Mississippi River waters dominate this 2011 survey, where the river braids into a complex network of backwaters and islands including Cavanaugh Bottom, Eldridge Island, and the Savanna Islands. The topography illustrates the vital connection between Savanna, Illinois, and the island community of Sabula, Iowa, linked by the Savanna-Sabula Bridge. This geography defines the local economy and transport, from the Sabula Post Office near the water's edge to the inland reaches of Beaver Creek and the Elk River.
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This is the sole edition of this map. No revisions or reprints were ever made.
1891 · Clinton
USGS Topo · 1:62,500
1892 · Goose Lake
USGS Topo · 1:62,500
1892 · Savanna
USGS Topo · 1:62,500
1894 · Goose Lake
USGS Topo · 1:62,500
1894 · Clinton
USGS Topo · 1:62,500
1899 · Clinton
USGS Topo · 1:125,000
1935 · Miles
USGS Topo · 1:62,500
1941 · Miles
USGS Topo · 1:62,500
1952 · Clinton
USGS Topo · 1:62,500
1952 · Savanna
USGS Topo · 1:62,500