
Casco Bay is defined by a dense constellation of coastal fortifications and maritime transit lines that connect Portland to its outlying islands. Defensive history is layered across the harbor, marked by coastal batteries and fortifications such as Fort Gorges, Fort Preble, and Fort Levett, reflecting the strategic military importance of this Maine coastline across multiple centuries. On the mainland, the map details established neighborhoods like South Portland and Falmouth Foreside, where family and community history is preserved in sites like the Eastern Cem and Foreside Community Cem.
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This is the sole edition of this map. No revisions or reprints were ever made.
1891 · Portland
USGS Topo · 1:62,500
1892 · Freeport
USGS Topo · 1:62,500
1893 · Portland
USGS Topo · 1:62,500
1893 · Casco Bay
USGS Topo · 1:62,500
1894 · Gray
USGS Topo · 1:62,500
1898 · Gray
USGS Topo · 1:62,500
1914 · Portland
USGS Topo · 1:48,000
1914 · Casco Bay
USGS Topo · 1:48,000
1916 · Portland
USGS Topo · 1:62,500
1916 · Casco Bay
USGS Topo · 1:62,500