
The Columbia River serves as the central artery of this 1916 survey, carving a deep gorge between Washington and Oregon. Along its banks, the competing tracks of the Spokane Portland & Seattle Ry and the Oregon-Washington Railroad & Navigation Co illustrate the intense rail rivalry of the early twentieth century. These lines connect vital river settlements like Arlington, Blalock, and Roosevelt, which acted as shipping points for the vast agricultural uplands.
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