
Pasco and Kennewick serve as the industrial and transit hubs of the Tri-Cities region in the mid-1960s, defined by the convergence of the Columbia River and Snake River. The landscape is a study in mid-century development, where irrigation projects like the Highland Feeder Canal and numerous siphons have transformed the arid terrain adjacent to the Horse Heaven Hills. This era shows the vital river-and-rail infrastructure in its prime, with the Union Pacific and Spokane Portland and Seattle railroads connecting the Port of Pasco to the wider world.
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This is the sole edition of this map. No revisions or reprints were ever made.
1908 · Umatilla
USGS Topo · 1:125,000
1915 · Wallulah
USGS Topo · 1:96,000
1917 · Pasco
USGS Topo · 1:125,000
1918 · Wallula
USGS Topo · 1:125,000
1935 · Pendleton
USGS Topo · 1:125,000
1951 · Richland
USGS Topo · 1:62,500
1953 · Pendleton
USGS Topo · 1:250,000
1953 · Walla Walla
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1958 · Walla Walla
USGS Topo · 1:250,000