
The Columbia River serves as a powerful boundary between Oregon and Washington on this 1912-1913 survey, which captures the river before modern dams altered its course. Along its banks, dangerous navigation points like the Owyhee Rapids and Blalock Rapids define the water's character, while the parallel lines of the Spokane Portland And Seattle RY and the Union Pacific railroad reflect the vital transportation corridor of the era. South of the river in Oregon, the historic path of the Oregon Trail remains a visible landmark across the landscape.
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