
The Little Juniata River carves a deep path through the Ridge-and-Valley province, anchoring a series of industrial and residential settlements including Tyrone, Tyrone Forge, and Birmingham. The landscape is dominated by the massive ridge of Bald Eagle Mountain, which separates the river valley from the plateau-like terrain of the Centre and Blair county border. This modern survey illustrates how historically significant gaps and hollows, such as Plummers Hollow and California Hollow, continue to dictate the transportation corridors of the region.
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This is the sole edition of this map. No revisions or reprints were ever made.
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