Harrison Valley serves as a primary local hub along the Cowanesque River, where it meets the North Branch Cowanesque River near the border between Potter County, Pennsylvania, and Steuben County, New York. The landscape is defined by a dense network of hollows and ridges, with the settlements of Mills and North Fork situated along narrow valley floors. These communities are connected by a system of rural roads like Genesee Mills Rd and Harrison Fox Hill Rd that navigate the steep elevation changes characteristic of this region.
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1899 · Gaines
USGS Topo · 1:62,500
1900 · Gaines
USGS Topo · 1:62,500
1926 · Wellsville
USGS Topo · 1:62,500
1926 · Greenwood
USGS Topo · 1:62,500
1932 · Genesee
USGS Topo · 1:62,500
1937 · Genesee
USGS Topo · 1:62,500
1950 · Elmira
USGS Topo · 1:250,000
1954 · Williamsport
USGS Topo · 1:250,000
1954 · Troupsburg
USGS Topo · 1:24,000
1957 · Potter Brook
USGS Topo · 1:24,000