
Summerville sits at the edge of the Grande Ronde Valley, where the flat agricultural plains meet the rising timber of the Whitman National Forest. This landscape is defined by the transition from irrigated valley floors to the high ridges of Mt Emily, which reaches over 6,000 feet. The settlement pattern reflects an early reliance on gravity-fed water systems, evidenced by the Ordell Ditch and Dobbin Ditch which cut across the lowlands to support regional ranching.
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2 editions found
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