
Necanicum River drainage systems define this section of Clatsop County, where the landscape is characterized by a dense network of watercourses and timber access routes. The Necanicum Mainline serves as a primary artery through the southern portion of the map, tracing the valley floor near the North Fork Necanicum River. To the north, the headwaters of the Lewis and Clark River and its various forks, including the Little South Fork Lewis and Clark River, carve through the terrain toward the Columbia River. High points like Davis Point and Twin Peaks provide significant landmarks for understanding the local topography.
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This is the sole edition of this map. No revisions or reprints were ever made.
1919 · Astoria
USGS Topo · 1:62,500
1939 · Astoria
USGS Topo · 1:62,500
1939 · Saddle Mountain
USGS Topo · 1:62,500
1940 · Svensen
USGS Topo · 1:62,500
1940 · Cape Falcon
USGS Topo · 1:62,500
1943 · Saddle Mtn.
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000
1949 · Tillamook Head
USGS Topo · 1:24,000
1949 · Green Mountain
USGS Topo · 1:24,000
1949 · Gearhart
USGS Topo · 1:24,000