Phinny Hill rises as a prominent landmark in this rural section of Klickitat County, where the high plateaus of south-central Washington meet the drainage of the Columbia River basin. The landscape is defined by deep incisions like Tule Canyon and Dead Canyon, which channel seasonal runoff toward Alder Cr. This 2017 survey reveals an agricultural and utility-focused infrastructure, notably centered around the Mercer Ranch Airport and a network of specialized routes such as Booster Pump Rd and Microdish Rd.
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1906 · Blalock Island
USGS Topo · 1:125,000
1908 · Blalock Island
USGS Topo · 1:125,000
1910 · Zillah
USGS Topo · 1:125,000
1915 · Prosser
USGS Topo · 1:125,000
1916 · Arlington
USGS Topo · 1:125,000
1917 · Prosser
USGS Topo · 1:125,000
1950 · Yakima
USGS Topo · 1:250,000
1953 · Pendleton
USGS Topo · 1:250,000
1953 · Walla Walla
USGS Topo · 1:250,000
1953 · The Dalles
USGS Topo · 1:250,000