Potato Creek meanders through this portion of McKean County, serving as the central drainage for a landscape defined by deeply etched hollows and oil production. The borough of Smethport sits at the confluence of Marvin Creek and Blacksmith Run, where the Hamlin Lake Park Dam regulates the local waters. The area's industrial legacy is visible in the Sartwell Oil Field to the northeast and the Marvin Creek Oil Field to the west, reflecting the region's long-standing connection to Pennsylvania's petroleum history.
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1924 · Bradford
USGS Topo · 1:62,500
1926 · Bradford
USGS Topo · 1:62,500
1933 · Smethport
USGS Topo · 1:62,500
1935 · Mt. Jewett
USGS Topo · 1:48,000
1937 · Smethport
USGS Topo · 1:62,500
1940 · Mt. Jewett
USGS Topo · 1:62,500
1941 · Bradford
USGS Topo · 1:62,500
1944 · Bradford
USGS Topo · 1:62,500
1948 · Crosby
USGS Topo · 1:62,500
1948 · Norwich
USGS Topo · 1:24,000