
The Columbia River and Willamette River serve as the primary conduits for settlement and industry on this mid-century survey, anchoring the urban center of Portland and Vancouver. To the west, the landscape transitions from the agricultural heart of the Yamhill Valley, with towns like McMinnville, Dayton, and Lafayette, toward the densely forested Coast Range. This area is characterized by the massive extent of the Siuslaw National Forest and the Grand Ronde Indian Reservation, where logging and tribal lands intersect with coastal communities such as Tillamook and Seaside.
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This is the sole edition of this map. No revisions or reprints were ever made.
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