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1971 Map of Chandler Lake A-2

Name: 1971 Topographic Map of Chandler Lake A-2
Creator: U.S. Geological Survey
Published: 1974
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1974

About this map

The Continental Divide winds through this high-latitude terrain, marking the hydrographic split between the Arctic and Pacific watersheds. This 1971 survey captures a wilderness dominated by massive glacial features and steep drainage systems, most notably the West Alapah Glacier and East Alapah Glacier flanking Alapah Mountain. The topography is defined by narrow corridors like the Valley of Precipices and Grizzly Valley, which channel meltwater into major regional arteries.

Water systems flow north via the Anaktuvuk River and Nanushuk River, while the southern reaches of the map feed into the North Fork Koyukuk River. Strategic topographic breaks such as Ernie Pass and Ernie Creek suggest the natural routes through the Brooks Range before modern infrastructure. Named peaks like Marshmallow Mountain, Cockedhat Mountain, and Rumbling Mountain serve as primary landmarks in this unsurveyed landscape, where land lines were predetermined by the Bureau of Land Management rather than physically marked on the ground.