Masonville serves as the central hub of this eastern Iowa landscape, situated at the intersection of a grid-iron street plan and the primary regional transit corridors. The village is defined by a tight cluster of local roads, including Gordon St, John St, and Bernhart St, which transition quickly into the expansive agricultural sections of Delaware County. This layout illustrates the persistence of small-town Iowa infrastructure alongside modernized transportation routes like Highway 20.
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1900 · Anamosa
USGS Topo · 1:125,000
1901 · Oelwein
USGS Topo · 1:125,000
1902 · Elkader
USGS Topo · 1:125,000
1903 · Winthrop
USGS Topo · 1:125,000
1959 · Dubuque
USGS Topo · 1:250,000
1961 · Dubuque
USGS Topo · 1:250,000
1962 · Dubuque
USGS Topo · 1:250,000
1965 · Thorpe
USGS Topo · 1:24,000
1965 · Lamont
USGS Topo · 1:24,000
1965 · Dundee
USGS Topo · 1:24,000