Grantsville and its surrounding mountain ridges define this corridor through Garrett Co and Somerset Co, where the historic National Pike crosses the Casselman River. The landscape is shaped by the steep rises of Negro Mountain and Meadow Mtn, with the river system providing a focal point for settlements like Jennings and Bevansville. In the northern section, the border between Pennsylvania and Maryland cuts across high elevations like Christner Hill and Ringer Hill, illustrating the trans-border connectivity of rural communities like Springs and Niverton.
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1899 · Grantsville
USGS Topo · 1:62,500
1900 · Accident
USGS Topo · 1:62,500
1904 · Grantsville
USGS Topo · 1:62,500
1921 · Meyersdale
USGS Topo · 1:62,500
1922 · Confluence
USGS Topo · 1:62,500
1931 · Confluence
USGS Topo · 1:62,500
1933 · Confluence
USGS Topo · 1:62,500
1939 · Meyersdale
USGS Topo · 1:62,500
1944 · Meyersdale
USGS Topo · 1:62,500
1946 · Grantsville
USGS Topo · 1:24,000