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1916 Map of Casco Bay, 1957 Print
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1916 Map of Casco Bay

USGS Topo · Published 1957

About this map

Coastal Maine's strategic maritime landscape is defined by the heavy fortification of Portland harbor and the surrounding islands during the early twentieth century. This survey details a comprehensive network of coastal defense installations, including Fort McKinley on Great Diamond Island, Fort Williams at Portland Head, and Fort Preble on the mainland. These military sites, alongside the Quarantine Station and Marine Hospital, illustrate the critical role of Casco Bay as both a primary commercial gateway and a fortified naval perimeter.

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Map Details

Date Portrayed1916
Date Published1957
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions17 x 20.7 inches

Editions of this 1916 Casco Bay Map

Historical Maps of Portland Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain