
The Allegheny River valley forms the industrial and cultural heart of this Southern Tier region in the early 1960s. Olean is depicted in extensive detail, showing the city's growth into neighborhoods like Boardmanville and East Olean, while the campus of St Bonaventure University dominates the landscape to the west. The area's economic foundations are evident in the dense network of the Erie-Lackawanna and Pennsylvania Railroad, alongside a sprawling oil field that blankets the southern hills toward the Pennsylvania border.
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1898 · Olean
USGS Topo · 1:62,500
1900 · Salamanca
USGS Topo · 1:62,500
1924 · Bradford
USGS Topo · 1:62,500
1926 · Bradford
USGS Topo · 1:62,500
1933 · Smethport
USGS Topo · 1:62,500
1937 · Smethport
USGS Topo · 1:62,500
1938 · Salamanca
USGS Topo · 1:62,500
1938 · Olean
USGS Topo · 1:62,500
1941 · Bradford
USGS Topo · 1:62,500
1943 · Olean
USGS Topo · 1:62,500