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1956 Map of Coleen B-1

Name: 1956 Topographic Map of Coleen B-1
Creator: U.S. Geological Survey
Published: 1963
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1963

About this map

The Porcupine River carves a deep valley through the wilderness of the United States Canada borderlands in this 1950s survey. This remote landscape is defined by the Upper Ramparts, where the river is joined by significant tributaries including the Rapid River and the Campbell River. The topography is marked by prominent elevations such as Canalaska Mountain and high-altitude survey markers like VABM Crown 1955.

A network of watercourses, including White Mountain Creek, Sunagun Creek, and Fred Creek, drains the mountainous terrain toward the primary river corridor. This map captures the region as it existed during the mid-20th century, before modern infrastructure reached this portion of the Alaska Yukon boundary, preserving the exact placement of triangulation stations and natural landmarks used by early surveyors.