
Sandy Ridge and the small settlement of Glass City occupy the high country along the border of Centre and Clearfield counties during the late 1950s. This landscape is defined by its extractive history and vast public lands, with several active Mines dotting the western slopes near the Pennsylvania rail line. The terrain is deeply incised by drainages like Cold Stream and Moshannon Creek, while the Philipsburg Reservoir sits tucked into the northern ridges.
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6 editions found
1903 · Houtzdale
USGS Topo · 1:62,500
1905 · Houtzdale
USGS Topo · 1:62,500
1920 · Altoona
USGS Topo · 1:62,500
1922 · Philipsburg
USGS Topo · 1:62,500
1922 · Altoona
USGS Topo · 1:62,500
1923 · Tyrone
USGS Topo · 1:62,500
1929 · Tyrone
USGS Topo · 1:48,000
1933 · Tyrone
USGS Topo · 1:62,500
1939 · Philipsburg
USGS Topo · 1:62,500
1944 · Houtzdale
USGS Topo · 1:24,000