
The Big Sioux River forms a winding natural border between Iowa and South Dakota, anchoring a landscape defined by its river-and-rail connectivity in the late 1960s. The town of Hawarden serves as the local hub, situated at the confluence of the Chicago and North Western and Milwaukee Road railways. This rail intersection highlights the area's historical role as a regional transport corridor. To the north, the Rock River joins the Big Sioux near Oak Grove State Park, where the terrain transitions from cultivated plains to the wooded bluffs of the river valley.
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This is the sole edition of this map. No revisions or reprints were ever made.
1897 · Canton
USGS Topo · 1:125,000
1898 · Elk Point
USGS Topo · 1:125,000
1900 · Canton
USGS Topo · 1:125,000
1901 · Elk Point
USGS Topo · 1:125,000
1907 · Elk Point
USGS Topo · 1:125,000
1955 · Sioux City
USGS Topo · 1:250,000
1955 · Sioux Falls
USGS Topo · 1:250,000
1958 · Sioux City
USGS Topo · 1:250,000
1958 · Sioux Falls
USGS Topo · 1:250,000
1959 · Sioux City
USGS Topo · 1:250,000