
Bacona stands as the primary settlement on this landscape, which is defined by the high ridges and watercourses of northwestern Oregon. The territory is heavily shaped by forest management and fire prevention, as evidenced by Mansfield Lookout and Pisgah Lookout perched atop the high ground. The drainage pattern is complex, with the East Fork Nehalem River cutting through the northern section and the South Scappoose Creek and East Fork Dairy Creek flowing south, indicating the area's role as a hydrological divide.
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1915 · Hillsboro
USGS Topo · 1:62,500
1918 · Hillsboro
USGS Topo · 1:62,500
1922 · St. Helens
USGS Topo · 1:62,500
1940 · Hillsboro
USGS Topo · 1:62,500
1940 · Vernonia
USGS Topo · 1:62,500
1941 · St Helens
USGS Topo · 1:62,500
1941 · Gales Creek
USGS Topo · 1:62,500
1943 · Vernonia
USGS Topo · 1:62,500
1943 · St Helens
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000