
The Lehigh River corridor serves as the industrial and logistical spine for this mid-century survey of the Lehigh Valley. Extensive rail networks including the Reading RR, Lehigh Valley RR, and the Central RR of New Jersey converge on the urban centers, supporting the region's productive quarries and steel-era growth. While the urban cores of Allentown and Bethlehem dominate the center, the landscape transitions into the rolling hills of South Mountain and Saucon Hill to the south.
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1888 · Quakertown
USGS Topo · 1:62,500
1890 · Easton
USGS Topo · 1:62,500
1890 · Doylestown
USGS Topo · 1:62,500
1890 · Quakertown
USGS Topo · 1:62,500
1891 · Easton
USGS Topo · 1:62,500
1891 · Doylestown
USGS Topo · 1:62,500
1891 · Delaware Water Gap
USGS Topo · 1:62,500
1893 · Delaware Water Gap
USGS Topo · 1:62,500
1894 · Allentown
USGS Topo · 1:62,500
1894 · Quakertown
USGS Topo · 1:62,500