1958 Map of Tyonek A-8

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.