
Pittsburg sits at the convergence of the Nehalem River and several creek drainages in this 2017 study of Columbia County. The landscape is defined by the winding Nehalem Valley, where the Scappoose-Vernonia Hwy meets the Pittsburg-St Helens Rd. This area serves as a significant junction for timber and transport routes, evident by the dense network of main line logging roads such as Cedar Creek Mnln and Kauppi Mnln that permeate the surrounding uplands.
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1919 · Mayger
USGS Topo · 1:62,500
1940 · Vernonia
USGS Topo · 1:62,500
1941 · Keasey
USGS Topo · 1:62,500
1941 · Clatskanie
USGS Topo · 1:62,500
1941 · Cathlamet
USGS Topo · 1:62,500
1943 · Vernonia
USGS Topo · 1:62,500
1943 · Keasey
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000