
The eastern edge of the Grande Ronde Valley meets the high elevations of the Wallowa-Whitman National Forest in this survey of northern Union County. The settlement of Summerville serves as the focal point for a landscape defined by an organized grid of ranch roads and irrigation infrastructure, including the Ordell Ditch. To the west, the terrain rises sharply toward Mount Emily, where deep drainage systems like Rail Canyon and Bull Canyon carve through the timber. Local community life is anchored by landmarks such as the Pleasant Grove Grange Hall and the Pioneer Monument, reflecting the area's long agricultural heritage. Between the flat valley floor and the high ridgelines of Burnt Ridge and Herron Ridge, the map captures a transition from intensive farming to the timbered reaches of the Blue Mountains.
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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 · Hilgard
USGS Topo · 1:24,000
1963 · Summerville
USGS Topo · 1:24,000
1964 · Thimbleberry Mtn
USGS Topo · 1:24,000