
The Illinois River dominates this mid-1970s landscape, serving as the border between Calhoun and Jersey counties. The eastern bank is defined by the steep bluffs of Rosedale Ridge and Dividing Ridge, where Pere Marquette State Park hosts recreational grounds like Camp Piasa and Camp Quatoga. In the low-lying bottomlands, a complex network of backwaters including Stump Lake, Fuller Lake, and Swan Lake forms part of the Mark Twain National Wildlife Refuge, illustrating the area's significance for migratory waterfowl.
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This is the sole edition of this map. No revisions or reprints were ever made.
1903 · O'Fallon
USGS Topo · 1:125,000
1927 · St. Charles
USGS Topo · 1:62,500
1930 · Hardin
USGS Topo · 1:62,500
1930 · Jerseyville
USGS Topo · 1:62,500
1931 · Brussels
USGS Topo · 1:62,500
1933 · Jerseyville
USGS Topo · 1:62,500
1933 · Saint Charles
USGS Topo · 1:62,500
1934 · Hardin
USGS Topo · 1:62,500
1938 · Hardin
USGS Topo · 1:62,500
1939 · Brussels
USGS Topo · 1:62,500