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1951 Map of Cordova A-7 and A-8

Name: 1951 Topographic Map of Cordova A-7 and A-8
Creator: U.S. Geological Survey
Published: 1967
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1967

About this map

Cape Hinchinbrook anchors this coastal survey, where the rugged southern tip of Hinchinbrook Island meets the open waters of the Gulf of Alaska. Mapping the vital navigational approach to Prince William Sound, the sheet details the Hinchinbrook Lighthouse Reserve, a critical outpost featuring a Lighthouse and a Radio Tower atop the cliffs. These installations guarded the western edge of Hinchinbrook Entrance, a deep-water passage between the island and the northeastern tip of Montague Island.

Hydrographic data reveals a landscape of underwater hazards and solitary landforms like Seal Rocks, situated in the mouth of the entrance. For maritime historians and researchers of Alaska's coastal infrastructure, the map provides a clear picture of mid-century navigational aids and the topographical isolation of these lighthouse stations before the transition to fully automated systems. The soundings and depth curves across the Pacific Ocean floor reflect the primary maritime corridors of the era.