
Le Mars serves as the regional hub in this early 1960s survey, showing a concentrated urban center defined by institutional landmarks like Westmar College, the Courthouse, and the local Armory. The landscape is dominated by the winding path of the Floyd River, which dictates the placement of the Chicago And North Western and Illinois Central railroads. These rail lines connect smaller agrarian settlements such as Alton, Maurice, and Seney, each serving as local collection points for the surrounding townships.
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1954 · Fairmont
USGS Topo · 1:250,000
1954 · Fort Dodge
USGS Topo · 1:250,000
1955 · Sioux City
USGS Topo · 1:250,000
1955 · Sioux Falls
USGS Topo · 1:250,000
1957 · Fort Dodge
USGS Topo · 1:250,000
1958 · Sioux City
USGS Topo · 1:250,000
1958 · Sioux Falls
USGS Topo · 1:250,000
1958 · Fort Dodge
USGS Topo · 1:250,000
1958 · Fairmont
USGS Topo · 1:250,000
1959 · Sioux City
USGS Topo · 1:250,000