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1958 Map of Tyonek A-8, 1969 Print
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1958 Map of Tyonek A-8

USGS Topo · Published 1969

About this map

Chakachamna Lake and the expansive ice of Shamrock Glacier dominate this mid-century Alaskan landscape within the Kenai Peninsula Borough. The map captures a transition point in the glacial drainage system, where the Chilligan River feeds into the main lake and a solitary Cabin sits near the river mouth, indicating a rare point of human presence in this high-elevation terrain. To the west, Kenibuna Lake is fed by the Neacola River and Igitna River, creating a complex network of glacial meltwater. The topographic survey provides precise detail on the Crevasses and ice movements of the glacier as it pushes toward Shamrock Lake, offering a scientific record of the area's geography before later decades of environmental change.

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Map Details

Date Portrayed1958
Date Published1969
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:63,360
Physical Dimensions17 x 20.9 inches

Editions of this 1958 Tyonek A-8 Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain