
Bullis Mills and the surrounding borderlands of McKean County sit at the confluence of industry and agriculture in the early 1970s. The Allegheny River and Oswayo Creek carve through the landscape, defining the northern reaches of the quadrangle where the Penn Central tracks and an Old Railroad Grade trace the valley floors. The presence of the Sartwell Oil Field, Annin Oil Field, and Ceres Oil Field signals the region's long-standing reliance on resource extraction, with numerous oil wells and gas wells peppered across the hillsides of Eldred and Annin townships.
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2 editions found
1898 · Olean
USGS Topo · 1:62,500
1925 · Belmont
USGS Topo · 1:62,500
1933 · Smethport
USGS Topo · 1:62,500
1934 · Coudersport
USGS Topo · 1:48,000
1937 · Smethport
USGS Topo · 1:62,500
1938 · Coudersport
USGS Topo · 1:62,500
1938 · Olean
USGS Topo · 1:62,500
1939 · Belmont
USGS Topo · 1:62,500
1943 · Olean
USGS Topo · 1:62,500
1957 · Warren
USGS Topo · 1:250,000