Negro Mountain rises to the highest point in Pennsylvania at Mt Davis, overlooking the steep drainage basins of Elklick Cr and the Casselman River. This 2019 survey captures the rugged upland character of Somerset County, where the topography is defined by high ridges like Glade Mtn and Winding Ridge. The local geography is marked by historic transit corridors and small settlements, including Markleton and Pinkerton, the latter notable for its proximity to the Pinkerton Tunnel.
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This is the sole edition of this map. No revisions or reprints were ever made.
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