Stony Mountain dominates the landscape of East Hanover Township, where the ridgelines of central Pennsylvania create a distinct northeast-southwest topographical grain. The area's hydrology is defined by the DeHart Reservoir and a complex network of streams including Stony Cr, Manada Cr, and N Fork Powells Cr. These valleys have long dictated the movement of people, from the primitive footpaths of the Appalachian Trl E to the established road networks connecting the settlement at Grantville.
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1892 · Lykens
USGS Topo · 1:62,500
1892 · Hummelstown
USGS Topo · 1:62,500
1892 · Harrisburg
USGS Topo · 1:62,500
1893 · Lykens
USGS Topo · 1:62,500
1893 · Millersburg
USGS Topo · 1:62,500
1899 · Harrisburg
USGS Topo · 1:62,500
1924 · Hummelstown
USGS Topo · 1:62,500
1924 · Harrisburg
USGS Topo · 1:62,500
1943 · Millersburg
USGS Topo · 1:62,500
1943 · Lykens
USGS Topo · 1:62,500