1957 Map of Casco Bay, 1966 Print
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1957 Map of Casco Bay

USGS Topo · Published 1966

About this map

Portland and the jagged islands of the Maine coastline emerge in detail during the late 1950s, a period when the region's deep military and maritime roots remained highly visible. The landscape is defined by its defensive history, featuring the Fort Mc Kinley Naval Res on Great Diamond Island and the Fort Williams Military Res standing guard over the harbor entrance. These fortifications, along with Fort Gorges and Fort Scammel, illustrate the strategic importance of this harbor through the mid-20th century.


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Map Details

Date Portrayed1957
Date Published1966
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions17.9 x 21.8 inches

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Source Details

CopyrightPublic Domain