
Blue Mountain forms a formidable geological divide in this mid-century survey, separating the valley settlements of Northampton County from the rising Pocono Mountains to the north. The landscape is defined by a dense network of rural schoolhouses and family-named landmarks, such as Buskirk Sch and Jackson Sch, reflecting the decentralized community structure of the Pennsylvania countryside before widespread school consolidation. Industrial activity is concentrated at the Chapman Quarries and along the tracks of the Lehigh and New England railroad, which threads through the namesake Wind Gap pass. This gap serves as a critical transit corridor, connecting Saylorsburg with Pen Argyl. To the west, the winding Aquashicola Creek and Pohopoco Creek drain the terrain near Kresgeville and Kunkletown, illustrating the complex drainage patterns that shaped early regional road placement and village development.
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1890 · Easton
USGS Topo · 1:62,500
1891 · Easton
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
1902 · Slatington
USGS Topo · 1:62,500
1914 · Wind Gap
USGS Topo · 1:62,500
1916 · Wind Gap
USGS Topo · 1:62,500
1919 · Pocono
USGS Topo · 1:62,500
1921 · Pocono
USGS Topo · 1:62,500