
The Columbia River serves as the dominant artery of commerce and geography in this 1922 survey, carving through the landscape and defining the boundary between Oregon and Washington. This era was characterized by a heavy reliance on both water and rail transportation, as evidenced by the presence of the Spokane Portland and Seattle Ry. and the Northern Pacific RR. flanking the riverbanks. The industrial footprint of the early 20th century is visible through the Logging R.R. lines pushing into the timbered uplands and the Dupont Powder Co. facility located near the river.
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This is the sole edition of this map. No revisions or reprints were ever made.