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1955 Map of Umiat D-3

Name: 1955 Topographic Map of Umiat D-3
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

The Colville River carves a massive, braided path through the North Slope in this mid-century survey, defining the eastern boundary of what was then designated the National Petroleum Reserve in Alaska. The landscape is characterized by a complex network of thousands of small thaw lakes and meandering tributaries, including the Kikiakrorak River and Kogosukruk River, which feed into the main channel from the west.

Prominent landforms like Sentinel Hill and Ishukpak Bluff rise above the alluvial plain, providing essential topographic orientation in an otherwise low-lying wilderness of water and tundra. This 1955 survey, which includes minor revisions from 1985, captures the hydrological state of the region before significant modern industrial infrastructure altered the remote character of the Reserve Boundary corridor.