
McNary Dam stands as the central engineered landmark of this mid-century Columbia River landscape, regulating the waters between Lake Wallula and Lake Umatilla. This survey captures the complex intersection of hydroelectric power, irrigation, and transport, with the Umatilla River meeting the Columbia near the established town of Umatilla. The region's industrial and agricultural dependence is evident in the network of canals, gravel pits, and the massive Umatilla Ordnance Depot visible in the southwest. Transport corridors are well-defined, showing the Burlington Northern and Union Pacific railroads flanking the river, alongside the Pacific Highway and the Umatilla Toll Bridge connecting Oregon to Washington. Smaller communities like Power City, McNary, and Charlestown cluster near the dam and riverbanks, reflecting the mid-20th-century growth driven by the Powerhouse and nearby irrigation projects like the Threemile Falls Diversion Works.
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