Perkiomen Creek and its complex network of tributaries, including the East Branch Perkiomen Creek and Unami Creek, shape the settlement patterns and modern landscape of this Montgomery County region. The terrain is notably defined by Spring Mountain and the expansive Green Lane Reservoir, around which local roads wind through established communities like Perkiomenville, Green Lane, and Sumneytown.
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1888 · Quakertown
USGS Topo · 1:62,500
1890 · Quakertown
USGS Topo · 1:62,500
1894 · Quakertown
USGS Topo · 1:62,500
1894 · Norristown
USGS Topo · 1:62,500
1895 · Norristown
USGS Topo · 1:62,500
1896 · Norristown
USGS Topo · 1:62,500
1902 · Boyertown
USGS Topo · 1:62,500
1906 · Phoenixville
USGS Topo · 1:62,500
1942 · Norristown
USGS Topo · 1:125,000
1943 · Quakertown
USGS Topo · 1:31,680