White Swan serves as the primary hub of this landscape, situated at the edge of Medicine Valley and the broader Yakima Valley. The settlement pattern reflects a transition from the agricultural lowlands to the more open reaches of Olney Flat. An extensive network of irrigation infrastructure, including the West Unit One Highline Canal, Main Canal Extension, and the Ayres Lateral, demonstrates the managed water systems necessary for ranching and farming in this region.
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This is the sole edition of this map. No revisions or reprints were ever made.
1899 · Ellensburg
USGS Topo · 1:125,000
1901 · Ellensburg
USGS Topo · 1:125,000
1937 · White Swan
USGS Topo · 1:125,000
1950 · Yakima
USGS Topo · 1:250,000
1958 · Toppenish Mtn.
USGS Topo · 1:24,000
1958 · Harrah
USGS Topo · 1:24,000
1958 · Yakima West
USGS Topo · 1:24,000
1958 · Fort Simcoe
USGS Topo · 1:24,000
1958 · Fort Simcoe
USGS Topo · 1:62,500
1958 · Wiley City
USGS Topo · 1:24,000