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1951 Map of Petersburg B-6

Name: 1951 Topographic Map of Petersburg B-6
Creator: U.S. Geological Survey
Published: 1975
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1975

About this map

Kuiu Island and its intricate network of bays and straits are documented here following 1948 aerial photography and 1951 field annotation. The terrain is defined by the deep indentations of Alvin Bay and Reid Bay, leading south toward the waters of Port Beauclerc. This maritime landscape, entirely within the Tongass National Forest, centers on a cluster of islands in the Sumner Strait, including Conclusion Island and Sumner Island.

Navigational markers such as Beauclerc Light on the small Beauclerc Island indicate the importance of these waterways for travel and industry. While mostly uninhabited, the presence of isolated Cabin and Cabins labels suggests seasonal use or small-scale outposts. To the east, the map details hazards like Mariposa Reef and Calder Rocks, which flank the passage through Keku Strait. The topographic detail peaks at Beauclerc Peak, providing a clear record of the coastline before mid-century changes in Alaskan coastal management.