
Shell Rock River defines the geography of this North Iowa landscape, carving a valley that dictated the placement of the region's earliest rail and settlement hubs. In the late 1950s, Nora Springs and Rock Falls served as primary anchors for a rural economy centered on the river and the intersecting lines of the Chicago Rock Island and Pacific and the Chicago Milwaukee St Paul and Pacific railroads.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Mason City
USGS Topo · 1:250,000
1957 · Mason City
USGS Topo · 1:250,000
1958 · Mason City
USGS Topo · 1:250,000
1959 · Mason City
USGS Topo · 1:24,000
1959 · Mason City
USGS Topo · 1:62,500
1959 · Mason City SE
USGS Topo · 1:24,000
1959 · Hanford
USGS Topo · 1:24,000
1971 · Rockford
USGS Topo · 1:24,000
1971 · Rudd
USGS Topo · 1:24,000
1972 · Osage SW
USGS Topo · 1:24,000