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1952 Map of Trinity Islands B-2 and C-2

Name: 1952 Topographic Map of Trinity Islands B-2 and C-2
Creator: U.S. Geological Survey
Published: 1981
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1981

About this map

Tugidak Island dominates this 1952 chart, showing a low-lying landscape defined by intricate tidal flats and scattered lagoons. Located within the Kodiak Island Borough, the island's coastline is marked by navigationally significant landmarks like Red Bluff and Shallow Point. The interior is sparsely developed, with a solitary Cabin and the Tugidak East Base survey point representing the only human footprint in this corner of the Trinity Islands.

A treacherous maritime environment is evident along the eastern shore, where Tugidak Passage separates the main island from Sitkinak Island. The presence of an Exposed Wreck near the northern flats serves as a reminder of the region's historical shipping hazards. Grounded in 1950s hydrographic and aerial data, the map details a shifting shoreline where Tidal Flat areas and hazards like Dry Rock were critical for coastal navigation.