
The high plateau of Matney Flat dominates this 1970s survey of Gilliam County, characterized by a series of deep canyons that drain toward the East Fork Thirty-mile Creek. The landscape reflects a remote agricultural and transport infrastructure, featuring the Kinzua and Southern RR winding through the western canyons. Evidence of local life and early travel is scattered throughout the breaks, including the Condon Trail and several springs that likely served as critical water points for livestock and travelers alike.
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This is the sole edition of this map. No revisions or reprints were ever made.
1916 · Condon
USGS Topo · 1:125,000
1953 · Pendleton
USGS Topo · 1:250,000
1953 · The Dalles
USGS Topo · 1:250,000
1956 · The Dalles
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1957 · The Dalles
USGS Topo · 1:250,000
1968 · Gooseberry
USGS Topo · 1:24,000
1969 · Lonerock
USGS Topo · 1:24,000
1970 · Condon
USGS Topo · 1:24,000
1970 · Salmon Fork
USGS Topo · 1:24,000