 x 21.9 inches

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain