Tyrone serves as the industrial and residential anchor of this region, situated where Sink Run and Decker Run meet the Little Juniata River. The landscape is defined by the tight valley corridors of central Pennsylvania, where settlements like Northwood, Nealmont, and Tyrone Forge follow the river’s path. To the east, the topography opens into smaller agricultural and residential clusters such as Warriors Mark and Birmingham, the latter located near a distinctive bend in the river known as Birmingham Bridge.
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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