
Hiawatha Valley and the expansive waters of Potholes Reservoir define this mid-1950s landscape in Grant County. The map documents a pivotal moment for the region’s water management, recording the reservoir at an elevation of 1039 feet in June 1956. This man-made water body significantly altered the local geography, inundating the complex topography of The Potholes where water now weaves through a labyrinth of semi-submerged Sand Dunes.
12 named features on this map. Tap any name to fly to it.
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1910 · Winchester
USGS Topo · 1:62,500
1911 · Red Rock
USGS Topo · 1:62,500
1912 · Moses Lake
USGS Topo · 1:62,500
1923 · Corfu
USGS Topo · 1:62,500
1950 · Smyrna
USGS Topo · 1:62,500
1951 · Smyrna
USGS Topo · 1:62,500
1951 · Corfu
USGS Topo · 1:62,500
1953 · Walla Walla
USGS Topo · 1:250,000
1953 · Ritzville
USGS Topo · 1:250,000
1956 · Moses Lake South
USGS Topo · 1:24,000