
Mount Hood dominates the western landscape of this mid-century survey, its ice-capped peak anchoring the Mount Hood National Forest while the Columbia River carves a deep path through the eastern plateau. The map captures a pivotal era for the river corridor, showing The Dalles Dam St Pk and Lake Cellilo during the early years of the dam's operation. This industrial and transport artery is lined with critical infrastructure, from the Union Pacific and Spokane Portland and Seattle railroads to the Marshall Museum and several state parks like Mayer St Pk and Celilo St Pk. To the south and east, the transition from timbered heights to dry wheat country is marked by settlements such as Tygh Valley, Maupin, and Grass Valley. Significant indigenous lands are noted at the Warm Springs Indian Reservation and Yakima Indian Reservation, reflecting the complex heritage of the mid-Columbia region.
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