The town of Sandborn serves as the central hub for this portion of Knox County, where the agricultural landscape is defined by an intricate network of drainage systems. Key waterways such as Brewer Ditch, Hamilton Ditch, and Beehunter Ditch illustrate the long-term engineering required to manage the low-lying terrain. To the west, the settlement of Pleasantville sits near the edges of More Lake and Reservoir Number Twenty-nine, while Marco marks the northeastern reach of the survey area.
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1938 · Switz City
USGS Topo · 1:24,000
1940 · Linton
USGS Topo · 1:24,000
1943 · Lyons
USGS Topo · 1:24,000
1943 · Sandborn
USGS Topo · 1:24,000
1943 · Bicknell
USGS Topo · 1:24,000
1943 · Plainville
USGS Topo · 1:24,000
1943 · Dugger
USGS Topo · 1:24,000
1943 · Epsom
USGS Topo · 1:24,000
1944 · Bucktown
USGS Topo · 1:24,000
1947 · Switz City
USGS Topo · 1:24,000