
The Columbia River serves as the central artery for this 1916 survey, dividing the high plateaus of Oregon and Washington. This era was defined by the competing interests of water and rail, with the Oregon-Washington RR & Nav Co and the Spokane Portland & Seattle railroads flanking the river. Hazards like the Owyhee Rapids and Blalock Rapids illustrate the challenges of river navigation before the age of major dams, while the Oregon Trail remains visible as it skirts south of the Willamette Base Line.
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4 editions found
1906 · Blalock Island
USGS Topo · 1:125,000
1908 · Blalock Island
USGS Topo · 1:125,000
1910 · Zillah
USGS Topo · 1:125,000
1915 · Prosser
USGS Topo · 1:125,000
1916 · Condon
USGS Topo · 1:125,000
1917 · Prosser
USGS Topo · 1:125,000
1937 · White Swan
USGS Topo · 1:125,000
1950 · Yakima
USGS Topo · 1:250,000
1953 · Pendleton
USGS Topo · 1:250,000
1953 · Walla Walla
USGS Topo · 1:250,000