
The Grande Ronde Valley floor dominates this part of Union County, where the meandering Grande Ronde River and the engineered State Ditch define the agricultural landscape. The small settlements of Summerville, Imbler, and Alicel are linked by the Or-82 corridor, serving as the primary hubs for this rural community. To the east, the terrain rises sharply toward Mountain Harris, marking the transition from the flat basin to the wooded uplands.
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This is the sole edition of this map. No revisions or reprints were ever made.
1906 · Telocaset
USGS Topo · 1:125,000
1953 · Pendleton
USGS Topo · 1:250,000
1955 · Grangeville
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1959 · Grangeville
USGS Topo · 1:250,000
1963 · La Grande SE
USGS Topo · 1:24,000
1963 · Sanderson Spring
USGS Topo · 1:24,000
1963 · Summerville
USGS Topo · 1:24,000
1964 · Cricket Flat
USGS Topo · 1:24,000
1964 · Elgin
USGS Topo · 1:24,000