
The ridge-and-valley landscape of central Pennsylvania is deeply etched across this 1939 survey, centered on the historic iron and rail hub of Orbisonia. The East Broad Top RR winds through the northern valleys, serving settlements like Rockhill and Saltillo, while the massive engineering of the Pennsylvania Turnpike cuts through the southern reaches, including the Tuscarora Tunnel. This era represents a significant transition in transportation, as the narrow-gauge rail infrastructure of the previous century shared the terrain with the newly emerging high-speed toll road.
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7 editions found
1900 · Mercersburg
USGS Topo · 1:62,500
1901 · Huntingdon
USGS Topo · 1:62,500
1902 · Chambersburg
USGS Topo · 1:62,500
1902 · Mercersburg
USGS Topo · 1:62,500
1904 · Huntingdon
USGS Topo · 1:62,500
1919 · Mattawana
USGS Topo · 1:62,500
1922 · Mt Union
USGS Topo · 1:48,000
1923 · Shippensburg
USGS Topo · 1:62,500
1924 · Mt. Union
USGS Topo · 1:62,500
1925 · Needmore
USGS Topo · 1:48,000