
Blue Mountain anchors the northern ridge of this Pennsylvania landscape, where the Lehigh River carves a deep path through the Lehigh Valley. The late 1950s development of Allentown is evident in the burgeoning residential grids of Woodlawn and Park Way Manor, while the surrounding countryside maintains its deep-rooted agricultural and industrial character. The map documents a dense network of rail infrastructure, including the Lehigh Valley RR and the Central RR of New Jersey, which serviced the river corridor and the local quarries near Cementon and Egypt.
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1888 · Quakertown
USGS Topo · 1:62,500
1889 · Hazleton
USGS Topo · 1:62,500
1890 · Quakertown
USGS Topo · 1:62,500
1891 · Hazleton
USGS Topo · 1:62,500
1893 · Hazleton
USGS Topo · 1:62,500
1894 · Reading
USGS Topo · 1:62,500
1894 · Allentown
USGS Topo · 1:62,500
1894 · Quakertown
USGS Topo · 1:62,500
1902 · Boyertown
USGS Topo · 1:62,500
1902 · Slatington
USGS Topo · 1:62,500