Scrubgrass Creek and its many forks define the rural landscape of this western Pennsylvania region, where early twentieth-century industry meets scattered crossroads settlements. The Allegheny River cuts through the northeast corner near Rockland, while the interior is dotted with historical mill sites like Sutton Mill and Sedwicks Mill. These water-powered landmarks, alongside the Johnston Dam, reflect the area's long-standing reliance on its drainage network for local enterprise.
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1907 · Foxburg
USGS Topo · 1:62,500
1908 · Foxburg
USGS Topo · 1:62,500
1909 · Franklin
USGS Topo · 1:62,500
1910 · Hilliards
USGS Topo · 1:62,500
1911 · Franklin
USGS Topo · 1:62,500
1912 · Hilliards
USGS Topo · 1:62,500
1922 · Oil City
USGS Topo · 1:48,000
1924 · Oil City
USGS Topo · 1:62,500
1943 · Oil City
USGS Topo · 1:62,500
1944 · Hilliards
USGS Topo · 1:62,500